RukChess 4.2.0 - new version chess engine

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Chess engines: RukChess NNUE
Author: Ilya-Ruk (Ilya Rukavishnikov)   Rating CEDR=3331

v.4.2.0:

Main executable file, requires net-7342fb032855.nnue file with neural network (included in the release).
net-7342fb032855.nnue
Neural network for RukChess 3.x.x/4.1.x/4.2.x, trained with RukChessTrainer based on data obtained from CCRL 40/2 Archive (04.02.2020), CCRL Blitz (29.03.2025) and CCRL 40/15 (28.03.2025)
book_.txt
Opening book (587604 positions; up to 12 moves) for RukChess 3.x.x/4.x.x, generated based on data obtained from CCRL 40/15 (05.10.2024) and CCRL Blitz (13.10.2024).
Rename to book.txt to use (remove the underscore).

 RukChess 4.0.1 vs other engines:

Lynx 1.8.07.5/10+510 Games
Rudim 1.4 JA8/8+88 Games
Akimbo 1.1.0 JA1/8-68 Games
Pingu 5.0.04.5/7+27 Games
Tucano 126/6+66 Games
Smallbrain 7.0 JA5/6+46 Games
EveAnn 2.24/6+26 Games
Pedone 3.13/6+06 Games
BlackCore 6.02/6-26 Games
Nemorino 6.002/6-26 Games
Counter 5.52/6-26 Games
Patricia 4.0 JA2/6-26 Games
Arasan 25.01.5/6-36 Games
Weiss 2.1 JA1.5/6-36 Games
Obsidian 14.20 SE0.5/6-56 Games
Rems M-0912240.5/5-45 Games
YuliGM STRONG X0/5-55 Games
SF-PRO2 11.12.20240/5-55 Games
Dog 2.5 JA4/4+44 Games
Nectar 0.2.14/4+44 Games
Mayhem 8.54/4+44 Games



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