Knur

UCI-compliant chess engine, written from scratch in C.

Strength

knur-v1.0: Around 2416 elo on CCRL.

Features

• Negamax with PVS
• Iterative Deepening
• Quiescence Search
• Transposition Table
• Aspiration Windows
• Move Ordering with Staged Movegen
  • Static Exchange Evaluation
  • Killer Heuristic
  • Countermove Heuristic
  • History Heuristic
  • Internal Iterative Deepening
• Extensions
  • Singular Extensions
• Pruning
  • Mate Distance Pruning
  • Reverse Futility Pruning
  • Null Move Pruning
  • ProbCut
  • Late Move Pruning
  • Multi-Cut
• Reductions
  • Late Move Reductions
• Evaluation
  • NNUE: (768->1536)x2->1x8
  • Tapered Eval
  • Pawn Hash Table

Building

To build Knur run:

git clone https://github.com/Rentib/Knur
cd Knur/src
make

Acknowledgements

• Resources
  • Chess Programming Wiki
• Engines
  • Stockfish
  • Berserk
  • Ethereal
  • Alexandria
• Tools
  • c-chess-cli
  • fastchess
  • bullet
  • CLOP