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Chess engine: Stockfish 21042813

on

Stockfish - UCI chess engine, compiled by Xoto10
Rating JCER=3157

Timestamp: 1619611126
Change tempo with time and threads

Introduce variable tempo for nnue depending on logarithm of estimated strength, where strength is the product of time and number of threads.

The original idea here was that NNUE is best with a slightly different tempo value to classical, since its style of play is slightly different. It turns out that the best tempo for NNUE varies with strength of play, so a formula is used which gives about 19 for STC and 24 for LTC under current fishtest settings.

STC 10+0.1:
LLR: 2.94 (-2.94,2.94) {-0.20,1.10}
Total: 120816 W: 11155 L: 10861 D: 98800 Elo +0.85
Ptnml(0-2): 406, 8728, 41933, 8848, 493
https://tests.stockfishchess.org/tests/view/60735b3a8141753378960534

LTC 60+0.6:
LLR: 2.94 (-2.94,2.94) {0.20,0.90}
Total: 35688 W: 1392 L: 1234 D: 33062 Elo +1.54
Ptnml(0-2): 23, 1079, 15473, 1255, 14
https://tests.stockfishchess.org/tests/view/6073ffbc814175337896057f

Passed non-regression SMP test at LTC 20+0.2 (8 threads):
LLR: 2.95 (-2.94,2.94) {-0.70,0.20}
Total: 11008 W: 317 L: 267 D: 10424 Elo +1.58
Ptnml(0-2): 2, 245, 4962, 291, 4
https://tests.stockfishchess.org/tests/view/60749ea881417533789605a4
Bench 4075325

Stockfish 21042813 and NNUE download

 

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