New engine releases & news 2021

[Brunetti]

Black Marlin 1.0 released.

https://github.com/dsekercioglu/blackmarlin

No particular improvements at the moment in 1'+1" rating.

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Engines in Black Marlin 1.0 64-bit family
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Rank  Elo   ±  Engine                                      Score Games  Wins Draws  Loss  Oppo time stal ille
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   1. 2818  22 Black Marlin 1.0 dev2 64-bit                  51%   760   290   195   275   +13   0%   0%   0%
   2. 2817  39 Black Marlin 1.0 64-bit                       53%   250   103    60    87   +28   0%   0%   0%
   3. 2781  23 Black Marlin 1.0 dev 64-bit                   50%   712   263   189   260   +10   0%   0%   0%
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Alex

[Brunetti]

I read Vincent D.'s suggestion about not storing draw in the TT and gave it a try.
Seems to help caffeinatedpawn a bit (elo-wise).

Hi,

the new version (3. below) is a little worse than the previous one, in bullet:

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Engines in CaffeinatedPawn 0346f64 64-bit family
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Rank  Elo   ±  Engine                                      Score Games  Wins Draws  Loss  Oppo time stal ille
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   1. 1763  22 CaffeinatedPawn 95458ab 64-bit                42%   899   308   146   445   -63   0%   0%   0%
   2. 1759  22 CaffeinatedPawn 6d214df 64-bit                43%   890   299   167   424   -56   0%   0%   0%
   3. 1724  37 CaffeinatedPawn 0346f64 64-bit                44%   321   114    52   155   -59   0%   0%   0%
   4. 1627  33 CaffeinatedPawn 46203a4 64-bit                44%   451   193    15   243   -50   0%  22%   0%
   5. 1586  22 CaffeinatedPawn 54311af 64-bit                45%   905   332   158   415   -39   0%   0%   0%
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Alex

[Damir]

Eggnog NNUE 2.0

Thanks to the Author LeviGibson dance2

chess engine written in C!

https://github.com/LeviGibson/eggnog-ch ... es/tag/2.0

Eggnog 2.0 has many improvements 1.0 in both evaluation and search. The interface has stayed the same.

[Brunetti]

Hopper 1.4 released.

https://github.com/jonathanmcdermid/Hopper-Chess-Engine

100+ improvement!

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Engines in Hopper 1.4 64-bit family
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Rank  Elo   ±  Engine                                      Score Games  Wins Draws  Loss  Oppo time stal ille
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   1. 2097  34 Hopper 1.4 64-bit                             50%   323   129    68   126    +9  20%   3%   0%
   2. 1980  22 Hopper 1.3 64-bit                             48%   837   335   131   371   -18   1%   1%   0%
   3. 1959  23 Hopper 1.1 64-bit                             47%   755   303    97   355   -30  19%   1%   0%
   4. 1958  22 Hopper 1.2 64-bit                             47%   809   308   152   349   -19   0%   0%   0%
   5. 1867  22 Hopper 20211004 64-bit                        46%   862   327   144   391   -28   1%   0%   0%
   6. 1814  23 Hopper 20211003 64-bit                        48%   768   323    94   351   -14   1%   1%   1%
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Alex

[algerbrex]

Zahak 8.0 is released with hopefully +300 elo increase

You can download it here, https://github.com/amanjpro/zahak/releases/tag/8.0

And you can read about the release here: https://zahak.amanj.me/posts/meet-zahak-8/

Zahak 8.0 will be participating in the upcoming TCEC Swiss 2 event!

Against Zahak 7.1

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ELO   | 301.91 +- 12.36 (95%)
CONF  | 40.0+0.40s Threads=1 Hash=64MB
GAMES | N: 3520 W: 2602 L: 135 D: 783

Discussions can go to here: forum3/viewtopic.php?f=2&t=76855&start=110

Very nice to see Amanj, congratulations!

[Damir]

Blunder 7.1.0
Thanks to the Author Christian Dean algerbrex :sun_bespectacled:

A UCI compatible chess engine written in Golang .

https://github.com/algerbrex/blunder/re ... tag/v7.1.0

The release of this version includes late-move reductions, basic futility pruning, as well as a static-exchange evaluation routine, as well as a little refractoring and bug-fixing here and there.

Search
Late-move reductions
Futility pruning
Static-exchange evaluation
The addition of these features seem promising and show a little over a 100 point Elo gain in self-play (tc=inf/10+0.1):

Score of Blunder 7.1.0 vs Blunder 7.0.0: 347 - 146 - 133 [0.661] 626
... Blunder 7.1.0 playing White: 174 - 66 - 74 [0.672] 314
... Blunder 7.1.0 playing Black: 173 - 80 - 59 [0.649] 312
... White vs Black: 254 - 239 - 133 [0.512] 626
Elo difference: 115.6 +/- 25.1, LOS: 100.0 %, DrawRatio: 21.2 %
SPRT: llr 2.96 (100.5%), lbound -2.94, ubound 2.94 - H1 was accepted
Finished match
The Elo gains for each feature can be seen in the commit history. Going forward this will be the place where I try to document Elo gains (if any) from new features.

[Brunetti]

Blank 1.0.1. released.

https://github.com/RyanLauQF/BLANK-Ches ... tag/v1.0.1

Bullet strength similar to previous version.

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Engines in Blank 1.0 64-bit family
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Rank  Elo   ±  Engine                                      Score Games  Wins Draws  Loss  Oppo time stal ille
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   1. 1561  22 Blank 1.0 64-bit                              45%   838   309   144   385   -42   0%   4%   0%
   2. 1529  29 Blank 1.0.1 64-bit                            44%   512   181    86   245   -54   0%   4%   0%
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Alex

[Brunetti]

Stockfish 14.1 is (almost) out!

https://github.com/official-stockfish/S ... /pull/3763

Tests running as soon as the official exe will be available.

Alex

[Witek]

Caissa 0.2 Released.

https://github.com/Witek902/Caissa/releases/tag/0.2

• Fixed multithreading crash

• Improved transposition table

• Included NNUE file

• Gained ~100 Elo compared to version 0.1

[Brunetti]

Blunder 7.1.0

Bullet rating improved of around 100 points!

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Engines in Blunder 7.1.0 64-bit family
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Rank  Elo   ±  Engine                                      Score Games  Wins Draws  Loss  Oppo time stal ille
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   1. 2446  35 Blunder 7.1.0 64-bit                          51%   318   136    55   127    +7   0%   0%   0%
   2. 2348  22 Blunder 7.0.0 64-bit                          48%   817   316   153   348   -14   0%   0%   0%
   3. 2230  22 Blunder 6.0.0 64-bit                          49%   863   358   131   374   -14   0%   0%   0%
   4. 2212  23 Blunder 6.1.0 64-bit                          49%   831   347   128   356    -9   0%   0%   0%
   5. 2158  22 Blunder 5.0.0 64-bit                          52%   851   375   127   349   +11   0%   0%   0%
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Alex