*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.

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 -> 1

Adam 3.3 -> 18

Alex 2.14a 32-bit -> 6

Alfil 8.1.1 -> 9

AliChess 4.25 -> 14

AnMon 5.60 -> 2

Anechka 0.08 -> 12

Ant 2006-F -> 12

Arasan 10.3 -> 2

Arasan 12.1 32-bit -> 14

Arasan 13.2 32-bit -> 9

Ares 1.004 -> 6

Atak 6.8 -> 26

Atlas 3.14b 32-bit -> 7

Bagatur 1.2b 32-bit -> 30

Bearded N44.2 -> 18

Beowulf 2.4a 32-bit -> 26

Betsabe II 1.08c -> 26

Bison 9.6 -> 4

Bobcat 2.75 32-bit -> 9

Booot 5.1.0 -> 42

Bright 0.2c -> 14

Bright 0.4a -> 4

Bright 0.5c -> 21

Bruja 1.9.1 32-bit -> 1

Brutus 7.02b -> 18

BugChess2 1.5.1 -> 2

BugChess2 1.9 32-bit -> 6

Butcher 1.61 32-bit -> 14

Carballo 0.5 32-bit -> 18

Cerebro 3.03d -> 1

Chaturanga 2.4.3 -> 18

Cheng3 1.05 32-bit -> 20

Chesley r323 -> 14

Chess Tiger 2007 -> 8

ChessKiss 1.3a -> 18

Chessmaster 11 -> 15

Chessmaster 11 Conqueror -> 10

Chiron 1.1 32-bit -> 49

Counter 1.2 -> 1

Crafty 23.1 32-bit -> 6

Crafty 23.4 32-bit -> 6

Critter 1.2 32-bit -> 9

Critter 1.2 64-bit 4CPU -> 32

Critter 1.2 64-bit SSE -> 18

CuckooChess 1.09 -> 10

CuckooChess 1.10 -> 8

CuckooChess 1.12 -> 10

Cyrano 0.6b17 -> 9

DanaSah 4.66 -> 12

Daydreamer 1.75 32-bit -> 6

Deep Junior 11.1a 32-bit 1CPU -> 6

Deep Junior 12.5 32-bit 1CPU -> 24

Deep Junior 12.5 64-bit 4CPU -> 256

Deep Shredder 12 64-bit OA On 4CPU -> 66

Deep Sjeng c't 2010 -> 9

Delphil 2.8 -> 1

Deuterium 11.01.28.159 -> 9

Diablo 0.5.1 -> 1

Dirty 25Aug2011 32-bit -> 9

Dirty 6J-22 -> 10

Dolphin 1.0 -> 26

Dorky 4.3 32-bit -> 6

ECE 11.01 -> 18

EveAnn 1.66 -> 12

FireFly 2.5.13 32-bit -> 26

Francesca MAD 0.19 -> 106

Frenzee 3.0 -> 12

Frenzee 3.5.19 32-bit -> 6

Frenzee Feb08 32-bit -> 9

Fritz 13 -> 254

Gandalf 6 -> 9

GarboChess 3.0 32-bit -> 13

Gaviota 0.84 32-bit -> 105

Ghost 2.0.1 -> 6

Gibbon 2.52a -> 12

Glass 1.7 32-bit -> 1

GreKo 8.2 32-bit -> 2

Green Light Chess 3.01.2.2 -> 1

Gull 1.0a 32-bit -> 20

Gull 1.2 32-bit -> 21

Gull 1.2 64-bit -> 32

Hannibal 1.1 32-bit -> 28

Hermann 2.8 32-bit -> 2

Hiarcs 13.2 -> 15

Hiarcs 13.2 4CPU -> 32

Hiarcs Paderborn 2007 -> 6

Hiarcs X54 Hypermodern 32-bit -> 4

Homer 2.01 -> 1

Houdini 1.5a 32-bit -> 8

Houdini 1.5a 64-bit 4CPU -> 32

Houdini 2.0 32-bit -> 9

Hussar 0.4 -> 20

Ifrit m1.5 -> 7

Jazz 501 32-bit -> 30

Jonny 4.00 -> 21

KMTChess 1.2.1 32-bit -> 30

KnockOut 0.7.1 -> 30

Komodo 3 32-bit -> 9

Ktulu 8 -> 8

Ktulu 9 -> 6

Kurt 0.9.2 32-bit -> 18

LittleThought 1.052 32-bit -> 1

Loop 12.32 -> 4

Myrddin 0.85 32-bit -> 30

N2 0.1 -> 2

N2 0.4 32-bit -> 12

NanoSzachy 3.9 -> 31

Naraku 1.4 -> 35

Naum 1.91 32-bit -> 8

Naum 4.2 32-bit -> 9

Naum 4.2 64-bit 4CPU -> 32

OliThink 5.3.0 -> 14

Onno 1.0 32-bit -> 6

Onno 1.2.70 32-bit -> 21

Onno 1.2.70 64-bit 4CPU -> 32

Pawny 0.3 32-bit -> 8

Pepito 1.59 32-bit -> 1

Philou 3.60 -> 9

Plisk 0.2.7d 32-bit -> 6

Popochin 3.2 -> 12

ProDeo 1.2 Mx4 -> 2

ProDeo 1.7 -> 44

Protector 1.4.0 32-bit -> 15

Pseudo 0.7c -> 9

Pupsi2 0.08 -> 1

Quark 2.35 -> 1

Quazar 0.3 32-bit -> 46

Queen 4.03a -> 1

RattateChess 1.0 Nosferatu -> 14

RedQueen 1.0.0 32-bit -> 6

Rodin 4.0 -> 13

RomiChess P3k 32-bit -> 1

Rybka 2.3.2a 32-bit -> 8

Rybka 4.1 32-bit -> 9

Rybka 4.1 64-bit -> 27

Rybka 4.1 64-bit 4CPU -> 22

Scorpio 1.91 -> 16

Scorpio 2.6 32-bit -> 4

Scorpio 2.7 32-bit -> 16

Shredder 10 32-bit -> 4

Shredder 12 32-bit OA Off -> 9

Shredder 12 32-bit OA On -> 8

Shredder 12 64-bit OA On -> 50

Simplex 0.9.7 32-bit -> 6

Sjakk 1.1.8 -> 14

Slow Chess Blitz WV2 -> 2

SmarThink 1.00 32-bit -> 6

Spark 1.0 32-bit -> 15

Spark 1.0 64-bit -> 6

Spark 1.0 64-bit 4CPU -> 32

SpiderChess 070603 -> 1

Spike 1.4 Leiden -> 9

Spike 1.4 Leiden 4CPU -> 32

Stockfish 2.0.1 64-bit 4CPU -> 96

Stockfish 2.1.1 32-bit -> 9

Stockfish 2.1.1 64-bit 4CPU -> 22

Sungorus 1.4 32-bit -> 6

TJchess 1.01 -> 16

Tao 5.6 -> 1

The Baron 2.23 32-bit -> 9

Thinker 4.7a -> 12

Thinker 5.4C Inert 64-bit 4CPU -> 32

Thinker 5.4D Inert 32-bit -> 22

Toga II 1.2 32-bit -> 4

Toga II 3.1.2SE -> 15

Tornado 2.2 -> 14

Tornado 4.82 32-bit -> 71

Trace 1.37a -> 1

Twisted Logic 0.085 -> 5

Twisted Logic 20080404x -> 1

Twisted Logic 20100131x 32-bit -> 6

Umko 1.2 32-bit -> 35

Waxman 2010 -> 14

Yace 0.99.87 -> 1

Zappa Mexico II 32-bit -> 15

Zappa Mexico II 64-bit 4CPU -> 22

iCE 0.2 -> 6

**40/4 games submitted this week**

Abrok 5.0 -> 32

Alaric 707 -> 32

Alfil 8.1.1 Optimized -> 32

Amy 0.8.7b DC -> 63

AnMon 5.75 -> 31

Ares 1.004 -> 30

Brutus 8.05 64-bit -> 32

Cerebro 3.03d -> 64

Cheese 1.2 -> 64

Chispa 4.0.3 -> 32

Colossus 2008b -> 32

Comet B50 -> 64

Counter 1.2 -> 32

Crazy Bishop 0052 -> 64

Cyrano 06b17 64-bit -> 32

Daydreamer 1.75 64-bit -> 32

Deep Junior 12.5 64-bit -> 32

Delphil 2.8 -> 1143

Der Bringer 1.9 -> 64

Diablo 0.5.1 -> 32

Djinn 0.925x -> 32

Dragon 4.6 -> 63

E.T. Chess 13.01.08 -> 32

Fritz 13 -> 128

Gaia 3.5 64-bit -> 64

Gandalf 6 -> 32

GarboChess 2.20 64-bit -> 32

Gosu 0.16 -> 64

Green Light Chess 3.01.2.2 -> 64

Hamsters 0.71 -> 32

Hermann 2.8 64-bit -> 1051

Homer 2.01 -> 62

Horizon 4.4 -> 63

Jazz 444 64-bit -> 27

Joker 1.1.14 -> 64

Jonny 4.00 -> 32

King of Kings 2.56 -> 96

Kiwi 0.6d 64-bit -> 96

Ktulu 4.2 -> 29

LambChop 10.99 -> 63

Leila 0.53h -> 62

Little Goliath Evolution 3.12 -> 63

LittleThought 1.052 64-bit -> 64

Movei 00.8.438 (10 10 10) -> 32

Muse 0.899b -> 32

N2 0.4 64-bit -> 32

Naum 2.0 32-bit -> 32

Nejmet 3.07 -> 94

OliThink 5.3.0 64-bit -> 32

Patzer 3.80 -> 50

Pepito 1.59 32-bit -> 95

Phalanx XXII Reborn JA -> 32

Pharaon 3.5.1 -> 32

PostModernist 1016 -> 32

Quark 2.35 -> 96

Queen 4.03 -> 32

RomiChess P3k 64-bit -> 32

Ruffian 2.1.0 -> 32

Sloppy 0.2.2 64-bit -> 32

Slow Chess Blitz WV2.1 -> 32

SmarThink 0.17a -> 32

SmarThink 1.20 64-bit -> 32

Snitch 1.6.2 32-bit -> 63

SpiderChess 070603 -> 96

Tao 5.6 -> 95

Trace 1.37a -> 64

Typhoon 1.00-358 -> 962

Ufim 8.02 -> 64

WildCat 8 -> 32

Xpdnt 091007 -> 63

Yace 0.99.87 -> 60