Chess engine: Stockfish Polyglot 250425 (by Marco Zerbinati)

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Stockfish Polyglot 

Polyglot Book Learning Support
NEW: Added Book1 Width and Book2 Width options to control the variety of book move selection.
This update adds full learning support for Polyglot .bin opening books.

Features:
Supports Book1 and Book2 independently
Moves played from the book are logged with:
Position key (polyglot_key)
Move code (sf_move_to_pg_move)
Book origin (Book1 or Book2)
Log format is structured for automatic post-game processing
Learning Automation:
A Python script (apply_learn_batch.py) processes the log:
Reads all games from book_usage.log
Recognizes results via # RESULT: win/loss/draw
Applies the appropriate delta (+500/-500/0) to the learn field
Updates either book1.bin or book2.bin accordingly
Supports multiple games per session (# GAME_START/# GAME_END)
Automatically clears the log after processing
Saves all applied changes in learn_update_history.log


Rating Chess Engines Diary CEDR=3760

Stockfish Polyglot 250425 - download


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