cetusian/chess-sft-mix-200k

Chess SFT Mix — GM games + puzzles + Stockfish A ~400,000-row supervised fine-tuning dataset assembled for competitive chess LLM training. Unified chat format, single system prompt, three complementary sources of signal. This is the follow-up to cetusian/chess-sft-lichess-2200, which was pure GM behaviour cloning. This dataset adds tactical puzzles and engine-ground-truth labels on top of it, because BC alone caps at the teacher's (fallible) move quality. Summary… See the full description on the dataset page: https://huggingface.co/datasets/cetusian/chess-sft-mix-200k.