Dev Builds » 20260529-1705

You are viewing an old NCM Stockfish dev build test. You may find the most recent dev build tests using Stockfish 15 as the baseline here.

Use this dev build

NCM plays each Stockfish dev build 20,000 times against Stockfish 14. 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	24a551899ed5be1533e7a01f65d649469f81bb51
Author	Ryan Hirsch
Date	2026-05-29 17:05:08 UTC
Speed up feature transform on neon STC: LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 109344 W: 27919 L: 27520 D: 53905 Ptnml(0-2): 200, 11718, 30434, 12123, 197 https://tests.stockfishchess.org/tests/view/6a123ed0818cacc1db0ac39e Updated to anematode’s suggestion - apparently clang already optimized it to this. Apple M1 Result of 100 runs base (...kfish.master) = 1307276 +/- 10930 test (./stockfish ) = 1320940 +/- 11279 diff = +13664 +/- 2223 speedup = +0.0105 P(speedup > 0) = 1.0000 closes https://github.com/official-stockfish/Stockfish/pull/6855 No functional change