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 -> 12
Adam 3.3 -> 24
Alfil 8.1.1 -> 10
Amy 0.87b -> 9
AnMon 5.60 -> 8
Arasan 10.3 -> 8
Arasan 12.1 32-bit -> 6
Arasan 13.2 32-bit -> 10
Arasan 13.3 32-bit -> 10
Ares 1.004 -> 27
Atlas 3.14b 32-bit -> 60
Bagatur 1.2b 32-bit -> 24
Bearded N44.2 -> 24
Bison 9.6 -> 4
Bobcat 2.75 32-bit -> 22
Booot 5.1.0 -> 17
Bright 0.2c -> 6
Bright 0.4a -> 6
Bright 0.5c -> 20
Bruja 1.9.1 32-bit -> 12
Brutus 7.02b -> 8
BugChess2 1.9 32-bit -> 15
Carballo 0.5 32-bit -> 24
Chaturanga 2.4.3 -> 22
Cheng3 1.02b -> 10
Cheng3 1.05 32-bit -> 12
Chess Tiger 2007 -> 6
ChessKiss 1.3a -> 24
Chessmaster 11 -> 10
Chessmaster 11 Conqueror -> 21
Chiron 1.1 32-bit -> 13
Chiron 1.1 64-bit -> 248
Crafty 20.14 32-bit -> 10
Crafty 23.1 32-bit -> 2
Crafty 23.4 32-bit -> 15
Critter 1.2 32-bit -> 8
CuckooChess 1.09 -> 8
CuckooChess 1.12 -> 22
Cyrano 0.6b17 -> 10
Daydreamer 1.75 32-bit -> 15
Deep Junior 11.1a 32-bit 1CPU -> 4
Deep Junior 12.5 32-bit 1CPU -> 13
Deep Sjeng c't 2010 -> 55
Deuterium 11.01.28.159 -> 10
Diablo 0.5.1 -> 12
Dirty 25Aug2011 32-bit -> 10
Dirty 6J-22 -> 6
Djinn 0.925x -> 9
Dorky 4.3 32-bit -> 9
Dragon 4.6 -> 9
ECE 11.01 -> 24
Francesca MAD 0.19 -> 81
Frenzee 3.0 -> 4
Frenzee 3.5.19 32-bit -> 37
Frenzee Feb08 32-bit -> 10
Frenzee Feb08 64-bit -> 32
Fritz 13 -> 429
Gandalf 6 -> 10
GarboChess 3.0 32-bit -> 10
Gaviota 0.84 32-bit -> 16
Ghost 2.0.1 -> 12
Glass 1.7 32-bit -> 21
GreKo 7.2 32-bit -> 10
GreKo 8.2 32-bit -> 21
Gull 1.0a 32-bit -> 8
Gull 1.2 32-bit -> 9
Hannibal 1.1 32-bit -> 17
Hannibal 1.1 64-bit -> 32
Hermann 2.8 32-bit -> 12
Hiarcs 13.2 -> 5
Hiarcs Paderborn 2007 -> 15
Hiarcs X54 Hypermodern 32-bit -> 6
Homer 2.01 -> 12
Horizon 4.4 -> 9
Houdini 1.5a 32-bit -> 8
Houdini 2.0 32-bit -> 8
Hussar 0.4 -> 70
Ifrit m1.5 -> 29
Jazz 501 32-bit -> 24
Jonny 4.00 -> 20
KMTChess 1.2.1 32-bit -> 24
Kiwi 0.6d -> 9
KnockOut 0.7.1 -> 24
Komodo 3 32-bit -> 9
Komodo 3 64-bit SSE -> 50
Ktulu 8 -> 8
Ktulu 9 -> 15
Kurt 0.9.2 32-bit -> 24
Loop 12.32 -> 6
Movei 00.8.403 -> 8
Myrddin 0.85 32-bit -> 24
NanoSzachy 3.9 -> 30
Naraku 1.4 -> 5
Naum 4.2 32-bit -> 9
Naum 4.2 64-bit -> 80
Onno 1.0 32-bit -> 4
Onno 1.2.70 32-bit -> 20
Patzer 3.80 -> 9
Pawny 0.3 32-bit -> 109
Phalanx XXII -> 9
Philou 3.60 -> 30
ProDeo 1.2 Mx4 -> 8
ProDeo 1.7 -> 67
ProDeo 1.72 -> 10
Protector 1.4.0 32-bit -> 5
Pseudo 0.7c -> 10
Pupsi2 0.08 -> 14
Quazar 0.3 32-bit -> 77
Queen 4.03a -> 12
RedQueen 1.0.0 32-bit -> 81
Rodin 4.0 -> 4
RomiChess P3k 32-bit -> 12
Rybka 2.3.2a 32-bit -> 8
Rybka 4.1 32-bit -> 9
Rybka 4.1 64-bit -> 22
Scorpio 1.91 -> 6
Scorpio 2.6 32-bit -> 4
Scorpio 2.7 32-bit -> 15
Shredder 10 32-bit -> 6
Shredder 12 32-bit OA Off -> 9
Shredder 12 32-bit OA On -> 8
Shredder 12 64-bit OA On -> 22
Sorgenkind 0.4 -> 9
Spark 1.0 32-bit -> 5
Spark 1.0 64-bit -> 43
Spike 1.4 Leiden -> 58
Stockfish 2.1.1 32-bit -> 9
Stockfish 2.1.1 64-bit -> 50
TJchess 1.01 -> 9
The Baron 2.23 32-bit -> 10
Thinker 4.7a -> 4
Thinker 5.4D Inert 32-bit -> 13
Toga II 1.2 32-bit -> 6
Toga II 3.1.2SE -> 5
Tornado 2.2 -> 4
Tornado 4.82 32-bit -> 86
Twisted Logic 0.085 -> 6
Twisted Logic 20080404x -> 9
Twisted Logic 20100131x 32-bit -> 15
Umko 1.2 32-bit -> 26
Waxman 2010 -> 10
Zappa Mexico II 32-bit -> 5
iCE 0.2 -> 17


40/4 games submitted this week
Abrok 5.0 -> 98
Adamant 1.7 -> 63
Ajedrez Tactico 2.73b -> 93
Alaric 707 -> 61
Aldebaran 0.7.0 -> 57
Alex 2.14a 64-bit -> 607
Alfil 8.1.1 Optimized -> 126
Amy 0.8.7b DC -> 98
Amyan 1.597 -> 34
Amyan 1.72 -> 474
AnMon 5.60 -> 34
AnMon 5.75 -> 94
Anaconda 2.0.1 -> 66
Arasan 10.0 64-bit -> 34
Arasan 13.1 64-bit -> 398
Arasan 13.2 64-bit -> 395
Ares 1.004 -> 31
Aristarch 4.50 -> 94
Atlas 3.14b 64-bit -> 443
BSC 3.9 -> 97
Beaches 2.32 -> 62
BibiChess 0.5 -> 33
BigLion 2.23x -> 32
Bison 9.11 64-bit -> 30
Bobcat 2.75 64-bit -> 1273
Booot 5.1.0 -> 62
Bright 0.5c -> 62
Bruja 1.9 64-bit JA No-int-book -> 66
Brutus 8.05 64-bit -> 62
BugChess2 1.9 64-bit -> 62
Cerebro 3.03d -> 1216
Chenard 2010.08.23 64-bit -> 97
Cheng3 1.04 64-bit -> 399
Cheng3 1.05 64-bit -> 456
Chess Tiger 2007.1 -> 30
ChessKISS 1.3 -> 1215
ChessMind 0.82 -> 62
Chronos 1.9.9 64-bit -> 61
Clueless V1.4 -> 34
Colossus 2008b -> 93
Counter 1.2 -> 64
Crafty 21.5 PS 64-bit -> 34
Crafty 23.4 64-bit -> 62
CuckooChess 1.11 64-bit -> 400
CuckooChess 1.12 64-bit -> 1532
Cyrano 06b17 64-bit -> 93
DanaSah 4.66 -> 406
Daydreamer 1.75 64-bit -> 62
Delfi 5.4 -> 92
Delphil 2.8 -> 442
Deuterium 10.01.27.213 -> 31
Deuterium 11.01.28.159 -> 443
Dirty 24Apr2011 64-bit -> 29
Dirty 25Aug2011 64-bit -> 443
Dorky 4.3 64-bit -> 410
Dragon 4.6 -> 66
E.T. Chess 13.01.08 -> 62
Eagle 0.7.5 -> 33
Eeyore 1.50 -> 32
Eeyore 1.52 64-bit -> 411
Elf 1.3.0 -> 63
Embracer 1.12 -> 63
Faile 1.4.4 -> 35
Francesca MAD 0.18 -> 405
Francesca MAD 0.19 -> 1195
Frenzee 3.5.19 64-bit -> 30
Fritz 13 -> 239
Fritz 5.32 -> 34
GChess IV 0.2.0 -> 96
GNU Chess 5.07.1705b (TCEC) 64-bit -> 401
GNU Chess 5.07.173b 64-bit -> 493
Gaia 3.5 64-bit -> 66
Gandalf 6 -> 57
GarboChess 2.10 64-bit -> 31
GarboChess 2.20 64-bit -> 94
Gaviota 0.83 64-bit -> 162
Gaviota 0.84 64-bit -> 473
Gerbil 0.2 64-bit -> 31
Glass 1.7 64-bit -> 474
GreKo 8.2 64-bit -> 409
Green Light Chess 3.00 -> 34
Green Light Chess 3.01.2.2 -> 63
Gull 1.0a 64-bit -> 62
Hamsters 0.71 -> 64
Hannibal 1.1 64-bit -> 62
Heracles 0.6.16 -> 35
Hermann 2.6 64-bit -> 431
Hermann 2.8 64-bit -> 464
Houdini 1.5a 64-bit -> 9
Hussar 0.4 -> 443
IACH 0.56z -> 35
Jabba 1.0 64-bit -> 31
JanWillem 1.13 -> 64
Jonny 2.83 32-bit -> 34
Jonny 4.00 -> 62
King of Kings 2.56 -> 98
Kiwi 0.6d 64-bit -> 64
KnightDreamer 3.3 -> 34
KnightX 1.92 -> 32
Ktulu 4.2 -> 97
LambChop 10.99 -> 66
Little Goliath Evolution 3.12 -> 95
LittleThought 1.052 64-bit -> 32
Loop 13.6 (Loop 2007) 64-bit -> 25
Marvin 1.3.0 -> 67
Matacz 1.3 HT74 -> 34
Matacz 1.4 -> 32
Micro-Max 4.8 -> 64
Monarch 1.7 -> 32
Monik 2.2.3 64-bit -> 590
Morphy 3.22 -> 35
Movei 00.8.438 (10 10 10) -> 93
Mustang 4.97 -> 32
N2 0.4 64-bit -> 442
NanoSzachy 3.9 -> 413
Naraku 1.31 -> 30
Naum 2.0 32-bit -> 30
Naum 4.2 64-bit -> 40
Nejmet 3.07 -> 66
Pawny 0.3 64-bit -> 603
Pepito 1.59 32-bit -> 65
Petir 4.39 -> 442
Petir 4.999999 -> 62
Pharaon 3.5.1 -> 61
Philou 3.60 -> 413
Predateur 2.1 64-bit -> 34
ProDeo 1.6 -> 32
ProDeo 1.7 -> 1647
ProDeo 1.71 -> 573
Protector 1.4.0 64-bit -> 91
Pseudo 0.7c -> 64
Pupsi2 0.08 -> 411
Quark 2.35 -> 66
RedQueen 1.0.0 64-bit -> 497
Rival 1.18 -> 35
Roce 0.0390 -> 96
Rodin 4.0 -> 411
RomiChess P3k 64-bit -> 34
Rotor 0.6 -> 471
Ruffian 1.0.5 -> 94
Ruffian 2.1.0 -> 58
Rybka 4.1 64-bit -> 40
SOS 5.1 -> 45
SSEChessII 2.05 DC -> 34
Scorpio 2.7 64-bit -> 62
Sharper 0.17 -> 35
Simontacchi 1.81 -> 30
Simplex 0.9.7 64-bit -> 32
Sloppy 0.2.2 64-bit -> 154
Slow Chess Blitz WV2.1 -> 126
SmarThink 0.17a -> 98
SmarThink 1.20 64-bit -> 30
Smash 1.0.3 -> 34
SnailChess 4.013 -> 34
Snitch 1.6.2 32-bit -> 34
SpiderChess 070603 -> 98
Sungorus 1.4 64-bit -> 32
Surprise 4.3b13 -> 93
TJchess 1.01 -> 32
Tao 5.6 -> 98
The Baron 1.8.1 -> 34
The Baron 2.23 64-bit -> 124
Thinker 4.7a -> 34
Toga II 1.4.1SE -> 92
Tornado 4.40 64-bit -> 62
Trace 1.37a -> 97
Twisted Logic 20080404x -> 34
Twisted Logic 20090922 64-bit -> 93
Typhoon 1.00-358 -> 412
Ufim 8.02 -> 98
Umko 0.9 64-bit -> 86
Warrior 1.0.3 -> 34
WildCat 8 -> 122
Yace 0.99.87 -> 95
Zappa 1.1 64-bit -> 122