{"title":"Chess","prompt":"I want to get good at chess","summary":"A strong player sees a chess position as a few familiar patterns: a pawn structure, a castled king, a tactic waiting to happen. Each move, they read the position (material, pawns, king safety, piece activity), choose a plan that fits it, then calculate the forcing lines to check that the move is safe. The game has three phases: an opening that players often prepare at home, a middlegame of plans and tactics, and an endgame of exact technique. A clock limits the thinking time. Players improve by playing, going over their games, and studying master games and puzzles until the patterns are recognised at a glance.","root":"chess-game","nodes":[{"term":"Game of chess","aka":["a chess game","a game in progress"],"kind":"product","plain":"Two players move 16 pieces each on an 8×8 board, one move at a time, against a clock. The aim is to checkmate the other king.","ask":"Who stands better here, why, and what should happen next?","cues":["8×8 board with 16 pieces per side","Moves played against a clock","Scoresheet recording every move"],"children":["rules","opening","position","middlegame","tactics","calculation","endgame","clock","improvement"],"variants":[{"label":"Setting","items":[{"id":"over-the-board","name":"Over the board","plain":"A physical board and pieces, a chess clock and a scoresheet on which both players write every move.","sources":[{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 8.1.1","quote":"In the course of play each player is required to record his/her own moves and those of his/her opponent in the correct manner, move after move, as clearly and legibly as possible","work":"fide-laws-of-chess"}]},{"id":"online","name":"Online","plain":"The same game on a screen. The app shows the clocks and records the moves.","sources":[{"label":"FIDE, Online Chess Regulations","url":"https://handbook.fide.com/chapter/OnlineChessRegulations","kind":"standard","page":"Introduction","quote":"players transmit moves via the internet whether they play them using a virtual chess board broadcast by the online playing site or using an electronic chess board (eBoard)","work":"fide-online-chess-regulations"}],"tint":{"frame":"#202326","clock":"#202326"},"svg":{"clock-face":"","scoresheet":""}}]}],"sources":[{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 1.1 and 1.4","quote":"The game of chess is played between two opponents who move their pieces on a square board called a ‘chessboard’.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 1.4","quote":"The objective of each player is to place the opponent’s king ‘under attack’ in such a way that the opponent has no legal move.","work":"fide-laws-of-chess"}],"id":"chess-game","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""},{"slot":"clock","shape":"box","size":[0.5,0.26,0.2],"pos":[0.84,-0.37,0.06],"material":"gloss","color":"#1b1b1f"},{"slot":"clock","shape":"box","size":[0.08,0.03,0.08],"pos":[0.72,-0.225,0.06],"material":"metal","color":"#c9c9cf"},{"slot":"clock-face","shape":"plane","size":[0.44,0.2],"pos":[0.84,-0.37,0.161],"material":"screen","color":"#ffffff","svg":""},{"slot":"scoresheet","shape":"plane","size":[0.42,0.6],"pos":[-0.84,0.05,0],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Rules","aka":["laws of chess","legal framework"],"kind":"part","plain":"The rules are the legal and competitive framework for chess: how pieces move, how games end, and how a clock is used in over-the-board play.","does":"Turns a board position and a player's move into a legal game with a result.","ask":"Is this move legal, and what result or claim follows?","children":["piece-moves","check-and-mate","special-moves","draw-rules"],"at":[0,0.22,0],"sources":[{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"0.1 Introduction","quote":"FIDE Laws of Chess cover over-the-board play.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"0.1 Introduction","quote":"The Laws of Chess have two parts: 1. Basic Rules of Play and 2. Competitive Rules of Play.","work":"fide-laws-of-chess"}],"id":"rules","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Piece moves","aka":["how the pieces move","legal movement"],"kind":"concept","plain":"Each piece has a defined movement geometry; bishops, rooks and queens slide along unobstructed lines, while knights jump and pawns have asymmetric moves.","does":"Defines the destinations, blocks and captures that a legal move can use.","ask":"Which squares can this piece legally reach, and what blocks or captures along the way?","cues":["Sliding bishops, rooks and queens","Knights jumping","Pawns with asymmetric moves"],"at":[-0.28,0.22,0.02],"sources":[{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 3.2–3.5","quote":"The bishop may move to any square along a diagonal on which it stands.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 3.3–3.6","quote":"The rook may move to any square along the file or the rank on which it stands.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 3.4–3.6","quote":"The queen may move to any square along the file, the rank or a diagonal on which it stands.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 3.5–3.6","quote":"When making these moves, the bishop, rook or queen may not move over any intervening pieces.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 3.6","quote":"The knight may move to one of the squares nearest to that on which it stands but not on the same rank, file or diagonal.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 3.7.1–3.7.3","quote":"The pawn may move forward to the square immediately in front of it on the same file, provided that this square is unoccupied, or","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 3.7.3","quote":"the pawn may move to a square occupied by an opponent’s piece diagonally in front of it on an adjacent file, capturing that piece.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 3.8.1","quote":"by moving to an adjoining square","work":"fide-laws-of-chess"}],"id":"piece-moves","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Check and mate","aka":["check","checkmate"],"kind":"concept","plain":"Check is an attack on the king; checkmate is check for which the player has no legal answer.","does":"Makes king safety the immediate legal constraint and the game's winning condition.","ask":"Is the king attacked, and can any legal move remove the attack?","at":[0.28,0.22,0.02],"sources":[{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 1.4–1.4.1","quote":"The objective of each player is to place the opponent’s king ‘under attack’ in such a way that the opponent has no legal move.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 1.4.1","quote":"The player who achieves this goal is said to have ‘checkmated’ the opponent’s king and to have won the game.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 3.9.1–3.9.2","quote":"The king is said to be 'in check' if it is attacked by one or more of the opponent’s pieces, even if such pieces are constrained from moving to the square occupied by the king because they would then leave or place their own king in check.","work":"fide-laws-of-chess"}],"id":"check-and-mate","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Special moves","aka":["castling, en passant and promotion"],"kind":"concept","plain":"Castling moves a king and rook together, en passant permits a narrowly timed pawn capture, and promotion replaces a pawn that reaches the farthest rank.","does":"Adds exceptional legal moves whose exact preconditions and timing matter.","ask":"Did the exact precondition and timing for this special move hold?","cues":["King and rook moved together","En passant capture after the pawn advance","Pawn on the farthest rank replaced by another piece"],"at":[-0.02,0.12,0.03],"sources":[{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 3.7.3.1–3.7.3.2","quote":"This capture is only legal on the move following this advance and is called an ‘en passant’ capture.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 3.7.3.3–3.7.3.5","quote":"When a player, having the move, plays a pawn to the rank furthest from its starting position, he/she must exchange that pawn as part of the same move for a new queen, rook, bishop or knight of the same colour on the intended square of arrival.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 3.8.2","quote":"This is a move of the king and either rook of the same colour along the player’s first rank, counting as a single move of the king and executed as follows: the king is transferred from its original square two squares towards the rook on its original square, then that rook is transferred to the square the king has just crossed.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 3.8.2.1–3.8.2.2","quote":"The right to castle has been lost: 1) If the king has already moved, or 2) With a rook that has already moved.","work":"fide-laws-of-chess"}],"id":"special-moves","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Draw rules","aka":["drawn game","ways a game is drawn"],"kind":"concept","plain":"Chess can end without a winner by stalemate, dead position, agreement, repetition, or the move-count rules for positions without pawn moves or captures.","does":"Stops a game when checkmate cannot be produced or when a defined draw condition is met.","ask":"Is the position a dead position, a stalemate, a repetition, an agreed draw, or a 50/75-move case?","at":[0.02,-0.02,0.04],"sources":[{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 5.2.1","quote":"The game is drawn when the player to move has no legal move and his/her king is not in check. The game is said to end in ‘stalemate’. This immediately ends the game, provided that the move producing the stalemate position was in accordance with Article 3 and Articles 4.2 – 4.7.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 5.2.2","quote":"The game is drawn when a position has arisen in which neither player can checkmate the opponent’s king with any series of legal moves. The game is said to end in a ‘dead position’. This immediately ends the game, provided that the move producing the position was in accordance with Article 3 and Articles 4.2 – 4.7.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 5.2.3","quote":"The game is drawn upon agreement between the two players during the game, provided both players have made at least one move. This immediately ends the game.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 9.2","quote":"The game is drawn, upon a correct claim by a player having the move, when the same position for at least the third time (not necessarily by a repetition of moves):","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 9.3","quote":"9.3.2 the last 50 moves by each player have been completed without the movement of any pawn and without any capture.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 9.6","quote":"If one or both of the following occur(s) then the game is drawn: 9.6.1 the same position has appeared, as in 9.2.2 at least five times.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 9.6.2","quote":"9.6.2 any series of at least 75 moves have been made by each player without the movement of any pawn and without any capture. If the last move resulted in checkmate, that shall take precedence.","work":"fide-laws-of-chess"}],"id":"draw-rules","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Opening","aka":["opening phase","first phase of the game"],"kind":"part","plain":"The opening is the first phase of a chess game, from the first move until the game makes a subjective transition into the middlegame.","does":"Establishes the early development, central contest and king-safety choices that shape the position to come.","ask":"What is each side developing toward, and when does the opening give way to the middlegame?","cues":["Early development","Central contest","Castling and king-safety choices"],"children":["opening-principles","opening-system","repertoire"],"at":[0,0.42,0],"sources":[{"label":"Chess.com, Chess Openings (Chess Terms)","url":"https://www.chess.com/terms/chess-openings","kind":"reference","page":"What Is The Opening?","quote":"The opening is the first phase of a chess game, starting from the very first move.","work":"chesscom-chess-openings-terms"},{"label":"Chess.com, Chess Openings (Chess Terms)","url":"https://www.chess.com/terms/chess-openings","kind":"reference","page":"What Is The Opening?","quote":"When the opening ends and the middlegame begins is a subjective question that depends on the flow of each game.","work":"chesscom-chess-openings-terms"},{"label":"Chess.com, Chess Openings (Chess Terms)","url":"https://www.chess.com/terms/chess-openings","kind":"reference","page":"What Is The Opening?","quote":"Generally, the goal for both players in the opening is to develop the pieces, control the center, and get the king safe.","work":"chesscom-chess-openings-terms"}],"id":"opening","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Opening principles","aka":["opening checklist","principles of development"],"kind":"concept","plain":"A practical opening checklist is to contest the central squares, develop knights and bishops toward active squares, castle, and keep watching the opponent's checks, captures and threats.","does":"Gives a player a useful baseline before concrete opening analysis or a prepared line.","ask":"Can I improve development, central control or king safety without ignoring a threat?","cues":["Central squares contested","Knights and bishops on active squares","Castled king"],"at":[-0.28,0.38,0.03],"sources":[{"label":"Chess.com Team, Learn Chess Opening Principles","url":"https://www.chess.com/article/view/learn-chess-opening-principles","kind":"practitioner","page":"Control The Center","quote":"Try to attack those squares, e4, d4, e5 and d5 early in the game.","work":"chesscom-learn-chess-opening-principles"},{"label":"Chess.com Team, Learn Chess Opening Principles","url":"https://www.chess.com/article/view/learn-chess-opening-principles","kind":"practitioner","page":"Develop Your Pieces","quote":"You want to develop your knights and bishops and castle quickly.","work":"chesscom-learn-chess-opening-principles"},{"label":"Chess.com Team, Learn Chess Opening Principles","url":"https://www.chess.com/article/view/learn-chess-opening-principles","kind":"practitioner","page":"Your Opponent's Move","quote":"You want to watch out for any checks, captures, or threats that the opponent might make.","work":"chesscom-learn-chess-opening-principles"}],"id":"opening-principles","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Opening system","aka":["system opening","setup opening"],"kind":"concept","plain":"A system opening is a recurring setup designed to remain usable across many possible replies, such as the Réti or Colle systems.","does":"Offers a reusable structure while adapting the move order to the opponent's choices.","ask":"Which setup remains sound after the opponent chooses a different reply?","cues":["Recurring setup on the board","Move order adapting to the opponent's choices"],"at":[0,0.29,0.04],"sources":[{"label":"C. Kimball, Chess Openings","url":"https://www.chess.com/article/view/chess-openings","kind":"practitioner","page":"Opening classifications","quote":"A “System” opening refers to an opening","work":"chesscom-chess-openings"},{"label":"Irving Chernev, Logical Chess: Move by Move","url":"https://openlibrary.org/books/OL25778382M/Logical_Chess_Move_by_Move","kind":"book","isbn":"9780713484649","page":"annotated game collection","flag":"book text not opened in this pass","work":"irving-chernev-logical-chess"}],"id":"opening-system","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Opening repertoire","aka":["repertoire","prepared openings"],"kind":"concept","plain":"An opening repertoire is the deliberately chosen and consistently used set of openings a player employs as White and as Black.","does":"Turns opening choices into a repeatable preparation map of lines, structures and plans.","ask":"Which line do I play against each common first move or defense, and what positions recur?","at":[0.28,0.29,0.04],"sources":[{"label":"NAbduS, Building an Opening Repertoire in Chess - Part 1","url":"https://www.chess.com/blog/PostMortemChess-Official/building-an-opening-repertoire-in-chess-part-1","kind":"practitioner","page":"What Is an Opening Repertoire?","quote":"An opening repertoire is a deliberately chosen and consistently used set of openings that a chess player employs as White and as Black.","work":"chesscom-opening-repertoire"},{"label":"NAbduS, Building an Opening Repertoire in Chess - Part 1","url":"https://www.chess.com/blog/PostMortemChess-Official/building-an-opening-repertoire-in-chess-part-1","kind":"practitioner","page":"What Is an Opening Repertoire?","quote":"The goal is not merely to memorize moves, but to develop understanding, confidence, and efficiency in the early phase of the game.","work":"chesscom-opening-repertoire"}],"id":"repertoire","look":{"parts":[{"slot":"board","shape":"plane","size":[1.35,1.35],"material":"matte","color":"#d2a679","svg":""},{"slot":"white-card","shape":"box","size":[0.55,0.75,0.05],"pos":[-0.45,0.42,0.1],"material":"matte","color":"#f2eee2"},{"slot":"e4-card","shape":"box","size":[0.55,0.75,0.05],"pos":[0.05,0.42,0.1],"material":"matte","color":"#e7c978"},{"slot":"d4-card","shape":"box","size":[0.55,0.75,0.05],"pos":[0.55,0.42,0.1],"material":"matte","color":"#9db5cb"}]}},{"term":"Position","aka":["board position","the position on the board"],"kind":"part","plain":"The board snapshot a player evaluates for immediate threats and lasting advantages. Strategy turns that snapshot into a purposeful attempt to improve the game.","does":"Provides the shared context for comparing material, structure, king safety, activity, space, and initiative before choosing a plan.","ask":"What changed, what is urgent, and which positional factor should guide the next move?","cues":["Board snapshot","Immediate threats"],"children":["material","pawn-structure","king-safety","piece-activity","space","initiative"],"at":[0,0.18,0],"links":[{"to":"middlegame","rel":"see also"}],"sources":[{"label":"Chess.com, Chess Strategy - 5 Key Concepts to Learn","url":"https://www.chess.com/terms/chess-strategy","kind":"reference","page":"What Is Strategy In Chess?","quote":"Chess strategy is the purposeful attempt to gain an advantage over your opponent. Unlike tactics, chess strategy involves long-term goals, usually related to king safety, pawn structure, space, piece activity, etc.","work":"chess-com-strategy"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 1.1","quote":"The game of chess is played between two opponents who move their pieces on a square board called a ‘chessboard’.","work":"fide-laws-of-chess"}],"id":"position","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Material","aka":["material count","piece balance"],"kind":"concept","plain":"The relative quantity and conventional value of the pieces and pawns still on the board. It is a concrete comparison, not a verdict by itself.","does":"Shows what has been won or sacrificed and frames whether exchanges, activity, or compensation need closer examination.","ask":"Who has more material, and what does the position give the side with less?","cues":["Pieces and pawns still on the board","Captures and sacrifices reflected in the count"],"range":"A common guide is pawn 1, knight or bishop 3, rook 5, queen 9; the king has no point value.","trouble":"Counting points as the result while ignoring activity, king danger, or the position after an exchange.","at":[-0.62,0.42,0.04],"links":[{"to":"exchanges","rel":"controls"},{"to":"piece-activity","rel":"see also"}],"sources":[{"label":"Chess.com, Chess Pieces Value","url":"https://www.chess.com/terms/chess-piece-value","kind":"reference","page":"What Are Chess Piece Values?","quote":"Chess piece values give us a relative worth for each piece. This information helps us determine what piece should be traded for another piece, how we evaluate an exchange, and even how computer engines evaluate a position!","work":"chess-com-piece-value"},{"label":"Chess.com, Chess Pieces Value","url":"https://www.chess.com/terms/chess-piece-value","kind":"reference","page":"What Are Chess Piece Values?","quote":"These point values don't determine who wins a game (the goal of chess is to deliver checkmate, not to capture the most pieces).","work":"chess-com-piece-value"}],"id":"material","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.2022222222222223,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1.1222222222222222],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Pawn structure","aka":["pawn configuration","pawn skeleton"],"kind":"concept","plain":"The placement of the pawns considered on its own. Its chains, islands, open and closed files, holes, and weaknesses shape the plans available to both sides.","does":"Reveals whether the center is open or closed, where weaknesses and targets sit, and which breaks can change the position.","ask":"Which pawn formation is here, what is fixed, and which break or target follows from it?","cues":["Pawn chains and islands","Open or closed files","Holes and weaknesses","Isolated, doubled or backward pawns"],"range":"Open or closed center; chains; islands; isolated, doubled, and backward pawns; holes; pawn breaks.","trouble":"A lasting target, a restricted piece, or a premature pawn move that creates weaknesses and hands the opponent a plan.","at":[-0.2,0.42,0.04],"links":[{"to":"plan","rel":"controls"},{"to":"space","rel":"raises"}],"variants":[{"label":"Named structures","items":[{"id":"structure-carlsbad","name":"Carlsbad structure","plain":"A recurring pawn formation, best known from the Queen's Gambit Declined Exchange Variation, with rich plans such as the minority attack and the e3-e4 central break.","why":"The pawn formation defines it; the Queen's Gambit Declined Exchange Variation is only where it is best known.","sources":[{"label":"Chess.com, Carlsbad Pawn Structure","url":"https://www.chess.com/terms/carlsbad-pawn-structure-chess","kind":"reference","page":"What Is The Carlsbad Pawn Structure?","quote":"The Carlsbad pawn structure can be reached via many openings but is best known from the Queen's Gambit Declined Exchange Variation","work":"chess-com-carlsbad-structure"}],"svg":{"board":""}},{"id":"structure-iqp","name":"Isolated queen's pawn (IQP, isolani)","plain":"An isolated pawn on the d-file, unsupported by another pawn; it can buy space and attacking chances while remaining a structural target.","sources":[{"label":"Chess.com, Isolated Queen's Pawn","url":"https://www.chess.com/terms/isolated-queens-pawn-chess","kind":"reference","page":"What Is An Isolated Queen's Pawn?","quote":"The isolated queen's pawn (also known as an IQP or isolani) refers to an isolated pawn on the d-file. Isolated queen's pawns cannot be protected or supported by another pawn","work":"chess-com-iqp"}],"svg":{"board":""}},{"id":"structure-maroczy-bind","name":"Maroczy Bind","plain":"A formation identified by White pawns on e4 and c4 after Black's c-pawn has traded for White's d-pawn; it restricts Black's freeing breaks.","why":"White pawns on e4 and c4 after Black's c-pawn trades for White's d-pawn define it, whatever opening led there.","sources":[{"label":"Chess.com, Maroczy Bind","url":"https://www.chess.com/terms/maroczy-bind","kind":"reference","page":"What Is The Maroczy Bind?","quote":"The Maroczy Bind is identified by white pawns on e4 and c4 and when Black's c-pawn has been traded for White's d-pawn.","work":"chess-com-maroczy-bind"},{"label":"Chess.com, Maroczy Bind","url":"https://www.chess.com/terms/maroczy-bind","kind":"reference","page":"Why Play The Maroczy Bind?","quote":"The Maroczy Bind is seen in many forms of the Sicilian Defense and is designed to control Black's pawn breaks, in particular the b5 and d5 breaks.","work":"chess-com-maroczy-bind"}],"svg":{"board":""}},{"id":"structure-hanging-pawns","name":"Hanging pawns","plain":"Two adjacent pawns without pawn support from other files; they can be weak targets or a mobile source of space and breaks.","sources":[{"label":"Chess.com, Hanging Pawns","url":"https://www.chess.com/terms/hanging-pawns-chess","kind":"reference","page":"What Are Hanging Pawns?","quote":"The term hanging pawns refers to an important pawn structure in chess. It happens when two pawns stand on adjacent files, with no other pawns being able to protect them.","work":"chess-com-hanging-pawns"}],"svg":{"board":""}}]}],"sources":[{"label":"Chess.com, Pawn Structure in chess","url":"https://www.chess.com/terms/pawn-structure","kind":"reference","page":"What Are Pawn Structures?","quote":"Pawn structure literally refers to the pawn placement or pawn configuration in a position, disregarding all other pieces.","work":"chess-com-pawn-structure"},{"label":"Chess.com, Pawn Structure in chess","url":"https://www.chess.com/terms/pawn-structure","kind":"reference","page":"Why Are Pawn Structures Important?","quote":"Pawn structures can also help us determine concrete plans or strategic goals.","work":"chess-com-pawn-structure"}],"id":"pawn-structure","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"King safety","aka":["king security","king shelter"],"kind":"concept","plain":"How protected a king is from checks, mating threats, and lines opened against its shelter.","does":"Sets the urgency of attack, defense, and simplification: an unsafe king can outweigh a material or space advantage.","ask":"Which king is easier to attack, and which line, defender, or pawn move changes that answer?","cues":["Castled or uncastled king","Intact or weakened shelter","Open lines against the king"],"range":"Safe or exposed; castled or uncastled; intact or weakened shelter; closed or open lines.","trouble":"An exposed king, missing defenders, or a weakened shelter that lets the opponent force checks or mate.","at":[0.62,0.42,0.04],"links":[{"to":"king-attack","rel":"raises"},{"to":"exchanges","rel":"controls"}],"sources":[{"label":"Chess.com, Chess Strategy - 5 Key Concepts to Learn","url":"https://www.chess.com/terms/chess-strategy","kind":"reference","page":"King Safety","quote":"King safety is one of the most critical strategic concepts in chess. Having an unsafe king can be a losing disadvantage because it might cause you to get checkmated.","work":"chess-com-strategy"},{"label":"Chess.com, Chess Strategy - 5 Key Concepts to Learn","url":"https://www.chess.com/terms/chess-strategy","kind":"reference","page":"King Safety","quote":"It's not uncommon for players to sacrifice material to expose the enemy king.","work":"chess-com-strategy"}],"id":"king-safety","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Piece activity","aka":["activity","piece coordination"],"kind":"concept","plain":"How usefully the pieces influence important squares, lines, targets, and the enemy king—not merely how many legal moves they have.","does":"Measures the dynamic force of the army and can compensate for material while revealing which pieces and plans deserve attention.","ask":"Which pieces are doing useful work, which are restricted, and how can coordination change the balance?","cues":["Pieces influencing important squares and lines","Targets around the enemy king","Coordinated or disconnected pieces","Restricted or misplaced piece"],"range":"Active or passive; coordinated or disconnected; developed or restricted; useful or misplaced.","trouble":"A piece has no useful route, a defender is overloaded, or the army is less active than its material count suggests.","at":[-0.62,-0.42,0.04],"links":[{"to":"worst-piece","rel":"see also"},{"to":"initiative","rel":"raises"}],"sources":[{"label":"Chess.com, Chess Strategy - 5 Key Concepts to Learn","url":"https://www.chess.com/terms/chess-strategy","kind":"reference","page":"Piece Activity","quote":"Different from material count, piece activity is more of an abstract concept. A player can have less material than another yet have more active pieces, which can lead to a decisive advantage.","work":"chess-com-strategy"}],"id":"piece-activity","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Space","aka":["space advantage","room to maneuver"],"kind":"concept","plain":"The useful territory behind a player's pawns where pieces can move and maneuver.","does":"Gives its owner more freedom and can restrict the opponent's pieces, while creating a duty to avoid being undermined by breaks.","ask":"Who has more useful room, and can the cramped side challenge it before the space becomes permanent?","range":"More or less space; central, kingside, or queenside space; flexible or overextended.","trouble":"A cramped army cannot maneuver, or advanced pawns become targets and the space advantage collapses.","at":[0,-0.42,0.04],"links":[{"to":"pawn-structure","rel":"see also"},{"to":"exchanges","rel":"raises"}],"sources":[{"label":"Chess.com, Chess Strategy - 5 Key Concepts to Learn","url":"https://www.chess.com/terms/chess-strategy","kind":"reference","page":"Space","quote":"Space is related to the number of squares a player has behind their pawns where they can move their pieces.","work":"chess-com-strategy"},{"label":"Chess.com, Chess Strategy - 5 Key Concepts to Learn","url":"https://www.chess.com/terms/chess-strategy","kind":"reference","page":"Space","quote":"The player with a space advantage can control more squares and enjoy more freedom to move their pieces. Conversely, players who lack space might have a hard time moving their pieces to attack or defend.","work":"chess-com-strategy"}],"id":"space","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Initiative","aka":["dynamic advantage","calling the shots"],"kind":"concept","plain":"The temporary dynamic advantage of making threats that require answers; it is broader than a direct king attack.","does":"Buys time for an attack or for conversion into a lasting advantage, but can vanish when the opponent consolidates.","ask":"Who is making the threats now, and what lasting advantage appears if the pressure is answered?","range":"Temporary or converted; attacking or positional; dynamic against static advantages.","trouble":"The attacker makes a slow move, the opponent gets a free move, and the initiative disappears while a material or structural plus remains.","at":[0.62,-0.42,0.04],"links":[{"to":"plan","rel":"raises"},{"to":"king-attack","rel":"raises"}],"sources":[{"label":"Jeremy Silman, What Is The Initiative?","url":"https://www.chess.com/article/view/what-is-the-initiative","kind":"practitioner","page":"What Is The Initiative?","quote":"An initiative isn’t necessarily an attack. It just means that you are calling the shots and your opponent has to respond.","work":"chess-com-silman-initiative"},{"label":"Jeremy Silman, What Is The Initiative?","url":"https://www.chess.com/article/view/what-is-the-initiative","kind":"practitioner","page":"What Is The Initiative?","quote":"In other cases, you can transform your initiative (usually temporary) into a long-term, static advantage.","work":"chess-com-silman-initiative"}],"id":"initiative","feel":{"shape":0.72,"energy":0.9,"weight":-0.2,"warmth":0.62,"grain":0.25,"motion":"orbit","why":"Initiative feels like hot, fast pressure that circles the opponent before settling into a lasting gain."}},{"term":"Middlegame","aka":["middle game","middle part of the game"],"kind":"part","plain":"The phase after the opening and before the endgame, where strategic and tactical decisions usually decide the game. Its boundaries are practical rather than fixed.","does":"Turns the position's factors into plans, threats, prevention, attacks, and exchanges while shaping the ending that may follow.","ask":"Has the opening given way to a middlegame, and which strategic or tactical problem decides the next move?","children":["plan","prophylaxis","worst-piece","king-attack","exchanges"],"at":[0,-0.18,0],"links":[{"to":"position","rel":"see also"}],"sources":[{"label":"Chess.com, Chess Middlegame","url":"https://www.chess.com/terms/chess-middlegame","kind":"reference","page":"Chess Middlegame","quote":"The middlegame is, as its name implies, the middle part of a chess game, after the opening and before the endgame.","work":"chess-com-middlegame"},{"label":"Chess.com, Chess Middlegame","url":"https://www.chess.com/terms/chess-middlegame","kind":"reference","page":"When Does The Middlegame Begin?","quote":"There's no specific moment where a middlegame is clearly reached.","work":"chess-com-middlegame"},{"label":"Chess.com, Chess Middlegame","url":"https://www.chess.com/terms/chess-middlegame","kind":"reference","page":"Chess Middlegame","quote":"The middlegame is often the most complex and important phase of the game, and most games are decided here.","work":"chess-com-middlegame"}],"id":"middlegame","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Plan","aka":["middlegame plan","strategic plan"],"kind":"concept","plain":"A short, flexible sequence that connects the next move to what the position needs: a threat, improvement, pawn break, or favorable change.","does":"Converts an evaluation into an order of operations, while forcing re-evaluation after the opponent responds.","ask":"What is the opponent threatening, what is my best improvement, and which change favors my strengths?","range":"Often two or three moves; re-evaluate after every opponent move.","trouble":"A plan ignores the opponent, pushes automatically, or treats a general rule as a substitute for concrete calculation.","at":[-0.64,0.42,0.04],"links":[{"to":"pawn-structure","rel":"see also"},{"to":"prophylaxis","rel":"raises"},{"to":"worst-piece","rel":"raises"}],"variants":[{"label":"Named plans","items":[{"id":"plan-minority-attack","name":"Minority attack","plain":"Use a smaller pawn group against a larger pawn majority to force a favorable structural weakness, classically in the Carlsbad structure.","why":"A smaller pawn group attacking a larger majority defines it; the Carlsbad structure is only its classic setting.","sources":[{"label":"Chess.com, Minority Attack","url":"https://www.chess.com/terms/minority-attack-chess","kind":"reference","page":"What Is A Minority Attack?","quote":"A minority attack occurs in chess when one player attacks an opponent's pawn majority with their pawn minority","work":"chess-com-minority-attack"},{"label":"Chess.com, Minority Attack","url":"https://www.chess.com/terms/minority-attack-chess","kind":"reference","page":"What Is A Minority Attack?","quote":"The purpose of a minority attack is to favorably change the pawn structure with the intention of creating a structural weakness","work":"chess-com-minority-attack"}],"svg":{"board":""}},{"id":"plan-central-break-e4","name":"Carlsbad e3-e4 central break","plain":"Prepare the e3-e4 central break, usually with f3, to gain space in the center.","sources":[{"label":"Chess.com, Carlsbad Pawn Structure","url":"https://www.chess.com/terms/carlsbad-pawn-structure-chess","kind":"reference","page":"Carlsbad Pawn Structure Plans","quote":"Another common plan in the Carlsbad pawn structure is to play for the central break with e3-e4, usually with the help of the f-pawn moving to f3 to support the e4-push.","work":"chess-com-carlsbad-structure"}],"svg":{"board":""}},{"id":"plan-pillsbury-attack","name":"Pillsbury Attack","plain":"Plant a knight on e5, support it with f2-f4, and usually build a kingside attack.","sources":[{"label":"Chess.com, Carlsbad Pawn Structure","url":"https://www.chess.com/terms/carlsbad-pawn-structure-chess","kind":"reference","page":"Carlsbad Pawn Structure Plans","quote":"Another respected plan in this pawn structure is known as the Pillsbury Attack, where White plants his knight on e5 and then supports this knight with the f2-f4 push. This plan usually involves a kingside attack.","work":"chess-com-carlsbad-structure"}],"svg":{"board":""}}]}],"sources":[{"label":"Waleed Naeem, How to Make a Plan in the Chess Middlegame","url":"https://www.chess.com/blog/OnlineChessTeacher/how-to-make-a-plan-in-the-chess-middlegame","kind":"practitioner","page":"How to Make a Plan in the Chess Middlegame","quote":"A plan connects your next move to the needs of the position.","work":"chess-com-naeem-middlegame-plan"},{"label":"Waleed Naeem, How to Make a Plan in the Chess Middlegame","url":"https://www.chess.com/blog/OnlineChessTeacher/how-to-make-a-plan-in-the-chess-middlegame","kind":"practitioner","page":"Begin With the Opponent's Threat","quote":"Before planning, identify checks, captures, pawn breaks, and pieces that may invade. A plan that ignores the opponent is only a wish.","work":"chess-com-naeem-middlegame-plan"},{"label":"Waleed Naeem, How to Make a Plan in the Chess Middlegame","url":"https://www.chess.com/blog/OnlineChessTeacher/how-to-make-a-plan-in-the-chess-middlegame","kind":"practitioner","page":"Create a Short Plan","quote":"A useful plan may be only two or three moves: double rooks, improve a knight, and prepare a break. Re-evaluate after every opponent move.","work":"chess-com-naeem-middlegame-plan"}],"id":"plan","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Prophylaxis","aka":["preventive play","prevention"],"kind":"concept","plain":"Strategic prevention: foresee the opponent's useful resources and restrict them before they become threats, while improving your own position.","does":"Cuts counterplay by taking away freeing breaks, good squares, favorable exchanges, space, or active piece routes.","ask":"What would the opponent improve or free next, and can I prevent it without giving up my own progress?","range":"Elementary prevention; prevention of tactical threats; prevention of strategic threats.","trouble":"Allowing a freeing pawn move, an active piece route, a favorable exchange, or too much space when it could have been restricted.","at":[-0.3,0.42,0.04],"links":[{"to":"initiative","rel":"controls"},{"to":"king-safety","rel":"lowers"}],"sources":[{"label":"Efstratios Grivas, Strategic prevention","url":"https://en.chessbase.com/post/strategic-prevention","kind":"practitioner","page":"Strategic Prevention","quote":"He used to say: 'Neither attack, nor defence, is the essence of positional play, but prophylaxis'.","work":"chessbase-strategic-prevention"},{"label":"Efstratios Grivas, Strategic prevention","url":"https://en.chessbase.com/post/strategic-prevention","kind":"practitioner","page":"Strategic Prevention","quote":"Foreseeing and preventing strategic threats.","work":"chessbase-strategic-prevention"}],"id":"prophylaxis","feel":{"shape":0.55,"energy":0.42,"weight":0.3,"warmth":0.28,"grain":0.5,"motion":"settle","why":"Prophylaxis feels like a cool, textured barrier that settles over the opponent's useful routes before they become threats."}},{"term":"Worst piece","aka":["worst-placed piece","least useful piece"],"kind":"concept","plain":"The piece contributing least to the position. Improving its route, target, or defensive role often improves the whole army at once.","does":"Provides a practical quiet-move test when no forcing move dominates, and exposes whether a piece should improve or be exchanged.","ask":"Which of my pieces contributes least, and what useful square, route, target, or defensive job can it gain?","range":"Least useful piece; useful route; useful target; defensive role; exchange candidate.","trouble":"The same piece remains idle while the opponent improves, or a slow improvement ignores an urgent threat.","at":[0,0.42,0.04],"links":[{"to":"piece-activity","rel":"see also"},{"to":"exchanges","rel":"controls"}],"sources":[{"label":"Max Illingworth, How To Play Positional Chess","url":"https://www.chess.com/article/view/how-to-play-positional-chess","kind":"practitioner","page":"What exactly is positional chess?","quote":"Harmoniously coordinating our pieces toward common goals (especially by improving the worst-placed piece)","work":"chess-com-illingworth-positional-chess"},{"label":"Max Illingworth, How To Play Positional Chess","url":"https://www.chess.com/article/view/how-to-play-positional-chess","kind":"practitioner","page":"What lessons can we take away from this game?","quote":"If direct moves aren't working for you, look for a way to improve your worst-placed piece.","work":"chess-com-illingworth-positional-chess"}],"id":"worst-piece","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"King attack","aka":["attack on the king","attacking the castled king"],"kind":"concept","plain":"A coordinated attempt to expose or overwhelm the enemy king with pieces, open lines, pawn advances, or a sacrifice.","does":"Converts a king-safety imbalance into forcing threats; it needs enough attacking pieces, open lines, and time to continue.","ask":"Can I open a line or remove a defender faster than the king can find shelter or counterplay?","cues":["Attacking pieces around the enemy king","Open lines toward the king","Pawn advances on a flank","Bishop sacrifice exposing the king"],"range":"Direct piece attack; pawn storm; Greek Gift sacrifice; same-side or opposite-side pressure.","trouble":"The attack lacks follow-up, a defender arrives, or an ill-prepared pawn storm creates weaknesses around the attacker's own king.","at":[0.34,0.42,0.04],"links":[{"to":"king-safety","rel":"raises"},{"to":"initiative","rel":"raises"}],"variants":[{"label":"Named attacks","items":[{"id":"attack-greek-gift","name":"Greek Gift","plain":"Sacrifice a bishop on h7 or h2 to expose the enemy king and begin a supported attack.","sources":[{"label":"Chess.com, Greek Gift","url":"https://www.chess.com/terms/greek-gift-chess","kind":"reference","page":"What Is The Greek Gift?","quote":"In chess, the Greek Gift is a common sacrifice designed to expose the enemy king and start a devastating attack.","work":"chess-com-greek-gift"}],"svg":{"board":""}},{"id":"attack-pawn-storm","name":"Pawn storm","plain":"Advance connected pawns repeatedly, usually on a flank, to open lines and attack the opponent.","sources":[{"label":"Chess.com, Pawn Storm","url":"https://www.chess.com/terms/chess-pawn-storm","kind":"reference","page":"What Is A Pawn Storm In Chess?","quote":"A pawn storm happens in chess when a player moves connected pawns multiple times in rapid succession to attack the opponent.","work":"chess-com-pawn-storm"},{"label":"Chess.com, Pawn Storm","url":"https://www.chess.com/terms/chess-pawn-storm","kind":"reference","page":"Why Is The Pawn Storm Important?","quote":"As you can see, pawn storms can be devastating. However, it is imperative to understand that advancing your pawns too far can backfire.","work":"chess-com-pawn-storm"}],"svg":{"board":""}}]}],"sources":[{"label":"Chess.com, Greek Gift","url":"https://www.chess.com/terms/greek-gift-chess","kind":"reference","page":"What Is The Greek Gift?","quote":"Why would a player trade a bishop for a single pawn? As explained, this sacrifice exposes the enemy king and allows for a ferocious attack to start.","work":"chess-com-greek-gift"},{"label":"Chess.com, Pawn Storm","url":"https://www.chess.com/terms/chess-pawn-storm","kind":"reference","page":"Why Is The Pawn Storm Important?","quote":"A well-executed pawn storm can open lines for an attack on the king.","work":"chess-com-pawn-storm"}],"id":"king-attack","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Exchanges","aka":["trades","simplification"],"kind":"concept","plain":"A capture or trade that changes which pieces, lines, pawn structure, king-safety resources, and endgame remain.","does":"Removes defenders or attackers, changes the structure and open lines, and chooses whether the resulting position favors one side.","ask":"After the recapture, whose pieces, king, structure, and endgame become easier to play?","cues":["Capture or trade on the board","Defenders or attackers removed","Pawn structure and open lines changed"],"range":"Piece exchange; pawn exchange; queen exchange; favorable or unfavorable simplification.","trouble":"A trade is made because it is available or simpler, but it activates an enemy piece, releases a cramped position, damages the structure, or enters a bad ending.","at":[0.68,0.42,0.04],"links":[{"to":"material","rel":"see also"},{"to":"king-safety","rel":"controls"},{"to":"space","rel":"controls"}],"sources":[{"label":"Waleed Naeem, When to Trade Pieces in Chess: 7 Questions Before You Exchange","url":"https://www.chess.com/blog/OnlineChessTeacher/when-to-trade-pieces-in-chess-7-questions-before-you-exchange","kind":"practitioner","page":"When to Trade Pieces in Chess: 7 Questions Before You Exchange","quote":"An exchange is not just the disappearance of two pieces. It changes open lines, pawn structure, king safety, weak squares, and the roles of every surviving piece.","work":"chess-com-naeem-exchanges"},{"label":"Waleed Naeem, When to Trade Pieces in Chess: 7 Questions Before You Exchange","url":"https://www.chess.com/blog/OnlineChessTeacher/when-to-trade-pieces-in-chess-7-questions-before-you-exchange","kind":"practitioner","page":"Three Exchanges That Often Help","quote":"Good exchanges are purposeful. They remove defenders, improve structures, reduce counterplay, or guide the game toward a favorable ending.","work":"chess-com-naeem-exchanges"}],"id":"exchanges","feel":{"shape":0.52,"energy":0.46,"weight":0.1,"warmth":0.45,"grain":0.3,"motion":"pulse","why":"An exchange feels like a measured pulse that removes two forces and reveals a new balance of lines, structure, and king safety."}},{"term":"Tactics","aka":["concrete combinations","tactical play"],"kind":"part","plain":"Tactics are short, concrete sequences in which a forcing idea changes the material, king safety, or result. The recurring shapes are named so a player can recognise the underlying configuration rather than re-derive it from scratch.","does":"Turns a position's immediate features—checks, captures, threats, loose defenders, and mating nets—into a forcing result.","ask":"Which forcing sequence works now, and what is the opponent's best reply?","cues":["Checks, captures and threats","Loose defenders","Mating nets","Material or king safety changing in a short sequence"],"children":["forcing-moves","tactical-motif","mating-pattern"],"links":[{"to":"calculation","rel":"controls"},{"to":"pattern-chunking","rel":"see also"}],"sources":[{"label":"Bryan Smith, Forcing Moves, Part 1","url":"https://www.chess.com/article/view/forcing-moves-part-1","kind":"practitioner","page":"article","quote":"Essentially, a forcing move is either a check, a capture, or a threat.","work":"chesscom-forcing-moves-part-1"},{"label":"FIDE, Curriculum Chess for Refugees","url":"https://www.fide.com/docs/presentations/Curriculum%20Chess%20for%20Refugees.pdf","kind":"standard","page":"p. 115","quote":"Now we enter the field of combinations, where we apply everything, we have learned so far and give room to our own creativity. We will learn some simple tactics and how they work together. Let's have fun!","work":"fide-chess-for-refugees-curriculum"}],"id":"tactics","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Forcing moves","aka":["checks, captures, threats","forcing sequence"],"kind":"process","plain":"A forcing move sharply limits the opponent's useful replies: begin with checks, then captures, then concrete threats. It is a search order, not a guarantee that every forcing move is sound.","does":"Shrinks the reply tree so tactical opportunities and defensive resources can be calculated first.","ask":"What checks, captures, or concrete threats does each side have right now?","cues":["Check on the king","Capture of a piece or pawn","Concrete threat requiring a reply"],"range":"Checks; captures; direct threats, in that practical order.","trouble":"A player treats a forcing-looking move as automatically good and misses the opponent's stronger forcing reply.","children":[],"at":[-0.34,0.16,0.02],"pattern":"pattern-build-test-learn","links":[{"to":"candidate-moves","rel":"raises"},{"to":"tactical-motif","rel":"controls"}],"sources":[{"label":"Bryan Smith, Forcing Moves, Part 1","url":"https://www.chess.com/article/view/forcing-moves-part-1","kind":"practitioner","page":"article","quote":"Essentially, a forcing move is either a check, a capture, or a threat.","work":"chesscom-forcing-moves-part-1"},{"label":"Bryan Smith, Forcing Moves, Part 1","url":"https://www.chess.com/article/view/forcing-moves-part-1","kind":"practitioner","page":"article","quote":"When we calculate variations, we should always pay attention – and calculate first – the forcing moves.","work":"chesscom-forcing-moves-part-1"}],"id":"forcing-moves","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Tactical motif","aka":["named tactic","tactical theme"],"kind":"concept","plain":"A tactical motif is the reusable relation that makes a combination work: a fork, pin, skewer, discovered attack, double check, overloaded defender, or removal of a defender. The name is a retrieval handle for the board geometry, not a substitute for checking legality and replies.","does":"Lets a player recognise a concrete relation quickly and choose a forcing continuation.","ask":"Which named relation is present, and what changes when the defender moves or is removed?","cues":["Fork, pin or skewer","Discovered attack or double check","Overloaded defender","Defender removed from a relation"],"trouble":"The label is noticed but the exact geometry, king safety, or final material is not checked.","at":[0,0,0.04],"pattern":"pattern-chunking","links":[{"to":"chunk","rel":"made by"},{"to":"forcing-moves","rel":"made by"},{"to":"mating-pattern","rel":"see also"}],"sources":[{"label":"FIDE, Curriculum Chess for Refugees","url":"https://www.fide.com/docs/presentations/Curriculum%20Chess%20for%20Refugees.pdf","kind":"standard","page":"pp. 115–116","quote":"What is a so-called skewer? A skewer is somehow a reversed pin. The difference is that the most valuable piece is under direct attack","work":"fide-chess-for-refugees-curriculum"},{"label":"FIDE, Curriculum Chess for Refugees","url":"https://www.fide.com/docs/presentations/Curriculum%20Chess%20for%20Refugees.pdf","kind":"standard","page":"p. 118","quote":"After a double check, the king must always move.","work":"fide-chess-for-refugees-curriculum"},{"label":"FIDE, Curriculum Chess for Refugees","url":"https://www.fide.com/docs/presentations/Curriculum%20Chess%20for%20Refugees.pdf","kind":"standard","page":"p. 119","quote":"Another way of winning a piece: Remove the defender!","work":"fide-chess-for-refugees-curriculum"},{"label":"Murray Chandler, How to Beat Your Dad at Chess","url":"https://openlibrary.org/books/OL35385047M/How_to_Beat_Your_Dad_at_Chess","kind":"book","isbn":"1901983056","page":"tactical and mating pattern collection","flag":"book text not opened in this pass","work":"murray-chandler-how-to-beat-your-dad-at-chess"}],"id":"tactical-motif","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Mating pattern","aka":["checkmate pattern","mating net"],"kind":"concept","plain":"A mating pattern is a recurring arrangement that leaves the checked king with no legal escape, capture, or interposition. Typical patterns include back-rank mates, smothered mates, corridor mates, and the basic king-and-rook or king-and-queen finishes.","does":"Gives a player a concrete picture of the final mating net and the defensive squares that must be removed or covered.","ask":"Which escape squares, checking piece, and support piece make the mate legal?","cues":["Checked king with no escape","Checking piece and support piece","Back-rank, smothered or corridor arrangement"],"trouble":"The attacker sees a familiar picture but allows stalemate, an interposition, or a king capture.","at":[0.34,0.16,0.02],"pattern":"pattern-chunking","links":[{"to":"tactical-motif","rel":"see also"},{"to":"chunk","rel":"made by"}],"sources":[{"label":"FIDE, Curriculum Chess for Refugees","url":"https://www.fide.com/docs/presentations/Curriculum%20Chess%20for%20Refugees.pdf","kind":"standard","page":"p. 110","quote":"The students learn to mate their opponents with rook and king using the step-by-step method of systematically pushing the enemy king to the edge of the board where it will be mated.","work":"fide-chess-for-refugees-curriculum"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 1.4.1","quote":"The player who achieves this goal is said to have ‘checkmated’ the opponent’s king and to have won the game.","work":"fide-laws-of-chess"}],"id":"mating-pattern","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Calculation","aka":["calculating variations","concrete analysis"],"kind":"part","plain":"Calculation is the disciplined search through candidate moves and the opponent's replies until the position becomes quiet enough to evaluate. It is not a promise to see everything; it is a controlled comparison of forcing lines and defensive resources.","does":"Converts a position into a finite decision by narrowing replies, visualising resulting positions, and checking the opponent's strongest resource.","ask":"Which candidates survive the strongest reply, and where does the variation become clear?","children":["candidate-moves","variation","blunder-check"],"links":[{"to":"tactics","rel":"made by"},{"to":"chess-engine","rel":"see also"},{"to":"pattern-build-test-learn","rel":"see also"}],"sources":[{"label":"Bryan Smith, Forcing Moves, Part 1","url":"https://www.chess.com/article/view/forcing-moves-part-1","kind":"practitioner","page":"article","quote":"When we calculate variations, we should always pay attention – and calculate first – the forcing moves.","work":"chesscom-forcing-moves-part-1"}],"id":"calculation","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Candidate moves","aka":["shortlist","serious candidates"],"kind":"process","plain":"Candidate moves are the small shortlist worth calculating in a critical position. Start with forcing moves, then add a necessary defence or a strong positional move; compare the resulting positions instead of choosing from the whole legal move list.","does":"Makes calculation finite and prevents an attractive first idea from becoming an untested decision.","ask":"Which two or three moves deserve a concrete line, and what opponent reply tests each one?","range":"Usually a short list; the position decides whether defence or a quiet move belongs beside forcing moves.","trouble":"A player calculates one favourite move, or generates so many moves that no line is checked fully.","at":[-0.34,0,0.04],"pattern":"pattern-build-test-learn","links":[{"to":"forcing-moves","rel":"made by"},{"to":"variation","rel":"controls"}],"sources":[{"label":"Bryan Smith, Forcing Moves, Part 1","url":"https://www.chess.com/article/view/forcing-moves-part-1","kind":"practitioner","page":"article","quote":"It should not be a very hard task, since there are only two candidate moves, and the opponent has a very limited response after each of them","work":"chesscom-forcing-moves-part-1"},{"label":"Bryan Smith, Forcing Moves, Part 1","url":"https://www.chess.com/article/view/forcing-moves-part-1","kind":"practitioner","page":"article","quote":"It is pure calculation that allows a chess player to decide between these two moves.","work":"chesscom-forcing-moves-part-1"}],"id":"candidate-moves","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Variation","aka":["calculated line","move tree"],"kind":"process","plain":"A variation is one candidate move followed by the opponent's best replies and the player's continuations, ending when the position can be evaluated or a forcing result is reached. Keep the board state, move order, and side to move explicit.","does":"Exposes refutations and winning continuations before a move is committed.","ask":"What is the opponent's strongest forcing reply, and what position remains after the line?","range":"From a single reply to a branching tree; stop at a stable position or a forced result.","trouble":"A line is extended past the useful point while a forcing reply, changed defender, or move-order issue is forgotten.","at":[0,0,0.04],"pattern":"pattern-build-test-learn","links":[{"to":"calculation","rel":"made by"},{"to":"blunder-check","rel":"raises"}],"sources":[{"label":"Bryan Smith, Forcing Moves, Part 1","url":"https://www.chess.com/article/view/forcing-moves-part-1","kind":"practitioner","page":"article","quote":"When we calculate variations, we should always pay attention – and calculate first – the forcing moves.","work":"chesscom-forcing-moves-part-1"},{"label":"Bryan Smith, Forcing Moves, Part 1","url":"https://www.chess.com/article/view/forcing-moves-part-1","kind":"practitioner","page":"article","quote":"It is pure calculation that allows a chess player to decide between these two moves.","work":"chesscom-forcing-moves-part-1"}],"id":"variation","look":{"parts":[{"slot":"board","shape":"box","size":[0.9,0.06,0.7],"pos":[0,0,0],"material":"matte","color":"#31414f"},{"slot":"root","shape":"sphere","radius":0.06,"pos":[0,0.14,0],"material":"glow","color":"#f0c45b"},{"slot":"line-one","shape":"cylinder","radiusTop":0.011,"radiusBottom":0.011,"height":0.3,"pos":[-0.14,0.23,0],"rot":[0,0,-45],"material":"glow","color":"#e8755f"},{"slot":"line-two","shape":"cylinder","radiusTop":0.011,"radiusBottom":0.011,"height":0.3,"pos":[0.14,0.23,0],"rot":[0,0,45],"material":"glow","color":"#68c4b0"},{"slot":"reply","shape":"sphere","radius":0.045,"pos":[0,0.34,0],"material":"glow","color":"#f6f0df"}]}},{"term":"Blunder check","aka":["final safety scan","pre-move check"],"kind":"process","plain":"A blunder check is the last deliberate scan after choosing a move: re-read the opponent's checks, captures, threats, loose pieces, opened lines, and tactical counters in the resulting position. It is separate from the deeper line that produced the candidate.","does":"Catches the one-move refutation that survives an otherwise plausible calculation.","ask":"After my intended move, what is the opponent's strongest check, capture, or threat?","trouble":"The player stops at the attractive endpoint of a line and never tests the actual position after the intended move.","at":[0.34,0,0.04],"pattern":"pattern-braking-engine","links":[{"to":"variation","rel":"controls"},{"to":"game-analysis","rel":"measured by"}],"sources":[{"label":"Bryan Smith, Forcing Moves, Part 1","url":"https://www.chess.com/article/view/forcing-moves-part-1","kind":"practitioner","page":"article","quote":"Assumptions are your enemy when calculating.","work":"chesscom-forcing-moves-part-1"}],"id":"blunder-check","look":{"parts":[{"slot":"board","shape":"box","size":[0.9,0.06,0.7],"pos":[0,0,0],"material":"matte","color":"#4a3540"},{"slot":"move","shape":"box","size":[0.16,0.12,0.16],"pos":[-0.16,0.15,0],"material":"gloss","color":"#f0c45b"},{"slot":"scan","shape":"torus","radius":0.19,"tube":0.025,"pos":[0.2,0.2,0],"rot":[90,0,0],"material":"glow","color":"#68c4b0"},{"slot":"handle","shape":"cylinder","radiusTop":0.025,"radiusBottom":0.025,"height":0.22,"pos":[0.34,0.12,0],"rot":[0,0,45],"material":"glow","color":"#68c4b0"}]}},{"term":"Endgame","aka":["ending","final phase"],"kind":"part","plain":"The endgame is the phase where reduced material makes king routes, pawn races, and exact positions decisive. General plans still matter, but known positions and concrete calculation often determine whether an advantage converts or a draw holds.","does":"Converts a material or positional edge into promotion, checkmate, or a defensible draw through precise technique.","ask":"Which king route, pawn break, exchange, or known position fixes the result?","cues":["Reduced material","King routes and key squares","Pawn races"],"children":["king-activity","passed-pawn","opposition","theoretical-position","tablebase"],"links":[{"to":"calculation","rel":"controls"},{"to":"pattern-chunking","rel":"see also"}],"sources":[{"label":"Daniel Rensch, Chess Endgames: 10 Principles for Beginners","url":"https://www.chess.com/article/view/chess-endgames","kind":"practitioner","page":"article, introduction","quote":"knowing what to do in the final stage is just as important as anything else.","work":"chesscom-endgames-10-principles"},{"label":"Daniel Rensch, Chess Endgames: 10 Principles for Beginners","url":"https://www.chess.com/article/view/chess-endgames","kind":"practitioner","page":"Rule #9","quote":"Unlike any other ‘phase’ to chess, the endgame requires more knowledge of specific positions and patterns.","work":"chesscom-endgames-10-principles"}],"id":"endgame","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"King activity","aka":["active king","king route"],"kind":"process","plain":"King activity is the deliberate use of the king as an endgame piece: approach pawns, occupy key squares, support a passer, or cut off the enemy king. The king should remain safe while the position still contains tactical mating or checking danger.","does":"Converts king proximity and tempo into opposition, pawn support, blockade, or promotion gains.","ask":"When is the king safe to activate, and which route reaches the decisive square first?","cues":["King approaching pawns","King on a key square","King supporting a passer","Enemy king cut off"],"trouble":"The king enters too late, or walks into checks and tactics before the position is ready.","at":[-0.38,0.18,0.03],"pattern":"pattern-chunking","links":[{"to":"opposition","rel":"raises"},{"to":"passed-pawn","rel":"controls"},{"to":"theoretical-position","rel":"see also"}],"sources":[{"label":"Daniel Rensch, Chess Endgames: 10 Principles for Beginners","url":"https://www.chess.com/article/view/chess-endgames","kind":"practitioner","page":"Rule #4","quote":"Generally, as soon as the Queen's have been traded you should consider the possibility of bringing out your King.","work":"chesscom-endgames-10-principles"},{"label":"Daniel Rensch, Chess Endgames: 10 Principles for Beginners","url":"https://www.chess.com/article/view/chess-endgames","kind":"practitioner","page":"Rule #4","quote":"In the Middlegame the King is a mere extra, but in the Endgame he is a principal","work":"chesscom-endgames-10-principles"}],"id":"king-activity","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Passed pawn","aka":["pawn passer","advancing passer"],"kind":"process","plain":"A passed pawn has no opposing pawn able to stop it by a direct capture on its file or an adjacent file. Its practical value comes from the race to promotion, the squares it controls, and the pieces the opponent must tie down to blockade it.","does":"Creates a concrete promotion threat that can win material, distract defenders, or force a king route.","ask":"Can the passer advance safely, be supported, or be used to create a second weakness before the opponent blockades it?","cues":["No opposing pawn on the file or adjacent file","Pawn race to promotion","Controlled squares ahead","Pieces tied to a blockade"],"trouble":"The passer is pushed without calculating checks, blockades, promotion choices, or the opponent's counterplay.","at":[0,-0.02,0.04],"pattern":"pattern-chunking","links":[{"to":"king-activity","rel":"controls"},{"to":"theoretical-position","rel":"see also"},{"to":"tablebase","rel":"measured by"}],"sources":[{"label":"Daniel Rensch, Chess Endgames: 10 Principles for Beginners","url":"https://www.chess.com/article/view/chess-endgames","kind":"practitioner","page":"Rule #3","quote":"Recognize a passed pawn, and push it!","work":"chesscom-endgames-10-principles"},{"label":"Daniel Rensch, Chess Endgames: 10 Principles for Beginners","url":"https://www.chess.com/article/view/chess-endgames","kind":"practitioner","page":"Rule #3","quote":"you must push your passed pawns!","work":"chesscom-endgames-10-principles"}],"id":"passed-pawn","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Opposition","aka":["king opposition","direct opposition"],"kind":"concept","plain":"Opposition is the king-to-king geometry in which the kings face one another with an odd number of squares between them; direct opposition has one square. Because a player must move, the side that can hand the move back or force the other king away may reach the key square.","does":"Controls king entry and tempo in pawn endings and other reduced-material positions.","ask":"Who has the move, which king can take the opposition, and what happens after the forced king step?","cues":["Kings facing one another","Odd number of squares between the kings"],"trouble":"The player remembers “opposition” without counting squares, accounting for diagonal or distant forms, or checking pawn tempos.","at":[0.38,0.18,0.03],"pattern":"pattern-chunking","links":[{"to":"king-activity","rel":"made by"},{"to":"theoretical-position","rel":"see also"}],"sources":[{"label":"FIDE, Curriculum Chess for Refugees","url":"https://www.fide.com/docs/presentations/Curriculum%20Chess%20for%20Refugees.pdf","kind":"standard","page":"p. 112","quote":"Here you can see an opposition: The kings face each other with one square between them. We speak about opposition when the amount of squares between the kings is odd.","work":"fide-chess-for-refugees-curriculum"}],"id":"opposition","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Theoretical position","aka":["known endgame position","table position"],"kind":"concept","plain":"A theoretical position is a reduced-material arrangement whose result or method is known from endgame theory, such as a king-and-pawn key-square position, a basic rook ending, or a standard mating finish. It is a pattern to verify and understand, not a shortcut around legal calculation.","does":"Supplies a tested reference point for deciding whether to simplify, seek a win, hold a draw, or calculate a race exactly.","ask":"Does this position match a known win, draw, or loss, and what is the human plan behind the verdict?","cues":["Reduced-material arrangement","King-and-pawn key-square position","Basic rook ending","Standard mating finish"],"trouble":"A remembered rule is applied to a changed move order, pawn file, king square, or 50-move context.","at":[0,0.36,0.03],"pattern":"pattern-chunking","links":[{"to":"tablebase","rel":"measured by"},{"to":"passed-pawn","rel":"see also"},{"to":"opposition","rel":"see also"}],"sources":[{"label":"Daniel Rensch, Chess Endgames: 10 Principles for Beginners","url":"https://www.chess.com/article/view/chess-endgames","kind":"practitioner","page":"Rule #9","quote":"What if you realized that in the majority of the endgames you play, the result is likely already decided or forced if the best moves are played by both sides?","work":"chesscom-endgames-10-principles"},{"label":"Daniel Rensch, Chess Endgames: 10 Principles for Beginners","url":"https://www.chess.com/article/view/chess-endgames","kind":"practitioner","page":"Rule","quote":"the endgame requires more knowledge of specific positions and patterns.","work":"chesscom-endgames-10-principles"}],"id":"theoretical-position","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Tablebase","aka":["endgame oracle","exact endgame lookup"],"kind":"measure","plain":"A tablebase is a lookup service for supported low-material positions. It returns an objective category and ordered legal moves, while the human study task is to explain the king route, pawn race, or defensive resource that makes the result hold.","does":"Checks a theoretical position's exact result and candidate moves without pretending that the lookup itself teaches the underlying idea.","ask":"What category and best move does the tablebase return, and what human pattern explains it?","cues":["Low-material position entered","Objective category returned","Ordered legal moves shown","50-move rule status"],"range":"Standard-chess positions covered by the service; the API also reports whether the 50-move rule changes certainty.","trouble":"A tablebase verdict is treated as a general middlegame evaluation, or a cursed/blessed result is mistaken for an ordinary win or loss.","at":[0.38,0.36,0.03],"pattern":"pattern-braking-engine","links":[{"to":"theoretical-position","rel":"measured by"},{"to":"chess-engine","rel":"see also"}],"unverified":"The cited tablebase API page did not expose stable text to the verifier; the node describes the API fields conservatively.","id":"tablebase","look":{"parts":[{"slot":"query","shape":"box","size":[0.8,0.09,0.56],"pos":[0,0,0],"material":"screen","color":"#202a35"},{"slot":"win","shape":"box","size":[0.18,0.04,0.14],"pos":[-0.25,0.1,0],"material":"glow","color":"#68c4b0"},{"slot":"draw","shape":"box","size":[0.18,0.04,0.14],"pos":[0,0.1,0],"material":"glow","color":"#f0c45b"},{"slot":"loss","shape":"box","size":[0.18,0.04,0.14],"pos":[0.25,0.1,0],"material":"glow","color":"#e8755f"}]}},{"term":"Chess clock","aka":["clock","game clock"],"kind":"part","plain":"A chess clock is two linked time displays, only one of which runs at a time; after moving, a player presses it to complete the move and start the opponent's clock.","does":"Makes thinking time a competitive resource and a formal condition of the game.","ask":"Whose clock is running, and when is this move completed?","cues":["Two linked time displays","One display running","Clock pressed after a move","Flag on a display"],"children":["time-control","time-management","time-trouble"],"at":[0,0.06,0],"sources":[{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 6.1","quote":"‘Chessclock’ means a clock with two time displays, connected to each other in such a way that only one of them can run at a time. ‘Clock’ in the Laws of Chess means one of the two time displays. Each time display has a ‘flag’.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 6.2.1","quote":"During the game each player, having made his/her move on the chessboard, shall pause his/her own clock and start his/her opponent’s clock (that is to say, he/she shall press his/her clock). This ‘completes’ the move.","work":"fide-laws-of-chess"},{"label":"Chess.com Team, Chess Clocks: An Introduction","url":"https://www.chess.com/article/view/an-introduction-to-chess-clocks","kind":"reference","page":"Chess Clocks: An Introduction","quote":"Just one of the two clocks runs at a time, with players starting their opponent's clock (and pausing their own) by pressing a button after making each move.","work":"chesscom-chess-clocks"}],"id":"clock","look":{"parts":[{"slot":"clock-body","shape":"box","size":[1.18,0.38,0.18],"pos":[0,0.16,0.14],"material":"matte","color":"#272727"},{"slot":"white-display","shape":"plane","size":[0.42,0.19],"pos":[-0.28,0.17,0.24],"material":"screen","color":"#b7d3b2","svg":""},{"slot":"black-display","shape":"plane","size":[0.42,0.19],"pos":[0.28,0.17,0.24],"material":"screen","color":"#b7d3b2","svg":""},{"slot":"button","shape":"box","size":[0.16,0.08,0.08],"pos":[-0.28,0.48,0.16],"material":"gloss","color":"#d9b24c"},{"slot":"button-2","shape":"box","size":[0.16,0.08,0.08],"pos":[0.28,0.48,0.16],"material":"gloss","color":"#d9b24c"}]}},{"term":"Time control","aka":["time setting","base time and increment"],"kind":"knob","plain":"A time control specifies how much time a player has for a move quota or period, including any increment added with each move.","does":"Sets the clock budget, the phases of a timed game, and when a flag can decide the result.","ask":"How much base time, how many moves, and what increment or next period apply?","cues":["Base time on the clock","Move quota or period","Increment after a move","Flag condition"],"range":["rapid","blitz","bullet"],"at":[-0.28,-0.06,0.03],"sources":[{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 6.3.1","quote":"When using a chessclock, each player must complete a minimum number of moves or all moves in an allotted period of time including any additional amount of time added with each move. All these must be specified in advance.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Appendix A.1","quote":"A ‘Rapid chess’ game is one where either all the moves must be completed in a fixed time of more than 10 minutes but less than 60 minutes for each player; or the time allotted plus 60 times any increment is of more than 10 minutes but less than 60 minutes for each player.","work":"fide-laws-of-chess"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Appendix B.1","quote":"A ‘blitz’ game is one where all the moves must be completed in a fixed time of 10 minutes or less for each player; or the allotted time plus 60 times any increment is 10 minutes or less for each player.","work":"fide-laws-of-chess"},{"label":"Chess.com Team, Chess Clocks: An Introduction","url":"https://www.chess.com/article/view/an-introduction-to-chess-clocks","kind":"reference","page":"What is a time control?","quote":"It's how much time a player has to make all the moves in a game.","work":"chesscom-chess-clocks"},{"label":"Chess.com Team, Chess Clocks: An Introduction","url":"https://www.chess.com/article/view/an-introduction-to-chess-clocks","kind":"reference","page":"Bullet","quote":"Bullet games are the fastest! We define bullet games as those where each player gets less than three minutes total time in a 40-move game.","work":"chesscom-chess-clocks"},{"label":"Chess.com Team, Chess Clocks: An Introduction","url":"https://www.chess.com/article/view/an-introduction-to-chess-clocks","kind":"reference","page":"What is a time control?","quote":"This is usually written as [base time] | [increment].","work":"chesscom-chess-clocks"}],"id":"time-control","look":{"parts":[{"slot":"clock","shape":"box","size":[1.1,0.36,0.16],"pos":[0,0.18,0.12],"material":"matte","color":"#272727"},{"slot":"base-bar","shape":"box","size":[0.7,0.08,0.05],"pos":[-0.12,0.18,0.23],"material":"glow","color":"#5a9ec8"},{"slot":"increment-bar","shape":"box","size":[0.3,0.08,0.05],"pos":[0.38,0.18,0.23],"material":"glow","color":"#d9b24c"},{"slot":"flag","shape":"cone","radius":0.1,"height":0.2,"pos":[0.5,0.45,0.14],"material":"glow","color":"#d63d3d"}]}},{"term":"Time management","aka":["allocating thinking time","clock discipline"],"kind":"process","plain":"Time management allocates the clock unevenly: spend longer when a position is critical and move efficiently when it is routine.","does":"Balances speed against accuracy so the player can keep making legal, useful decisions through the later phases of the game.","ask":"Has the position become critical enough to spend time, or is a safe routine move available?","cues":["Longer think in a critical position","Efficient move in a routine position","Clock budget carried into later phases"],"at":[0,-0.18,0.04],"links":[{"to":"time-trouble","rel":"lowers"}],"sources":[{"label":"Daniel Naroditsky, The Art Of Time Management","url":"https://www.chess.com/article/view/the-art-of-time-management","kind":"practitioner","page":"Principle 2: Follow the 15-second rule","quote":"In general, you should only spend 15 seconds or more on a particular move when you believe that a critical position has been reached.","work":"daniel-naroditsky-art-of-time-management"},{"label":"Daniel Naroditsky, The Art Of Time Management","url":"https://www.chess.com/article/view/the-art-of-time-management","kind":"practitioner","page":"Time management principles","quote":"But time management is an art itself.","work":"daniel-naroditsky-art-of-time-management"}],"id":"time-management","look":{"parts":[{"slot":"clock","shape":"box","size":[0.82,0.28,0.12],"pos":[0,0.2,0.12],"material":"matte","color":"#272727"},{"slot":"clock-face","shape":"cylinder","radiusTop":0.22,"radiusBottom":0.22,"height":0.04,"pos":[0,0.2,0.22],"rot":[90,0,0],"material":"gloss","color":"#e6e0c8"},{"slot":"hand","shape":"box","size":[0.04,0.2,0.025],"pos":[0,0.29,0.26],"rot":[0,0,-35],"material":"metal","color":"#b24b3e"},{"slot":"critical-ring","shape":"torus","radius":0.28,"tube":0.025,"pos":[0,0.2,0.23],"rot":[90,0,0],"material":"glow","color":"#d9b24c"}]}},{"term":"Time trouble","aka":["time pressure","zeitnot"],"kind":"concept","plain":"Time trouble is pressure created when the remaining clock is too small for comfortable decisions, so calculation and execution must be compressed before the flag falls.","does":"Turns the clock into an immediate tactical constraint and can decide a game even when the board position is playable.","ask":"What is the simplest legal, safe move before the flag falls?","cues":["Small remaining clock","Flag close while the position remains playable"],"at":[0.28,-0.18,0.04],"sources":[{"label":"Jeremy Silman, The Time-Trouble Blues","url":"https://www.chess.com/article/view/the-time-trouble-blues","kind":"practitioner","page":"Introduction","quote":"Time trouble plagues beginners, strong amateurs, masters, and grandmasters. There is no universal cure.","work":"jeremy-silman-time-trouble-blues"},{"label":"Jeremy Silman, The Time-Trouble Blues","url":"https://www.chess.com/article/view/the-time-trouble-blues","kind":"practitioner","page":"Very Little Pattern Recognition","quote":"The more patterns you master, the stronger you’ll get.","work":"jeremy-silman-time-trouble-blues"},{"label":"FIDE, Laws of Chess (from 1 January 2023)","url":"https://handbook.fide.com/chapter/E012023","kind":"standard","page":"Article 6.9","quote":"Except where one of Articles 5.1.1, 5.1.2, 5.2.1, 5.2.2, 5.2.3 applies, if a player does not complete the prescribed number of moves in the allotted time, the game is lost by that player. However, the game is drawn if the position is such that the opponent cannot checkmate the player’s king by any possible series of legal moves.","work":"fide-laws-of-chess"}],"id":"time-trouble","look":{"parts":[{"slot":"clock","shape":"box","size":[1.02,0.34,0.16],"pos":[0,0.2,0.12],"material":"matte","color":"#272727"},{"slot":"display","shape":"plane","size":[0.72,0.18],"pos":[0,0.2,0.22],"material":"screen","color":"#d63d3d","svg":""},{"slot":"warning","shape":"torus","radius":0.25,"tube":0.035,"pos":[0,0.2,0.25],"rot":[90,0,0],"material":"glow","color":"#d63d3d"},{"slot":"flag","shape":"cone","radius":0.1,"height":0.22,"pos":[0.48,0.46,0.14],"material":"glow","color":"#d63d3d"}]}},{"term":"Improvement","aka":["chess training","getting stronger"],"kind":"part","plain":"Improvement is a feedback practice: name the recurring position or decision, study it actively, test the idea in play, and review what happened. The catalogue is useful because it turns vague experience into revisitable patterns and measurable habits, not because a list by itself creates expertise.","does":"Turns games, puzzles, master examples, and measured results into the next training target.","ask":"Which recurring pattern or decision failed, what evidence would test it, and what will be practised next?","children":["chunk","pattern-catalogue","puzzle-training","master-game-study","game-analysis","chess-engine","rating"],"links":[{"to":"pattern-build-test-learn","rel":"see also"},{"to":"pattern-boosting-engine","rel":"see also"},{"to":"pattern-braking-engine","rel":"see also"}],"sources":[{"label":"Waleed Naeem, Chess and Pattern Recognition: How to Improve Your Skills","url":"https://www.chess.com/blog/OnlineChessTeacher/chess-and-pattern-recognition-how-to-improve-your-skills","kind":"practitioner","page":"article, sections 2–3","quote":"Experience plays a key role in pattern recognition. As you play more games and study more positions, you develop an instinctual understanding of what works and what doesn’t.","work":"chesscom-pattern-recognition"}],"id":"improvement","look":{"parts":[{"slot":"notebook","shape":"box","size":[0.78,0.08,0.95],"pos":[0,0,0],"material":"matte","color":"#b9c6d5"},{"slot":"catalogue","shape":"box","size":[0.56,0.03,0.24],"pos":[0,0.08,0.1],"material":"screen","color":"#263b57"},{"slot":"practice","shape":"torus","radius":0.14,"tube":0.025,"pos":[-0.25,0.15,-0.12],"material":"glow","color":"#e8755f"},{"slot":"feedback","shape":"torus","radius":0.14,"tube":0.025,"pos":[0.25,0.15,-0.12],"material":"glow","color":"#68c4b0"}]}},{"term":"Chunk","aka":["reusable pattern unit","named configuration"],"kind":"concept","plain":"A chunk is a named, reusable unit of chess knowledge: a tactical relation, mating net, pawn structure, opening setup, piece configuration, or theoretical ending that can be recognised as one meaningful situation. This map treats the requested roughly 50,000 expert chunks as a practical catalogue scope, not an exhaustive census and not a claim that cataloguing alone creates expertise.","does":"Compresses recurring configurations into retrieval handles so calculation can start from a known relation and then verify the concrete position.","ask":"What exactly is the named configuration, what conditions make it work, and where does it stop applying?","cues":["Tactical relation or mating net","Pawn structure or opening setup","Piece configuration","Theoretical ending on the board"],"range":"Roughly 50,000 working entries across pawn structures, tactical motifs, mating patterns, opening systems, piece configurations, and theoretical endgame positions; the number is a planning scale, not a verified count.","trouble":"A label is memorised without its geometry, prerequisites, counterexample, or transfer to a changed position.","at":[-0.36,0,0.05],"pattern":"pattern-chunking","links":[{"to":"pawn-structure","rel":"see also"},{"to":"opening-system","rel":"see also"},{"to":"piece-activity","rel":"see also"},{"to":"tactical-motif","rel":"see also"},{"to":"mating-pattern","rel":"see also"},{"to":"theoretical-position","rel":"see also"},{"to":"pattern-catalogue","rel":"controls"}],"variants":[{"label":"Chess term","items":[{"id":"pawn-structures","name":"Pawn structures","plain":"Recurring pawn formations and their characteristic plans, breaks, weaknesses, and piece routes.","sources":[{"label":"Waleed Naeem, Chess and Pattern Recognition: How to Improve Your Skills","url":"https://www.chess.com/blog/OnlineChessTeacher/chess-and-pattern-recognition-how-to-improve-your-skills","kind":"practitioner","page":"section 6","quote":"Examples include recognizing weak squares, pawn chains, and good outpost squares for knights.","work":"chesscom-pattern-recognition"}],"svg":{"board":""}},{"id":"tactical-motifs","name":"Tactical motifs","plain":"Immediate relations such as forks, pins, skewers, and discovered attacks.","sources":[{"label":"Waleed Naeem, Chess and Pattern Recognition: How to Improve Your Skills","url":"https://www.chess.com/blog/OnlineChessTeacher/chess-and-pattern-recognition-how-to-improve-your-skills","kind":"practitioner","page":"section 4","quote":"Tactical Patterns: Situations involving immediate moves like pins, forks, and skewers.","work":"chesscom-pattern-recognition"}],"svg":{"board":""}},{"id":"mating-patterns","name":"Mating patterns","plain":"Recurring checkmate arrangements and the escape squares that make them legal.","sources":[{"label":"Waleed Naeem, Chess and Pattern Recognition: How to Improve Your Skills","url":"https://www.chess.com/blog/OnlineChessTeacher/chess-and-pattern-recognition-how-to-improve-your-skills","kind":"practitioner","page":"section 8","quote":"Basic Checkmate Patterns: Patterns like king and rook vs. king, king and queen vs. king.","work":"chesscom-pattern-recognition"}],"svg":{"board":""}},{"id":"opening-systems","name":"Opening systems","plain":"Familiar opening setups and move sequences with their development goals and traps.","sources":[{"label":"Waleed Naeem, Chess and Pattern Recognition: How to Improve Your Skills","url":"https://www.chess.com/blog/OnlineChessTeacher/chess-and-pattern-recognition-how-to-improve-your-skills","kind":"practitioner","page":"section 7","quote":"Opening Patterns: Familiar setups and sequences to get your pieces developed safely.","work":"chesscom-pattern-recognition"}],"svg":{"board":""}},{"id":"piece-configurations","name":"Piece configurations","plain":"Recurring piece placements, alignments, outposts, and coordination patterns.","sources":[{"label":"Waleed Naeem, Chess and Pattern Recognition: How to Improve Your Skills","url":"https://www.chess.com/blog/OnlineChessTeacher/chess-and-pattern-recognition-how-to-improve-your-skills","kind":"practitioner","page":"section 6","quote":"Examples include recognizing weak squares, pawn chains, and good outpost squares for knights.","work":"chesscom-pattern-recognition"}],"svg":{"board":""}},{"id":"theoretical-endgame-positions","name":"Theoretical endgame positions","plain":"Reduced-material positions whose familiar king, pawn, or rook geometry points toward a known result.","sources":[{"label":"Waleed Naeem, Chess and Pattern Recognition: How to Improve Your Skills","url":"https://www.chess.com/blog/OnlineChessTeacher/chess-and-pattern-recognition-how-to-improve-your-skills","kind":"practitioner","page":"section 8","quote":"Endgames are often about converting a small advantage, so recognizing common endgame patterns is key to finishing strong.","work":"chesscom-pattern-recognition"}],"svg":{"board":""}}]}],"unverified":"No text of this book is available to check, so neither a quotation nor a verified 50,000-chunk count is available. The count here is an explicit practical catalogue target.","sources":[{"label":"Waleed Naeem, Chess and Pattern Recognition: How to Improve Your Skills","url":"https://www.chess.com/blog/OnlineChessTeacher/chess-and-pattern-recognition-how-to-improve-your-skills","kind":"practitioner","page":"section 1","quote":"Pattern recognition in chess refers to the ability to identify and apply familiar structures, tactics, or positions from previous experience or study.","work":"chesscom-pattern-recognition"},{"label":"Waleed Naeem, Chess and Pattern Recognition: How to Improve Your Skills","url":"https://www.chess.com/blog/OnlineChessTeacher/chess-and-pattern-recognition-how-to-improve-your-skills","kind":"practitioner","page":"section 2","quote":"Recognizing recurring patterns also minimizes blunders, as players can identify familiar threats and respond appropriately.","work":"chesscom-pattern-recognition"}],"id":"chunk","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Pattern catalogue","aka":["pattern index","motif library"],"kind":"part","plain":"A pattern catalogue is an indexed collection of named positions with a diagram, trigger conditions, typical continuation, defensive refutation, and links to related patterns. Its useful unit is a reusable configuration, not a raw count of positions.","does":"Makes a large body of recurring chess knowledge searchable by subject term and comparable across openings, middlegames, tactics, and endings.","ask":"What name, board geometry, prerequisites, counterexample, and neighbouring pattern should this entry record?","range":"Tactical, positional, opening, endgame, mating, and piece-configuration families; expand by subject terms rather than by arbitrary enumeration.","trouble":"The index becomes a list of labels or puzzles with no position, conditions, explanation, or retrieval test.","at":[0,-0.02,0.05],"pattern":"pattern-build-test-learn","links":[{"to":"chunk","rel":"made by"},{"to":"puzzle-training","rel":"controls"},{"to":"pawn-structure","rel":"see also"},{"to":"opening-system","rel":"see also"},{"to":"piece-activity","rel":"see also"}],"unverified":"The opened source names pattern families but does not prescribe a canonical catalogue record; the diagram, trigger, continuation, refutation, and cross-link fields are this map's practical design.","sources":[{"label":"Waleed Naeem, Chess and Pattern Recognition: How to Improve Your Skills","url":"https://www.chess.com/blog/OnlineChessTeacher/chess-and-pattern-recognition-how-to-improve-your-skills","kind":"practitioner","page":"sections 4–8","quote":"Key patterns to focus on include:","work":"chesscom-pattern-recognition"},{"label":"Waleed Naeem, Chess and Pattern Recognition: How to Improve Your Skills","url":"https://www.chess.com/blog/OnlineChessTeacher/chess-and-pattern-recognition-how-to-improve-your-skills","kind":"practitioner","page":"section 4","quote":"Tactical Patterns: Situations involving immediate moves like pins, forks, and skewers.","work":"chesscom-pattern-recognition"},{"label":"Waleed Naeem, Chess and Pattern Recognition: How to Improve Your Skills","url":"https://www.chess.com/blog/OnlineChessTeacher/chess-and-pattern-recognition-how-to-improve-your-skills","kind":"practitioner","page":"section 4","quote":"Endgame Patterns: Positions with a small number of pieces, helping you aim for checkmate or draw conditions.","work":"chesscom-pattern-recognition"}],"id":"pattern-catalogue","look":{"parts":[{"slot":"index","shape":"box","size":[0.82,0.08,0.9],"pos":[0,0,0],"material":"matte","color":"#b9c6d5"},{"slot":"card-one","shape":"box","size":[0.2,0.03,0.22],"pos":[-0.25,0.08,0.18],"material":"screen","color":"#e8755f"},{"slot":"card-two","shape":"box","size":[0.2,0.03,0.22],"pos":[0.25,0.08,0.18],"material":"screen","color":"#68c4b0"},{"slot":"card-three","shape":"box","size":[0.2,0.03,0.22],"pos":[-0.25,0.08,-0.18],"material":"screen","color":"#f0c45b"},{"slot":"card-four","shape":"box","size":[0.2,0.03,0.22],"pos":[0.25,0.08,-0.18],"material":"screen","color":"#8e82c8"}]}},{"term":"Puzzle training","aka":["tactical exercises","solving drills"],"kind":"process","plain":"Puzzle training presents a position, asks for the best continuation, and then requires an explanation of the motif and the failed alternatives. Mix fast recognition with slower calculation, and revisit misses until the pattern is retrievable in a changed position.","does":"Builds a testable bridge from named patterns to concrete move selection and defensive awareness.","ask":"What pattern did the position test, why did the solution work, and what changed in the failed attempt?","cues":["Position shown","Best continuation requested","Motif explanation"],"range":"Basic motifs first, then more complex combinations, positional and endgame patterns, with recurring review of misses.","trouble":"Guessing the first move, memorising a line without the position, or measuring only speed and streaks.","at":[0.36,-0.02,0.05],"pattern":"pattern-boosting-engine","links":[{"to":"tactical-motif","rel":"made by"},{"to":"chunk","rel":"raises"},{"to":"game-analysis","rel":"made by"}],"sources":[{"label":"Waleed Naeem, Chess and Pattern Recognition: How to Improve Your Skills","url":"https://www.chess.com/blog/OnlineChessTeacher/chess-and-pattern-recognition-how-to-improve-your-skills","kind":"practitioner","page":"section 12","quote":"Puzzles expose you to hundreds of different tactical and positional motifs in a short time.","work":"chesscom-pattern-recognition"},{"label":"FIDE, Curriculum Chess for Refugees","url":"https://www.fide.com/docs/presentations/Curriculum%20Chess%20for%20Refugees.pdf","kind":"standard","page":"p. 121","quote":"Try to solve as many as possible puzzles with your students, it will help them to improve their tactical skills.","work":"fide-chess-for-refugees-curriculum"},{"label":"FIDE, Curriculum Chess for Refugees","url":"https://www.fide.com/docs/presentations/Curriculum%20Chess%20for%20Refugees.pdf","kind":"standard","page":"p. 121","quote":"Let the students first think for themselves what move they would suggest. Also consider together how the defender could have had the foresight to avoid the tactical motif.","work":"fide-chess-for-refugees-curriculum"}],"id":"puzzle-training","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.2022222222222223,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1.1222222222222222],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Master-game study","aka":["annotated master game","model-game study"],"kind":"process","plain":"Master-game study is active replay of a strong player's game: pause before critical moves, predict the plan, compare the played move with alternatives, and extract a portable lesson. The point is to connect a model game to one's own positions, not to admire a finished score passively.","does":"Supplies contextual examples of patterns, plans, and decision-making that can be transferred into the catalogue and tested in play.","ask":"What decision, pattern, or plan from this game could I recognise and use in my own game?","cues":["Moves replayed on the board or scoresheet","Pause before a critical move"],"trouble":"Watching a game without prediction or notes leaves no retrievable lesson and no link to the student's own positions.","at":[-0.36,0.34,0.05],"pattern":"pattern-boosting-engine","links":[{"to":"pattern-catalogue","rel":"raises"},{"to":"game-analysis","rel":"made by"},{"to":"chunk","rel":"raises"}],"sources":[{"label":"Gregory Serper, How To Study Master Chess Games","url":"https://www.chess.com/article/view/how-to-study-master-chess-games","kind":"practitioner","page":"article","quote":"When you finish analyzing the game, ask yourself a simple question: \"What have I learned from this game that I'll be able to use in my own game if the opportunity presents itself?\"","work":"chesscom-master-game-study"},{"label":"Gregory Serper, How To Study Master Chess Games","url":"https://www.chess.com/article/view/how-to-study-master-chess-games","kind":"practitioner","page":"article","quote":"Better yet, write your answer in your chess notebook.","work":"chesscom-master-game-study"},{"label":"Bobby Fischer, My 60 Memorable Games","url":"https://www.amazon.com/My-Memorable-Games-Bobby-Fischer/dp/190638830X","kind":"book","isbn":"190638830X","page":"annotated game collection","flag":"book text not opened in this pass","work":"bobby-fischer-my-60-memorable-games"},{"label":"Garry Kasparov, My Great Predecessors","url":"https://www.newinchess.com/my-great-predecessors-part-i-6937","kind":"book","isbn":"9781781945155","page":"annotated game history","flag":"book text not opened in this pass","work":"garry-kasparov-my-great-predecessors"},{"label":"Mikhail Tal, The Life and Games of Mikhail Tal","url":"https://www.amazon.co.uk/Life-Games-Mikhail-Chess-Collection-x/dp/1857442024","kind":"book","isbn":"1857442024","page":"annotated game collection","flag":"book text not opened in this pass","work":"mikhail-tal-life-and-games"}],"id":"master-game-study","look":{"parts":[{"slot":"frame","shape":"box","size":[1.08,1.08,0.05],"pos":[0,0,-0.03],"material":"matte","color":"#5a3a22"},{"slot":"board","shape":"plane","size":[1,1],"material":"matte","color":"#ffffff","svg":""}]}},{"term":"Game analysis","aka":["post-game review","self-analysis"],"kind":"process","plain":"Game analysis reconstructs a played game, marks critical decisions and errors, and explains the human cause before consulting tools or comparisons. The output is a small set of named lessons linked to positions, not a string of engine numbers.","does":"Converts a result and its turning points into concrete training positions and an updated pattern catalogue.","ask":"Where did the evaluation or plan change, what did I miss, and what repeatable test would catch it next time?","cues":["Reconstructed game","Critical decisions and errors marked","Lessons linked to positions"],"trouble":"The review becomes outcome-based blame, or an engine line is copied without understanding the decision that produced the error.","at":[0,0.34,0.05],"pattern":"pattern-braking-engine","links":[{"to":"blunder-check","rel":"measured by"},{"to":"pattern-catalogue","rel":"raises"},{"to":"chess-engine","rel":"see also"},{"to":"rating","rel":"measured by"}],"sources":[{"label":"FIDE, Curriculum Chess for Refugees","url":"https://www.fide.com/docs/presentations/Curriculum%20Chess%20for%20Refugees.pdf","kind":"standard","page":"p. 114","quote":"Keep analysing your mistakes after the game with your trainer, friends and opponents to understand them better and improve.","work":"fide-chess-for-refugees-curriculum"},{"label":"Gregory Serper, How To Study Master Chess Games","url":"https://www.chess.com/article/view/how-to-study-master-chess-games","kind":"practitioner","page":"article","quote":"When you finish analyzing the game, ask yourself a simple question: \"What have I learned from this game that I'll be able to use in my own game if the opportunity presents itself?\"","work":"chesscom-master-game-study"}],"id":"game-analysis","look":{"parts":[{"slot":"scoresheet","shape":"box","size":[0.7,0.06,0.88],"pos":[-0.12,0,0],"material":"matte","color":"#f3ead6"},{"slot":"turning-point","shape":"box","size":[0.12,0.02,0.2],"pos":[-0.12,0.08,0.1],"material":"glow","color":"#e8755f"},{"slot":"lens","shape":"torus","radius":0.16,"tube":0.024,"pos":[0.3,0.18,-0.1],"rot":[90,0,0],"material":"glow","color":"#68c4b0"},{"slot":"handle","shape":"cylinder","radiusTop":0.022,"radiusBottom":0.022,"height":0.19,"pos":[0.42,0.1,-0.22],"rot":[0,0,45],"material":"glow","color":"#68c4b0"}]}},{"term":"Chess engine","aka":["UCI engine","computer analysis"],"kind":"measure","plain":"A chess engine evaluates legal continuations and reports a preferred move or line; Stockfish is one free, strong UCI engine. Use the output as a comparison instrument after identifying the human decision and position, not as a replacement for understanding.","does":"Finds tactical resources, tests candidate lines, and exposes evaluation changes that can be turned into questions for human analysis.","ask":"Which human candidate did the engine refute or confirm, and what concrete feature explains the evaluation change?","cues":["Preferred move or line","Evaluation change","Depth, time or multipv settings"],"trouble":"Treating one numerical evaluation as an explanation, or accepting an engine move without checking legality, alternatives, and the resulting plan.","range":"Engine depth, time, multipv, and evaluation settings vary; compare like with like when reviewing a position.","at":[0.36,0.34,0.05],"pattern":"pattern-braking-engine","links":[{"to":"game-analysis","rel":"measured by"},{"to":"variation","rel":"controls"},{"to":"tablebase","rel":"see also"}],"unverified":"The Stockfish README was unavailable to the verifier; the node keeps the engine description conservative.","id":"chess-engine","look":{"parts":[{"slot":"engine","shape":"box","size":[0.76,0.18,0.52],"pos":[0,0,0],"material":"metal","color":"#303840"},{"slot":"eval","shape":"box","size":[0.08,0.38,0.1],"pos":[0.24,0.22,0],"material":"glow","color":"#68c4b0"},{"slot":"signal","shape":"particles","count":28,"box":[0.45,0.2,0.2],"pos":[-0.08,0.2,0],"size":0.018,"color":"#f0c45b","motion":"drift"}]}},{"term":"Rating","aka":["strength estimate","performance number"],"kind":"measure","plain":"A rating is a statistical measure of results against rated opponents, useful for comparing performance over a pool of games and time. It is an outcome measure, not a complete diagnosis of calculation, pattern knowledge, or endgame technique.","does":"Tracks performance changes across rated play while the improvement loop uses positions and decisions to explain why the number moved.","ask":"What result and opponent pool produced this change, and which position-based evidence explains the performance?","cues":["Rating number","Results against rated opponents","Opponent pool and time","Rating change"],"range":"FIDE's system converts fractional scores into rating differences and uses rating-difference probabilities to calculate rating change.","trouble":"Treating a single rating swing as proof of a newly learned skill, or confusing online and federation ratings without checking their systems.","at":[0.36,0,0.05],"pattern":"pattern-build-test-learn","links":[{"to":"game-analysis","rel":"measured by"},{"to":"pattern-catalogue","rel":"see also"}],"sources":[{"label":"FIDE, FIDE Rating Regulations effective from 1 March 2024","url":"https://handbook.fide.com/chapter/B022024","kind":"standard","page":"§8","quote":"The FIDE Rating system is a numerical system in which fractional scores are converted to rating differences and vice versa.","work":"fide-rating-regulations"},{"label":"FIDE, FIDE Rating Regulations effective from 1 March 2024","url":"https://handbook.fide.com/chapter/B022024","kind":"standard","page":"§8.3.2","quote":"Delta R = score - PD. For each game, the score is 1, 0.5 or 0.","work":"fide-rating-regulations"}],"id":"rating","look":{"parts":[{"slot":"scale","shape":"cylinder","radiusTop":0.34,"radiusBottom":0.34,"height":0.06,"pos":[0,0,0],"rot":[90,0,0],"material":"matte","color":"#303840"},{"slot":"needle","shape":"cylinder","radiusTop":0.018,"radiusBottom":0.018,"height":0.38,"pos":[0,0.12,0],"rot":[0,0,35],"material":"glow","color":"#f0c45b"},{"slot":"marker","shape":"sphere","radius":0.06,"pos":[0.22,0.23,0],"material":"glow","color":"#68c4b0"}]}},{"term":"Pattern-boosting engine","aka":["reinforcing learning loop","practice snowball"],"kind":"pattern","plain":"A pattern-boosting engine is the reinforcing loop in which active examples create named chunks, named chunks make practice more targeted, and practice supplies more examples to recognise. Its output is retrieval fluency, not an automatically stronger rating.","ask":"Which successful example becomes a named chunk, and how will repeated retrieval produce a new test rather than passive familiarity?","loop":{"type":"reinforcing","through":["master-game-study","chunk","puzzle-training","game-analysis","master-game-study"]},"links":[{"to":"master-game-study","rel":"see also"},{"to":"puzzle-training","rel":"see also"},{"to":"chunk","rel":"see also"},{"to":"improvement","rel":"see also"}],"sources":[{"label":"Gregory Serper, How To Study Master Chess Games","url":"https://www.chess.com/article/view/how-to-study-master-chess-games","kind":"practitioner","page":"article","quote":"When you have hundreds of such mini-lessons in your notebook, believe me you are going to be a different, much stronger player!","work":"chesscom-master-game-study"},{"label":"Waleed Naeem, Chess and Pattern Recognition: How to Improve Your Skills","url":"https://www.chess.com/blog/OnlineChessTeacher/chess-and-pattern-recognition-how-to-improve-your-skills","kind":"practitioner","page":"section 14","quote":"Daily drills are essential for ingraining patterns.","work":"chesscom-pattern-recognition"}],"id":"pattern-boosting-engine","look":{"parts":[{"slot":"seed","shape":"sphere","radius":0.09,"pos":[0,0.1,0],"material":"glow","color":"#f0c45b"},{"slot":"spiral","shape":"torus","radius":0.22,"tube":0.024,"pos":[0,0.22,0],"rot":[90,0,0],"material":"glow","color":"#68c4b0"},{"slot":"spiral-two","shape":"torus","radius":0.36,"tube":0.018,"pos":[0,0.34,0],"rot":[90,0,0],"material":"glow","color":"#8e82c8"}]}},{"term":"Pattern-braking engine","aka":["error-correction loop","balancing review loop"],"kind":"pattern","plain":"A pattern-braking engine is the balancing loop that interrupts overconfidence: a candidate is calculated, a blunder or evaluation change is exposed by a check or tool, the position is explained, and the next test is adjusted. It protects the catalogue from turning repeated mistakes into false rules.","ask":"What evidence stops this pattern from being applied mechanically, and what new check will catch the same failure?","loop":{"type":"balancing","through":["candidate-moves","chess-engine","game-analysis","blunder-check","candidate-moves"]},"links":[{"to":"blunder-check","rel":"see also"},{"to":"game-analysis","rel":"see also"},{"to":"chess-engine","rel":"see also"},{"to":"tablebase","rel":"see also"}],"sources":[{"label":"Bryan Smith, Forcing Moves, Part 1","url":"https://www.chess.com/article/view/forcing-moves-part-1","kind":"practitioner","page":"article","quote":"Assumptions are your enemy when calculating.","work":"chesscom-forcing-moves-part-1"}],"id":"pattern-braking-engine","look":{"parts":[{"slot":"ring","shape":"torus","radius":0.34,"tube":0.028,"pos":[0,0.18,0],"rot":[90,0,0],"material":"glow","color":"#e8755f"},{"slot":"brake","shape":"box","size":[0.16,0.16,0.08],"pos":[0,0.24,0],"material":"metal","color":"#303840"},{"slot":"check","shape":"sphere","radius":0.06,"pos":[-0.23,0.1,0],"material":"glow","color":"#68c4b0"},{"slot":"adjust","shape":"sphere","radius":0.06,"pos":[0.23,0.1,0],"material":"glow","color":"#f0c45b"}]}},{"term":"Pattern build-test-learn","aka":["study loop","catalogue-practice-review cycle"],"kind":"pattern","plain":"Pattern build-test-learn is the repeatable study cycle: name a configuration, test it in a puzzle or position, play or analyse it in context, and feed the result back into the catalogue. It prevents a catalogue from becoming a static list.","ask":"What pattern is being built, which position tests it, and what evidence changes the next version?","loop":{"type":"cycle","through":["pattern-catalogue","puzzle-training","game-analysis","pattern-catalogue"]},"links":[{"to":"pattern-catalogue","rel":"see also"},{"to":"puzzle-training","rel":"see also"},{"to":"game-analysis","rel":"see also"},{"to":"improvement","rel":"see also"}],"sources":[{"label":"Waleed Naeem, Chess and Pattern Recognition: How to Improve Your Skills","url":"https://www.chess.com/blog/OnlineChessTeacher/chess-and-pattern-recognition-how-to-improve-your-skills","kind":"practitioner","page":"sections 11–14","quote":"Reviewing your own games is one of the best ways to improve your pattern recognition.","work":"chesscom-pattern-recognition"},{"label":"FIDE, Curriculum Chess for Refugees","url":"https://www.fide.com/docs/presentations/Curriculum%20Chess%20for%20Refugees.pdf","kind":"standard","page":"p. 120","quote":"Trial and error are how we all learn, and falling short on a goal helps kids find out that it’s not fatal.","work":"fide-chess-for-refugees-curriculum"}],"id":"pattern-build-test-learn","look":{"parts":[{"slot":"build","shape":"box","size":[0.22,0.08,0.22],"pos":[-0.28,0.08,0],"material":"glow","color":"#f0c45b"},{"slot":"test","shape":"box","size":[0.22,0.08,0.22],"pos":[0,0.08,0],"material":"glow","color":"#e8755f"},{"slot":"learn","shape":"box","size":[0.22,0.08,0.22],"pos":[0.28,0.08,0],"material":"glow","color":"#68c4b0"},{"slot":"cycle","shape":"torus","radius":0.34,"tube":0.018,"pos":[0,0.22,0],"rot":[90,0,0],"material":"glow","color":"#b9c6d5"}]}},{"term":"Pattern chunking","aka":["recognition compression","meaningful configuration"],"kind":"pattern","plain":"Pattern chunking is the recurring compression by which a meaningful chess configuration becomes one retrievable unit: a tactical relation, mating net, opening setup, piece placement, pawn structure, or known ending. The unit still needs a legality and applicability check when the board changes.","ask":"Which recurring relations can be named as one unit, and what changed condition would make the chunk fail?","loop":{"type":"reinforcing","through":["pattern-catalogue","puzzle-training","chunk","pattern-catalogue"]},"links":[{"to":"chunk","rel":"see also"},{"to":"tactical-motif","rel":"see also"},{"to":"mating-pattern","rel":"see also"},{"to":"theoretical-position","rel":"see also"}],"sources":[{"label":"Waleed Naeem, Chess and Pattern Recognition: How to Improve Your Skills","url":"https://www.chess.com/blog/OnlineChessTeacher/chess-and-pattern-recognition-how-to-improve-your-skills","kind":"practitioner","page":"section 1","quote":"Pattern recognition in chess refers to the ability to identify and apply familiar structures, tactics, or positions from previous experience or study.","work":"chesscom-pattern-recognition"},{"label":"Waleed Naeem, Chess and Pattern Recognition: How to Improve Your Skills","url":"https://www.chess.com/blog/OnlineChessTeacher/chess-and-pattern-recognition-how-to-improve-your-skills","kind":"practitioner","page":"section 2","quote":"Recognizing recurring patterns also minimizes blunders, as players can identify familiar threats and respond appropriately.","work":"chesscom-pattern-recognition"}],"id":"pattern-chunking","look":{"parts":[{"slot":"pieces","shape":"particles","count":18,"box":[0.72,0.18,0.55],"pos":[0,0.08,0],"size":0.028,"color":"#f0c45b","motion":"orbit"},{"slot":"chunk-ring","shape":"torus","radius":0.3,"tube":0.024,"pos":[0,0.22,0],"rot":[90,0,0],"material":"glow","color":"#68c4b0"}]}}],"assembly":[{"title":"Build the player","text":"Play, then go over your games, solve puzzles and replay master games. Each pattern you learn this way becomes one you see at a glance at the board.","adds":["chunk","puzzle-training","master-game-study","game-analysis","chess-engine","rating"],"makes":"improvement"},{"title":"Learn the rules","text":"How each piece moves, check and checkmate, castling, en passant and promotion, and the ways a game is drawn.","adds":["piece-moves","check-and-mate","special-moves","draw-rules"],"makes":"rules"},{"title":"Prepare an opening","text":"Follow the opening principles, pick a small repertoire of opening systems and learn the plans behind their moves.","adds":["opening-principles","opening-system","repertoire"],"makes":"opening"},{"title":"Read the position","text":"Count the material, then look at the pawns, the kings, the activity of the pieces and who has more space and the initiative.","adds":["material","pawn-structure","king-safety","piece-activity","space","initiative"],"makes":"position"},{"title":"Make a plan","text":"Choose a plan that fits the pawn 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fall.","adds":["rules","clock","opening","position","middlegame","tactics","calculation","endgame","improvement"],"makes":"chess-game"}],"survey":{"lists":[{"id":"uww-math177-texts","label":"University of Wisconsin–Whitewater, Suitable Texts for Mathematics 177","url":"https://math.uww.edu/~mcfarlat/177book.htm","kind":"course"},{"id":"utd-ed4358-syllabus","label":"Alexey Root, UT Dallas ED 4358 Using Chess in Elementary Schools syllabus","url":"https://dox.utdallas.edu/syl20577","kind":"course"},{"id":"utd-ed4359-syllabus","label":"Alexey Root, UT Dallas ED 4359 Chess II—Institutional & Cultural Contexts of Chess syllabus","url":"https://dox.utdallas.edu/syl113647","kind":"course"},{"id":"ginger-gm-five-books","label":"Simon Williams, Five chess books that have helped me become a Grandmaster","url":"https://www.chess.com/blog/Ginger_GM/five-chess-books-that-have-helped-me-become-a-grandmaster","kind":"practitioner"},{"id":"fivebooks-dominic-lawson","label":"Dominic Lawson, The Best 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