New engine releases & news H2 2025

[Frank Quisinsky]

1. Cinder 0.3.1 and Cinder 0.3.0
https://github.com/brunocodutra/cinder
by Bruno Dutra, Germany

2. Alexandria 8.1.0
https://github.com/PGG106/Alexandria
by Guiseppe Pagano, Italy

3. Stockfish 250816 dev
https://github.com/official-stockfish/S ... h/releases
by the Stockfish developers

[OliverBr]

OliThink 5.11.9 has been released.

Now, it is not only the smallest version ever with 1291 lines of code, it is also the strongest so far.
The engine is still not using any external library, nor precomputed data like EGTB, Texel-Tuning or NNUE.
Additionally there have been quite a number of changes in protocol handling because of some smaller issues when playing on lichess.org.

Sourcen and exectuable have been pushed to GitHub. Here is how much the engine has developed since the last long druing version 5.10.5:

Code: Select all

   # PLAYER             :  RATING  ERROR   POINTS  PLAYED   (%)      W      D      L  D(%)  CFS(%)
   1 OliThink 5.11.9    :      77   ----  30413.5   50000  60.8  22108  16611  11281  33.2     ---
   2 OliThink 5.10.5    :       0      3  19586.5   50000  39.2  11281  16611  22108  33.2     100

White advantage = 24.13 +/- 1.33
Draw rate (equal opponents) = 34.59 % +/- 0.20

[Frank Quisinsky]

1. Weiawaga 6.0.0
https://github.com/Heiaha/Weiawaga
by Kyle Krowpman, USA

Last compiles by Jim Ablett is 5.0.0 from January 2024

[Frank Quisinsky]

Clover 9.0
https://github.com/lucametehau/CloverEngine
by Luca-Mihnea Metehau, Romania

[Frank Quisinsky]

PlentyChess 6.0.18
https://github.com/Yoshie2000/PlentyChess/releases
by Patrick Leonhardt, Germany

[Graham Banks]

PlentyChess 6.0.18
https://github.com/Yoshie2000/PlentyChess/releases
by Patrick Leonhardt, Germany

Pre-release.

[Pvt. Ryan]

Rebel-Extreme 1.1

REBEL-EXTREME 1.1 is our new STYLE engine where the focus is on playing style and ELO has a less priority. Nevertheless the engine has an estimated CEGT rating of 3350 elo.

Hi. I am comparing the previous version to the current 1.1, executables have the same file size- 138,717 KB.

info string Rebel-EXTREME
info string (C) Ed Schroder, Chris Whittington 2003-2024
info string Code Base : Chris Whittington
info string NNUE development : Ed Schroder
info string ==============================

info string Rebel-Extreme-1.1
info string (C) Ed Schroder, Chris Whittington 2003-2025
info string Code Base : Chris Whittington
info string NNUE development : Ed Schroder
info string ==============================

Cheers.

[pohl4711]

Rebel-Extreme 1.1

REBEL-EXTREME 1.1 is our new STYLE engine where the focus is on playing style and ELO has a less priority. Nevertheless the engine has an estimated CEGT rating of 3350 elo.

Hi. I am comparing the previous version to the current 1.1, executables have the same file size- 138,717 KB.

info string Rebel-EXTREME
info string (C) Ed Schroder, Chris Whittington 2003-2024
info string Code Base : Chris Whittington
info string NNUE development : Ed Schroder
info string ==============================

info string Rebel-Extreme-1.1
info string (C) Ed Schroder, Chris Whittington 2003-2025
info string Code Base : Chris Whittington
info string NNUE development : Ed Schroder
info string ==============================

Cheers.

All fine. The engine-container is the same, only the net differs. So, the binary-length of the engine is not affected, until the net-structure stays unchanged.

[Damir]

Alexandria 8.1.0 has a bug. After 3 games on Playchess server, I got a message, '' Engine caused exception'' and resigned a game when still in book. Perhaps an author can take a look and see what is wrong with it.

[cc2150dx]

Lc0 v0.32.0

https://github.com/LeelaChessZero/lc0/r ... ag/v0.32.0