Dev Builds » 20190914-2232

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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.


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Commit ID 843a6c43053ceb9cc79d29bf7c0d3a5d236e057e
Author Vizvezdenec
Date 2019-09-14 22:32:54 UTC
Introduce midgame initiative This patch finally introduces something that was tried for years: midgame score dependance on complexity of position. More precisely, if the position is very simplified and the complexity measure calculated in the initiative() function is inferior to -50 by an amount d, then we add this value d to the midgame score. One example of play of this patch will be (again!) 4 vs 3 etc same flank endgames where sides have a lot of non-pawn material: 4 vs 3 draw mostly remains the same draw even if we add a lot of equal material to both sides. STC run was stopped after 200k games (and not converging): LLR: -1.75 (-2.94,2.94) [0.50,4.50] Total: 200319 W: 44197 L: 43310 D: 112812 passed LTC: LLR: 2.95 (-2.94,2.94) [0.00,3.50] Total: 41051 W: 6858 L: 6570 D: 27623 This is the first and not really precise version, a lot of other stuff can be tried on top of it (separate complexity for middlegame, some more terms, even simple retuning of values). Bench: 4248476
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