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The SSDF chess engine rating list, 2022-05

This is the second list of 2022 and in this list we can present six new entries.

The first one out is our new leader in the rating list, Leela Chess Zero 0.28.2. After the first 280 games played, it has received an impressive rating of 3591, which is currently 19 points stronger than the older Lc0-version. It leads the rating list with 15 points ahead of Stockfish 13. As with the formerly tested version, we have used an Nvidia RTX 3060 Ti graphic card for the testing. We have used the 30 blocks + 384 filter network, named: 611213 (date 2022-01-06), and as opening book we have used the free opening book “Perfect2021.abk” by Sedat Canbaz.

Our second newcomer is Wasp 5.5 from John Stanback. After the first 194 games, it has received a rating of 3395. This is at the moment 17 points ahead of the formerly tested 5.0 version and at the same time 106 points ahead of the Wasp 4.5 version. Wasp uses its own included opening book.

We are also glad to be able to introduce a new Chiron 5.01 version on our rating list. We introduced Chiron 3.01 by Ubaldo Andrea Farina back in the August list of 2016. Since that was before the AMD 1800X was introduced as hardware on our rating list, Chiron 3.01 was only tested on our Intel Q6600 hardware at the time. We have now tested Chiron 5.01 on both our hardware levels. On our 1800X hardware, Chiron 5.01 has reached a rating of 3356 after 320 games played. And on our Q6600 hardware, Chiron 5.01 has reached a rating of 3330 after 280 games played. This is at the moment 154 points over the former 3.01 version, so a very nice improvement! As opening book we have used the “Perfect2021.abk” opening book by Sedat Canbaz.

Our fourth new program on this list are the latest Marvin 5.2.0 version of Martin Danielsson. After 320 played games it has reached a rating of 3330, and this is currently 9 points ahead of the formerly tested 5.1.0 version. As with the 5.1.0 version, it is using its own opening book in the testing.

And last, but not least, we are also able to introduce a golden oldie from 1989! It is Richard Lang’s Mephisto Roma II 68000-module, which was released in 1989, two years after the initial Mephisto Roma was introduced on the market. The special thing with this version was that it was the only 16 bit Motorola 68000 based engine which could be used in the Mephisto Mobil-board, a small handheld version of their modular series of chess boards. Perhaps because of this, they had to lower the clock frequency on the 68000 processor. It has a frequency of 10 MHz instead of the 12 MHz which was used on the 1987-version of the Roma program. As nothing else was changed between the two programs, the Roma II should in theory be somewhat lower rated than the older Roma program with its higher clock frequency. But, after the first 100 games, the Roma II has yet managed to position itself 27 points higher than the 1987 version and gained a rating of 1903!As the old Roma 68000 12 MHz have a staggering amount of 1519 manually played games under its belt, one can safely assume that the rating of Roma II will become lower as more games are played, and the error bars on the Roma II are also still high compared to the more trustworthy rating of its older sibling.

1 Lc0 0.28.2 Cuda-611213 3060Ti, 3591

Stoc13 1800X 20,5-19,5 Dra251 1800X 21-19 Ko14 1800X 27,5-12,5

Wasp55 1800X 30-10 Wasp5 1800X 31-9 Chi5 1800X 31,5-8,5

Mar52 1800X 37,5-2,5

21 Wasp 5.5 x64 1800X 3.6 GHz, 3395

Lc028 3060Ti 10-30 Dra251 1800X 10-30 Boo65 1800X 17-23

Booot6 1800X 20-14 Mar52 1800X 23-17

27 Chiron 5.01 x64 1800X 3.6 GHz, 3356

Lc028 3060Ti 8,5-31,5 Stoc14 1800X 7-33 Arasa23 1800X 15-25

Boo65 1800X 15-25 Dra MC 1800X 20-20 Wasp5 1800X 18,5-21,5

Mar52 1800X 20,5-19,5 Wasp45 1800X 22-18

29 Chiron 5.01 x64 Q6600 2.4 GHz, 3330

Ped31 Q6600 23,5-16,5 Boo65 Q6600 18-22 DShre13 Q6600 17,5-22,5

Mar51 Q6600 25,5-14,5 DRybka4 Q6600 29-11 Chiro3 Q6600 28,5-11,5

Spike14 Q6600 31,5-8,5

30 Marvin 5.2.0 x64 1800X 3.6 GHz, 3330

Lc028 3060Ti 2,5-37,5 Stoc13 1800X 5-35 Stoc14 1800X 8,5-31,5

Boo65 1800X 17,5-22,5 Wasp55 1800X 17-23 Ped3 1800X 15,5-24,5

Chi5 1800X 19,5-20,5 Wasp45 1800X 22,5-17,5

50 Mephisto Roma II 68000 10 MHz, 1903

London 68020 4,5-15,5 Sapphire II 7-13 Meph. Milano 11,5-8,5

Kasp. GK-2000 13-7 Rebell 5 MHz 14-6

Table 1

The recently tested ‘Selected 50’ from SSDF rating list ‘2022-05’, 160235 games played by 424 computers

THE SSDF RATING LIST 2021-05-20 160235 games played by 424 computers

1Lc0 0.28.2 Cuda-611213 3060Ti359148−4328071%3438
2Stockfish 13 x64 1800X 3.6 GHz357737−3444070%3426
3Lc0 0.26.3 Cuda(67362) 3060Ti357229−2768068%3442
4Dragon Komodo 2.51 x64 1800X 3.6 GHz356642−3932065%3456
5Stockfish 14 x64 1800X 3.6 GHz355539−3736066%3444
6Stockfish 12 NNUE x64 1800X 3.6 GHz355530−2956062%3465
7Dragon by Komodo x64 1800X 3.6 GHz354434−3246063%3449
8Stockfish 11 x64 1800X 3.6 GHz353736−3445070%3393
9Stockfish 10 x64 1800X 3.6 GHz351425−2488068%3378
10Dragon Komodo 2 MCTS x64 1800X 3.6 GHz347945−4424055%3444
11Stockfish 9 x64 1800X 3.6 GHz347626−2488270%3330
12Komodo 13.1 x64 1800X 3.6 GHz346330−2956062%3379
13Komodo 14 x64 1800X 3.6 GHz346131−3148053%3442
14Komodo 13.02 x64 1800X 3.6 GHz345730−2960065%3346
15Komodo 12.3 x64 1800X 3.6 GHz344727−2676066%3329
16Arasan 23.01 x64 1800X 3.6 GHz344339−3832052%3429
17Stockfish 9 x64 Q6600 2.4 GHz343932−3148056%3394
18Booot 6.5 x64 1800X 3.6 GHz342638−3832049%3435
19Pedone 3.1 x64 1800X 3.6 GHz342346−4722048%3433
20Dragon Komodo MCTS x64 1800X 3.6 GHz340438−3832052%3391
21Wasp 5.5 x64 1800X 3.6 GHz339549−5119441%3456
22Wasp 5 x64 1800X 3.6 GHz337841−4428038%3470
23Booot 6.4 x64 1800X 3.6 GHz336636−3636051%3359
24Arasan 22.3 x64 1800X 3.6 GHz335941−4428036%3454
25Pedone 3.1 x64 Q6600 2.4 GHZ335941−3930060%3290
26Booot 6.5 x64 Q6600 2.4 GHz335944−4128062%3272
27Chiron 5.01 x64 1800X 3.6 GHz335638−4032040%3427
28Deep Shredder 13 x64 1800X 3.6 GHz335324−2488064%3252
29Chiron 5.01 x64 Q6600 2.4 GHz333043−4128062%3244
30Marvin 5.2.0 x64 1800X 3.6 GHz333039−4232034%3447
31Marvin 5.1.0 x64 1800X 3.6 GHz332144−4724037%3412
32Wasp 4.5 x64 1800X 3.6 GHz328948−5422029%3447
33Vajolet2 2.8 x64 1800X 3.6 GHz328827−2865038%3372
34Marvin 5.1.0 x64 Q6600 2.4 GHz321846−4822043%3270
35Deep Hiarcs 14 1800X 3.6 GHz321123−2488038%3295
36Deep Rybka 4 x64 Q6600 2.4 GHz319418−18152862%3107
37Revelation 2 Hiarcs 14.1 PXA320 800 MHz292547−4522856%2882
38Chessmaster King 3.5 x64 Q6600 2.4 GHz285824−2593230%3006
39Revelation Hiarcs 13.3 PXA255 500 MHz277257−5217766%2660
40Revelation Shredder 12 PXA255 500 MHz270660−5814056%2666
41Revelation Rybka 2.2 PXA255 500 MHz263545−4326063%2546
42Revelation Deep Sjeng 3 PXA255 500 MHz260062−6712041%2665
43Millennium The King Exclusive 300 MHz253552−5118056%2496
44Revelation Ruffian 2.1 PXA255 500 MHz234668−7110045%2384
45Millennium ChessGenius Excl. M7 300 MHz224352−4919058%2189
46Mephisto London 68030 33 MHz219431−3148250%2192
47Millennium ChessGenius Pro M4 120 MHz216259−5416063%2066
48Mephisto London 68020 12 MHz209261−5416668%1961
49Millennium ChessGenius ARM M4 48 MHz206945−4325158%2015
50Mephisto Roma II 68000 10 MHz190369−6910050%1903