Emerald - UCI chess engine
Author: Zhongle Qu
Emerald 0.3.0 - what's new?
Updates:
Static Exchange Evaluation (SEE) implemented
Late Move Reduction (LMR)
SEE pruning
Tuned evaluation and other constants
Performance:
~200 Elo improvement compared to version 0.2.0 (Time control 10+0.1)
Note: The binary build requires AVX2 instruction support from CPU. This normally should not cause an issue.
Emerald 0.2.0 vs other engines:
| Critter 1.6a | 0/6 | -6 | 6 Games |
| Tortoise 1.0 | 4/4 | +4 | 4 Games |
| Gravy 1.0 JA | 4/4 | +4 | 4 Games |
| Schneckbert 3.0 JA | 1/4 | -2 | 4 Games |
| Byte Knight 2.0.0 JA | 0.5/4 | -3 | 4 Games |
| Lynx 1.9.1 | 0/4 | -4 | 4 Games |
| EveAnn 3.0 | 0/4 | -4 | 4 Games |
| Lambergar 1.1 | 0/4 | -4 | 4 Games |
| Nalwald ab11891 JA | 0/4 | -4 | 4 Games |
| Pawnocchio 1.4.1 | 0/4 | -4 | 4 Games |
| MadChess 3.3 | 0/4 | -4 | 4 Games |
| Cadie 2.1 JA | 0/4 | -4 | 4 Games |
| Astra 5.1 JA | 0/4 | -4 | 4 Games |
| Dumb 2.3 | 0/4 | -4 | 4 Games |
| Colossus 2025a | 0/4 | -4 | 4 Games |
| CarrotzDestroyerTortoise | 2/2 | +2 | 2 Games |
| Obsidian 15.12 | 0/2 | -2 | 2 Games |
| Starzix 6.1 | 0/2 | -2 | 2 Games |
| Kingfisher Dev.bb31a9a JA | 0/2 | -2 | 2 Games |
| Protej 20250308a | 0/2 | -2 | 2 Games |
| Leorik 3.1 | 0/2 | -2 | 2 Games |
Windows/Linux & Android profiled builds - Jim Ablett compiles:
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