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 18 engines!
18 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
NirvanaChess 2.4 64-bit 4CPU      3180  +14  -14  40.6%  +62.7  1676
  NirvanaChess 2.3 64-bit 4CPU      3152  +18  -18  41.4%  +55.4   869
  NirvanaChess 2.2 64-bit 4CPU      3139  +18  -17  40.7%  +59.6   961
  NirvanaChess 2.4 64-bit           3101   +9   -9  44.3%  +39.0  3908
  NirvanaChess 2.1c 64-bit 4CPU     3095  +22  -23  45.2%  +31.6   608
  NirvanaChess 2.3 64-bit           3073  +13  -13  44.2%  +38.7  1962
  NirvanaChess 2.2 64-bit           3063  +14  -14  45.9%  +27.0  1620
  NirvanaChess 2.0a 64-bit 4CPU     3056  +30  -30  44.7%  +35.8   337
  NirvanaChess 2.1c 64-bit          3022  +23  -23  49.7%   +1.9   564
  NirvanaChess 2.0a 64-bit          2985  +24  -23  54.2%  -26.7   561
  NirvanaChess 1.8 64-bit           2828  +25  -25  49.3%   +3.0   500
  NirvanaChess 1.5 64-bit           2822  +29  -29  47.3%  +17.7   372
  NirvanaChess 1.6 64-bit           2821  +27  -27  49.1%   +7.4   409
  NirvanaChess 1.7 64-bit           2812  +31  -31  48.6%  +11.8   327
  NirvanaChess 1.4 64-bit           2763  +29  -30  47.1%  +17.5   360
  NirvanaChess 1.3 64-bit           2748  +31  -31  49.0%   +7.9   342
  NirvanaChess 1.2 64-bit           2702  +30  -30  48.2%  +10.9   333
  NirvanaChess 1.1 64-bit           2549  +26  -26  51.1%  -14.3   532

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