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
Abrok 5.0 -> 4
Alaric 0702b -> 6
Alex 1.96 -> 4
Alfil 8.1.1 -> 25
AliChess 4.20 -> 10
Amy 0.87b -> 7
Amyan 1.72 -> 24
Arasan 13.2 32-bit -> 13
Arasan 13.3 32-bit -> 10
Ares 1.004 -> 7
Atak 6.2 -> 4
Atlas 3.14b 32-bit -> 4
BSC 3.9+ 32-bit -> 14
Bagatur 1.2b 32-bit -> 12
Bearded N44.2 -> 4
Betsabe II 1.08c -> 58
Betsabe II 1.09c -> 6
BigLion 2.23x -> 15
BikJump 2.01 -> 14
Bison 9.11 -> 18
Bison 9.6 -> 6
Bobcat 2.75 32-bit -> 19
Booot 4.10.1 -> 2
Booot 4.15.1 -> 2
Booot 5.1.0 -> 26
Bright 0.3a -> 6
Bruja 1.9.1 32-bit -> 4
Brutus 6.0 -> 4
Brutus 7.02b -> 9
Bubble 1.5 -> 25
BugChess2 1.9 32-bit -> 18
CM10th Default -> 4
CM10th Pestilence -> 2
Carballo 0.5 32-bit -> 15
Cheng3 1.04 32-bit -> 8
Cheng3 1.05 32-bit -> 4
Chess Tiger 2007 -> 7
ChessKiss 1.3a -> 20
ChessMind 0.82 -> 14
Chessmaster 11 -> 5
Chiron 1.1 32-bit -> 19
Chiron 1.1 64-bit -> 23
Chronos 1.9.9 32-bit -> 18
Clarabit 1.00 -> 15
Clueless 1.4 -> 10
Counter 0.8 -> 2
Crafty 23.1 32-bit -> 4
Crafty 23.4 32-bit -> 18
Critter 1.2 32-bit -> 38
Critter 1.2 64-bit -> 23
CuckooChess 1.12 -> 74
Cyrano 0.6b17 -> 1
Daydreamer 1.75 32-bit -> 18
Deep Junior 12.5 32-bit 1CPU -> 7
Deep Sjeng c't 2010 -> 20
Delphil 2.3 -> 2
Deuterium 11.01.28.159 -> 1
Diablo 0.5.1 -> 4
Dirty 0.99z -> 2
Dirty 25Aug2011 32-bit -> 19
Dirty 6J-22 -> 7
Djinn 0.925x -> 7
Dorky 4.3 32-bit -> 7
DoubleCheck 2.1 32-bit -> 105
Dragon 4.6 -> 7
E.T. Chess 13.01.08 -> 2
EveAnn 1.63 -> 4
EveAnn 1.66 -> 4
Feuerstein 0.4.5.2 -> 4
FireFly 2.5.13 32-bit -> 8
Francesca MAD 0.19 -> 243
Frenzee 3.0 -> 4
Frenzee 3.5.19 32-bit -> 18
Frenzee Feb08 32-bit -> 1
Frenzee Feb08 64-bit -> 18
Fritz 13 -> 118
GChess IV 0.2.0 -> 14
Gandalf 6 -> 1
Gaviota 0.84 32-bit -> 7
Gaviota 0.84 64-bit -> 24
Glass 0.1.0c -> 4
Glass 1.7 32-bit -> 11
Glass 1.8 32-bit -> 20
GreKo 5.2.5 -> 4
GreKo 6.30 -> 2
GreKo 8.2 32-bit -> 11
Gull 1.0a 32-bit -> 6
Gull 1.2 32-bit -> 37
Hannibal 1.1 32-bit -> 26
Hannibal 1.1 64-bit -> 18
Heracles 0.6.16 -> 10
Hermann 1.9 -> 2
Hermann 2.8 32-bit -> 4
Hiarcs 13.2 -> 4
Homer 2.01 -> 4
Horizon 4.4 -> 7
Houdini 1.5a 32-bit -> 5
Houdini 2.0 32-bit -> 2
Houdini 2.0c 32-bit -> 75
Hussar 0.4 -> 4
Ifrit m1.5 -> 51
Jabba 1.0 -> 14
Jazz 501 32-bit -> 23
Jonny 4.00 -> 18
Kiwi 0.6d -> 7
KnockOut 0.7.1 -> 14
Komodo 3 32-bit -> 39
Ktulu 8 -> 8
Kurt 0.9.2 32-bit -> 15
Kurt 271009 -> 4
LittleThought 1.04 32-bit -> 4
Marvin 1.3.0 -> 10
MatMoi 7.15.0 -> 10
Matheus 2.3 -> 10
Monarch 1.7 -> 10
Monik 2.2.3 32-bit -> 14
Myrddin 0.83 32-bit -> 4
N2 0.4 64-bit -> 24
NagaSkaki 4.00 -> 4
NanoSzachy 3.1 -> 2
NanoSzachy 3.9 -> 24
Naraku 1.4 -> 18
Naum 1.91 32-bit -> 6
Naum 4.2 32-bit -> 19
Neurosis 2.3 -> 6
PLP 1661571 -> 15
Parrot 07.01.16 -> 4
Parrot 07.07.22 -> 15
Patzer 3.80 -> 7
Pawny 0.3 32-bit -> 4
Pawny 0.3.1 32-bit -> 2
Petir 4.39 -> 24
Phalanx XXII -> 7
Philou 2.7.0 -> 4
Philou 3.60 -> 25
Popochin 2.9 -> 2
ProDeo 1.7 -> 44
ProDeo 1.73 -> 8
Prophet 2.0 -> 15
Protector 1.4.0 32-bit -> 20
Protej 0.5.7 -> 14
Pseudo 0.7c -> 1
Quazar 0.3 32-bit -> 87
Queen 4.03a -> 4
RedQueen 1.0.0 32-bit -> 2
RedQueen 1.0.0 64-bit -> 24
Reger 0.09 -> 10
RomiChess P3k 32-bit -> 4
Rybka 2.3.2a 32-bit -> 6
Rybka 4.1 32-bit -> 19
Schola 1.1.0 -> 10
Scorpio 1.81 -> 2
Scorpio 1.91 -> 4
Scorpio 2.0 -> 12
Scorpio 2.7 32-bit -> 20
Shredder 12 32-bit OA Off -> 7
Shredder 12 32-bit OA On -> 18
Simplex 0.9.8 32-bit -> 4
Slibo 0.5.1 -> 10
Sloppy 0.2.3 64-bit -> 24
Slow Chess Blitz WV2 -> 8
Smash 1.0.3 -> 10
Sorgenkind 0.4 -> 7
Spark 1.0 32-bit -> 20
Spike 1.4 Leiden -> 39
Stockfish 2.1.1 32-bit -> 38
TJchess 1.01 -> 7
The Baron 2.23 32-bit -> 1
Thinker 5.4D Inert 32-bit -> 26
Tornado 4.82 32-bit -> 23
Tornado 4.86 32-bit -> 18
Twisted Logic 20080404x -> 4
Typhoon 1.00-348 -> 4
Umko 1.2 32-bit -> 20
Warrior 1.0.3 -> 10
Waxman 2008 -> 6
WildCat 8 -> 24
iCE 0.1 -> 4
iCE 0.2 -> 7


40/4 games submitted this week
Alaric 707 -> 31
Alfil 8.1.1 Optimized -> 31
AnMon 5.75 -> 31
Booot 5.1.0 -> 31
Bright 0.5c -> 63
BugChess2 1.9 64-bit -> 32
Chess Tiger 2007.1 -> 31
Chronos 1.9.9 64-bit -> 32
Colossus 2008b -> 31
Crafty 23.4 64-bit -> 30
Critter 1.2 64-bit 4CPU -> 45
Deep Junior 12.5 64-bit -> 252
Deep Shredder 12 64-bit OA On 1CPU -> 32
Deep Shredder 12 64-bit OA On 4CPU -> 45
Deep Sjeng WC2008 64-bit 1CPU -> 63
E.T. Chess 13.01.08 -> 32
Frenzee 3.5.19 64-bit -> 32
Houdini 2.0c 64-bit 4CPU -> 358
Jonny 4.00 -> 31
Komodo 3 64-bit -> 45
Loop 13.6 (Loop 2007) 64-bit -> 63
Movei 00.8.438 (10 10 10) -> 31
Naum 4.2 64-bit -> 30
Naum 4.2 64-bit 4CPU -> 45
Pharaon 3.5.1 -> 30
ProDeo 1.71 -> 653
Protector 1.4.0 64-bit -> 31
Rybka 4.1 64-bit -> 32
Rybka 4.1 64-bit 4CPU -> 45
Scorpio 2.7 64-bit -> 31
Slow Chess Blitz WV2.1 -> 31
SmarThink 1.20 64-bit -> 30
Spark 1.0 64-bit 4CPU -> 44
Spike 1.4 Leiden 4CPU -> 44
Stockfish 2.1.1 64-bit 4CPU -> 45
Umko 1.1 64-bit -> 32
Umko 1.2 64-bit -> 31