Is it time for a chess checkup?
A plain-English introduction to ChessCheckup.com, a principles-first chess habit check for beginner and intermediate players, powered by the Elo+Chess reporting engine.
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Investigación
Notas de investigación sobre análisis de ajedrez, asignaciones de calificaciones, construcción de puntos de referencia y métodos de mejora basados en datos utilizados por Elo+Chess.
Creación de curvas de referencia Lichess estratificadas para Elo+Chess
Una nota metodológica que explica cómo Elo+Chess construye curvas de referencia estratificadas de Lichess, objetivos de percentiles del historial de jugadores y gráficos de informes de producción a partir de grandes muestras de estados de movimiento y juegos de jugadores.
leer papelEstimación de asignaciones de calificación de ajedrez multiplataforma con regresión modal
Una nota de métodos que describe el estudio de mapeo de calificación del mismo nombre de usuario de Elo+Chess, la motivación de ajuste modal, los criterios de filtrado y las estimaciones actuales de conversión de Lichess a Chess.com por tipo de juego.
leer papelA Very Large Scale Study of the Halloween Gambit
A Lichess.org study of the Halloween Gambit's frequency, practical success, played-versus-declined outcomes, and opening clock impact from January 2025 through May 2026.
Read articleWho let the cows out?
A Lichess.org study of tucked Cow setups, single-cow redeployments, and the full b/g-file knight shuffle from January 2025 through May 2026.
Read articleYour Chess Teacher Was Right: We Analyzed 1.3 Billion Games To Prove It
A public Medium article sharing Elo+Chess research observations and charts for a wider chess audience.
Read on MediumDoes Bullet and Blitz Hurt 10min Rapid Improvement on Lichess.org?
An observational Lichess.org study of more than one billion public games testing whether 1min bullet and 3min blitz volume is associated with slower 10min rapid improvement for beginner and club-level players.
Read articleDo Beginners Resign Too Early?
A low-key research note on Lichess 10+0 rapid resignation-like endings. In this dataset, well-sampled rating bands from under 800 to nearly 1800 typically resign around a 7-pawn Stockfish disadvantage.
Read articleA comparison of pieces remaining on-board for valid game endings across Elo buckets.
A Lichess study comparing how many pieces remain on the board at valid checkmate and engine-confirmed resignation-like endings across Bullet, Blitz, 10min Rapid, and >10min Rapid.
Read studyPawn Patience Gallery
Static research gallery showing the average move number before each original pawn is first touched, split by game type, color, pawn file, and Elo bucket.
Explore galleryf3/f6 Move Metrics
Static research gallery for White f3 and Black f6 rates, including before castling, before development completion, and associated win-rate views by Elo bucket.
Explore galleryPawn Capture and Promotion Outcomes
Static research gallery showing the average row where pawns are captured, how often promoted pieces are captured immediately, and how often captured promotions produce no net material gain.
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