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 4 engines!
4 selected engines played 0 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
Simplex 0.9.8 64-bit              2399  +17  -17  47.3%  +18.3  1226
  Simplex 0.9.8 32-bit              2396  +30  -30  49.0%   +5.8   359
  Simplex 0.9.7 32-bit              2323  +31  -31  48.6%   +9.3   370
  Simplex 0.9.3 32-bit              2167  +34  -34  49.5%   +3.6   303

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