Dev Builds » 20141112-2116

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.

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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.

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 4739037f967ac3c818907e89cc88c7b97021d027
Author Gary Linscott
Date 2014-11-12 21:16:33 UTC
100% accurate PV display This gives SF accurate PVs, such that the evaluation of the leaf node in the PV matches the score backed up to the root (99% of the time. q-search will use the value stored in the hash table instead of the eval value sometimes). One drawback is that fail-high/low only get a minimal 2 move PV. It doesn't add any additional overhead to the non-PV codepath except an extra eight bytes to the SearchStack structure in multi-threaded searches. A core part of this is not pruning based on TT score in PV nodes. This was measured as not being a regression at multiple TCs, except for one exception, fast TC with huge hash, which is not realistic for longer searches. STC - 1 thread, 128 mb hash ELO: 1.42 +-3.1 (95%) LOS: 81.9% Total: 20000 W: 4078 L: 3996 D: 11926 STC - 3 thread, 128 mb hash ELO: -3.60 +-2.9 (95%) LOS: 0.8% Total: 20000 W: 3575 L: 3782 D: 12643 STC - 3 thread, 8 mb hash ELO: 0.12 +-2.9 (95%) LOS: 53.3% Total: 20000 W: 3654 L: 3647 D: 12699 LTC - 3 thread, 32mb hash ELO: 2.29 +-2.0 (95%) LOS: 98.8% Total: 35740 W: 5618 L: 5382 D: 24740 Bench: 6984058 Resolves #102
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