Dev Builds » 20180227-1742

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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 cccbecb6f8de4e34d8856f121760b74185987d8e
Author Stefan Geschwentner
Date 2018-02-27 17:42:59 UTC
Stat score initialization: grandchildren This is the sequel of the previous patch, we now let the parent node initialize stat score to zero once for all grandchildren. Initialize statScore to zero for the grandchildren of the current position. So statScore is shared between all grandchildren and only the first grandchild starts with statScore = 0. Later grandchildren start with the last calculated statScore of the previous grandchild. This influences the reduction rules in LMR which are based on the statScore of parent position. Tests results against the previous patch: STC: LLR: 2.96 (-2.94,2.94) [0.00,4.00] Total: 23676 W: 5417 L: 5157 D: 13102 LTC: LLR: 2.96 (-2.94,2.94) [0.00,4.00] Total: 35485 W: 6168 L: 5898 D: 23419 Bench: 5643520
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