CCRL 40/40
Downloads and Statistics
July 11, 2019
Testing summary:
Total: 1'066'603 games
played by 2'494 programs
145750 CPU days (X2 4600+)

White wins: 370'641 (34.7%)
Black wins: 275'905 (25.9%)
Draws: 420'057 (39.4%)
White score: 54.4%

Custom engine selection

Comparing 9 engines!
9 selected engines played 0 games with each other



CCRL 40/40 Rating List - Custom engine selection
1066603 games played by 2494 programs, run by 22 testers
Ponder off, General books (up to 12 moves), 3-4-5 piece EGTB
Time control: Equivalent to 40 moves in 40 minutes on Athlon 64 X2 4600+ (2.4 GHz), about 15 minutes on a modern Intel CPU.
Computed on July 11, 2019 with Bayeselo based on 1'066'603 games
Tested by CCRL team, 2005-2019, http://computerchess.org.uk/ccrl/4040/

Rank               Engine                Elo   +    -   Score  AvOp  Games
K2 0.91                            2614  +15  -15  49.0%   +7.3  1497
  K2 0.87                            2582  +17  -18  49.0%   +6.2  1102
  K2 0.83                            2532  +27  -27  51.7%  -12.1   474
  K2 0.75                            2491  +23  -23  52.4%  -18.9   634
  K2 0.79                            2440  +29  -29  47.6%  +16.8   396
  K2 0.71                            2417  +28  -28  51.4%   -9.7   439
  K2 0.67                            2351  +23  -23  52.5%  -16.1   667
  K2 0.57                            2183  +34  -34  46.2%  +27.8   302
  K2 0.43f                           2138  +33  -33  48.2%  +11.6   338

Created in 2005-2013 by CCRL team
Last games added on July 11, 2019