CCRL 40/4
Downloads and Statistics
December 7, 2019
Testing summary:
Total: 2'143'600 games
played by 2'509 programs
29100 CPU days (X2 4600+)

White wins: 830'432 (38.7%)
Black wins: 670'629 (31.3%)
Draws: 642'539 (30.0%)
White score: 53.7%

Custom engine selection

Comparing 21 engines!
21 selected engines played 403 games with each other



CCRL 40/4 Rating List - Custom engine selection
2143600 games played by 2509 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 4 minutes on Athlon 64 X2 4600+ (2.4 GHz), about 1.5 minutes on a modern CPU.
Computed on December 7, 2019 with Bayeselo based on 2'143'600 games
Tested by CCRL team, 2005-2019, http://ccrl.chessdom.com/ccrl/404/

Rank               Engine                Elo   +    -   Score  AvOp  Games
Naum 4.6 64-bit 4CPU               3153  +11  -11  38.6%  +83.6  2997
  Naum 4.2 64-bit 4CPU               3099   +8   -8  51.1%   -7.3  5700
  Naum 4.1 64-bit 4CPU               3070  +15  -15  61.0%  -76.7  1439
  Naum 4 64-bit 4CPU                 3061  +10  -10  64.3% -105.6  3634
  Naum 4.6 64-bit                    3032   +7   -8  45.6%  +32.6  6925
  Naum 4.2 64-bit                    2987   +8   -8  45.1%  +33.0  5682
  Naum 3 64-bit 4CPU                 2986  +12  -12  59.6%  -64.9  2483
  Naum 3.1 64-bit 4CPU               2978  +10  -10  57.7%  -51.5  3386
  Naum 4.1 64-bit                    2955  +17  -17  61.7%  -80.2  1162
  Naum 4 64-bit                      2948  +13  -13  62.5%  -88.8  2158
  Naum 2.2 64-bit 4CPU               2908  +13  -13  54.2%  -28.0  1873
  Naum 3.1 64-bit                    2863  +14  -14  50.2%   -2.2  1827
  Naum 3 64-bit                      2854  +17  -17  49.3%   +5.2  1256
  Naum 2.1 64-bit 4CPU               2846  +19  -19  52.1%  -13.2   916
  Naum 2.2 64-bit                    2784  +21  -21  45.7%  +28.1   760
  Naum 2.2 32-bit                    2770  +15  -15  56.2%  -43.3  1597
  Naum 2.1 64-bit                    2761  +20  -21  45.0%  +33.9   776
  Naum 2.1 32-bit                    2738  +14  -14  51.0%   -8.3  1826
  Naum 2.0 32-bit                    2700   +8   -8  51.7%  -15.1  6692
  Naum 2.0 64-bit                    2693  +11  -11  47.8%  +20.9  2946
  Naum 1.91 32-bit                   2607  +19  -19  43.2%  +53.3   975

Created in 2005-2013 by CCRL team
Last games added on December 7, 2019