New engine releases & news H1 2023

[Damir]

Viridithas 8.1.0
Thanks to the Author cosmobobak Cosmo Bobak.

A superhuman chess engine . UCI chess engine written in Rust .
Download :

https://github.com/cosmobobak/viriditha ... s/tag/v8.1.
0

All Aboard The Score Normalisation Train!
This release adds WLD probability-adjusted reporting to Viridithas. No strength differenceexists compared to 8.0.0, but Viridithas's score cp output is now normalised such that 100 centipawns == 50% chance of winning, and Viri now outputs WDL probabilities per mil.

PS: the engine is very strong but unfortunately it crashes and runs out of time. I suspect it has to do with 6 men tbs. Maybe Author can take a look at his tbs code and see if there might not be an error or a bug somewhere so can fix the broken code.

[Damir]

It appears there is something wrong with the link I posted.

Here is new link:

https://github.com/cosmobobak/viriditha ... tag/v8.1.0

[Alex2262]

Altair 2.0.0

A chess engine written in C++ with mailbox board representation. Should be around 2800-2850 CCRL.
https://github.com/Alex2262/AltairChess ... tag/v2.0.0

If anyone could test it for blitz and rapid, that would be great, thanks!

[Dariusz]

Altair 2.0.0

A chess engine written in C++ with mailbox board representation. Should be around 2800-2850 CCRL.
https://github.com/Alex2262/AltairChess ... tag/v2.0.0

If anyone could test it for blitz and rapid, that would be great, thanks!

Alex, I will test Altair as part of the MCERL competition.
Thank you for your engine!

[Alex2262]

Thanks so much! I appreciate it

[Gabor Szots]

Altair 2.0.0

A chess engine written in C++ with mailbox board representation. Should be around 2800-2850 CCRL.
https://github.com/Alex2262/AltairChess ... tag/v2.0.0

If anyone could test it for blitz and rapid, that would be great, thanks!

It will appear in the next CCRL update.

[pkrisz]

Renegade 0.10.0
https://github.com/pkrisz99/Renegade/re ... ag/v0.10.0

Gain of about +200 over version 0.9.0 (+300 in self-play), and something like +650 since the post in January.
Still not that great, though it's slowly but surely getting better. The main improvements of this version comes from the tuned evaluation and more aggressive pruning.
Strength: ~2450 (according to my limited testing, take it with a grain of salt)

[Carbec]

Zangdar 2.14.03

+ Opening Book
+ Parrallel , with Lazy SMP and shared Hash Table
+ Better evaluation : positional elements, piece mobility
+ Deeper search : Late Move reduction, Razoring

I included two binaries, windows and linux. Also a Makefile for those who want to compile it.

Estimated elo 2550.
Still a long way to go !!

https://github.com/Carbecq/Zangdar

[Graham Banks]

Zangdar 2.14.03

+ Opening Book
+ Parrallel , with Lazy SMP and shared Hash Table
+ Better evaluation : positional elements, piece mobility
+ Deeper search : Late Move reduction, Razoring

I included two binaries, windows and linux. Also a Makefile for those who want to compile it.

Estimated elo 2550.
Still a long way to go !!

https://github.com/Carbecq/Zangdar

Does it understand the use of a generis opening book, and repeating time controls?
I tried to run the previous version in ChessGUI, but it failed to show any thinking output, or make a move.

[Carbec]

Hi,

I use the "polyglot" format. By default, the book is disabled, and can be enabled with the uci option, like in Arena.
setoption name OwnBook value true
BUT ! I forgot that the book's location is "hard coded" in the source, and can be modified by a compiler define.
My tests were ok obviously! Im sorry to that.
I need to add an uci option to specify where is the book.

If the program don't find the book, it will search for a move.
I only use Arena, for 2 reasons. first it has a log window; and second it works both with linux and windows.
What is ChessGui ? an interface like Arena ?
This version is the first one to have an opening book.
But I don't understand your question about "repeating time controls" ?