source: java/ecj/games/scenarios/SimpleTwoPlayersGameScenario.java

package games.scenarios;

import games.BoardGame;
import games.GameMove;
import games.Player;

import java.util.List;

public class SimpleTwoPlayersGameScenario implements GameScenario {

        private Player[] players;

        public SimpleTwoPlayersGameScenario(Player[] players) {
                this.players = players;
        }

        public int play(BoardGame game) {
                while (!game.endOfGame()) {
                        List<? extends GameMove> moves = game.findMoves();
                        if (!moves.isEmpty()) {
                                GameMove bestMove = null;
                                double bestEval = Double.NEGATIVE_INFINITY;
                                for (GameMove move : moves) {
                                        double eval = game.evalMove(players[game.getCurrentPlayer()], move);
                                        if (eval > bestEval) {
                                                bestEval = eval;
                                                bestMove = move;
                                        }
                                }
                                game.makeMove(bestMove);
                        }
                        game.switchPlayer();
                }
                return game.getOutcome();
        }
}