Chess engine: Eggnog 6 dev-1cc JA (Windows and Linux)

Eggnog - UCI chess engine, Author: Levi Gibson

Rating Chess Engines Diary CEDR=2650

 NNUE

eggnog-chess-engine uses a strage but functional type of NNUE.

As of May 11, 2025, eggnog-chess-engine is using a small network with a split accumulator. Instead of using HalfKp, the network feeds the positions of the pieces into the network as a sparse array with a size of 784 (12*64). This is then duplicated for the black perspective and fed through the accumulator (128 neurons per side). The two accumulators are then combined into 1 layer with the size of 256, and then it's a simple 16x1 to finish.

Jim Ablett compiles:

Eggnog 6 dev-1cc JA download

Eggnog 5.0 vs other engines:

RapChess 2022-10-17	4/4	+4	4 Games
BlackCore 2.0	0/4	-4	4 Games
Lynx 0.12.0	2/2	+2	2 Games
Fatalii 0.3.1	2/2	+2	2 Games
QuintBot 1.0.0	1.5/2	+1	2 Games
Altair 1.0.0	1/2	+0	2 Games
Jackychess 0.13.1	0.5/2	-1	2 Games
Trinket 3.0.0	0.5/2	-1	2 Games
Seer 2.6.0	0/2	-2	2 Games
Francesca 0.32	0/2	-2	2 Games
Prophet 4.3	0/2	-2	2 Games
AI 27.0	0/2	-2	2 Games
Caissa 1.1	0/2	-2	2 Games
Deep Shredder 13	0/2	-2	2 Games
Eman 8.40	0/2	-2	2 Games
Marvin 6.1.0	0/2	-2	2 Games
YuliGM PrO 4.0	0/2	-2	2 Games
Fire-zero 1072022	0/2	-2	2 Games
Vafra 12.2 Cfish	0/2	-2	2 Games
Viridithas 3.0.0	0/2	-2	2 Games
ShashChess 25.1	0/2	-2	2 Games