The Week in Chess

Friday, February 28, 2014

Stockfish 14022619 x64 - Test Tournament


While waiting for major updates from major strong engines, I utilized the idle time to test the latest Stockfish released last February 26. This is just to probe whether there are some major regressions and see if the pattern of the result correspond with their ranking.

The test was done with Arena 3.5 GUI using 2 cores and 128 MB of hash.  The computer used was an AMD quad core with 4GB of RAM which is the main computer utilized in the rating list production. Instead of a self-test, I choose the two major rivals Houdini and Komodo to be the sparring partners in the tournament. Time control was 1 minute base + 1 seconds increment and each will face each other 100 times in a round robin.

Stockfish 14022619 Test Tournament - 2 cores 128MB hash
RankEngineScoreStHoKoS-B
1Stockfish_14022619_x64119.5/200· ·· ·· ··34-16-5038-17-45 10770.25 
2Houdini 4 Pro x64 100.0/20016-34-50· ·· ·· ··35-17-48 9649.00 
3Komodo TCEC x64 80.5/20017-38-4517-35-48· ·· ·· ·· 8820.25 


300 games played / Tournament finished

Tournament start: 2014.02.28, 00:58:57
Latest update: 2014.02.28, 13:37:10
Level: Blitz 1/1
Hardware: AMD Phenom(tm) II X4 945 Processor with 1.8 GB Memory
Operating system: Windows 7 Ultimate Professional Service Pack 1 (Build 7601) 64 bit
Table created with: Arena 3.5
The result showed that Stockfish 14022619 won the test tournament with 119.5/200, 19.5 points margin higher than the second placer Houdini 4 Pro. Komodo was in its usual rank at number 3. Comparing the performance of the latest Stockfish against the one that was in the rating list a week earlier, it showed no improvement and no perceptible regression. The minor patches in a weeks time has no particular effect in the strength of Stockfish 14022619.

There seemed to be slow and minor improvements in the past weeks. It may have been caused by the disagreement over the manner of implementing the patches. When individual contributors have differing styles and temperaments, conflicts may occur.  It is particularly hard for the leader to appease everyone and eventually forking may occur. That would be the likely outcome if one contributor wants that his ideas will always be implemented irregardless of the policies. It's alright, let it be. It will make somebody happy.

Download the test  tournament games here.


Saturday, February 22, 2014

Stockfish 140220 x64 - Gauntlet Matches, 100 Rounds

Stockfish 140220 x64 is a UCI chess engine by +Marco Costalba+Joona Kiiski and +Tord Romstad. It is a development version released last February 20, 2014 and compiled from source.

Stockfish 140220 scored 73.39% with 1026 wins, 137 losses and 737 draws against the strongest 19 chess engines in the 100 rounds gauntlet matches with a time control of 1 minute + 1 second. It obtained an ELO rating of 3234 and maintained the number 1 rank. There was only a 3 points ELO increase from the previous release test after the many small patches in a month's duration.

Performance stats fo Stockfish:
Rank Engine ELO Raw Games Score% Points Win Loss Draw Chg TF% Ply
1 Stockfish 140220 x64 3234 148 1900 73.39 1394.5 1026 137 737 3234 0.05 115
2 Houdini 4 Pro x64 3182 107 100 42.50 42.5 12 27 61 0 0.00 0
3 Komodo TCEC x64 3163 88 100 40.00 40.0 16 36 48 1 0.00 0
4 DON 140210 x64 3144 77 100 37.50 37.5 9 34 57 -1 0.00 0
5 Critter 1.6a x64 3089 37 100 32.50 32.5 12 47 41 0 0.00 0
6 Mars 1 x64 3060 35 100 31.50 31.5 9 46 45 2 0.00 0
7 Gull R600 x64 3100 23 100 30.50 30.5 10 49 41 0 0.00 0
8 Tactico Power 2011 x64 3025 -5 100 26.00 26.0 5 53 42 0 0.00 0
9 LEOpard 0.7c x64 3023 -7 100 25.50 25.5 5 54 41 0 2.00 144
10 Bouquet 1.8 x64 3062 -14 100 25.00 25.0 6 56 38 0 0.00 0
11 Firenzina 2.4 xTreme x64 3053 -16 100 25.00 25.0 7 57 36 0 0.00 0
12 Rybka 4.1 x64 3025 -18 100 24.50 24.5 5 56 39 0 0.00 0
13 Fire 3.0 x64 3062 -22 100 25.50 25.5 11 60 29 -2 0.00 0
14 PanChess 00.537 x64 3047 -23 100 24.50 24.5 8 59 33 -1 0.00 0
15 Strelka 5.7 x64 3076 -28 100 23.50 23.5 6 59 35 0 0.00 0
16 Ivanhoe 46h x64 3029 -51 100 20.50 20.5 3 62 35 -1 3.00 129
17 Equinox 2.02 x64 3051 -63 100 20.50 20.5 7 66 27 -3 0.00 0
18 Saros 4.1.6 x64 3033 -67 100 19.00 19.0 3 65 32 0 2.00 108
19 Igorrit 0.086v9 x64 3041 -92 100 16.50 16.5 2 69 29 -1 0.00 0
20 RobboLito 0.21Q x64 3039 -107 100 15.00 15.0 1 71 28 -1 0.00 0
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Download the computer chess engines tournament games here.

Owl Computer Chess Engines Rating List #94

The 94th Owl Computer Chess Engines Rating List released, 02/22/2014.

View the full rating list here.

Monday, February 17, 2014

Equinox 2.02 x64 - Gauntlet Matches, 100 Rounds

Equinox 2.02 x64 is a private UCI chess engine by Giancarlo Delli Colli and Stefano Rocchi.

Equinox scored 46.33% with 416 wins, 563 losses and 1021 draws against the 20 strongest engines in the 100 rounds gauntlet matches. It attained 3054 ELO rating points and number 15 rank in the Top 100 Chess Engines list.

Here is the performance of Equinox:
Rank Engine ELO Raw Games Score% Points Win Loss Draw Chg TF% Ply
1 Houdini 4 Pro x64 3182 120 100 72.50 72.5 52 7 41 1 0.00 0
2 Stockfish 140119 x64 3231 117 100 73.00 73.0 49 3 48 -1 0.00 0
3 Komodo TCEC x64 3162 110 100 71.00 71.0 50 8 42 1 0.00 0
4 DON 140210 x64 3145 45 100 61.00 61.0 38 16 46 -1 0.00 0
5 Critter 1.6a x64 3089 32 100 59.00 59.0 35 17 48 1 0.00 0
6 Samsung x64 3100 12 100 55.50 55.5 36 25 39 0 0.00 0
7 Gull R600 x64 3100 3 100 54.50 54.5 23 14 63 -1 0.00 0
8 Firenzina 2.4 xTreme x64 3053 -4 100 53.00 53.0 25 19 56 0 0.00 0
9 Igorrit 0.086v9 x64 3042 -16 100 51.00 51.0 29 27 44 0 0.00 0
10 Rybka 4.1 x64 3025 -18 100 51.00 51.0 28 26 46 1 0.00 0
11 Mars 1 x64 3058 -20 100 50.50 50.5 22 21 57 0 0.00 0
12 Strelka 5.7 x64 3076 -22 100 50.00 50.0 22 22 56 -1 0.00 0
13 Equinox 2.02 x64 3054 -22 2000 46.33 926.5 416 563 1021 3054 0.00 0
14 LEOpard 0.7c x64 3023 -26 100 49.50 49.5 23 24 53 1 0.00 0
15 Fire 3.0 x64 3064 -35 100 47.50 47.5 21 26 53 -1 0.00 0
16 Tactico Power 2011 x64 3025 -39 100 47.00 47.0 18 24 58 0 0.00 0
17 Saros 4.1.6 x64 3033 -40 100 47.00 47.0 23 29 48 0 0.00 0
18 Bouquet 1.8 x64 3062 -48 100 45.50 45.5 15 24 61 -2 0.00 0
19 PanChess 00.537 x64 3048 -48 100 45.50 45.5 19 28 53 -1 1.00 112
20 RobboLito 0.21Q x64 3040 -50 100 45.00 45.0 17 27 56 -1 0.00 0
21 Ivanhoe 46h x64 3030 -52 100 44.50 44.5 18 29 53 0 0.00 0

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Download the computer chess engines tournament games here.

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