Chess engines: Devre 6.39 dev.e4d35c6 JA (Windows and Linux)

UCI chess engines: Devre

Author: Ömer Faruk Tutkun  Rating Chess Engines Diary CEDR=3386

Devre is an open-source UCI compatible chess engine written in C as a hobby project.The code is a bit badly written now but I'll try to make it cleaner and more efficent in my free time. Although Devre is an original chess engine written from scratch, I got great help from chessprogramming wiki , talkchess forum,stcokfish discord ,and some open-source C engines: Ethereal, Vice, CPW.

Devre 6.0.0 results:

Opponent	Score	+-	Games
Critter 1.6a	9.5/12	+7	12 Games
Lynx 1.6.0	10/10	+10	10 Games
Euwe 1.0	10/10	+10	10 Games
Mida 2.3.1 JA	9.5/10	+9	10 Games
Spaghet BologNNese 1.0	4.5/10	-1	10 Games
Uralochka 3.41a JA	3.5/10	-3	10 Games
Nectar 0.1.2	9/9	+9	9 Games
Radiance 3.2	9/9	+9	9 Games
Caissa 1.20	1.5/9	-6	9 Games
DeepBlunder 1.1.9	8/8	+8	8 Games
CorChess 20240804	1.5/7	-4	7 Games
HypnoS 030824	1.5/6	-3	6 Games
Obsidian 13.0	1/6	-4	6 Games
SF-PRO 05.08.2024	1/6	-4	6 Games
Stockfish 16.1	0.5/6	-5	6 Games
Motor 0.7.0	1/5	-3	5 Games
Kuma 1.2	4/4	+4	4 Games
Toga IV 1.1 JA	4/4	+4	4 Games
Stash 35.26 JA	3.5/4	+3	4 Games
LTChess 9.3	3.5/4	+3	4 Games
Gogobello 3.0	3.5/4	+3	4 Games

v.6.0

Changes:

Correction History is added.

NNUE arch, data, and training process have changed. The new arch is (768->1536)x2->1 with SCRelu as an activation function.

A few bug fixes were made one of them was the problem of devre 5.0 poor ltc performance.

TT replacement scheme changed

Some improvements in the search.

Elo gain

Elo   | 162.22 +- 9.64 (95%)

Conf  | 40.0+0.40s Threads=1 Hash=16MB

Games | N: 2006 W: 1023 L: 149 D: 834

Penta | [3, 24, 241, 566, 169]

Thanks to the testers who tested Devre, and the chess engine developers that helped me while developing my engine.

Jim Ablett compiles:

Devre 6.39 dev.e4d35c6 JA download

Github-https://github.com/OmerFarukTutkun/Devre/releases/

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