New version chess engine: Lynx 1.8.0 (Windows, MacOS, Linux)

Lynx it's written in C# (.NET 6). UCI protocol is needed.

Chess Engines Diary Rating CEDR=2890

Lynx release artifacts are self-contained and require no dependencies to be run.

However, you can also choose to build Lynx yourself.

Requirements

NET 6 SDK. You can find instructions about how to install it in yo

v.1.8.0

🔍 Search

Improving: LMP (#1129)

Improving: RFP (#1130, #1133)

Improving: LMR (#1135)

NMP, tweak reduction using eval - beta (#1139)

NMP: Use the right score for TT condition (#1268)

LMR: reduce more on cutnode (#1233)

LMR: avoid when being checkmated (#1231)

LMR: increase pv min moves 2 (#1230)

History: History_BestScoreBetaMargin 80 -> 60 (#1118)

History: increase bonus when best score is over beta by some margin (#1110)

History: increase bonus when static eval is lower than alpha (#1123)

Save static eval in TT (#1084, #1085)

Aspiration windows: fail high reduction (#800, #1285)

⌛ Time management

Add node time management (#1203, #1206)

Add best move stability (#1211)

Add score stability (#1223)

Soft limit <= hard limit (#1210)

⚡ Speedups

Move to .NET 9 (#1108)

Don't attempt continuation history on root moves (#1065)

Use Unsafe.Add for PSQT() (#1153)

Make TaperedEvaluationTerm fields constant (#1174)

Make TT (wrapper) a readonly struct (#1200)

Flatten killer moves array (and stack-allocate it) (#1247)

Minimal speedup in go UCI command parsing (#1264)

🐛 Bug fixes

Clear PlyStackEntry shared array on return (#1182)

Don't allow the search to stop if no best move is found (#1251)

IDDFS finishes some depths with no moves (#1266)

Incorrect (too negative) mate scores when being checkmated (#1271)

Make sure staticEval var always gets initialized as part of the search (#1272)

Prevent aspiration windows to go outside of [MinEval, MaxEval] after window overflow (#1275)

Lynx 1.7.0 vs other engines:

Devel 4.0.2.3	2.5/3	+2	3 Games
Shallow 5	2/2	+2	2 Games
CT800 1.46	2/2	+2	2 Games
LazySMP 2.0	2/2	+2	2 Games
Fornax 4.0	2/2	+2	2 Games
Hedgehog 2.407	2/2	+2	2 Games
Snail Chess 1.0.1	2/2	+2	2 Games
Catto 0.12.3	2/2	+2	2 Games
Lozza 3 Dev.874772a JA	1.5/2	+1	2 Games
Princhess 0.19.0	1/2	+0	2 Games
Stockfish 17	0.5/2	-1	2 Games
Expositor 4WR02	0.5/2	-1	2 Games
Vafra 14.12.2 Stockfish	0.5/2	-1	2 Games
Heimdall 1.0.0	0.5/2	-1	2 Games
4ku 5.1	0.5/2	-1	2 Games
Critter 1.6a	0.5/2	-1	2 Games
Pingu 4.0.0	0.5/2	-1	2 Games
Motor 0.7.0	0/2	-2	2 Games
JigSaw 6.0	0/2	-2	2 Games
Lizard 11.0.0	0/2	-2	2 Games
HypnoS 220824bis	0/2	-2	2 Games

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Lynx 1.8.0 download 

github:https://github.com/lynx-chess/Lynx/releases/