Chess engine: Pawn 3.0 Dev.f3e1fa8 JA (Windows, Android and Linux)

Pawn - UCI alpha-beta chess engine, largely inspired by Stockfish.
Author: Rui Coelho.  Rating Chess Engines Diary CEDR=3487

v.4.0:

The majority of the strength gains in this release are related to the improved NNUE, which results from refining the training procedure and the dataset generation strategy. Some minor search tweaks have also been explored.

The training data used for training is now freely available at HuggingFace. As usual, all data generation and training have been done with the tools in the branch data_gen, and the provided datasets are stored using pawn's data format (source).

Git tags are now used to describe development builds (via the git describe command), and many tests have been added to run pawn under different compiler sanitisers and Valgrind. The threading model has also been refactored to ease concurrent data generation for the NNUE.

In self-play at LTC conditions, the new version is roughly 40 Elo stronger and wins 4.6 more game pairs on average than it loses.

LTC vs pawn 3.0:

Games: 2000/2000 Elo diff: 43.48 [37.10, 49.89] (95%)

W: 336 L: 87 D: 1577 Draw ratio: 78.8%

Pntl: [0, 61, 645, 278, 16]

No functional change

Pawn 3.0 dev.61f5 86e JA vs other engines:

Wasp 7.00	6/10	+2	10 Partii
Altair 7.1.5 JA	5/10	+0	10 Partii
Tenax 1.0	4.5/10	-1	10 Partii
Minic 3.41	5/8	+2	8 Partii
Slowchess 2.9	4.5/8	+1	8 Partii
Willow 4.0	4/8	+0	8 Partii
Arasan 24.2.2	4/8	+0	8 Partii
Dragon free	4/8	+0	8 Partii
Igel 3.5.5 JA	3.5/8	-1	8 Partii
Superultra 2.0	3.5/8	-1	8 Partii
Peacekeeper 3.01	3/8	-2	8 Partii
Booot 7.3	3/8	-2	8 Partii
Winter 4.0 JA	4/6	+2	6 Partii
Cheng4 0.48	3.5/6	+1	6 Partii
Carp 3.0.1	3.5/6	+1	6 Partii
Komodo 14.1	3.5/6	+1	6 Partii
Rice 8.0.0	3.5/6	+1	6 Partii
SF-PRO 18.09.2024	2/6	-2	6 Partii
ShashChess 36	0.5/6	-5	6 Partii
Tucano 12	4/4	+4	4 Partii
Marvin 6.3.0	2.5/4	+1	4 Partii

Pawn 4.0 download

github:https://github.com/ruicoelhopedro/pawn/releases/