CCRL 40/40
Downloads and Statistics
October 19, 2019
Testing summary:
Total: 1'092'341 games
played by 2'556 programs
149261 CPU days (X2 4600+)

White wins: 378'952 (34.7%)
Black wins: 281'710 (25.8%)
Draws: 431'679 (39.5%)
White score: 54.5%

Custom engine selection

Comparing 26 engines!
26 selected engines played 159 games with each other



CCRL 40/40 Rating List - Custom engine selection
1092341 games played by 2556 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 19, 2019 with Bayeselo based on 1'092'341 games
Tested by CCRL team, 2005-2019, http://ccrl.chessdom.com/ccrl/4040/

Rank               Engine                Elo   +    -   Score  AvOp  Games
Naum 4.6 64-bit 4CPU               3096  +14  -14  48.1%  +11.5  1544
  Naum 4.2 64-bit 4CPU               3062  +10  -10  44.2%  +36.5  3290
  Naum 4.1 64-bit 4CPU               3057  +28  -28  60.1%  -65.4   398
  Naum 4 64-bit 4CPU                 3045  +17  -17  59.8%  -64.4  1179
  Naum 4.6 64-bit                    3013  +12  -12  46.8%  +13.8  2204
  Naum 4.2 64-bit                    2977   +9   -9  47.4%  +15.4  4018
  Naum 3.1 64-bit 4CPU               2969  +18  -18  57.7%  -51.6   986
  Naum 4.2 32-bit                    2960  +10  -10  52.7%  -17.8  3167
  Naum 3 64-bit 4CPU                 2956  +19  -19  59.6%  -64.3   926
  Naum 4 64-bit                      2955  +14  -14  59.7%  -65.3  1723
  Naum 4.1 32-bit                    2954  +21  -21  59.2%  -56.1   688
  Naum 4.1 64-bit                    2952  +21  -21  57.9%  -52.7   676
  Naum 4 32-bit                      2931  +14  -14  61.1%  -69.0  1599
  Naum 2.2 64-bit 4CPU               2905  +18  -18  55.9%  -37.8  1018
  Naum 2.1 64-bit 4CPU               2865  +21  -21  53.2%  -20.9   687
  Naum 3.1 64-bit                    2861  +18  -18  49.3%   +5.3   967
  Naum 3.1 32-bit                    2859  +16  -16  54.8%  -33.0  1312
  Naum 3 64-bit                      2857  +19  -19  55.1%  -35.4   867
  Naum 3 32-bit                      2852  +18  -18  55.3%  -36.2   977
  Naum 2.2 64-bit                    2798  +25  -25  51.0%   -8.9   483
  Naum 2.2 32-bit                    2794  +15  -15  53.2%  -19.3  1351
  Naum 2.1 32-bit                    2743  +20  -20  51.4%  -11.0   847
  Naum 2.0 32-bit                    2698  +15  -15  51.0%   -8.6  1558
  Naum 2.0 64-bit                    2697  +23  -23  51.5%   -9.3   618
  Naum 1.91 64-bit                   2610  +15  -15  46.8%  +23.6  1467
  Naum 1.91 32-bit                   2606  +15  -15  46.4%  +24.4  1440

Created in 2005-2013 by CCRL team
Last games added on October 19, 2019