Dev Builds » 20180829-0000

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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 166bf90e4172b77aa0c420ed271fa55e92301a70
Author Steinar H. Gunderson
Date 2018-08-29 00:00:20 UTC
Shrink the hash table of tablebases back to 4096 entries There is no need to make this as large as 65536 just for the sake of the single 7-man tablebase that happens to have the key 0xf9247fff. Idea for the fix by Ronald de Man, who suggested simply to allow more buckets past the end. We also implement Robin Hood hashing for the hash table, which takes the worst -case search for full 7-man tablebases down from 68 to 11 probes (Also takes the average probe length from 2.06 to 2.05). For a table with 8K entries, the corresponding numbers would be worst-case from 9 to 4, with average from 1.30 to 1.29. No functional change
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