CCRL 40/4
Downloads and Statistics
July 20, 2019
Testing summary:
Total: 2'069'919 games
played by 2'400 programs
27811 CPU days (X2 4600+)

White wins: 804'066 (38.8%)
Black wins: 650'528 (31.4%)
Draws: 615'325 (29.7%)
White score: 53.7%

Custom engine selection

Comparing 13 engines!
13 selected engines played 0 games with each other



CCRL 40/4 Rating List - Custom engine selection
2069919 games played by 2400 programs, run by 21 testers
Ponder off, General books (up to 12 moves), 3-4-5 piece EGTB
Time control: Equivalent to 40 moves in 4 minutes on Athlon 64 X2 4600+ (2.4 GHz), about 1.5 minutes on a modern Intel CPU.
Computed on July 20, 2019 with Bayeselo based on 2'069'919 games
Tested by CCRL team, 2005-2019, http://computerchess.org.uk/ccrl/404/

Rank               Engine                Elo   +    -   Score  AvOp  Games
Zevra 2.0 r172 64-bit              2407  +31  -30  66.7% -123.2   413
  Zevra 2.1.1 r216 64-bit            2377  +18  -18  43.9%  +45.8  1156
  Zevra 1.8.6 r672 64-bit            2302  +18  -18  47.9%  +15.6  1137
  Zevra 1.8.5 r664 64-bit            2273  +25  -25  57.9%  -58.7   567
  Zevra 1.8.4 r650 64-bit            2220  +20  -20  45.5%  +36.6   897
  Zevra 1.8.3 r636 64-bit            2214  +20  -20  52.0%  -14.2   894
  Zevra 1.8.1 r594 64-bit            2152  +32  -31  67.9% -132.7   410
  Zevra 1.6.1 r512 64-bit            1954  +20  -20  48.9%   +7.3   884
  Zevra 1.6.1 r5136 64-bit           1933  +30  -30  46.9%  +23.0   384
  Zevra 1.5 r446 64-bit              1891  +28  -28  54.0%  -30.9   475
  Zevra 1.6 r497                     1870  +31  -31  45.5%  +32.9   379
  Zevra 1.31 r340                    1767  +26  -26  49.3%   +5.3   543
  Zevra 1.21 r290                    1755  +28  -28  37.6%  +91.0   458

Created in 2005-2013 by CCRL team
Last games added on July 20, 2019