Dev Builds » 20161105-0655

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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 c0bb0415394179e9c771cc96a9da6724fc14c167
Author Marco Costalba
Date 2016-11-05 06:55:08 UTC
Rewrite syzygy in C++ Rewrite the code in SF style, simplify and document it. Code is now much clear and bug free (no mem-leaks and other small issues) and is also smaller (more than 600 lines of code removed). All the code has been rewritten but root_probe() and root_probe_wdl() that are completely misplaced and should be retired altogheter. For now just leave them in the original version. Code is fully and deeply tested for equivalency both in functionality and in speed with hundreds of games and test positions and is guaranteed to be 100% equivalent to the original. Tested with tb_dbg branch for functional equivalency on more than 12M positions. stockfish.exe bench 128 1 16 syzygy.epd Position: 2016/2016 Total 12121156 Hits 0 hit rate (%) 0 Total time (ms) : 4417851 Nodes searched : 1100151204 Nodes/second : 249024 Tested with 5,000 games match against master, 1 Thread, 128 MB Hash each, tc 40+0.4, which is almost equivalent to LTC in Fishtest on this machine. 3-, 4- and 5-men syzygy bases on SSD, 12-moves opening book to emphasize mid- and endgame. Score of SF-SyzygyC++ vs SF-Master: 633 - 617 - 3750 [0.502] 5000 ELO difference: 1 No functional change.
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