Measure

Rating

You might say: strength estimate, performance number

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.

What it 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?

Typical

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.

What to look for

1. Rating number
2. Results against rated opponents
3. Opponent pool and time
4. Rating change

Pattern

Pattern build-test-learn

Connections

• Measured by: Game analysis
• See also: Pattern catalogue

Sources

1. FIDE, FIDE Rating Regulations effective from 1 March 2024, §8The FIDE Rating system is a numerical system in which fractional scores are converted to rating differences and vice versa.
2. FIDE, FIDE Rating Regulations effective from 1 March 2024, §8.3.2Delta R = score - PD. For each game, the score is 1, 0.5 or 0.

Use it on your project

teardown-apply: hold "Rating" (rating) from the teardown at https://teardownatlas.com/chess/ against my project

Paste it into a coding agent that has the teardown skills.

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