CCRL 40/40
Downloads and Statistics
August 17, 2019
Testing summary:
Total: 1'075'629 games
played by 2'520 programs
147029 CPU days (X2 4600+)

White wins: 373'444 (34.7%)
Black wins: 277'846 (25.8%)
Draws: 424'339 (39.5%)
White score: 54.4%

Custom engine selection

Comparing 7 engines!
7 selected engines played 30 games with each other



CCRL 40/40 Rating List - Custom engine selection
1075629 games played by 2520 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 August 17, 2019 with Bayeselo based on 1'075'629 games
Tested by CCRL team, 2005-2019, http://computerchess.org.uk/ccrl/4040/

Rank              Engine                Elo   +    -   Score  AvOp  Games
Octochess r5506 64-bit 4CPU       2888  +21  -21  44.5%  +35.4   715
  Octochess r5190 64-bit 4CPU       2823  +24  -24  45.9%  +24.4   555
  Octochess r5506 64-bit            2782  +16  -16  48.4%   +8.7  1314
  Octochess r5190 64-bit            2772  +15  -14  48.7%   +8.2  1521
  Octochess r5132 64-bit            2727  +32  -32  50.5%   -2.7   307
  Octochess r4984 64-bit            2724  +31  -31  49.7%   +3.9   324
  Octochess r4741 64-bit            2697  +32  -32  51.1%   -4.4   308

Created in 2005-2013 by CCRL team
Last games added on August 17, 2019