**The latest CCRL Rating Lists and Statistics are available for viewing from the following links**:

http://computerchess.org.uk/ccrl/4040/

**(40/40)**

http://www.computerchess.org.uk/ccrl/404/

**(40/4)**

http://www.computerchess.org.uk/ccrl/404FRC/

**(FRC 40/4)**

Please note that the three lists are updated separately to each other. The 40/40 and 40/4 lists are updated once every two weeks and alternately to each other. The FRC list is updated when a new engine or engine version is being/has been tested.

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 or ECO code. 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.

**Games submitted for this update**

Stockfish 3 64-bit -> 281

Protector 1.5.0 32-bit -> 186

Capivara LK 0.09a01a 64-bit -> 179

Houdini 3 Tactical 64-bit -> 176

Dirty 20Apr2013 64-bit -> 174

BlackMamba 1.4 64-bit -> 157

DeepSaros 3.3b 64-bit -> 114

Strelka 5.5 64-bit -> 113

Critter 1.6a 64-bit -> 96

ProChess 1.02AD -> 89

Soldat III 0.172 -> 81

Tigran 2.3 64-bit -> 79

Rybka 4.1 64-bit -> 78

ChessKiss 1.7 64-bit -> 78

Shallow 1.0 64-bit -> 70

Houdini 3 64-bit -> 62

Mediocre 0.5 -> 57

Vajolet 1.62.1 -> 55

IvanHoe 9.46h 64-bit -> 54

Stockfish 3 64-bit 4CPU -> 54

Rodent 1.0 64-bit -> 52

Sting SF 3 64-bit -> 51

EXchess 7.03b 64-bit -> 50

Arasan 15.5 64-bit -> 50

Booot 5.1.0 -> 50

ProDeo 1.85 -> 50

Butcher 1.64 64-bit -> 49

Rhetoric Lite -> 47

Dabbaba 6.52 -> 42

BigLion 2.23w -> 42

Cupcake 1.0 -> 42

BikJump 1.8 64-bit -> 42

Bouquet 1.6 64-bit -> 42

Gibbon 2.01b -> 42

BibiChess 0.5 -> 42

FireFly 2.5.13 64-bit -> 40

RobboLito 0.21Q 64-bit -> 40

Nemo 1.0.1 64-bit -> 40

Stockfish 2.3.1 64-bit -> 40

BigLion 2.23x -> 39

Cupcake 1.1a -> 39

FireFly 2.6.0 64-bit -> 39

Dabbaba 7.49 -> 39

Gibbon 2.57a 64-bit -> 39

MadChess 1.2 -> 39

Jabba 13032012 -> 39

Bison 9.11 64-bit -> 37

Scorpio 2.7.5 64-bit -> 37

Texel 1.01 64-bit -> 36

Arasan 15.5 64-bit 4CPU -> 33

EveAnn 1.67 -> 32

EXchess 5.04b 64-bit -> 32

RedQueen 1.1.3 64-bit -> 28

Sting SF 2 64-bit -> 26

TJchess 1.1 64-bit -> 25

Komodo 5 64-bit -> 25

EveAnn 1.71a -> 25

Gaviota 0.86 64-bit -> 25

Vitruvius 1.11C 64-bit -> 24

GNU Chess 5.50 64-bit -> 24

MinkoChess 1.3 64-bit -> 24

DiscoCheck 4.1 64-bit -> 24

Toga II 3.0 -> 24

SmarThink 1.20 64-bit -> 24

Octochess r4984 64-bit -> 24

Tornado 4.88 64-bit -> 24

Naum 4.2 64-bit -> 21

Crafty 23.5 64-bit 4CPU -> 19

Gull R375 64-bit -> 19

Toga II 3.0 4CPU -> 19

Zappa Mexico II 64-bit 4CPU -> 18

Spark 1.0 64-bit 4CPU -> 18

Onno 1.2.70 64-bit 4CPU -> 18

Deep Junior 13.3 64-bit 1CPU -> 18

Ifrit m1.8 64-bit -> 18

Chiron 1.5 64-bit -> 18

Betsabe II 1.30 64-bit -> 18

RomiChess P3L 64-bit -> 17

NirvanaChess 1.0 -> 17

OliThink 5.3.2 64-bit -> 17

ECE 12.01 -> 17

Quazar 0.4 64-bit -> 17

Waxman 2011 -> 17

Bagatur 1.3a 64-bit -> 17

Myrddin 0.86 64-bit -> 17

Hiarcs 14 -> 16

Hannibal 1.3 64-bit -> 15

Stockfish 2.3.1 32-bit -> 14

Critter 0.60 64-bit -> 14

Critter 1.6a 32-bit -> 14

Glaurung 2.1 64-bit -> 14

Philou 3.7.1 64-bit -> 14

Houdini 1.5a 32-bit -> 14

LoopList 6.00 -> 14

Chess Tiger 2007.1 -> 13

Bobcat 3.25 64-bit -> 13

Ktulu 9 -> 13

Daydreamer 1.75 64-bit -> 13

Delfi 5.4 -> 13

Chessmaster 11 Conqueror -> 13

Gaviota 0.86 64-bit 4CPU -> 12

IvanHoe 9.46h 32-bit -> 12

Deep Junior 13.3 32-bit 1CPU -> 12

MinkoChess 1.3 64-bit 4CPU -> 12

Crafty 23.5 64-bit -> 12

Tornado 4.88 64-bit 4CPU -> 12

Gull II b2 64-bit -> 12

Spike 1.4 Leiden -> 12

Quazar 0.4 32-bit -> 12

Komodo 5 32-bit -> 12

Sting SF 2 32-bit -> 12

Scorpio 2.7.5 64-bit 4CPU -> 12

RobboLito 0.21Q 32-bit -> 12

Hannibal 1.3 32-bit -> 12

Bright 0.5c 4CPU -> 12

Shredder 12 32-bit OA On -> 12

Nebula 2.0 64-bit 4CPU -> 12

Chronos 1.9.9 64-bit -> 12

DeepSaros 2.3j 32-bit -> 12

Loop 13.6 (Loop 2007) 64-bit 4CPU -> 12

Rybka 2.3.2a 32-bit -> 12

Shredder 12 32-bit OA Off -> 12

Alfil 13.1 64-bit 4CPU -> 11

Critter 1.6a 64-bit 4CPU -> 11

EXchess 7.03b 64-bit 4CPU -> 11

Jonny 4.00 4CPU -> 11

Protector 1.5.0 64-bit -> 11

Naum 4.2 64-bit 4CPU -> 11

Bouquet 1.6 64-bit 4CPU -> 11

Hiarcs 14 4CPU -> 11

Thinker 5.4D Inert 64-bit 4CPU -> 11

Chiron 1.1a 64-bit -> 11

Octochess r4984 64-bit 4CPU -> 11

Deep Sjeng WC2008 64-bit 4CPU -> 11

BugChess2 1.9 64-bit 4CPU -> 11

Rybka 4.1 64-bit 4CPU -> 11

RobboLito 0.21Q 64-bit 4CPU -> 11

Vitruvius 1.11C 64-bit 4CPU -> 11

IvanHoe 9.46h 64-bit 4CPU -> 10

Houdini 3 64-bit 4CPU -> 10

Djinn 0.987 64-bit -> 10

Sting SF 3 64-bit 4CPU -> 9

Plisk 0.2.6 64-bit -> 8

Quazar 0.2 64-bit -> 8

Ifrit m1.6 32-bit -> 8

RomiChess P3L 32-bit -> 8

Popochin 2.9 -> 8

Stockfish 2.2.2 64-bit -> 8

Spike 1.4 Leiden 4CPU -> 7

Hannibal 1.3 64-bit 4CPU -> 7

Gull R375 64-bit 4CPU -> 7

Jazz 721 64-bit -> 6

Rotor 0.1a -> 6

Deep Shredder 12 64-bit OA On 4CPU -> 6

Zeus 1.28 -> 6

GreKo 5.9 -> 6

Protector 1.5.0 64-bit 4CPU -> 6

Sjakk 2.0 64-bit -> 6

Chiron 1.5 64-bit 4CPU -> 6

Deep Junior 13.3 64-bit 4CPU -> 6

Thinker 5.4D Inert 64-bit -> 5

Komodo CCT 64-bit -> 4

Shredder 12 64-bit OA Off -> 4

Chess Tiger 2007 -> 2

Glass 2.0 64-bit -> 2

Cheese 1.4 64-bit -> 2

GreKo 9.7 64-bit -> 2

EXchess 6.71b 64-bit -> 2