/// <summary>
 /// The implementation of the request handler dealing with cells that contain bombs
 /// </summary>
 /// <param name="row">The row of the cell</param>
 /// <param name="col">The column of the cell</param>
 /// <param name="board">The current playing board</param>
 public override void HandleRequest(int row, int col, IBoard board)
 {
     if (board.IsBomb(row, col))
     {
         board.ChangeBoardState(new Notification(GlobalMessages.GameOver, BoardState.Closed));
     }
     else if (this.Successor != null)
     {
         this.Successor.HandleRequest(row, col, board);
     }
 }