CCRL 40/40
Downloads and Statistics
August 24, 2019
Testing summary:
Total: 1'077'764 games
played by 2'521 programs
147276 CPU days (X2 4600+)

White wins: 374'201 (34.7%)
Black wins: 278'337 (25.8%)
Draws: 425'226 (39.5%)
White score: 54.4%

Custom engine selection

Comparing 15 engines!
15 selected engines played 12 games with each other



CCRL 40/40 Rating List - Custom engine selection
1077764 games played by 2521 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 24, 2019 with Bayeselo based on 1'077'764 games
Tested by CCRL team, 2005-2019, http://computerchess.org.uk/ccrl/4040/

Rank              Engine                Elo   +    -   Score  AvOp  Games
Zappa Mexico II 64-bit 4CPU       2969  +10  -10  48.3%   +9.7  3270
  Zappa Mexico 64-bit 4CPU          2960  +15  -15  60.4%  -68.3  1422
  Zap!Chess Zanzibar 64-bit 4CPU    2948  +23  -23  64.1%  -88.0   598
  Zappa Mexico II 64-bit            2855  +10  -10  47.2%  +18.4  3598
  Zap!Chess Paderborn 64-bit 4CPU   2849  +26  -26  65.9% -106.0   492
  Zappa Mexico 64-bit               2832  +15  -15  53.5%  -23.4  1344
  Zappa Mexico II 32-bit            2809  +12  -12  48.3%  +11.7  2392
  Zap!Chess Zanzibar 64-bit         2803  +26  -26  54.0%  -24.3   429
  Zappa Mexico 32-bit               2789  +17  -17  53.9%  -23.5  1098
  Zap!Chess Zanzibar 32-bit         2781  +19  -19  55.7%  -38.0   873
  Zap!Chess Paderborn 32-bit        2682  +21  -21  45.1%  +33.9   731
  Zap!Chess Paderborn SE 32-bit     2670  +34  -34  46.0%  +25.7   275
  Zap!Chess Reykjavik 32-bit        2658  +34  -35  38.1%  +76.6   274
  Zappa 1.1 64-bit                  2615  +18  -18  48.1%  +12.8  1010
  Zappa 1.1 32-bit                  2581  +29  -29  49.9%   +1.5   411

Created in 2005-2013 by CCRL team
Last games added on August 24, 2019