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Hello Dear Friends,

Nowadays there are a lot of clone/derivative/original work discussions over chess forums
That's why,this time i decided to create a different list,where all engines are played exactly at same position

Similarity Move Test Conditions:
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Processor:QX 9650@3.66GHz
Win XP x64 Prof (service pack 2)
Chess GUIs:Fritz 12 / Arena 3.0
HashTable size:128 MB
Time Control:3 min game
Engine CPUs:All engines are played with 1 core
Before starting each test: engine's hastables are cleaned
Test Opening Position: B12 Caro-Kann,Advance Variation (Side to move:Blacks)
[D] r2qkb1r/pp1nnpp1/2p1p2p/3pPb2/3P4/1N3N2/PPP1BPPP/R1BQ1RK1 b kq - 0 8

Some Notes:
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-The current test is done mainly for recognizing which engines are each other relative
-The Similarity Test can be useful about which engines use same/similar ideas as well
-Similarity Move Test is not done for proving which engines are clone/derivative/original work
-Almost all Top Engines (Houdini;Komodo;Strelka;Stockfish,Critter,Ivanhoe... prefered 'Qc7' move
-Its interesting to note that Rybka 4.1 x64 1c prefered to play 'g5' move (not sure why ?!)
-Fruit 2.1 (open source engine) prefered especially to play 'Ng6'
-Note also 'Ng6' move is the most prefered move by many chess engines
-Zappa 1.0 and Fruit 2.0 are prefered to play 'a5' move (again similarity !)
-Sjeng c't 2010;Spike 1.4;BigLion 1.8f;Junior 6;Sos 5.1 played completely different moves than all

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59 Engine versions prefered 'Ng6' move

Amateur 2.82 - Ng6
Abrok 5.0 - Ng6
Ant 2006 - Ng6
Arasan 13.4 1c - Ng6
BeoWolf 2.4 - Ng6
Betsy 6.51 - Ng6
Bison 10.1 x64 - Ng6
Brutus 8.05 x64 - Ng6
CapaChess - Ng6
Chezzz 1.03 - Ng6
Comet B68 - Ng6
Crafty 23 CB 1c - Ng6
Cyrano 0.6b17 x64 - Ng6
Danasah 4.45 UCI - Ng6
Danasah 4.45 WB - Ng6
DayDreamer 1.75 x64 - Ng6
Deep Ftritz 13 1c - Ng6
Deep Sjeng 1.6 1c - Ng6
Delphil 26a - Ng6
Dirty 25082011 x64 - Ng6
Dragon 4.43 - Ng6
DrunkenMaster 1.2 - Ng6
EXchess 6.10b x64 - Ng6
Franchesca 0.19 - Ng6
Fruit 2.1 - Ng6
GES 1.36 - Ng6
Gull 1.2 x64 - Ng6
GreKo 9.2 - Ng6
Gromit 3.1 CB - Ng6
GnuChess4TM - Ng6
GnuChess 6.0.2 - Ng6
Glaurung 1.0.1 - Ng6
Jonny 2.7 - Ng6
Junior 7 - Ng6
Junior 8 - Ng6
Hiarcs 7.32 - Ng6
Hiarcs 9 - Ng6
Hiarcs 13.2 - Ng6
Ktulu 5.1 - Ng6
Ktulu 9 - Ng6
LambChop 10.99 - Ng6
LittleThought 052 - Ng6
Loop 2007 x64 - Ng6
Movei 0.08.438 1c - Ng6
Naum 4.2 x64 1c - Ng6
Onno 1.2.70 x64 1c - Ng6
Phalanx XXII - Ng6
Pharaon 3.5.1 1c - Ng6
Popochin 3.2 - Ng6
Shredder 9 - Ng6
Spike 0.9a - Ng6
Supra 101 - Ng6
Toga II 1.2.1 - Ng6
Toga II 1.4 beta5c - Ng6
Tornado 4.88 x64 1c - Ng6
Ufirm 8.02 - Ng6
Umko 1.2 x64 1c - Ng6
Zappa Mexico II x64 1c - Ng6
Zarkov 6.50 - Ng6

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57 Engine versions prefered 'Qc7' move

Amy 0.87 - Qc7
Anmon 5.75 WB - Qc7
Aristarch 4.50 - Qc7
AliChess 4.20 - Qc7
BobCat 3.25 x64 - Qc7
Buzz 008 x64 - Qc7
Boot 5.1.0 - Qc7
Cerebro 3.0d - Qc7
Chess Tiger 14 - Qc7
Chess Tiger 15 - Qc7
Chess Tiger 2007.1 - Qc7
Critter 0.8 x64 1c - Qc7
Critter 1.4 x64 1c - Qc7
Chronos 1.99 x64 - Qc7
Deep Junior 13 1c - Qc7
Deuterium 110229107 - Qc7
ETchess 130108 - Qc7
El Cinito 3.25 - Qc7
Elf 1.30 - Qc7
EXchess 4.03 - Qc7
Frenzee 3.5.19 - Qc7
FreeChess 2.17b - Qc7
Fritz in Bahrein - Qc7
Gandalf 5.0 - Qc7
Fire 2.2 xTreme x64 1c - Qc7
Fairy-Max v4.8 - Qc7
Fritz 5.32 - Qc7
Fritz 6 - Qc7
Fritz 7 - Qc7
Fruit 1.0 - Qc7
Fruit 090705 x64 1c - Qc7
Gambit Tiger 2.0- Qc7
GreKo 2.817 - Qc7
Ivanhoe B46fE 1c - Qc7
Hannibal 1.1 x64 - Qc7
Houdini 2.0c - Qc7
Igorrit 0086v9 x64 - Qc7
Insomniac 0.69 - Qc7
Komodo 4 x64 - Qc7
MinkoChess 1.3 x64 1c - Qc7
Nejmet 3.06 - Qc7
Nemo 1.01b x64 - Qc7
Philou 3.70 x64 - Qc7
Pseudo 0.7 - Qc7
Quazar 0.4 x64 - Qc7
Rybka 1.0b x64 1c - Qc7
RobboLito 010 - Qc7
Rufian 2.0.2 - Qc7
Rufian 2.1.0 - Qc7
SOS CB - Qc7
Strelka 5.1 x64 - Qc7
Strelka 5.5 x64 - Qc7
Stockfish 2.2.2 x64 1c - Qc7
TSCP 1.81 - Qc7
Thinker 5.4Di x64 1c - Qc7
Xpdnt 061120 - Qc7
Yace 0.99.87 - Qc7
Vitrivius 1.0C - Qc7

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25 Engine versions prefered 'Nc8' move

Anatoli 035k - Nc8
Amyan 1.59 - Nc8
Amyan 1.72 - Nc8
Arion 1.7 - Nc8
AliBaba 1.18 - Nc8
Bionic 4.01 - Nc8
Cheng3 1.07 - Nc8
Counter 1.2 - Nc8
Colossus 2008b - Nc8
Crafty 19.19 1c - Nc8
Delfi 5.4 1c - Nc8
Faile 1.44 CB - Nc8
Hagrid 0.7.56 - Nc8
Hamsters 0.8.2 1c - Nc8
Icarus 0.18 CB - Nc8
Leila 052f - Nc8
List 512 - Nc8
Mizar 1.0 - Nc8
Nimzo 8 - Nc8
Pepito 1.59 - Nc8
Predator 2.21 x64 - Nc8
Rotor 0.5 - Nc8
Trace 1.37a - Nc8
WildCat 4 WB - Nc8
WildCat 8 UCI - Nc8

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24 Engine versions prefered 'a5' move

Ayito 02994 - a5
Bugchess2 1.9 x64 - a5
Cheese 1.3 - a5
Chiron 1.0a x64 1c - a5
Gaviota 0.84 x64 - a5
Deep Shredder 12 x64 1c - a5
Equinox 1.10 x64 1c - a5
Fritz 8 - a5
Fruit 2.0 - a5
Goliat Light 1.5 - a5
Kiwi 0.6d x64 - a5
King of Kings 2.57 - a5
Matacz14 HT74 - a5
Quark 2.35 - a5
Pawny 0.2 x64 - a5
Patzer 3.11a - a5
Protector 1.4.0 x64 1c - a5
Prodeo 1.0 - a5
ProDeo 1.74 - a5
SlowChess Blitz 2.1 1c - a5
SmarThink 017a - a5
SmarThink 1.20 x64 - a5
Spark 1.0 x64 1c - a5
Zappa 1.0 - a5

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21 Engine versions prefered 'g5' move

Anaconda 2.2.2 - g5
Crafty 23.3 x64 1c - g5
Crafty 18.10 CB - g5
ElTurco 0.93 - g5
Eeyore 1.48 - g5
Jonny 4 x64 - g5
Gandalf 6.0 - g5
Natwarlal 0.14 - g5
Naum 1.8 - g5
Patriot 1.3.0 - g5
RedQueen 1.0.0 x64 - g5
Rybka v2.1c - g5
Rybka 4.1 x64 1c - g5
Sjeng WC2008 x64 1c - g5
Scorpio 2.7 x64 1c - g5
Testina 2.2 - g5
Texel 101 x64 - g5
The Baron 2.2.2 - g5
The Baron 2.2.3 - g5
The King 3.33 - g5
The King 3.50 x64 1c - g5
Thinker 4.7a - g5

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3 Engine versions prefered 'Rc8' move

GarboChess 3 x64 - Rc8
Litle Goliath Revival 3.11 - Rc8
RomiChess P3k x64 - Rc8

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3 Engine versions prefered 'Bh7' move

Tao 5.7 - Bh7
The Crazy Bishop CB - Bh7
The Crazy Bishop 052 - Bh7

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2 Engine versions prefered 'Bg4' move

Gaia 3.5 x64 - Bg4
LordKing 2006 Serafinus - Bg4

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1 Engine versions prefered 'b6' move

Sjeng c't 2010 - b6

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1 Engine version prefered 'Bg6' move

Spike 1.4 1c - Bg6

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1 Engine version prefered 'Be4' move

Sos 5.1 For Arena - Be4
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1 Engine version prefered 'f6' move

BigLion 1.8f - f6
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1 Engine version prefered 'Rg8' move

Junior 6 - Rg8

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Best Regards,
Sedat Canbaz