GPT 6 Astra edits Stockfish's NNUE weights, wins 131-125 over official Stockfish

imjustnewatai · x · 2026-11-10

A user had GPT 6 Astra edit Stockfish's NNUE weights and search; the experimental build beat official Stockfish 131–125 over 256 local games (+8 Elo, wide 95% CI of −15 to +31). The author is still testing whether the gain is real. Either way, an LLM hand-tuning a top chess engine to parity is a striking experiment.

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