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Deft Reversi

Deft Reversi is a strong Othello program. It consists of the following two parts:

  • Deft Reversi Web

    This is the implementation of the Othello UI part.

  • Deft Reversi Engine

    This is the AI part of the Othello program.

Deft Reversi Web

  • Playing with AI

    Deft Reversi Web

  • About the Levels

    There are levels from 0 to 22. Level 0 plays randomly. It is thought that most people cannot win even around level 3. Levels above 20 are not recommended because they are heavy.

  • Build

    • Rust and wasm-pack are required.

      git clone https://github.com/ikepggthb/deft-reversi.git
      cd deft_reversi/deft-reversi-web
      wasm-pack build --target web
      

Deft Reversi Engine

  • Features
    • bitboard
    • negascout search (PVS)
    • Transposition table
    • Multi Prob Cut
    • Move ordering
      • Shallow searches using evaluation functions for move ordering
      • Speed priority search
        • Searching from moves that limit the opponent's legal moves
        • Used in the endgame
      • Iterative deepening
        • Storing best move in the transposition table for use in the next search
    • Evaluation function using machine learning (linear regression)
      • Used board patterns and the difference in the number of legal moves as features.

License

MIT License.