private int validMove(int x, int y)
  {
    if ((x >= 0) && (x < 10) && (y >= 0) && (y < 10))
    {
      if (this.playerIntBoard[x][y] > -2)
        return 1;
    }
    else if ((x < 0) || (x >= 10) || (y < 0) || (y >= 10)) {
      return -5;
    }

    return this.playerIntBoard[x][y];
  }