CCRL 40/40
Downloads and Statistics
January 20, 2018
Testing summary:
Total: 783'129 games
played by 2'026 programs
108312 CPU days (X2 4600+)

White wins: 268'533 (34.3%)
Black wins: 198'801 (25.4%)
Draws: 315'795 (40.3%)
White score: 54.5%

Engine Details

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Stockfish 1.9.1 64-bit 4CPU in CCRL 40/40, 2018-01-20
Ponder off, General book (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.
Tested by CCRL team, 2005-2018, http://computerchess.org.uk/ccrl/4040/

CCRL 40/40 main list:
Stockfish 1.9.1 64-bit 4CPU has no rank with rating of 3116 Elo points (+24 -23),
based on 570 games: 223 wins, 84 losses and 263 draws
Score: 62.2%, Average opponent: −81.8, Draws: 46.1%


Pairwise results:
     Opponent                         Elo     Score                  LOS   Perf
 - Houdini 1.5a 64-bit 4CPU           3192  16.5-32.5  (+4 -20=25)    0.0   -21
 - Rybka 4 64-bit 4CPU                3154  33.0-43.0  (+15-25=36)    0.2     0
 - Rybka 4.1 64-bit 4CPU              3151  11.5-20.5  (+3 -12=17)    0.4   -49
 - Stockfish 1.8 64-bit 4CPU          3109  15.0-18.0  (+3 -6 =24)   67.0   -31
 - Critter 0.90 64-bit 4CPU           3084  19.5-14.5  (+9 -4 =21)   95.0    +9
 - Naum 4.2 64-bit 4CPU               3067  29.5-18.5  (+17-6 =25)  100.0   +19
 - Deep Shredder 12 64-bit 4CPU       3024  26.5-13.5  (+18-5 =17)  100.0   +10
 - Zappa Mexico II 64-bit 4CPU        2973  46.5-19.5  (+29-2 =35)  100.0   -23
 - Deep Sjeng WC2008 64-bit 4CPU      2930  52.5-14.5  (+40-2 =25)  100.0    +3
 - Thinker 5.4c Inert 64-bit 4CPU     2927  63.5-12.5  (+52-1 =23)  100.0   +52
 - Bright 0.5c 4CPU                   2897  40.5-8.5   (+33-1 =15)  100.0   +14


Created in 2005-2013 by CCRL team
Last games added on January 20, 2018