Emerald Chess 0.3.0

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 Chess 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 Chess 0.1.1

Minor updates:

• Show version message in UCI and on start up
• Insignificant time management update
• Provide binary that can run on machines with AVX512 support (skylake)

Emerald Chess 0.1.0

The starting point of Emerald chess engine!

Features:

• Principal Variation Search
• Transposition table (not configurable)
• Quiescence search
• Piece square table, mobility, basic pawn structure knowledge in evaluation
• MVV/LVA and killer heuristic in move ordering
• Iterative deepening

Playing strength: estimated ~1600 Elo