.board 
        {
            border-spacing:0; 
            border-width:1em; 
        }

       .board td { font-size:0px;
                    border-width:1px;
                    border-style:solid; }
        
        
        td.digit { font-size:20px;
                  vertical-align:middle; 
                  padding-left:15px; 
                  padding-right:15px;
                  border-style:none;
                  
                }
        
        td.letter { font-size:20px;
		   padding-top:10px;
                   padding-bottom:10px;
                   text-align:center; 
                   border-style:none;
                 }
        a img { border: none; }