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Chess engine: Stockfish 21052221

on

Stockfish - UCI chess engine, compiled by Stéphane Nicolet
Rating JCER=3144

Timestamp: 1621710562
Sometimes change the (materialist, positional) balance

Our new nets output two values for the side to move in the last layer.
We can interpret the first value as a material evaluation of the position, and the second one as the dynamic, positional value of the location of pieces.

This patch changes the balance for the (materialist, positional) parts of the score from (128, 128) to (121, 135) when the piece material is equal between the two players, but keeps the standard (128, 128) balance when one player is at least an exchange up.

Passed STC:
LLR: 2.93 (-2.94,2.94) <-0.50,2.50>
Total: 15936 W: 1421 L: 1266 D: 13249 Elo +3.38
Ptnml(0-2): 37, 1037, 5694, 1134, 66
https://tests.stockfishchess.org/tests/view/60a82df9ce8ea25a3ef0408f

Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,3.50>
Total: 13904 W: 516 L: 410 D: 12978 Elo +2.65
Ptnml(0-2): 4, 374, 6088, 484, 2
https://tests.stockfishchess.org/tests/view/60a8bbf9ce8ea25a3ef04101
Bench: 3856635

Stockfish 21052221 and NNUE download

 

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