Chess engine: Emerald 0.2.0

 

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 4.0	2/2	+2	2 Games
Reggz 0.6.0	1/2	+0	2 Games
Motsog 22	1/2	+0	2 Games
Rustic Alpha 3.0.5	0/2	-2	2 Games
Sentinel 2.0	0/2	-2	2 Games
SF PB 130225	0/2	-2	2 Games
Sloth 2.0 JA	0/2	-2	2 Games
Stockfish dev-20250213	0/2	-2	2 Games
Stro4k 3.0 JA	0/2	-2	2 Games
Thrawn 2.1 JA	0/2	-2	2 Games
Topple 0.8.1 JA	0/2	-2	2 Games
Roc2 2.0.4	0/2	-2	2 Games
Yakka 1.2	0/2	-2	2 Games
YuliGM 19	0/2	-2	2 Games
CorChess 20250220	0/2	-2	2 Games
Eidolon 0.1.0	0/2	-2	2 Games
Frolic 2.5	0/2	-2	2 Games
Integral 7.0.0 JA	0/2	-2	2 Games
Renegade 1.1.9 JA	0/2	-2	2 Games
JudaS ++ 1.02	0/2	-2	2 Games
Kopyto 5df55e1	0/2	-2	2 Games

Emerald 0.2.0 download