CCRL 40/4
Downloads and Statistics
November 8, 2019
Testing summary:
Total: 2'127'795 games
played by 2'486 programs
28766 CPU days (X2 4600+)

White wins: 825'412 (38.8%)
Black wins: 667'151 (31.4%)
Draws: 635'232 (29.9%)
White score: 53.7%

Engine Details

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Butter 1.0 64-bit in CCRL 40/4, 2019-11-08
Ponder off, General book (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.
Tested by CCRL team, 2005-2019, http://ccrl.chessdom.com/ccrl/404/

CCRL 40/4 main list:
Butter 1.0 64-bit is #460 with rating of 1864 Elo points (+19 -19),
based on 1109 games: 511 wins, 430 losses and 168 draws
Score: 53.7%, Average opponent: −29.0, Draws: 15.1%


Pairwise results:
     Opponent                         Elo     Score                  LOS   Perf
 - Axolotl 1.5 64-bit                 2138   0.5-7.5   (+0 -7 =1 )    0.0  -135
 - Oberon 0.04                        2013   6.5-20.5  (+5 -19=3 )    0.0   -69
 - Schola 1.1.0 64-bit                2012  10.0-22.0  (+7 -19=6 )    0.0    +6
 - Goldfish 1.13.0 64-bit             1992  11.5-20.5  (+7 -16=9 )    0.0   +29
 - Bubble 1.5                         1987   7.0-22.0  (+5 -20=4 )    0.0   -85
 - Jacksprat 1.0 64-bit               1966   8.5-23.5  (+7 -22=3 )    0.0   -93
 - BeLL 0.0.41 64-bit                 1938  18.0-14.0  (+13-9 =10)    0.0  +117
 - Fairy-Max 5.0b3                    1918  21.0-19.0  (+18-16=6 )    0.0   +74
 - Tony's Chess 0.03                  1913  17.0-15.0  (+15-13=4 )    0.0   +71
 - Fairy-Max 5.0b                     1891  19.0-21.0  (+15-17=8 )    3.1    +8
 - Tyrell 1.02                        1887   9.5-16.5  (+9 -16=1 )    5.8   -94
 - MrChess 2.1                        1884  18.5-29.5  (+15-26=7 )    6.1   -70
 - Purple Haze 2.1.0                  1884  13.5-12.5  (+11-10=5 )    4.3   +27
 - Presbyter 1.3.0 64-bit             1866  28.0-27.0  (+24-23=8 )   45.0    +9
 - Deepov 0.4.1 64-bit                1850  16.5-10.5  (+14-8 =5 )   88.2   +67
 - Sayuri 2018.03.06 64-bit           1839  16.5-15.5  (+14-13=5 )   96.8   -15
 - Skiull 0.3 64-bit                  1834  11.5-9.5   (+8 -6 =7 )   98.7    +3
 - HeavyChess 0.13 beta               1834  13.5-8.5   (+10-5 =7 )   99.0   +41
 - Ziggurat 0.18 64-bit               1819  10.0-12.0  (+8 -10=4 )   99.9   -81
 - Chenard 2015.08.14 64-bit          1816  14.0-11.0  (+13-10=2 )   98.8    +4
 - Sayuri 2018.05.23 64-bit           1805  15.5-16.5  (+14-15=3 )  100.0   -70
 - Pigeon 1.5.1 64-bit                1800  12.5-8.5   (+11-7 =3 )  100.0    +6
 - Enigma 1.1.4                       1793  20.0-8.0   (+19-7 =2 )  100.0  +110
 - Bremboce 0.6.2                     1792  17.5-10.5  (+16-9 =3 )  100.0   +28
 - AdaChess 3.1 64-bit                1791  15.5-16.5  (+14-15=3 )  100.0   -84
 - MOBMAT 0.903d 64-bit               1790  15.5-13.5  (+15-13=1 )  100.0   -44
 - Embracer 1.12                      1785   9.5-13.5  (+7 -11=5 )  100.0  -148
 - Fauce 0.41c                        1782  15.0-6.0   (+14-5 =2 )  100.0   +90
 - Sapeli 1.0 64-bit                  1780  16.5-15.5  (+14-13=5 )  100.0   -69
 - Lodocase 240208                    1761  17.0-12.0  (+14-9 =6 )  100.0   -36
 - Sayuri 2017.16.12 64-bit           1751  18.5-8.5   (+16-6 =5 )  100.0   +25
 - Zzzzzz 3.51                        1730  17.5-6.5   (+16-5 =3 )  100.0   +47
 - AdaChess 3.4 64-bit                1727  21.0-10.0  (+20-9 =2 )  100.0   +13
 - Ceibo 0.3.65 64-bit                1724  23.0-5.0   (+19-1 =8 )  100.0   +88
 - Tristram 4.16                      1711  22.5-7.5   (+21-6 =3 )  100.0   +56
 - Tom Thumb 0.2 64-bit               1675  33.0-7.0   (+30-4 =6 )  100.0   +77
 - Tom Thumb 0.1 64-bit               1619  34.5-11.5  (+33-10=3 )  100.0   -30


Created in 2005-2013 by CCRL team
Last games added on November 8, 2019