Astra 5.1.1 - new version chess engine

Astra is a UCI chess engine written in C++.

Author: Semih Özalp

## Credits

- [Stockfish](https://github.com/official-stockfish/Stockfish)

- [Koivisto](https://github.com/Luecx/Koivisto)

- [Smallbrain](https://github.com/Disservin/Smallbrain)

- [Chess Programming Wiki](https://www.chessprogramming.org/Main_Page)

v.5.1.1:

This release mainly brings a bug fix related to multithreading.

Astra 5.0 vs other engines:

Bitbit 1.3	8/8	+8	8 Games
Deep Blunder 1.2.0 JA	6/6	+6	6 Games
Aramis 1.4.0 JA	6/6	+6	6 Games
Schneckbert 1.0	5.5/6	+5	6 Games
Beef 0.3.6 JA	5.5/6	+5	6 Games
Demolito 2025-01-28	5/6	+4	6 Games
Yukari 2025.02.4 JA	5/6	+4	6 Games
Odonata 1.0 JA	4.5/6	+3	6 Games
Black Cat 2.5 JA	4.5/6	+3	6 Games
Perelandra 2.0	2.5/6	-1	6 Games
Berserk 20250203	1.5/6	-3	6 Games
SF-PRO2 05.02.2025	1/6	-4	6 Games
Colossus 2025a	4/4	+4	4 Games
Fatalii 0.9.0	4/4	+4	4 Games
Mufasa 0.2.1 JA	4/4	+4	4 Games
Trinket 3.5.0 JA	4/4	+4	4 Games
Pioneer 0.3.2 JA	4/4	+4	4 Games
Thrawn 2.1 JA	3.5/4	+3	4 Games
Midnight 9 JA	3/4	+2	4 Games
Peacekeeper 3.01 JA	2/4	+0	4 Games
Alexander 5.0	1.5/4	-1	4 Games

Astra 5.1.1 download