Dev Builds » 20181120-0700

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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

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


Commit ID 4b88bea4fcd5c4cb931610f97460615dd71ff35b
Author Joost VandeVondele
Date 2018-11-20 07:00:19 UTC
Force time check on TB probe in search. Because of aggressive time management and optimistic assumptions about move overhead, it's still very easy to get Stockfish to forfeit on time when we hit an endgame and have Syzygy EGTB on a spinning drive. The latency from serving a few thousand EGTB probes (~10ms each), of which there can currently be up to 4000 outstanding before a time check, will easily overwhelm the default Move Overhead of 30ms. This problem was first raised by Gian-Carlo Pascutto and some solutions and improvements were discussed in the following pull requests: This patch is a minimal change proposed by Marco Costalba to lower the impact of the bug. We now force a check of the clock right after each tablebase read. No functional change.
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