Belette 3.0.0

Changes

• UCI Threads option
• Null move pruning (NMP)
• Reverse futility pruning (RFP)
• Internal iterative reduction (IIR)
• Late move reduction (LMR)
• Late move pruning (LMP)
• SEE pruning in main search
• Butterfly history heuristic

Full Changelog: v2.0.0...v3.0.0

Belette 2.0.0

Changes

• Aspiration window
• Transpositation Table
• Check extension
• SEE Pruning in quiescence
• Staged move generation (good captures, good quiets, bad captures, bad quiets)
• Move ordering (Hash move, MVV-LVA, Killer moves, Counter move, Threats)

Full Changelog: v1.0.0...v2.0.0

Belette 1.0.0 (BabChess Engine)

Initial Release

Estimated Elo: ~1500

Only support AVX2+BMI2 architecture

Board

• Bitboard
• Zobrist hashing (only for 3-fold repetition detection)
• Fast legal move generation inspired by Gigantua

perft 7, start position, Core i7 12700k

Nodes: 3195901860
NPS: 925007774
Time: 3455ms

Search

• Iterative deepening
• Negamax
• Quiescence

Evaluation

• Tapered
• Material
• PSQT (PeSTO)