QChess

Simple Alpha Beta UCI Compliant Chess Engine in Python

Currently the strongest Python Chess engine

Running this engine with pypy is heavily recommended

Installation

• cpython: pip3 install -r requirements.txt
• pypy: pypy -m pip install -r requirements.txt

Usage

Load qchess.bat into any UCI compliant Chess program and set the working directory to your cloned repository folder

Todo List

• fully documented
• UCI compliant
  • plays on time
• board evaluation
  • piece specific positions
  • game phase tapering
  • mobility
  • will to push
  • pawn structure
    • isolated pawns
    • doubled/tripled pawns
    • passed pawns
    • pawn chains
  • doubled bishops
  • material value
• minimax search
• quiescence search
  • delta pruning
• iterative deepening
• transposition tables
• pruning
  • alpha beta pruning
    • move ordering
      • MVV LVA
      • positional changes
      • best move from transposition table
      • retake last moved
      • killer move heuristic
      • countermove heuristic
      • history heuristic
      • static exchange evaluation
  • aspiration windows with gamma
  • null window
  • futility pruning
  • reverse futility pruning
  • principal variance search
  • late move reductions
  • null move reduction
  • scout search or MTD(f)
  • razoring
• parallel processing
• selective searching