New engine releases & news H1 2026

[op12no2]

Lozza 9

https://github.com/op12no2/lozza/releases/tag/9

For the first time binaries for Windows, Linux, Mac ARM and Mac x86 are included as well as the Javascript file. The binaries are bigger than your usual chess engine because they embed a Javascript runtime.

[Frank Quisinsky]

Prune 3.1.0
https://github.com/tgirolami09/Prune
by T. GIROLAMI, J. BIENVENUE, France

Publius 1.1 (a fix, date: 260109)
https://github.com/nescitus/publius
by Pawel Koziol, Poland

[Andres Valverde]

Caligula 3.1 released

https://sites.google.com/view/dirtychess/dirtychess

Mostly a bugfix version, 10/15 ELO improvement at long TC

Updated with new Jim Ablett's compiles. Thx Jim!

[Frank Quisinsky]

RukChess 4.2.0
https://github.com/Ilya-Ruk/RukChess
by Ilya Rukavishnikov, Russia

Note:
For months, I have also been collecting the engine updates on a separate page (around the TOP-250 only).
No advertising, no hidden statistics, no graphics (just country flags and my logo). I'm trying to make the site very fast.
It is, of course, possible that something has been forgotten or that mistakes have been made.

https://www.amateurschach.de/main/_engines.htm (sorted by release date of engines)
https://www.amateurschach.de/main/_engines-a.htm (sorted by name of engines)

Best
Frank

[Frank Quisinsky]

pawnocchio 1.9.1
https://github.com/JonathanHallstrom/pawnocchio
Jonathan Hallström, Sweden

Rusty-Rival 1.0.19
https://github.com/chris-moreton/rusty-rival
Chris Moreton, England

RivalChess 40.0.0
https://github.com/chris-moreton/rivalchess-uci
Chris Moreton, England

[ZlomenyMesic]

Kreveta 2.2.2

Estimated Elo around 2100, would really appreciate CCRL testing for this version
https://github.com/ZlomenyMesic/Kreveta ... tag/v2.2.2