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 -> 14
Alaric 0702b -> 2
Alaric 707 -> 24
Alex 1.96 -> 6
Alex 2.14a 32-bit -> 28
Alfil 11 -> 33
Alfil 8.1.1 -> 24
Amy 0.87b -> 14
Amyan 1.72 -> 24
Arasan 11.4 32-bit -> 2
Arasan 13.4 32-bit -> 43
Ares 1.004 -> 22
Atak 6.2 -> 4
Averno 0.81 -> 14
BSC 3.9+ 32-bit -> 8
Bagatur 1.2b 32-bit -> 2
Bearded N44.2 -> 2
Betsabe II 1.08c -> 26
Betsabe II 1.09c -> 8
BigLion 2.23w -> 8
BikJump 1.8 -> 4
Bison 9.6 -> 2
Bobcat 2.75 32-bit -> 9
Booot 4.10.1 -> 2
Booot 4.13.0 -> 4
Booot 5.1.0 -> 14
Bright 0.4a -> 2
Bright 0.5c -> 29
Brutus 6.0 -> 4
Brutus 8.05 32-bit -> 19
Bubble 1.5 -> 8
CM10th Xperience -> 6
Cheng3 1.06 32-bit -> 48
Chess Tiger 2007 -> 8
ChessKiss 1.3a -> 78
Chessmaster 11 -> 11
Chiron 1.1 32-bit -> 37
Clueless 1.4 -> 8
Colossus 2008b -> 26
Counter 0.8 -> 2
Counter 1.2 -> 22
Crafty 22.4 32-bit -> 4
Crafty 23.1 32-bit -> 6
Critter 1.2 32-bit -> 14
CuckooChess 1.12 -> 61
Cyrano 0.6b17 -> 9
DanaSah 4.66 -> 29
Deep Junior 12.5 32-bit 1CPU -> 7
Deep Sjeng c't 2010 -> 14
Delphil 2.3 -> 2
Delphil 2.8 -> 38
Deuterium 11.01.28.159 -> 27
Dirty 0.99z -> 2
Dirty 25Aug2011 32-bit -> 9
Dirty 6J-22 -> 2
Dorky 4.3 32-bit -> 28
DoubleCheck 2.1 32-bit -> 8
E.T. Chess 13.01.08 -> 2
EveAnn 1.66 -> 12
FireFly 2.5.13 32-bit -> 2
Francesca MAD 0.19 -> 40
Fritz 13 -> 95
GChess IV 0.2.0 -> 8
Gandalf 6 -> 9
GarboChess 3.0 32-bit -> 22
GarboChess 3.0 64-bit -> 24
Gaviota 0.84 32-bit -> 35
Gaviota 0.84 64-bit -> 48
Ghost 2.0.1 -> 14
Glass 1.8 32-bit -> 51
Glass 1.8 64-bit -> 216
Godel 2.05 32-bit -> 93
GreKo 5.2.5 -> 4
GreKo 6.30 -> 2
Green Light Chess 3.01.2.2 -> 16
Gull 1.0a 32-bit -> 15
Gull 1.2 32-bit -> 24
Gull 1.2 64-bit -> 32
Hamsters 0.0.6 -> 6
Hannibal 1.1 32-bit -> 24
Heracles 0.6.16 -> 8
Hermann 1.9 -> 2
Hermann 2.8 32-bit -> 22
Hiarcs 13.2 -> 7
Hiarcs 13.2 4CPU -> 224
Houdini 2.0 64-bit 4CPU -> 52
Houdini 2.0c 32-bit -> 231
Hussar 0.4 -> 16
Ifrit j2.9 -> 4
Ifrit j4.3 -> 8
Ifrit m1.5 -> 40
Jazz 501 32-bit -> 2
Komodo 3 32-bit -> 14
Ktulu 8 -> 8
Kurt 271009 -> 6
LittleThought 1.04 32-bit -> 2
LoopList 6.00 -> 2
Marvin 1.3.0 -> 8
MatMoi 7.15.0 -> 8
Matheus 2.3 -> 8
Mediocre 0.4 -> 28
Monarch 1.7 -> 8
Monik 2.2.3 32-bit -> 8
Movei 00.8.438 -> 2
Murka 2.0 32-bit -> 64
N2 0.4 32-bit -> 22
NanoSzachy 3.1 -> 2
NanoSzachy 3.9 -> 38
Naum 4.2 32-bit -> 14
Naum 4.2 64-bit 4CPU -> 32
Neurosis 2.3 -> 2
Onno 1.2.70 64-bit 4CPU -> 32
Patzer 3.80 -> 14
Pawny 0.3.1 32-bit -> 51
Petir 4.999999 -> 16
Philou 2.7.0 -> 2
Philou 3.60 -> 67
Plisk 0.2.7d 32-bit -> 14
Popochin 2.9 -> 2
ProDeo 1.74 -> 284
Protector 1.4.0 32-bit -> 55
Protector 1.4.0 64-bit -> 29
Protector 1.4.0 64-bit 4CPU -> 32
Protej 0.5.7 -> 8
Pupsi2 0.08 -> 16
Quazar 0.3 32-bit -> 55
RedQueen 1.0.0 32-bit -> 20
RedQueen 1.0.0 64-bit -> 24
Reger 0.09 -> 8
Rodin 4.0 -> 47
Rotor 0.6 -> 19
Rybka 2.3.2a 32-bit -> 14
Rybka 4.1 32-bit -> 14
Rybka 4.1 64-bit 4CPU -> 52
SOS 5.1 -> 40
Schola 1.1.0 -> 8
Scorpio 1.91 -> 2
Scorpio 2.0 -> 4
Shredder 12 32-bit OA Off -> 8
Shredder 12 32-bit OA On -> 6
Simplex 0.9.8 32-bit -> 34
Sjakk 1.1.8 -> 14
Slibo 0.5.1 -> 16
Sloppy 0.2.3 64-bit -> 48
Slow Chess Blitz WV2.1 -> 24
Smash 1.0.3 -> 8
Spark 1.0 32-bit -> 26
Spark 1.0 64-bit 4CPU -> 32
Spike 1.2 Turin -> 2
Spike 1.4 Leiden -> 13
Stockfish 2.1.1 32-bit -> 14
TJchess 1.01 -> 14
Tao 5.6 -> 16
Thinker 5.4C Inert 64-bit 4CPU -> 32
Thinker 5.4D Inert 32-bit -> 14
Thor's Hammer 2.28 32-bit -> 14
Toga II 1.4.1SE 4CPU -> 32
Tornado 3.42a 32-bit -> 2
Tornado 4.82 32-bit -> 6
Tornado 4.87 32-bit -> 11
Typhoon 1.00-348 -> 2
Tytan 9.32 -> 14
Ufim 8.02 -> 24
Umko 1.2 32-bit -> 2
Warrior 1.0.3 -> 8
Waxman 2008 -> 2
Waxman 2010 -> 14
WildCat 8 -> 24
iCE 0.1 -> 2
iCE 0.2 -> 14


40/4 games submitted this week
Alaric 707 -> 32
Alfil 11 MT 2CPU -> 446
Bobcat 2.75 64-bit 2CPU -> 32
Brutus 8.05 64-bit 2CPU -> 32
Chess Tiger 2007.1 -> 32
Colossus 2008b -> 32
Critter 1.2 64-bit 4CPU -> 57
Critter 1.2 64-bit 6CPU -> 583
CyberPagno 2.1 -> 32
Deep Junior 12.5 64-bit 4CPU -> 50
Deep Shredder 12 64-bit OA On 4CPU -> 58
Deep Sjeng 3.0 64-bit 4CPU -> 50
Deep Sjeng WC2008 64-bit 4CPU -> 50
Delfi 5.4 -> 32
Deuterium 10.01.27.213 -> 32
Dirty 24Apr2011 64-bit -> 32
E.T. Chess 13.01.08 -> 32
EveAnn 1.66 -> 32
Firefly 2.5.8 64-bit -> 32
Fritz 13 -> 1696
Gaviota 0.84 64-bit -> 32
Hamsters 0.7.1 2CPU -> 31
Hiarcs 13.1 4CPU -> 50
Hiarcs 13.2 4CPU -> 49
Houdini 1.5a 64-bit 4CPU -> 72
Houdini 2.0 64-bit 4CPU -> 50
Houdini 2.0c 64-bit 6CPU -> 546
Komodo 3 64-bit -> 413
Lime 66 -> 32
Mediocre 0.4 -> 160
Movei 00.8.438 (10 10 10) -> 32
Naum 4.2 64-bit 4CPU -> 50
OBender 3.2.x -> 32
Onno 1.2.70 64-bit 4CPU -> 50
Pharaon 3.5.1 2CPU -> 32
Protector 1.4.0 64-bit 4CPU -> 50
Rybka 4.1 64-bit 4CPU -> 455
Rybka 4.1 64-bit 6CPU -> 511
Spark 1.0 64-bit 4CPU -> 50
Spike 1.4 Leiden 4CPU -> 50
Stockfish 2.1.1 64-bit 4CPU -> 456
Stockfish 2.1.1 64-bit 6CPU -> 514
Thinker 5.4c Inert 64-bit 4CPU -> 50
Toga II 1.4 beta5c 4CPU -> 50
WildCat 8 -> 31
Zappa Mexico II 64-bit 4CPU -> 50