CCRL 40/40
Downloads and Statistics
October 12, 2019
Testing summary:
Total: 1'090'583 games
played by 2'551 programs
149018 CPU days (X2 4600+)

White wins: 378'348 (34.7%)
Black wins: 281'291 (25.8%)
Draws: 430'944 (39.5%)
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
1090583 games played by 2551 programs, run by 23 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 October 12, 2019 with Bayeselo based on 1'090'583 games
Tested by CCRL team, 2005-2019, http://ccrl.chessdom.com/ccrl/4040/

Rank               Engine                Elo   +    -   Score  AvOp  Games
K2 0.91                            2615  +15  -15  49.0%   +7.4  1497
  K2 0.87                            2583  +18  -18  49.0%   +6.1  1102
  K2 0.83                            2533  +27  -27  51.7%  -12.1   474
  K2 0.75                            2492  +23  -23  52.4%  -19.0   634
  K2 0.79                            2441  +29  -29  47.6%  +16.8   396
  K2 0.71                            2418  +28  -28  51.4%   -9.9   439
  K2 0.67                            2354  +23  -23  52.7%  -17.4   677
  K2 0.57                            2187  +33  -33  47.0%  +21.8   314
  K2 0.43f                           2139  +33  -33  48.2%  +11.4   338

Created in 2005-2013 by CCRL team
Last games added on October 12, 2019