Spending 10 months building the most human-like chess bot

A developer spent 10 months creating Chessbook-1, a chess AI designed to play like human opponents at any rating level, addressing limitations in existing models like Allie 2.0 and Maia-3. Chessbook-1 excels at predicting human moves, maintains appropriate strength across all rating levels, and accurately predicts time usage and decision-making patterns in time-pressured situations. The model was trained on Lichess games through July 2026 and outperforms existing alternatives in most capability metrics.