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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.


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 ID b8c00efa2767ebf74545d2ba4bd344ef7c963319
Author G√ľnther Demetz
Date 2020-02-22 20:32:32 UTC
Improve move order near the root Current move histories are known to work well near the leaves, whilst at higher depths they aren't very helpful. To address this problem this patch introduces a table dedicated for what's happening at plies 0-3. It's structured like mainHistory with ply index instead of color. It get cleared with each new search and is filled during iterative deepening at higher depths when recording successful quiet moves near the root or traversing nodes which were in the principal variation (ttPv). Medium TC (20+0.2): LLR: 2.94 (-2.94,2.94) {-0.50,1.50} Total: 100910 W: 16682 L: 16376 D: 67852 Ptnml(0-2): 1177, 10983, 25883, 11181, 1231 LTC: LLR: 2.95 (-2.94,2.94) {0.25,1.75} Total: 80444 W: 10495 L: 10095 D: 59854 Ptnml(0-2): 551, 7479, 23803, 7797, 592 closes Bench: 4705960
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