pawnocchio

UCI Chess engine

Strength

Version	CCRL 40/15
1.3	3200*
1.2	3120
1.1	2432
1.0	2100*

*estimated

Features

Supports FRC, also known as Chess960

Search

The search is a standard alpha-beta search with the following enhancements:

• Iterative deepening
• Quiescence search
• Aspiration windows
• Principal variation search
• Transposition table
  • Move ordering
  • Cutoffs
  • Static evaluation correction
• MVV-LVA ordering of captures
• History Heuristic (standard history and 1 ply conthist)
• Reverse futility pruning
• Null move pruning
• Razoring
• Mate distance pruning
• Singular extensions
  • Double extension
• Killer move
• Correction history

Evaluation

The evaluation is done using a neural net trained entirely on self play games from zero knowledge using the excellent open source bullet neural network trainer. The architecture of the network is (768hm->640)x2->1x8

Build instructions

1. Install zig (0.14.0)
2. zig build --release=fast --prefix <installation path> (for example --prefix ~/.local will put pawnocchio in ~/.local/bin/pawnocchio)