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============================== My email: jotes@go2.pl



New version chess engine (java): Lozza 2.6 JA

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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.2.6
Javascript chess engine converted to standalone executable.

Lozza 2.6 64 ja
Play Lozza online here:-
https://op12no2.github.io/lozza-ui/

Changes
2.5 10/02/23 Test for draws in QS. Bench 4549628.
2.5 10/02/23 Simplify UCI reporting.
2.5 09/02/23 Process command line args when invoked with Node.
2.5 09/02/23 Add a bench command using Ethereal FENs at depth 9. Bench 4625388.
2.5 09/02/23 Use TT in qsearch, but do not overwrite existing entries with depth > 0.
2.5 05/02/23 Clear best move on fail low and don't allow timeout until there is a best move.
2.5 03/02/23 Return/store bestScore not oAlpha on fail low in search.
2.5 03/02/23 Increase/decrease alpha/beta on fail high/low during ID.
2.5 03/02/23 Update best move on fail high.
2.5 01/02/23 Round the pawn and attack values before the phase calculation. Retune.
2.5 01/02/23 Don't use end game tempo. Retune.
2.5 14/01/23 Retune using +- mode.
2.5 29/12/22 Add eval to TT.
2.5 28/12/22 Add doubled rooks to eval.
2.5 23/11/22 Simplify mobility weights for small tuning dataset.
2.5 21/11/22 Add basic pawn chain feature to eval.
2.5 21/11/22 Retune using Zurichess's quiet-labeled.epd.
2.5 22/11/22 Make eval weights more visible (and in testing/tuner.js).

Author - Colin Jenkins Rating Chess Engines Diary CEDR=2847


Individual statistics Lozza 2.2 
FoxSEE 8.29/10+810 Games
Colossus 2022a4.5/6+36 Games
Barbarossa 0.6.03.5/6+16 Games
Critter 1.6a0.5/6-56 Games
Wasp 5.500/6-66 Games
Arasan 23.30/6-66 Games
Stockfish 150/6-66 Games
FoxSEE 7.35.04/4+44 Games
Neuromancer 1.04/4+44 Games
Ceechess 1.44/4+44 Games
Galjoen 0.41.24/4+44 Games
Pigeon 1.5.1 fix4/4+44 Games
SeeChess 1.24/4+44 Games
Loki 3.5.03.5/4+34 Games
Admete 1.5.03.5/4+34 Games
Cosette 5.13.5/4+34 Games
Isa 2.0.833.5/4+34 Games
MinimalChess 0.63/4+24 Games
Gargantua 1.02/4+04 Games
Waxman 20202/4+04 Games
Alexandria 2.21/4-24 Games

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