Chess engine: Leorik 3.1 (for Windows, Linux and Mac)

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Leorik - UCI chess engine
Author-Thomas Jahn Rating Chess Engines Diary CEDR=2998

v.3.1:
Leorik 3.1 uses .Net 9 and has a stronger NNUE evaluation and an improved search.
The NNUE improvements include:

Larger network: Hidden-layer size increased from 256 to 640 neurons.
SCReLU Activation: replaces CReLU for better accuracy.
Trained from scratch: Training data collected from 19 generations of selfplay, starting with a zero-initialized network and high initial temperature.
New Network: 640HL-S-5288M-Tmix-Q5-v19 trained on 5.2 billion positions, gathered across generation 13 through 19.
The Search improvements include:

Correction History: static eval adjusted by search results on positions with similar features. (Compares Pawn, Knight|Bishop and Queen|Rook bitmasks) Wiki
Aggressive Late Move Reduction: Late quiet moves that do not improve the static eval are getting reduced by 4 instead of the usual 2.
Dynamic Late-Move Threshold: The history threshold that identifies quiet moves as 'late' now scales proportionally with the number of played moves.
Reverse-Futility-Pruning: Uses a dynamic margin computed from NMP statistics.

Rating CEDR progres - Leorik 
Demolito 2023-08-202/16-1216 Games
Caissa 1.13.10.5/16-1516 Games
Carp 3.0.10.5/16-1516 Games
Mida 2.18/14+214 Games
Altair 5.0.02/14-1014 Games
Alexandria 5.0.00.5/14-1314 Games
Akimbo 0.6.01/12-1012 Games
Freda 0.9910/10+1010 Games
AbbyStein 1.50.5/10-910 Games
Raid 2.76i_X0/10-1010 Games
Tofiks 1.2.08/8+88 Games
Chers 0.6.18/8+88 Games
Odonata 0.7.06.5/8+58 Games
Hazard 2.060.5/8-78 Games
Stormphrax 2.0.00/8-88 Games
Avalanche 2.0.00/8-88 Games
RofChade 3.10/8-88 Games
Reckless 0.2.06/6+66 Games
Asymptote 0.84/6+26 Games
Princhess 0.13.02.5/6-16 Games
Texel 1.101/6-46 Games


github:https://github.com/lithander/Leorik/releases/

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