Princhess 0.22.0 - new version chess engine

Princhess - UCI compatible chess engine written in Rust.

Thanks to the Authors: Princess Lana & Jacob Jackson  Rating Chess Engines Diary CEDR=3186

Princhess 0.22.0 what's new?

 📦 NEW: Hardtanh context architecture for eg- and mg-policy nets

📦 NEW: New nets trained with improved data generation

📦 NEW: Gini-based CPUCT adjustment

📦 NEW: Virtual mean and increased CPUCT jitter

📦 NEW: Scale value by material phase

👌 IMP: Reduce atomic contention and buffer root edge stats in multi-threaded search

👌 IMP: X-FEN castling support (Chess960 FENs)

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Results of princhess-0.22.0 vs princhess-0.21.0 (8+0.08, 1t, 128MB, UHO_Lichess_4852_v1.epd):

Elo: 42.95 +/- 12.39, nElo: 75.46 +/- 21.53

LOS: 100.00 %, DrawRatio: 44.20 %, PairsRatio: 2.40

Games: 1000, Wins: 299, Losses: 176, Draws: 525, Points: 561.5 (56.15 %)

Ptnml(0-2): [8, 74, 221, 181, 16], WL/DD Ratio: 0.64

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 Princhess 0.20 vs other engines:

Admete 1.6.0	4/4	+4	4 Games
Fornax 4.0 JA	4/4	+4	4 Games
Mochi 20250308 JA	4/4	+4	4 Games
Lynx 1.9.0	1.5/4	-1	4 Games
Pawnocchio 1.3.1415	1/4	-2	4 Games
Nalwald ab11891 JA	0.5/4	-3	4 Games
Perseus 1.0	0/4	-4	4 Games
Sting Black Hole 10	2/3	+1	3 Games
Lifish 1.0	1/3	-1	3 Games
Orion 1.0	2/2	+2	2 Games
Casanchess 0.8 JA	2/2	+2	2 Games
The Baron 3.45	2/2	+2	2 Games
Chessatron 1.3.14159	2/2	+2	2 Games
The Flying Dutchman 1.0 JA	2/2	+2	2 Games
Bread 1.3.0 JA	2/2	+2	2 Games
Clozza 1.0 JA	2/2	+2	2 Games
BlueBetaFish dev-b3b8603 JA	2/2	+2	2 Games
Bread Engine 1.3.0	2/2	+2	2 Games
Wahoo 4.0.0	1.5/2	+1	2 Games
Lynx 1.9.1	1/2	+0	2 Games
Anduril	1/2	+0	2 Games

Princhess 0.22.0 download