Part

Calculation

You might say: calculating variations, concrete analysis

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.

What it 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?

Parts

• Candidate moves: Candidate moves are the small shortlist worth calculating in a critical position.
• Variation: 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.
• Blunder check: 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.

Connections

• Made by: Tactics
• See also: Chess engine
• See also: Pattern build-test-learn

Sources

1. Bryan Smith, Forcing Moves, Part 1, articleWhen we calculate variations, we should always pay attention – and calculate first – the forcing moves.

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