Dev Builds » 20210526-2321

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NCM plays each Stockfish dev build 20,000 times against Stockfish 15. This yields an approximate Elo difference and establishes confidence in the strength of the dev builds.

Summary

Host Duration Avg Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN

Commit

Commit ID f193778446acc6e60d7f0f99c6eb01489f89e962
Author Stéphane Nicolet
Date 2021-05-26 23:21:56 UTC
Do not use lazy evaluation inside NNUE This simplification patch implements two changes: 1. it simplifies away the so-called "lazy" path in the NNUE evaluation internals, where we trusted the psqt head alone to avoid the costly "positional" head in some cases; 2. it raises a little bit the NNUEThreshold1 in evaluate.cpp (from 682 to 800), which increases the limit where we switched from NNUE eval to Classical eval. Both effects increase the number of positional evaluations done by our new net architecture, but the results of our tests below seem to indicate that the loss of speed will be compensated by the gain of eval quality. STC: LLR: 2.95 (-2.94,2.94) <-2.50,0.50> Total: 26280 W: 2244 L: 2137 D: 21899 Ptnml(0-2): 72, 1755, 9405, 1810, 98 https://tests.stockfishchess.org/tests/view/60ae73f112066fd299795a51 LTC: LLR: 2.95 (-2.94,2.94) <-2.50,0.50> Total: 20592 W: 750 L: 677 D: 19165 Ptnml(0-2): 9, 614, 8980, 681, 12 https://tests.stockfishchess.org/tests/view/60ae88e812066fd299795a82 closes https://github.com/official-stockfish/Stockfish/pull/3503 Bench: 3817907
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