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lynx-chess / Lynx

Chess Engine, written in C#
https://lichess.org/@/Lynx_BOT
MIT License
39 stars 3 forks source link

⚖️ Exclude pawns from `PieceAttackedByPawnPenalty` calculation #1015

Closed eduherminio closed 4 days ago

eduherminio commented 5 days ago

Small changes in the tuned values, looking almost neutral as expected

Score of Lynx-eval-pieceattackedbypawnpenalty-no-pawns-3927-win-x64 vs Lynx 3906 - main: 2770 - 2760 - 4370  [0.501] 9900
...      Lynx-eval-pieceattackedbypawnpenalty-no-pawns-3927-win-x64 playing White: 2088 - 668 - 2194  [0.643] 4950
...      Lynx-eval-pieceattackedbypawnpenalty-no-pawns-3927-win-x64 playing Black: 682 - 2092 - 2176  [0.358] 4950
...      White vs Black: 4180 - 1350 - 4370  [0.643] 9900
Elo difference: 0.4 +/- 5.1, LOS: 55.3 %, DrawRatio: 44.1 %
SPRT: llr -0.506 (-17.5%), lbound -2.25, ubound 2.89