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 for this update
Abrok 5.0 -> 8
Alaric 707 -> 24
Alex 2.14a 32-bit -> 98
Alfil 7.6 -> 6
Amyan 1.72 -> 44
AnMon 5.75 -> 13
Arasan 10.2 -> 2
Arasan 12.1 32-bit -> 6
Arasan 13.1 32-bit -> 1
Arasan 13.2 32-bit -> 33
Arasan 13.2 64-bit -> 216
Arasan 9.2 -> 4
Ares 1.003a -> 4
Bearded 06_29 -> 24
Betsabe II 1.08c -> 12
Booot 5.1.0 -> 4
Bright 0.2c -> 6
Bruja 1.9.1 64-bit -> 24
Brutus 5.4 -> 4
Brutus 7.02b -> 6
Brutus 8.05 32-bit -> 20
Butcher 1.61 32-bit -> 10
CM10th Paralyse -> 14
CM10th Xperience -> 14
CM9000 Assassin -> 23
CM9000 Enforcer -> 10
Cerebro 3.03d -> 9
Cheng3 1.05 32-bit -> 85
Chess Tiger 2007 -> 6
Chessmaster 11 Conqueror -> 10
Chiron 1.0 32-bit -> 198
Colossus 2008b -> 24
Counter 1.0 -> 6
Counter 1.2 -> 27
Crafty 22.8 32-bit -> 7
Critter 0.52b 32-bit -> 4
Critter 1.2 32-bit -> 28
Critter 1.2 64-bit -> 32
CuckooChess 1.11 -> 33
Cyclone 1.0 -> 4
Cyrano 0.2f -> 4
DanaSah 2.85 -> 6
DanaSah 4.66 -> 31
Daydreamer 1.5 -> 4
Daydreamer 1.75 32-bit -> 20
Deep Junior 11.1a 32-bit 1CPU -> 4
Deep Junior 12.5 32-bit 1CPU -> 28
Deep Sjeng c't 2010 -> 28
Delphil 2.8 -> 27
Dirty 0.99n -> 4
DoubleCheck 1.3.1 64-bit -> 24
ECE 11.01 -> 24
Eeyore 1.52 -> 18
FireFly 2.5.12 64-bit -> 24
FireFly 2.5.4 -> 4
GarboChess 3.0 32-bit -> 42
Gaviota 0.75.7 32-bit -> 4
Gaviota 0.83 64-bit -> 24
Gaviota 0.84 32-bit -> 33
Glass 1.7 32-bit -> 33
GreKo 7.0 -> 6
GreKo 8.2 32-bit -> 27
Green Light Chess 3.01.2.2 -> 9
Gull 1.2 32-bit -> 4
Hannibal 1.1 32-bit -> 14
Hermann 1.9 -> 6
Hermann 2.8 32-bit -> 29
Hiarcs 13.2 -> 28
Hiarcs X54 Hypermodern 32-bit -> 4
Houdini 1.5a 32-bit -> 12
Houdini 1.5a 64-bit SSE -> 49
Houdini 2.0 32-bit -> 28
Hussar 0.4 -> 27
Ifrit m1.4 -> 10
Jonny 4.00 -> 4
Kiwi 0.6d -> 6
Komodo 3 32-bit -> 28
Komodo 3 64-bit -> 23
Komodo 3 64-bit SSE -> 6
Kurt 0.9.2.2 64-bit -> 24
LittleThought 1.00 32-bit -> 4
LittleThought 1.052 32-bit -> 27
LittleThought 1.052 64-bit -> 24
Loop 12.32 -> 4
LoopList 6.00 -> 1
Matacz 1.1 -> 4
Myrddin 0.85 64-bit -> 24
N2 0.4 32-bit -> 33
NagaSkaki 5.12 -> 24
NanoSzachy 3.9 -> 210
Naraku 1.4 -> 73
Natwarlal 0.12 -> 4
Naum 4.2 32-bit -> 28
Onno 1.0 32-bit -> 4
Parrot 07.07.22 -> 24
Pawny 0.1.6 -> 4
Pawny 0.3 32-bit -> 18
Pepito 1.59 32-bit -> 9
Petir 4.999999 -> 13
Pharaon 3.5.1 -> 24
Philou 2.7.0 -> 6
Philou 3.60 -> 57
Pro Deo 1.6 -> 13
Prophet 2.0 -> 24
Protector 1.4.0 32-bit -> 13
Pupsi2 0.08 -> 27
Quark 2.35 -> 33
Quazar 0.2 64-bit -> 216
Quazar 0.21 32-bit -> 12
RedQueen 1.0.0 32-bit -> 2
RedQueen 1.0.0 64-bit -> 24
Rodin 4.0 -> 31
Rotor 0.6 -> 37
Rybka 1.0 32-bit -> 4
Rybka 2.3.2a 32-bit -> 10
Rybka 4.1 32-bit -> 28
Scorpio 2.0 -> 6
Scorpio 2.1 32-bit -> 1
Scorpio 2.6 32-bit -> 5
Shredder 10 32-bit -> 4
Shredder 12 32-bit OA Off -> 10
Shredder 12 32-bit OA On -> 28
Sloppy 0.2.3 64-bit -> 24
Spark 1.0 32-bit -> 13
SpiderChess 070603 -> 33
Spike 1.4 Leiden -> 28
Stockfish 2.1.1 32-bit -> 28
Tao 5.6 -> 9
The Baron 2.23 32-bit -> 13
Thinker 5.4D Inert 32-bit -> 10
Toga II 1.2 32-bit -> 4
Tornado 2.2 -> 4
Trace 1.36 -> 24
Trace 1.37a -> 9
Twisted Logic 0.085 -> 6
Twisted Logic 20070915 -> 6
Typhoon 1.00-358 -> 24
Umko 1.0 32-bit -> 6
Umko 1.2 32-bit -> 4
Xpdnt 091007 -> 42
Yace 0.99.87 -> 33


40/4 games submitted for this update
Abrok 5.0 -> 95
Aice 0.99.2 -> 34
Alaric 707 -> 64
Alarm 0.93.1 -> 32
Alex 2.07a -> 31
Alfil 8.1.1 Optimized -> 96
Amateur 2.82 -> 34
Amy 0.8.7b DC -> 127
Amyan 1.72 -> 63
AnMon 5.75 -> 96
Ant 2006-F -> 32
Arasan 13.2 64-bit -> 734
Ares 1.004 -> 101
Arion 1.7 -> 34
Aristarch 4.50 -> 96
Asterisk 0.6 -> 34
Atak 6.8 -> 52
Atlas 3.14b 64-bit -> 32
Averno 0.81 -> 34
Ayito 0.2.994 -> 34
Beowulf 2.4a 32-bit -> 32
Betsy 6.51 Nobook -> 64
Bobcat 2.75 64-bit -> 32
Bruja 1.9 64-bit JA No-int-book -> 64
Butcher 1.61 64-bit 2CPU -> 408
Cerebro 3.03d -> 94
Chezzz 1.0.3 -> 34
Chispa 4.0.3 -> 57
Colossus 2008b -> 95
Comet B50 -> 30
Comet B68 -> 34
Counter 1.2 -> 32
Crazy Bishop 0052 -> 66
CuckooChess 1.11 64-bit -> 1106
CyberPagno 2.1 -> 31
Cyrano 06b17 64-bit -> 64
Daydreamer 1.75 64-bit -> 32
Delfi 5.4 -> 32
Der Bringer 1.9 -> 66
Deuterium 11.01.28.159 -> 32
Diablo 0.5.1 -> 34
Dirty 24Apr2011 64-bit -> 32
Djinn 0.925x -> 66
Dorky 4.3 64-bit -> 32
Dragon 4.6 -> 30
E.T. Chess 13.01.08 -> 32
EXchess 4.03 -> 31
EXchess 5.01b 64-bit -> 34
Eeyore 1.48 -> 34
Esc 1.16 -> 32
Firefly 2.5.8 64-bit -> 32
Fortress 1.62 -> 32
Francesca MAD 0.18 -> 883
GNU Chess 5.07.9b 64-bit JA -> 34
Gaia 3.5 64-bit -> 32
GarboChess 2.20 64-bit -> 32
Gaviota 0.84 64-bit -> 96
Genesis 2.0 -> 32
Gosu 0.16 -> 66
Green Light Chess 3.01.2.2 -> 96
Hamsters 0.71 -> 96
Hermann 2.6 64-bit -> 32
Homer 2.01 -> 34
Horizon 4.4 -> 34
InmiChess3.06N -> 32
Jazz 444 64-bit -> 818
King of Kings 2.56 -> 63
Kiwi 0.6d 64-bit -> 64
KnightX 1.92 -> 34
Ktulu 4.2 -> 60
Ktulu 9.0 -> 32
Leila 0.53h -> 32
Lime 66 -> 32
Little Goliath Evolution 3.12 -> 92
Matilde 2008 64-bit -> 34
Movei 00.8.438 (10 10 10) -> 32
Muse 0.899b -> 66
Myrddin 0.85 64-bit -> 31
N2 0.4 64-bit -> 32
Natwarlal 0.14 -> 65
Nesik 0.7.0 alpha -> 32
OBender 3.2.x -> 31
Patzer 3.80 -> 34
Pawny 0.3 64-bit -> 32
Pepito 1.59 32-bit -> 32
Phalanx XXII Reborn JA -> 34
Pharaon 3.5.1 -> 32
Plisk 0.2.7d 64-bit -> 28
Popochin 3.2 -> 32
PostModernist 1016 -> 34
Pro Deo 1.6 -> 32
Pseudo 0.7c -> 64
Queen 4.03 -> 34
Resp 0.19 64-bit JA Nobook -> 96
Rodin 4.0 -> 32
RomiChess P3k 64-bit -> 32
Ruffian 1.0.5 -> 64
SOS 5.1 -> 60
Sage 3.53 -> 1214
Scidlet 3.61 x64 JA -> 34
Simplex 0.9.7 64-bit -> 32
Sjakk 1.1.8 -> 32
Sjeng 12.13 -> 34
Sloppy 0.2.2 64-bit -> 62
Slow Chess Blitz WV2.1 -> 63
SmarThink 0.17a -> 64
SpiderChess 070603 -> 32
Sungorus 1.4 64-bit -> 31
TJchess 1.01 -> 31
Tao 5.6 -> 64
The Baron 2.23 64-bit -> 64
Thor's Hammer 2.28 32-bit -> 34
Trace 1.37a -> 64
Tytan 9.32 64-bit -> 34
Ufim 8.02 -> 63
Uralochka 1.1b -> 52
WJChess 1.64 -> 30
Waxman 2010 -> 32
WildCat 8 -> 62
Yace 0.99.87 -> 62
Zappa 1.1 64-bit -> 62
Zeus 1.29 -> 66