thaw-reversi-engine.ts/lib/game.js

A Node.js Reversi (Othello) game engine with alpha-beta pruning and a heuristic, packaged for npm.

// github:tom-weatherhead/thaw-reversi-engine.ts/src/game.ts
import { Board, boardArea } from './board';
import { Player } from './player';
import { PlayerColour } from './player-colour';
export class Game {
    // TODO: constructor(options = {}) { ... } ?
    constructor(boardString = '') {
        this.victoryScore = boardArea;
        this.whitePlayer = new Player(PlayerColour.White, this, (boardString.match(/X/g) || []).length);
        this.blackPlayer = new Player(PlayerColour.Black, this, (boardString.match(/O/g) || []).length);
        this.whitePlayer.opponent = this.blackPlayer;
        this.blackPlayer.opponent = this.whitePlayer;
        this.board = new Board(this.whitePlayer, this.blackPlayer, boardString);
    }
    noLegalMovesForPlayer(player) {
        const result = player.findBestMove(1);
        // return result.numberOfLegalMoves === 0; // Or:
        return result.bestMoves.length === 0;
    }
    isGameDeadlocked() {
        return (this.noLegalMovesForPlayer(this.whitePlayer) &&
            this.noLegalMovesForPlayer(this.blackPlayer));
    }
    isGameNotOver() {
        return (this.whitePlayer.piecePopulation > 0 &&
            this.blackPlayer.piecePopulation > 0 &&
            this.whitePlayer.piecePopulation +
                this.blackPlayer.piecePopulation <
                boardArea &&
            !this.isGameDeadlocked());
    }
}
Game.initialBoardAsString = Board.createInitialBoardString();