New version chess engine (java): Lozza 4.0

Lozza - Javascript chess engine inspired by Fabien Letouzey's Fruit 2.1. Lozza was an exercise in principal variation search and hand-coded evaluation. It's easy to use Lozza into your web projects. Communication is via the UCI protocol, which also allows it to be used offline in chess user interfaces via Nodejs (etc.).

v.4.0:

v4 uses a bigger network, loads weights from a file and has some minor optimisations. The network was trained with trainer.js using self-play data generated with datagen.js.

Please use the latest version of Node for best performance:-

https://nodejs.org

Note that Lozza 4 will not start unless Node v20 or above is used.

Author - Colin Jenkins Rating Chess Engines Diary CEDR=2847

Lozza 3.0 JA vs other engines:

Rhetoric 1.4.3	3.5/10	-3	10 Games
Eveann 2.1	2/7	-3	7 Games
Stockfish 17	0/6	-6	6 Games
4ku 5.1	0/6	-6	6 Games
Eubos 3.7 JA	4/4	+4	4 Games
Skiull 0.6	4/4	+4	4 Games
CT800 1.46	1.5/4	-1	4 Games
Donut dev.38ee0c6 JA	0/4	-4	4 Games
Schoenemann 0.3.0	0/4	-4	4 Games
Rebel-EAS 2.0	0/4	-4	4 Games
Quanticade Electra 0.9	0/4	-4	4 Games
SF-PRO 18.09.2024	0/4	-4	4 Games
Expositor 4WR02	0/4	-4	4 Games
Yuliana 5.0	0/4	-4	4 Games
YuliGM Strong 180824	0/4	-4	4 Games
HypnoS 220824bis	0/4	-4	4 Games
JigSaw 6.0	0/4	-4	4 Games
Motor 0.7.0	0/4	-4	4 Games
Patricia 3.1	0/4	-4	4 Games
Raid 3.6 TR	0/4	-4	4 Games
Kairuku 1.0.1 JA	3/3	+3	3 Games

Lozza 4.0 download