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Chess engine: Emerald 0.2.0

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Emerald - UCI chess engine
Author: Zhongle Qu

v.0.2.0:
Updates:
Fully refactored search code
Introduced aspiration window
A Stockfish-inspired evaluation function
Test result:

~147 Elo boost compared to previous version
~23 Elo higher than Shallow Blue 2.0.0
Both tested under 10s+0.1s time control.


Emerald 0.1.1 vs other engines:
Jomfish 4.02/2+22 Games
Reggz 0.6.01/2+02 Games
Motsog 221/2+02 Games
Rustic Alpha 3.0.50/2-22 Games
Sentinel 2.00/2-22 Games
SF PB 1302250/2-22 Games
Sloth 2.0 JA0/2-22 Games
Stockfish dev-202502130/2-22 Games
Stro4k 3.0 JA0/2-22 Games
Thrawn 2.1 JA0/2-22 Games
Topple 0.8.1 JA0/2-22 Games
Roc2 2.0.40/2-22 Games
Yakka 1.20/2-22 Games
YuliGM 190/2-22 Games
CorChess 202502200/2-22 Games
Eidolon 0.1.00/2-22 Games
Frolic 2.50/2-22 Games
Integral 7.0.0 JA0/2-22 Games
Renegade 1.1.9 JA0/2-22 Games
JudaS ++ 1.020/2-22 Games
Kopyto 5df55e10/2-22 Games



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