CCRL 40/4
Downloads and Statistics
June 22, 2019
Testing summary:
Total: 2'052'494 games
played by 2'371 programs
27529 CPU days (X2 4600+)

White wins: 797'533 (38.9%)
Black wins: 645'585 (31.5%)
Draws: 609'376 (29.7%)
White score: 53.7%

Engine Details

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Butter 1.0 64-bit in CCRL 40/4, 2019-06-22
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 Intel CPU.
Tested by CCRL team, 2005-2019, http://computerchess.org.uk/ccrl/404/

CCRL 40/4 main list:
Butter 1.0 64-bit is #449 with rating of 1865 Elo points (+20 -20),
based on 1045 games: 489 wins, 395 losses and 161 draws
Score: 54.5%, Average opponent: −36.4, Draws: 15.4%


Pairwise results:
     Opponent                         Elo     Score                  LOS   Perf
 - Axolotl 1.5 64-bit                 2137   0.5-7.5   (+0 -7 =1 )    0.0  -137
 - Oberon 0.04                        2013   6.5-20.5  (+5 -19=3 )    0.0   -70
 - Schola 1.1.0 64-bit                2012  10.0-22.0  (+7 -19=6 )    0.0    +5
 - Goldfish 1.13.0 64-bit             1996  11.5-20.5  (+7 -16=9 )    0.0   +32
 - Bubble 1.5                         1987   7.0-22.0  (+5 -20=4 )    0.0   -86
 - BeLL 0.0.41 64-bit                 1937  18.0-14.0  (+13-9 =10)    0.0  +115
 - Fairy-Max 5.0b3                    1918  21.0-19.0  (+18-16=6 )    0.0   +73
 - Fairy-Max 5.0b                     1891  19.0-21.0  (+15-17=8 )    3.5    +7
 - Tyrell 1.02                        1887   9.5-16.5  (+9 -16=1 )    6.2   -95
 - MrChess 2.1                        1886  18.5-29.5  (+15-26=7 )    5.3   -69
 - Purple Haze 2.1.0                  1884  13.5-12.5  (+11-10=5 )    5.3   +26
 - Presbyter 1.3.0 64-bit             1867  28.0-27.0  (+24-23=8 )   45.2    +9
 - Deepov 0.4.1 64-bit                1847  16.5-10.5  (+14-8 =5 )   91.1   +63
 - Sayuri 2018.03.06 64-bit           1838  16.5-15.5  (+14-13=5 )   97.0   -17
 - HeavyChess 0.13 beta               1834  13.5-8.5   (+10-5 =7 )   99.0   +40
 - Skiull 0.3 64-bit                  1830  11.5-9.5   (+8 -6 =7 )   99.2    -1
 - Ziggurat 0.18 64-bit               1819  10.0-12.0  (+8 -10=4 )   99.9   -82
 - Chenard 2015.08.14 64-bit          1816  14.0-11.0  (+13-10=2 )   98.8    +3
 - Sayuri 2018.05.23 64-bit           1807  15.5-16.5  (+14-15=3 )  100.0   -69
 - Pigeon 1.5.1 64-bit                1800  12.5-8.5   (+11-7 =3 )  100.0    +5
 - Enigma 1.1.4                       1793  20.0-8.0   (+19-7 =2 )  100.0  +109
 - Bremboce 0.6.2                     1792  17.5-10.5  (+16-9 =3 )  100.0   +27
 - AdaChess 3.1 64-bit                1791  15.5-16.5  (+14-15=3 )  100.0   -85
 - MOBMAT 0.903d 64-bit               1790  15.5-13.5  (+15-13=1 )  100.0   -45
 - Embracer 1.12                      1785   9.5-13.5  (+7 -11=5 )  100.0  -149
 - Fauce 0.41c                        1782  15.0-6.0   (+14-5 =2 )  100.0   +89
 - Sapeli 1.0 64-bit                  1781  16.5-15.5  (+14-13=5 )  100.0   -69
 - Lodocase 240208                    1761  17.0-12.0  (+14-9 =6 )  100.0   -37
 - Sayuri 2017.16.12 64-bit           1752  18.5-8.5   (+16-6 =5 )  100.0   +25
 - Zzzzzz 3.51                        1730  17.5-6.5   (+16-5 =3 )  100.0   +46
 - AdaChess 3.4 64-bit                1727  21.0-10.0  (+20-9 =2 )  100.0   +12
 - Ceibo 0.3.65 64-bit                1724  23.0-5.0   (+19-1 =8 )  100.0   +87
 - Tristram 4.16                      1711  22.5-7.5   (+21-6 =3 )  100.0   +55
 - Tom Thumb 0.2 64-bit               1672  33.0-7.0   (+30-4 =6 )  100.0   +73
 - Tom Thumb 0.1 64-bit               1619  34.5-11.5  (+33-10=3 )  100.0   -31


Created in 2005-2013 by CCRL team
Last games added on June 22, 2019