The Week in Chess

Sunday, May 19, 2019

Rodent III 0.281 vs. Top Chess Engines II


Rank Chess Engine ELO Games Score%  Win%  Draw% Loss%
1 Hakkapeliitta 210416 x64  3029.63 100 58.50 45.00 27.00 28.00
2 Bobcat 8.0 x64  2994.04 100 53.50 36.00 35.00 29.00
3 Demolito 2018-10-29 x64  2987.00 100 52.50 37.00 31.00 32.00
4 Amoeba 3.0 x64  2972.97 100 50.50 30.00 41.00 29.00
5 Rodent III 0.281 x64  2969.46 1300 55.85 39.23 33.20 27.57
6 HIARCS 14  2962.45 100 49.00 27.00 44.00 29.00
7 Crafty 25.2 x64  2941.36 100 46.00 27.00 38.00 35.00
8 Spike 1.4  2941.36 100 46.00 25.00 42.00 33.00
9 Dirty Cucumber x64  2937.83 100 45.50 28.00 35.00 37.00
10 Atlas 3.91 x64  2923.64 100 43.50 26.00 35.00 39.00
11 Cheng 4.39 x64  2887.38 100 38.50 19.00 39.00 42.00
12 Sjeng 2010  2883.67 100 38.00 27.00 22.00 51.00
13 Toga II 4.0 x64  2849.30 100 33.50 23.00 21.00 56.00
14 Spark 1.0 x64  2715.36 100 19.00 8.00 22.00 70.00

Download gauntlet tournament PGN games here.

Tuesday, May 7, 2019

Rubi 1.4 vs. Top Chess Engines


Rank Chess Engine  ELO Games Score%  Win%  Draw% Loss%
1 Stockfish 10 x64  3577.64 100 95.50 91.00 9.00 0.00
2 Houdini 6.02 x64  3482.53 100 92.50 86.00 13.00 1.00
3 Komodo 11.2.2 x64  3427.31 100 90.00 82.00 16.00 2.00
4 Fire 7.1 x64  3417.79 100 89.50 83.00 13.00 4.00
5 Xiphos 0.5 x64  3375.39 100 87.00 75.00 24.00 1.00
6 Rofchade 2.1 x64  3353.21 100 85.50 78.00 15.00 7.00
7 Shredder 13 x64  3302.12 100 81.50 67.00 29.00 4.00
8 Laser 1.7 x64  3269.21 100 78.50 61.00 35.00 4.00
9 Andscacs 0.95 x64  3269.21 100 78.50 66.00 25.00 9.00
10 Schooner 2.0.34 x64  3249.10 100 76.50 61.00 31.00 8.00
11 Critter 1.6a x64  3203.45 100 71.50 54.00 35.00 11.00
12 Ethereal 11.25 x64  3199.17 100 71.00 61.00 20.00 19.00
13 Equinox 3.30 x64  3190.75 100 70.00 49.00 42.00 9.00
14 Gull 3 x64  3190.75 100 70.00 55.00 30.00 15.00
15 Hannibal 1.7 x64  3182.48 100 69.00 48.00 42.00 10.00
16 Texel 1.07 x64  3158.50 100 66.00 50.00 32.00 18.00
17 Booot 6.3.1 x64  3146.91 100 64.50 45.00 39.00 16.00
18 Fizbo 2.0 x64  3139.30 100 63.50 50.00 27.00 23.00
19 Protector 1.9.0 x64  3135.53 100 63.00 45.00 36.00 19.00
20 Pedone 1.9 x64  3131.78 100 62.50 43.00 39.00 18.00
21 Nirvana 2.4 x64  3131.78 100 62.50 42.00 41.00 17.00
22 Wasp 3.60 x64  3095.24 100 57.50 39.00 37.00 24.00
23 Fritz 15 x64  3091.65 100 57.00 46.00 22.00 32.00
24 Senpai 2.0 x64  3088.08 100 56.50 37.00 39.00 24.00
25 Smarthink 1.98 x64  3080.97 100 55.50 43.00 25.00 32.00
26 ICE 3.0.658 x64  3073.89 100 54.50 40.00 29.00 31.00
27 Arasan 21.3 x64  3070.36 100 54.00 36.00 36.00 28.00
28 SCTR 1.1f x64  3066.84 100 53.50 39.00 29.00 32.00
29 Nemorino 5.00 x64  3056.29 100 52.00 31.00 42.00 27.00
30 Rubi 1.4 x64  3042.26 4500 42.23 27.44 29.60 42.96
31 Vajolet 2.2.7 x64  3038.76 100 49.50 32.00 35.00 33.00
32 Hakkapeliitta 210416 x64  3031.74 100 48.50 37.00 23.00 40.00
33 Amoeba 3.0 x64  3010.63 100 45.50 28.00 35.00 37.00
34 Naum 4.6 x64  3000.00 100 44.00 23.00 42.00 35.00
35 Demolito 2018-10-29 x64  2971.21 100 40.00 19.00 42.00 39.00
36 HIARCS 14  2960.18 100 38.50 25.00 27.00 48.00
37 Bobcat 8.0 x64  2941.43 100 36.00 19.00 34.00 47.00
38 Rodent III 0.273 x64  2941.43 100 36.00 19.00 34.00 47.00
39 Dirty Cucumber x64  2933.78 100 35.00 22.00 26.00 52.00
40 Deuterium 2019.1.36.50 x64  2922.11 100 33.50 22.00 23.00 55.00
41 Atlas 3.91 x64  2914.18 100 32.50 22.00 21.00 57.00
42 Cheng 4.39 x64  2902.05 100 31.00 16.00 30.00 54.00
43 Crafty 25.2 x64  2893.78 100 30.00 12.00 36.00 52.00
44 Toga II 4.0 x64  2867.96 100 27.00 14.00 26.00 60.00
45 Sjeng 2010  2858.96 100 26.00 13.00 26.00 61.00
46 Spark 1.0 x64  2770.53 100 17.50 8.00 19.00 73.00

Download the gauntlet PGN games here.

Monday, April 29, 2019

Stockfish 19042419 vs. McCain x3


This is a special match between Stockfish and McCain. The previous Stockfish vs. Clones tests showed that McCain was always below Stockfish in rank. My confidence with the strength tests was shaken when McCain was the clear winner in the recent similar test conducted with the author of McCain. To eliminate the unnecessary rating noise, I decided to make a one on one death match between the two engines. Instead of 100 rounds, I made a longer 800 rounds which is the result of using the 400 positions root opening moves at 2 ply depth with both engines repeating the same position alternately. Effectively, all the first 2 moves combination are used which include many seldom seen moves like 1.  a3 a6. This also fit with my aim of collecting of games which had all these 400 root positions covered.

The tournament conditions are as follows:
Time control: 1 minute base + 1 second increment
Opening: all 400 root positions at 2 ply depth
Resign score: 200cp
Draw score: 20cp after 40 moves
Concurrency: 10 threads
Rounds: 800 with alternating colors

The Stockfish 19042419 compile was drawn from abrok.eu and the McCain X3 was a compiled version done by Corbit. Default parameters were used without touching any, no native opening books and no endgame tablebases. The tournament manager used was cutechess-cli 1.1 linux version.

The result showed that Stockfish is marginally stronger with a 6.14 ELO difference in which the previous results. My confidence in my previous testing results is strengthened. If there is no agreement with the results done with other testers, then so be it. There are many other factors that will make the results inconsistent. This is just my personal test.

Rank Chess Engine  ELO Games Score%  Win%  Draw% Loss%
1 Stockfish 19042419 x64  6.14 800 51.75 24.75 54.00 21.25
2 McCain X3 x64  -6.14 800 48.25 21.25 54.00 24.75

Download the match PGN games 

Sunday, April 28, 2019

Rofchade 2.1 vs. Top Chess Engines


Rofchade 2.1 gained 106 ELO points and moved 7 steps up in the ranking ladder. It caught another actively maintained Schooner 2.0.34 which is now 2 ranks below. It even beat Ethereal 11.25 and Booot 6.3.1 which are higher in rank in the general rating lists.

Rank Chess Engine  ELO Games Score%  Win%  Draw% Loss%
1 Stockfish 10 x64  3653.40 100 89.50 79.00 21.00 0.00
2 Houdini 6.02 x64  3603.38 100 86.50 75.00 23.00 2.00
3 Komodo 11.2.2 x64  3526.34 100 80.50 67.00 27.00 6.00
4 Fire 7.1 x64  3426.36 100 70.00 48.00 44.00 8.00
5 Xiphos 0.5 x64  3356.26 100 61.00 36.00 50.00 14.00
6 Critter 1.6a x64  3320.13 100 56.00 39.00 34.00 27.00
7 Andscacs 0.95 x64  3309.50 100 54.50 34.00 41.00 25.00
8 Shredder 13 x64  3298.93 100 53.00 27.00 52.00 21.00
9 Laser 1.7 x64  3291.90 100 52.00 24.00 56.00 20.00
10 Rofchade 2.1 x64  3277.87 3000 57.42 39.73 35.40 24.87
11 Ethereal 11.25 x64  3263.84 100 48.00 34.00 28.00 38.00
12 Schooner 2.0.34 x64  3253.30 100 46.50 26.00 41.00 33.00
13 Gull 3 x64  3249.77 100 46.00 22.00 48.00 30.00
14 Hannibal 1.7 x64  3239.16 100 44.50 32.00 25.00 43.00
15 Booot 6.3.1 x64  3224.90 100 42.50 18.00 49.00 33.00
16 Nirvana 2.4 x64  3199.48 100 39.00 17.00 44.00 39.00
17 Fizbo 2.0 x64  3192.08 100 38.00 25.00 26.00 49.00
18 Equinox 3.30 x64  3180.83 100 36.50 17.00 39.00 44.00
19 Fritz 15 x64  3173.23 100 35.50 16.00 39.00 45.00
20 Texel 1.07 x64  3161.63 100 34.00 14.00 40.00 46.00
21 Pedone 1.9 x64  3129.39 100 30.00 15.00 30.00 55.00
22 Senpai 2.0 x64  3125.20 100 29.50 9.00 41.00 50.00
23 ICE 3.0.658 x64  3116.68 100 28.50 8.00 41.00 51.00
24 Arasan 21.3 x64  3103.57 100 27.00 15.00 24.00 61.00
25 Protector 1.9.0 x64  3099.10 100 26.50 11.00 31.00 58.00
26 Nemorino 5.00 x64  3094.57 100 26.00 10.00 32.00 58.00
27 Wasp 3.60 x64  3066.12 100 23.00 6.00 34.00 60.00
28 SCTR 1.1f x64  3050.92 100 21.50 6.00 31.00 63.00
29 Vajolet 2.2.7 x64  3040.36 100 20.50 4.00 33.00 63.00
30 Naum 4.6 x64  3000.00 100 17.00 5.00 24.00 71.00
31 Smarthink 1.98 x64  2966.92 100 14.50 8.00 13.00 79.00

Download the gauntlet tournament PGN games here.

Thursday, April 18, 2019

Stockfish 19041623 vs. Clones

This is a test whether the Stockfish clones has something to show. CFish is still on top, Asm Fish moved one rank up. It is expected that Asm Fish will be better one because it is made in Assembly language. Perhaps the translated algorithm is not well optimized. Most showed to be marginally stronger than Stockfish and the others like Shash, Sugar and McCain are regressions. Houdini was included in the test to provide reference of the ELO strength.

The tournament was conducted in an old single 4 core AMD computer with 16GB RAM. Operating system used is Linux 4.16.16 under PCLinuxOs distro. The tournament manager is cutechess 1.1 linux version. All the chess engines had an extension of .exe which means they are all Windows compiled binaries. The 100 round-robin  tournament started yesterday at around 8pm and finished today at around 1:30pm which is less than 24hours. Number of threads used was 20 with no noticeable lag when occasionaly browsing at the same time. There were no time forfeits recorded using the time control of 1 minute base + 1 second increment. The opening book used is a custom selection 50 positions with only 2 ply depth repeating for both colors. Adjudication score for win/loss is 200cp and a draw score of 20cp after 40 moves. This would minimize the idiot dancing Kings in the endgame.

Rank  Chess Engine  ELO  Games  Score%  Win%  Draw% Author
 1  CFish 190324 x64  3559   1000  54.80 25.40 58.80 Ronald De Man
 2  Asm Fish 2019-04-05 x64  3544   1000  52.45 24.60 55.70 Mohammed Li, Lyudmil Antonov
 3  Shark 190416 x64  3543   1000  52.40 23.40 58.00 Krahs
 4  Brain Fish 190414 x64  3542   1000  52.10 25.00 54.20 Thomas Zipproth
 5  Raubfisch X40a x64  3538   1000  51.60 23.80 55.60 Frank Karl Warner
 6  CorChess 3.0 x64  3531   1000  50.45 22.80 55.30 Ivan Ivec
 7  Stockfish 19041623 x64  3531   1000  50.40 21.60 57.60 Romstad, Costalba, Kiiski, Linscott
 8  Shash 8.0 x64  3527   1000  49.80 18.90 61.80 Andrea Manzo
 9  Sugar MCTSL 220319 x64  3514   1000  47.85 22.30 51.10 Marco Zerbinati
 10  McCain X2b x64  3513   1000  47.60 17.60 60.00 Michael Byrne
 11  Houdini 6.02 x64  3467   1000  40.55 13.00 55.10 Robert Houdart

Download the gauntlet tournament games here.

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