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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研究
关于 Elo+Chess 使用的国际象棋分析、评级映射、基准构建和数据驱动改进方法的研究笔记。
为 Elo+Chess 构建分层 Lichess 基准曲线
方法说明解释了 Elo+Chess 如何从大型移动状态和玩家游戏样本构建分层 Lichess 基准曲线、玩家历史百分位目标和生产报告图形。
阅读论文使用模态回归估计跨平台国际象棋评分映射
方法注释描述了 Elo+Chess 相同用户名评级映射研究、模态拟合动机、过滤标准以及当前按游戏类型划分的 Lichess 到 Chess.com 的转换估计。
阅读论文A 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.
Explore gallery