6,863,015,449 standard rated games, played on lichess.org, in PGN format. Each file contains the games for one month only; they are not cumulative.
Use case
Real-time move suggestion for an online chess-training platform
| Example observations | FEN encoded board (64 × 12 binary planes or 8 × 8 × 12) Side to move Castling rights Move number & ply clock Clocks: white/black remaining time (sec) PGN tags Player Elo (white & black) |
| Example actions | One of the ≤ 218 legal moves in standard chess, represented by UCI (e2e4, g1f3…) |
| Example reward | Terminal: +1 for win, 0 for draw, –1 for loss Optional shaping: Stockfish Δeval after each move or small negative step penalty to encourage faster wins |