Chess-Nut-Engine/

chess-sft-eval

Held-out evaluation splits and a frozen benchmark for the Chess SFT training pipeline. Every FEN in these files is excluded from training data via a blocklist to guarantee zero contamination.

Eval examples 13,000

Benchmark examples 13,000

Splits 9 (perception, rules, tactics, evaluation, openings, endgames, planning, chess960, mate)

Format JSONL

Training companion Chess-Nut-Engine/chess-sft-data