public static void printBoard(int[][] board) {
        System.out.println("-------------");
        for (int[] aBoard : board) {
            System.out.print("|");
            for (int anABoard : aBoard) {
                System.out.print(" ");
                if (anABoard == -1) System.out.print("O");
                if (anABoard == 0) System.out.print(" ");
                if (anABoard == 1) System.out.print("X");
                System.out.print(" |");
            }
            System.out.println();
            System.out.println("-------------");
        }
    }