The purpose of our rating lists is provide engine authors and enthusiasts with a general comparison of engine strength. We also provide other data that could be of interest.
For various reasons, there may be some engines that do not appear on our lists, therefore it is useful to look at other rating lists as well as ours.
The inclusion or exclusion of engines in our lists should not be taken as our group making a statement about their legality or status. However, where there is controversy surrounding an engine in our lists, we have indicated this.
We test chess engines for our own enjoyment and receive no payment for doing so.

The latest CCRL Rating Lists and Statistics are available for viewing from the following links:
http://computerchess.org.uk/ccrl/4040.live/ (40/40)
http://www.computerchess.org.uk/ccrl/404.live/ (40/4)
http://www.computerchess.org.uk/ccrl/404FRC/ (FRC 40/4)

Please note that the three lists are often updated separately to each other.
The links given in each update report will give you the currently up to date lists.

The links to the various rating lists can be found just beneath the default Best Versions list (as in this screenshot). Specific 32-bit rating lists are denoted as such to the right of the default list in each category. The default lists contain the 64-bit engines.



Our 40 moves in 40 minutes repeating and 40 moves in 4 minutes repeating are both adjusted to the AMD64 X2 4600+ (2.4GHz).

Be aware that in the early stages of testing, an engine's rating can often fluctuate a lot.
It is strongly advised to look at the many other rating lists available in order to get a more accurate overall picture of an engine's rating relative to others.

The LOS (likelihood of superiority) stats to the right hand side of each rating list tell you the likelihood in percentage terms of each engine being superior to the engine directly below them.

All games are available for download by engine, by month or by ECO code, but you will need to remove the .live from the links if you wish to access these (for example http://computerchess.org.uk/ccrl/4040 ). The download databases by month or ECO code are only updated monthly, but the total games database in its entirety is always available.
The current ELO ratings are saved in all game databases for those engines that have 200 games or more.

Clicking on an engine name will give details as to opponents played plus homepage links where applicable.

Custom lists of engines can be selected for comparison.

An openings report page lists the number of games played by ECO codes with draw percentage and White win percentage. Clicking on a column heading will sort the list by that column.


40/40 games submitted this week
Adam 3.3 -> 12
Alaric 0702b -> 6
Alaric 707 -> 4
Alfil 8.1.1 -> 28
AliChess 4.25 -> 12
Amyan 1.72 -> 24
Arasan 13.0 64-bit -> 144
Arasan 13.1 32-bit -> 105
Ares 1.004 -> 30
Aristarch 4.50 -> 6
Bagatur 1.2 32-bit -> 1
Bearded 06_29_02 -> 2
Bison 9.11 -> 40
Bobcat 2.75 32-bit -> 38
Bobcat 2.75 64-bit -> 24
Booot 5.1.0 -> 30
Bright 0.2c -> 12
Bright 0.5c -> 26
Bruja 1.9.1 64-bit -> 24
Brutus 7.02b -> 12
BugChess2 1.9 32-bit -> 32
Butcher 1.61 32-bit -> 22
CM10th Default -> 8
CM10th Paralyse -> 2
CM10th Warrior -> 2
Carballo 0.5 32-bit -> 2
Chaturanga 2.4.3 -> 10
Cheng3 1.04 32-bit -> 12
Cheng3 1.05 32-bit -> 3
Chesley r323 -> 2
Chess Tiger 15 -> 6
Chess Tiger 2007 -> 4
Chess Tiger 2007.1 -> 16
ChessKiss 1.3 -> 2
Chessmaster 11 Archangel -> 12
Chessmaster 11 Conqueror -> 26
Chronos 1.9.9 32-bit -> 30
Chronos 1.9.9 64-bit -> 24
Colossus 2008b -> 6
Crafty 22.8 32-bit -> 2
Crafty 23.1 32-bit -> 8
Crafty 23.4 32-bit -> 39
Critter 1.2 32-bit -> 26
Critter 1.2 64-bit -> 86
Critter 1.2 64-bit 4CPU -> 83
Critter 1.2 64-bit SSE -> 16
CuckooChess 1.11 -> 2
Cyrano 0.6b17 -> 10
DanaSah 4.66 -> 127
Daydreamer 1.75 32-bit -> 16
Deep Junior 12.5 32-bit 1CPU -> 8
Deep Shredder 12 64-bit OA On 4CPU -> 32
Deep Sjeng c't 2010 -> 10
Delfi 5.4 -> 48
Delphil 2.8 -> 226
Deuterium 11.01.28.159 -> 30
Dirty 24Apr2011 32-bit -> 6
Dirty 25Aug2011 32-bit -> 38
Dirty 25Aug2011 64-bit -> 24
DoubleCheck 1.4 32-bit -> 2
E.T. Chess 13.01.08 -> 6
FireFly 2.5.13 32-bit -> 2
Frenzee 3.0 -> 4
Frenzee Feb08 32-bit -> 16
Gandalf 6 -> 9
GarboChess 3.0 32-bit -> 2
Gaviota 0.83 32-bit -> 2
Gaviota 0.84 32-bit -> 2
Ghost 2.0.1 -> 30
Glass 1.7 32-bit -> 18
Glass 1.7 64-bit -> 24
Glaurung 1.0.2 32-bit -> 14
Gull 1.0a 32-bit -> 8
Gull 1.2 32-bit -> 32
Hamsters 0.7.1 -> 2
Hannibal 1.1 32-bit -> 30
Hermann 2.8 64-bit -> 48
Hiarcs 13.2 -> 8
Hiarcs 13.2 4CPU -> 224
Hiarcs 9 -> 6
Houdini 1.5a 64-bit 4CPU -> 32
Houdini 2.0 32-bit -> 186
Houdini 2.0 64-bit 4CPU -> 103
Houdini 2.0 64-bit SSE -> 60
Jazz 444 32-bit -> 14
Jonny 4.00 -> 46
KMTChess 1.2.1 32-bit -> 2
KnockOut 0.7.1 -> 1
Komodo 3 32-bit -> 28
Ktulu 8 -> 6
Ktulu 9 -> 12
Kurt 0.9.2 32-bit -> 2
LittleThought 1.052 64-bit -> 24
Loop 13.6 (Loop 2007) 32-bit -> 12
Movei 00.8.438 (10 10 10) -> 4
N2 0.4 32-bit -> 4
N2 0.4 64-bit -> 24
Naraku 1.4 -> 28
Naum 1.91 32-bit -> 15
Naum 4.2 32-bit -> 10
Naum 4.2 64-bit -> 14
Onno 1.2.70 32-bit -> 2
Onno 1.2.70 64-bit -> 24
Pawny 0.3 32-bit -> 30
Petir 4.999999 -> 4
Pharaon 3.5.1 -> 2
Plisk 0.2.7d 32-bit -> 30
Pro Deo 1.1 -> 7
Pro Deo 1.6 -> 2
Protector 1.4.0 32-bit -> 32
Protector 1.4.0 64-bit 4CPU -> 32
Pseudo 0.7c -> 24
RedQueen 1.0.0 32-bit -> 147
Rodin 4.0 -> 32
Rotor 0.6 -> 22
Ruffian 2.1.0 -> 6
Rybka 2.3.2a 32-bit -> 12
Rybka 4.1 32-bit -> 9
Rybka 4.1 64-bit -> 84
Rybka 4.1 64-bit 4CPU -> 32
SOS 5.1 -> 48
Scorpio 2.0 -> 8
Scorpio 2.7 32-bit -> 32
Scorpio 2.7 64-bit -> 216
Shredder 12 32-bit OA Off -> 9
Shredder 12 32-bit OA On -> 10
Sloppy 0.2.3 32-bit -> 4
Slow Chess Blitz WV2 -> 14
Slow Chess Blitz WV2.1 -> 4
SmarThink 1.00 32-bit -> 6
SmarThink 1.20 32-bit -> 12
SmarThink 1.20 64-bit -> 24
Spark 1.0 32-bit -> 30
SpiderChess 070603 -> 24
Spike 1.4 Leiden -> 28
Stockfish 2.1.1 32-bit -> 28
Stockfish 2.1.1 64-bit 4CPU -> 84
Tao 5.6 -> 24
Thinker 5.4D Inert 32-bit -> 30
Toga II 3.1.2SE -> 2
Tornado 2.2 -> 10
Tornado 4.4 32-bit -> 32
Trace 1.36 -> 24
Twisted Logic 0.085 -> 6
Twisted Logic 20100131x 32-bit -> 28
Twisted Logic 20100131x 64-bit -> 24
Ufim 8.02 -> 72
Umko 1.2 32-bit -> 20
WildCat 8 -> 6
Xpdnt 091007 -> 24
Yace 0.99.87 -> 24
Zappa Mexico II 32-bit -> 2
Zappa Mexico II 64-bit 4CPU -> 32


40/4 games submitted this week
ALChess 1.5b -> 62
Abrok 5.0 -> 32
Adamant 1.7 -> 63
Aice 0.99.2 -> 32
AjedrezTatico 2.73b -> 30
Alaric 707 -> 31
Alarm 0.93.1 -> 34
Aldebaran 0.7.0 -> 58
Alf 1.09 -> 34
Alfil 8.1.1 Optimized -> 32
Amateur 2.82 -> 32
Amyan 1.72 -> 32
AnMon 5.75 -> 64
Anechka 0.08 -> 65
Ant 2006-F -> 66
Arion 1.7 -> 32
Aristarch 4.50 -> 32
Atak 6.8 -> 32
Atlas 2.20 -> 66
Ax 0.8 -> 34
Ayito 0.2.994 -> 66
BSC 3.9 -> 701
Bace 0.45 -> 93
Beaches 2.32 -> 64
Bearded 06-29 -> 64
Belzebub 0.67 -> 59
Bestia 0.90 -> 98
BigLion 2.23x -> 63
Bison 9.11 64-bit -> 32
BlackBishop 1.0 -> 64
Bodo 0.2b -> 34
Bright 0.5c -> 32
Bruja 1.9 64-bit JA No-int-book -> 32
Brutus 8.05 64-bit -> 32
BugChess2 1.9 64-bit -> 64
Cecir 3.5 -> 64
Cerebro 3.03d -> 31
Chenard 2010.08.23 64-bit -> 1037
Cheng3 1.03 64-bit -> 30
ChessMind 0.80 -> 64
Chispa 4.0.3 -> 66
Chronos 1.9.9 64-bit -> 32
Clarabit 1.00 64-bit -> 33
Clueless V1.4 -> 63
Colossus 2008b -> 32
CyberPagno 2.1 -> 34
Cyrano 06b17 64-bit -> 32
DChess 1.0.2 -> 30
DanaSah 4.24 -> 32
Daydreamer 1.75 64-bit -> 32
Delfi 5.4 -> 32
Dolphin 1.0 -> 32
Dorky 3.48 -> 34
Dorky 4.3 64-bit 2CPU -> 445
DoubleCheck 1.4 64-bit -> 606
Dragon 4.6 -> 32
EXchess 5.01b 64-bit -> 34
Elf 1.3.0 -> 62
Embracer 1.12 -> 64
Esc 1.16 -> 34
Fortress 1.62 -> 98
GChess IV 0.2.0 -> 685
GK 0.90 64-bit -> 34
GNU Chess 5.07.173b 64-bit -> 1210
Gaia 3.5 64-bit -> 32
GarboChess 2.20 64-bit -> 32
Genesis 2.0 -> 34
Gerbil 0.2 64-bit -> 64
Ghost 0.14 -> 34
Glass 1.7 64-bit -> 31
GreKo 8.0 -> 32
Green Light Chess 3.01.2.2 -> 64
Hamsters 0.71 -> 32
Hussar 0.4 -> 32
InmiChess3.06N -> 34
JanWillem 1.13 -> 32
Joker 1.1.14 -> 32
Jonny 4.00 -> 32
KnockOut 0.7.1 32-bit -> 64
Ktulu 4.2 -> 29
LambChop 10.99 -> 31
Larsen VB 0.05.0001 -> 30
Latista (Sinobyl) 1.5 -> 65
Laurifer 1.0 -> 32
Lime 66 -> 32
List 5.12 -> 32
Little Goliath Evolution 3.12 -> 64
Loop 13.6 (Loop 2007) 32-bit -> 63
MSCP 1.44 -> 30
Madeleine 0.2 -> 34
Marvin 1.3.0 -> 63
Matacz 1.4 -> 32
Matheus 2.3 -> 66
Matilde 2008 64-bit -> 34
Micro-Max 4.8 -> 64
MiniMardi 1.3 -> 30
Mizar 3.0 -> 30
Monarch 1.7 -> 97
Morphy 3.22 -> 31
Movei 00.8.438 (10 10 10) -> 32
N2 0.4 64-bit -> 32
NagaSkaki 5.12 -> 1219
NanoSzachy 3.8 -> 32
Natwarlal 0.14 -> 34
Naum 2.0 32-bit -> 32
Needle 0.531 -> 30
Nejmet 3.07 -> 30
Nesik 0.7.0 alpha -> 34
Parrot 070722 -> 34
Pawny 0.3 64-bit -> 316
Petir 4.999999 -> 31
Pharaon 3.5.1 -> 32
Philou 3.60 -> 32
Piranha 0.5 -> 30
Predateur 2.1 64-bit -> 93
Purple Haze 2.0 -> 30
Quark 2.35 -> 32
RDChess 3.23 -> 34
Robin 0.983 -> 61
Roce 0.0390 -> 94
Rocinante 1.01 64-bit -> 30
Rodin 4.0 -> 2
Rotor 0.6 -> 32
SEE 0.6.9 -> 59
SOS 5.1 -> 32
Scorpio 2.7 64-bit -> 32
Sloppy 0.2.2 64-bit -> 32
Slow Chess Blitz WV2.1 -> 32
SmarThink 0.17a -> 32
Smash 1.0.3 -> 64
SnailChess 4.013 -> 64
Soldat 0.25b -> 31
SpiderChess 070603 -> 31
Storm 0.6 -> 29
Sunsetter 10.3 64-bit -> 34
Surprise 4.3b13 -> 62
The Baron 2.23 64-bit -> 32
Trace 1.37a -> 32
Tscp 1.81 -> 62
Twisted Logic 20090922 64-bit -> 32
Ufim 8.02 -> 64
Umko 0.9 64-bit -> 32
Uragano 3D 0.87 -> 34
Uralochka 1.1b -> 34
WJChess 1.64 -> 34
Warrior 1.0.3 -> 63
WildCat 8 -> 32
Wing 2.0a -> 66
Yace 0.99.87 -> 31
Zappa 1.1 64-bit -> 32
Zeus 1.29 -> 34
Zotron 4.4.6 -> 29