public Pair<Point, Point> play(State game) {
    int bestValue = Integer.MIN_VALUE;
    Pair<Point, Point> bestMove = null;
    for(Pair<Point, Point> move : game.getMove(game.getCurrentPlayer())) {
        State nextState = game.play(move);
        complexity++;
        int value = -alphabeta(nextState, this.depth,Integer.MIN_VALUE,Integer.MAX_VALUE);
        if (value > bestValue) {
            bestValue = value;
            bestMove = move;
        }
    }
    return bestMove;
}

    private int alphabeta(State state, int depth,int alpha,int beta) {
    if(depth == 0 || state.isOver()) {
        return evaluate(state);
    } else {
        for (Pair<Point, Point> move : state.getMove(state.getCurrentPlayer())) {
            State nextState = state.play(move);
            alpha = Math.max(alpha,-alphabeta(nextState,depth-1,-beta,-alpha));
            if(alpha >= beta)
                return alpha;
        }
        return alpha;
    }
}