New engine releases & news 2021

[AlexChess]

Congratulations to Berserk 4.5.1 author: draw against Stockfish 14! Good performance also of Seer 2.2.0 NNUE in my latest SuperBlitz 50 update

https://www.chess.com/forum/view/game-a ... e-fritz-17

Regards,
AlexChess

[Gabor Szots]

Odonata 0.3.26

https://github.com/akanalytics/odonata/ ... ag/v0.3.26

[matejst]

I've released a new version of Seer here: https://github.com/connormcmonigle/seer ... tag/v2.2.0

Thanks Connor for this new version. I started to test it today, but I see already that the evaluation seems more mature. I wishes you all the best with the development of your interesting, and original engine.

[connor_mcmonigle]

I've released a new version of Seer here: https://github.com/connormcmonigle/seer ... tag/v2.2.0

Thanks Connor for this new version. I started to test it today, but I see already that the evaluation seems more mature. I wishes you all the best with the development of your interesting, and original engine.

Thanks!

[JohnWoe]

Already retired from CC. But since Mayhem did have FRC bugs. Thanks to Carlos pointing it out!
I release Mayhem 5.1. A mistake in fen handling ... My bad !
Expecting +16 ELO

Release: https://github.com/SamuraiDangyo/mayhem ... s/tag/v5.1

This time tested thoroughly. No time losses / illegal moves in any FRC/standard games.

[pgn][Event "Computer Chess Game"]
[Site "pc"]
[Date "2021.07.30"]
[Round "2"]
[White "Hakkapeliitta 3.0"]
[Black "Mayhem 5.1"]
[Result "0-1"]
[TimeControl "60+1"]

1. e4
{+0,12/19}
1... c5 2. Nc3
{+0,43/19 3}
2... Nc6 3. Nf3
{+0,50/19 3}
3... d6 4. d4
{+0,42/18 3}
4... cxd4 5. Nxd4
{+0,47/20 2,9}
5... Nf6 6. Bb5
{+0,45/18 2,8}
6... Bd7 7. O-O
{+0,39/19 4}
7... e6 8. Nxc6
{+0,52/17 2,7}
8... bxc6 9. Ba4
{+0,38/20 2,5}
9... Be7
{+0,03/14 3}
10. Bb3
{+0,37/19 2,5}
10... O-O
{+0,07/13 3}
11. Qe2
{+0,34/19 2,4}
11... Re8
{+0,07/12 3}
12. Rd1
{+0,42/17 2,4}
12... h6
{+0,01/13 3}
13. h3
{+0,43/18 2,3}
13... d5
{+0,02/12 3}
14. Qe3
{+0,37/17 2,4}
14... Kh8
{+0,13/12 3}
15. a4
{+0,57/16 2,2}
15... a5
{+0,28/12 3}
16. Qg3
{+0,22/17 2,4}
16... Rb8
{+0,23/12 2,9}
17. Bd2
{+0,16/16 2,3}
17... Bc5
{+0,35/12 2,9}
18. Be3
{+0,46/18 2,0}
18... Bxe3
{+0,42/13 2,8}
19. Qxe3
{+0,31/21 2,1}
19... Qc7
{+0,35/13 2,7}
20. Qc5
{+0,26/19 3}
20... Rec8
{+0,33/12 2,6}
21. Re1
{+0,41/18 1,9}
21... Be8
{+0,39/12 2,6}
22. Rad1
{+0,32/18 1,8}
22... Kg8
{+0,55/13 2,5}
23. h4
{+0,20/17 2,0}
23... Rb7
{+0,68/12 2,5}
24. Re2
{+0,22/16 1,8}
24... Rb4
{+0,73/11 2,4}
25. g3
{+0,00/18 1,7}
25... Qd8
{+0,83/12 2,4}
26. f3
{+0,12/17 1,7}
26... Qc7
{+0,75/12 2,3}
27. Kg2
{+0,00/18 1,7}
27... Nd7
{+0,81/12 2,3}
28. Qf2
{+0,22/18 1,7}
28... Qb6
{+0,77/11 2,2}
29. Qe1
{+0,07/19 3}
29... Kf8
{+0,54/12 2,2}
30. Na2
{+0,38/17 1,7}
30... Rd4
{+0,38/14 2,1}
31. Rxd4
{+0,44/20 1,6}
31... Qxd4
{+0,33/14 2,1}
32. Nc1
{+0,28/19 1,5}
32... Qb6
{+0,53/13 2,0}
33. Nd3
{+0,38/19 1,6}
33... Rb8
{+0,30/12 2,0}
34. Qd2
{+0,66/18 1,4}
34... Kg8
{+0,38/12 2,0}
35. Qf4
{+0,49/19 1,4}
35... Qd8
{+0,31/11 1,9}
36. Re1
{+0,67/17 2,0}
36... Rb6
{+0,26/11 1,9}
37. Ra1
{+0,76/17 1,4}
37... Qb8
{+0,29/11 1,8}
38. Qxb8
{+0,72/16 1,4}
38... Rxb8
{+0,31/15 1,8}
39. Kf2
{+0,51/17 1,3}
39... Kf8
{+0,31/13 1,8}
40. Re1
{+0,68/16 1,3}
40... h5
{+0,22/13 1,8}
41. Re2
{+0,57/16 2,0}
41... g6
{+0,18/12 1,7}
42. Re1
{+0,57/18 1,4}
42... Rb6
{+0,08/13 1,7}
43. Ke3
{+0,86/19 1,3}
43... Rb8
{+0,11/13 1,7}
44. Kd2
{+0,70/19 1,2}
44... Kg8
{+0,02/12 1,6}
45. Re3
{+0,61/18 1,2}
45... Kf8
{+0,21/13 1,6}
46. Re2
{+0,58/19 2,5}
46... Rc8
{+0,07/12 1,6}
47. Re1
{+0,48/18 1,2}
47... c5
{+0,53/15 1,6}
48. exd5
{+0,40/22 1,2}
48... c4
{+0,50/16 1,6}
49. Bxc4
{+0,36/23 1,2}
49... Rxc4
{+0,30/16 1,5}
50. b3
{+0,59/24 1,2}
50... Rc7
{+0,31/16 1,5}
51. dxe6
{+0,44/22 1,1}
51... Nb8
{+0,34/15 1,5}
52. c4
{+0,85/16 1,1}
52... Nc6
{+0,42/13 1,5}
53. exf7
{+0,63/20 1,2}
53... Rxf7
{+0,43/16 1,5}
54. Nf4
{+0,51/20 1,1}
54... Re7
{+0,45/15 1,4}
55. Re4
{+0,48/21 1,1}
55... Rxe4
{+0,67/17 1,4}
56. fxe4
{+0,14/22 1,1}
56... Ke7
{+0,67/15 1,4}
57. Ke3
{+0,00/25 1,3}
57... Kf6
{+0,74/16 1,4}
58. Nd3
{+0,00/27 1,1}
58... g5
{+0,83/16 1,4}
59. Nc5
{+0,00/25 1,3}
59... Ne5
{+0,85/17 1,4}
60. Nb7
{+0,00/23 1,1}
60... gxh4
{+0,63/18 1,3}
61. gxh4
{+0,00/27 1,1}
61... Nc6
{+0,51/18 1,3}
62. Kf4
{+0,00/29 1,2}
62... Bd7
{+0,59/18 1,3}
63. Nc5
{+0,00/28 1,1}
63... Bg4
{+1,15/18 1,3}
64. Ke3
{+0,00/27 1,1}
64... Ke7
{+1,25/17 1,3}
65. Kd2
{+0,00/23 1,5}
65... Kd6
{+0,84/16 1,3}
66. Nd3
{-0,18/25 1,1}
66... Bf3
{+1,22/17 1,3}
67. c5+
{-0,32/23 1,0}
67... Ke6
{+1,04/17 1,3}
68. Kc3
{-0,84/23 1,1}
68... Kf6
{+0,96/16 1,3}
69. b4
{-0,95/26 1,2}
69... axb4+
{+0,96/18 1,2}
70. Nxb4
{-1,61/26 1,5}
70... Bxe4
{+0,93/18 1,2}
71. Nd3
{-1,84/24 1,0}
71... Kf5
{+1,74/16 1,2}
72. Kc4
{-4,65/24 1,4}
72... Bg2
{+2,18/15 1,2}
73. Ne1
{-1,85/23 1,0}
73... Ne5+
{+2,16/16 1,2}
74. Kc3
{-2,71/24 1,0}
74... Ba8
{+2,35/17 1,2}
75. Nc2
{-2,11/22 1,0}
75... Kg4
{+2,43/16 1,2}
76. Kd4
{-2,45/21 1,0}
76... Nf3+
{+2,15/17 1,2}
77. Kc4
{-2,86/22 1,0}
77... Nxh4
{+3,80/16 1,2}
78. Kb5
{-1,88/21 1,0}
78... Nf5
{+4,32/18 1,2}
79. c6
{-3,81/21 1,0}
79... Ne7
{+3,66/16 1,2}
80. c7
{-5,11/21 1,0}
80... h4
{+3,70/16 1,2}
81. Kc5
{-6,27/23 1,0}
81... Nc8
{+3,69/16 1,2}
82. Ne3+
{-8,47/24 1,0}
82... Kf3
{+3,76/18 1,1}
83. Kd4
{-10,52/23 1,0}
83... Bb7
{+4,64/18 1,1}
84. Nf1
{-10,52/23 1,0}
84... Kf2
{+4,16/18 1,1}
85. Ne3
{-10,68/28 1,0}
85... Bf3
{+9,74/17 1,1}
86. Nc4
{-12,08/20 1,0}
86... h3
{+10,42/17 1,1}
87. Ne5
{-13,32/20 1,0}
87... h2
{+11,41/17 1,1}
88. Nd3+
{-13,67/21 1,0}
88... Kg3
{+11,92/16 1,1}
89. Ne5
{-13,82/20 1,0}
89... h1=Q
{+12,41/15 1,1}
90. Nxf3
{-13,98/19 1,0}
90... Qxf3
{+13,19/14 1,1}
91. a5
{-14,14/17 1,0}
91... Qf4+
{+17,37/13 1,1}
92. Kd5
{-1000,23/18 1,0}
92... Qxc7
{+18,07/13 1,1}
93. a6
{-1000,14/18 1,0}
93... Kf4
{+18,78/11 1,1}
94. Kd4
{-1000,06/19 1,0}
94... Nb6
{+19,72/12 1,1}
95. Kd3
{-1000,05/31 1,0}
95... Nd5
{+104,85/11 1,0}
96. a7
{-1000,04/118 1,0}
96... Ne3
{+104,85/7 0,1}
97. Kd2
{-1000,03/127 0,1}
97... Qc2+
{+104,85/5 0,1}
98. Ke1
{-1000,02/7 0,1}
98... Kg3
{+104,85/4 0,1}
99. a8=Q
{-1000,01/127 0,1}
99... Qf2#
{+104,85/3 0,1}

{Xboard adjudication: Checkmate} 0-1

[/pgn]

Code: Select all

# Testing. No time losses or illegal moves

Standard 2s+0.1s 16pBook
Score of Mayhem 5.1 vs Mayhem 5.0: 415 - 369 - 216  [0.523] 1000
...      Mayhem 5.1 playing White: 213 - 178 - 109  [0.535] 500
...      Mayhem 5.1 playing Black: 202 - 191 - 107  [0.511] 500
...      White vs Black: 404 - 380 - 216  [0.512] 1000
Elo difference: 16.0 +/- 19.1, LOS: 95.0 %, DrawRatio: 21.6 %
Finished match

Standard 1s
Score of Mayhem 5.1 vs Fairy-Max 5.0b: 97 - 2 - 1  [0.975] 100
...      Mayhem 5.1 playing White: 48 - 1 - 1  [0.970] 50
...      Mayhem 5.1 playing Black: 49 - 1 - 0  [0.980] 50
...      White vs Black: 49 - 50 - 1  [0.495] 100
Elo difference: 636.4 +/- nan, LOS: 100.0 %, DrawRatio: 1.0 %
Finished match

Standard 1s NoBook+NoNNUE
Score of Mayhem 5.1 vs Fairy-Max 5.0b: 93 - 5 - 2  [0.940] 100
...      Mayhem 5.1 playing White: 48 - 2 - 0  [0.960] 50
...      Mayhem 5.1 playing Black: 45 - 3 - 2  [0.920] 50
...      White vs Black: 51 - 47 - 2  [0.520] 100
Elo difference: 478.0 +/- 173.1, LOS: 100.0 %, DrawRatio: 2.0 %
Finished match

Standard 1s NoBook+NoNNUE
Score of Mayhem 5.1 vs Fruit 2.1: 92 - 3 - 5  [0.945] 100
...      Mayhem 5.1 playing White: 48 - 2 - 0  [0.960] 50
...      Mayhem 5.1 playing Black: 44 - 1 - 5  [0.930] 50
...      White vs Black: 49 - 46 - 5  [0.515] 100
Elo difference: 494.0 +/- 160.2, LOS: 100.0 %, DrawRatio: 5.0 %
Finished match

Standard 1s
Score of Mayhem 5.1 vs Fruit 2.1: 94 - 3 - 3  [0.955] 100
...      Mayhem 5.1 playing White: 48 - 2 - 0  [0.960] 50
...      Mayhem 5.1 playing Black: 46 - 1 - 3  [0.950] 50
...      White vs Black: 49 - 48 - 3  [0.505] 100
Elo difference: 530.7 +/- 207.2, LOS: 100.0 %, DrawRatio: 3.0 %

Standard 1s
Finished match
Score of Mayhem 5.1 vs Glaurung 2.2: 10 - 84 - 6  [0.130] 100
...      Mayhem 5.1 playing White: 6 - 40 - 4  [0.160] 50
...      Mayhem 5.1 playing Black: 4 - 44 - 2  [0.100] 50
...      White vs Black: 50 - 44 - 6  [0.530] 100
Elo difference: -330.2 +/- 101.2, LOS: 0.0 %, DrawRatio: 6.0 %
Finished match

FRC 1s
Score of Mayhem 5.1 vs Stockfish 12: 10 - 81 - 9  [0.145] 100
...      Mayhem 5.1 playing White: 4 - 41 - 5  [0.130] 50
...      Mayhem 5.1 playing Black: 6 - 40 - 4  [0.160] 50
...      White vs Black: 44 - 47 - 9  [0.485] 100
Elo difference: -308.2 +/- 92.6, LOS: 0.0 %, DrawRatio: 9.0 %
Finished match

FRC 2s
Score of Mayhem 5.1 vs Stockfish 12: 7 - 84 - 9  [0.115] 100
...      Mayhem 5.1 playing White: 1 - 42 - 7  [0.090] 50
...      Mayhem 5.1 playing Black: 6 - 42 - 2  [0.140] 50
...      White vs Black: 43 - 48 - 9  [0.475] 100
Elo difference: -354.5 +/- 101.5, LOS: 0.0 %, DrawRatio: 9.0 %
Finished match

FRC 1s
Score of Mayhem 5.1 vs Glaurung 2.2: 11 - 84 - 5  [0.135] 100
...      Mayhem 5.1 playing White: 5 - 42 - 3  [0.130] 50
...      Mayhem 5.1 playing Black: 6 - 42 - 2  [0.140] 50
...      White vs Black: 47 - 48 - 5  [0.495] 100
Elo difference: -322.7 +/- 100.9, LOS: 0.0 %, DrawRatio: 5.0 %
Finished match

[WinPooh]

GreKo 2021.08:
http://greko.su/greko-2021.08.zip

In single-thread mode it is equivalent to 2021.06.
Most changes are in SMP stability, UCI output (including MultiPV) and code design.
Max.number of threads increased to 16.

[Rebel]

GreKo 2021.08:
http://greko.su/greko-2021.08.zip

In single-thread mode it is equivalent to 2021.06.
Most changes are in SMP stability, UCI output (including MultiPV) and code design.
Max.number of threads increased to 16.

Vladimir, I tried to test Greko several times but if doesn't run well using cute-chess -concurrency

Any idea?

[Archimedes]

- Chess960 / FRC
- MultiPV and `go searchmoves`
- Online Syzygy probing for perfect play with 7 or fewer pieces (off by default)
- Improved history heuristics
- Improved evaluation of passed pawns

Weiss 2.0:
https://github.com/TerjeKir/weiss/releases/tag/v2.0

[WinPooh]

GreKo 2021.08:
http://greko.su/greko-2021.08.zip

In single-thread mode it is equivalent to 2021.06.
Most changes are in SMP stability, UCI output (including MultiPV) and code design.
Max.number of threads increased to 16.

Vladimir, I tried to test Greko several times but if doesn't run well using cute-chess -concurrency

Any idea?

Here is GreKo's section from my engines.json.
Works with cutechess-cli 0.5.1 under Windows without problems.

Code: Select all

   {
      "command" : "GreKo-Windows-64.exe -t 4",
      "name" : "GreKo 2021.08 4-CPU",
      "protocol" : "uci",
      "workingDirectory" : "C:\\VRM\\CHESS\\GREKO\\versions\\2021.08"
   },

[supersharp77]

AlphaChess v1.0 and 1.2..........


https://github.com/xFighter1209/AlphaCh ... s_v1.0.jar


https://github.com/xFighter1209/AlphaCh ... s_v1.2.jar