New engine releases & news 2021

[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?

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"
   },

Ah, your engine is also UCI, it looks and plays Winboard

Have a match running, see the proper sub forum.

http://talkchess.com/forum3/viewtopic.p ... db#p901447

[WinPooh]

Ah, your engine is also UCI, it looks and plays Winboard

Have a match running, see the proper sub forum.

http://talkchess.com/forum3/viewtopic.p ... db#p901447

If you replace "uci" with "xboard" in this config I hope it will work as well. GreKo supports both protocols. I find xboard output much easier to debug manually in console mode. However I don't know with which protocol GreKo is faster/stronger.

[ydebilloez]

Belofte 2.1.3 has been released.

It has a huge NPS improvement, resulting probably in a gain in ELO. It should beat hands down previous versions 2.0.x, 2.1.0, 2.1.1 and 2.1.2. Will have to see how this translates in the CCRL list.

Please see a separate belofte progress thread http://talkchess.com/forum3/viewtopic.p ... 10#p901463 for more details.

[Gabor Szots]

Belofte 2.1.3 has been released.

It has a huge NPS improvement, resulting probably in a gain in ELO. It should beat hands down previous versions 2.0.x, 2.1.0, 2.1.1 and 2.1.2. Will have to see how this translates in the CCRL list.

Please see a separate belofte progress thread http://talkchess.com/forum3/viewtopic.p ... 10#p901463 for more details.

Thanks Yves.

[ydebilloez]

Thanks Yves.

Thanks Gabor for your error report. The release has been updated and at the same time, a 32 bit windows version was added. (compiled from ReactOS !!)

For those curious, the previous version 2.1.3 (yesterdays) reported another evaluation method being suggested as default, while this was not the case. The bug did not break anything, but creates some confusion on what evaluation method is actually used. This has now been fixed and uci init correctly gets the selected default evaluation reported.

[supersharp77]

https://github.com/oriyonay/Starfish

https://github.com/oriyonay/Starfish/ra ... arfish.jar

Starfish Chess Engine (Java) By Ori Yonay "Starfish".......

NOTE: I MADE THIS YEARS AGO! IT'S NOT VERY EFFICIENT!

A simple chess engine that implements alpha-beta pruning in Java. It's not very efficient but it can play decent chess

Download Starfish.jar

Current features:

Alpha-beta pruning
Undo moves
Import / export FEN
Material & position evaluation
Castling
Promotion (to queen, for now)
TODO:

En Passant functionality (implemented but commented out due to bugs)
Implement knight promotion?
Get game state (opening, middlegame, or endgame) and play accordingly
Implement UCI protocol
About

Simple chess engine using alpha-beta pruning

Resources
Readme
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Languages

Java
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© 2021 GitHub, Inc."

[algerbrex]

Hi everyone!

I just released version 4.0.0 of my new engine Blunder, and I was hoping to get it tested on CCRL/CGET!

From self-play and some testing with other engines I estimate that Blunder's current rating is between ~1800 to ~1700 Elo. It doesn't have any configurable options (no transposition table, opening book, et al. right now) and can play in rapid and/or blitz time controls. A Windows executable for the latest version, 4.0.0, can be found in the zip file here: https://github.com/algerbrex/blunder/re ... tag/v4.0.0.

Thanks!

[Gabor Szots]

Hi everyone!

I just released version 4.0.0 of my new engine Blunder, and I was hoping to get it tested on CCRL/CGET!

From self-play and some testing with other engines I estimate that Blunder's current rating is between ~1800 to ~1700 Elo. It doesn't have any configurable options (no transposition table, opening book, et al. right now) and can play in rapid and/or blitz time controls. A Windows executable for the latest version, 4.0.0, can be found in the zip file here: https://github.com/algerbrex/blunder/re ... tag/v4.0.0.

Thanks!

Hi Christian,

I have put it in my testing queue.

[algerbrex]

Hi everyone!

I just released version 4.0.0 of my new engine Blunder, and I was hoping to get it tested on CCRL/CGET!

From self-play and some testing with other engines I estimate that Blunder's current rating is between ~1800 to ~1700 Elo. It doesn't have any configurable options (no transposition table, opening book, et al. right now) and can play in rapid and/or blitz time controls. A Windows executable for the latest version, 4.0.0, can be found in the zip file here: https://github.com/algerbrex/blunder/re ... tag/v4.0.0.

Thanks!

Hi Christian,

I have put it in my testing queue.

Sounds good, thank you.

[j.t.]

I added Chess960/FRC support in Nalwald 1.12.
Only irrelevant performance improvements (less than 10 points, probably), so no need to test this.
Rare crashes and memory consumption issues have been fixed.
I also added a small easteregg, it's not hard to find :D. It doesn't work very well on Windows though, and also works best with a Unicode compatible console.
Chess960 I only tested with cutechess.
Also, I noticed that windows executables are up to 10% percent slower than Linux executables. I don't know what's the reason for this, and I don't know if this was also an issue for previous releases, but at least it doesn't seem like the Windows Nalwald 1.12 is slower than Windows Nalwald 1.11, so I don't think this will be a performance regression.