Using the warning sign as the dummy fill in character, it seems to be the biggest one among displayed characters
1.1 --- a/minesweeper/src/main/webapp/pages/mines.css Sat Jul 26 08:28:59 2014 +0200
1.2 +++ b/minesweeper/src/main/webapp/pages/mines.css Sat Jul 26 08:53:29 2014 +0200
1.3 @@ -105,7 +105,7 @@
1.4 }
1.5
1.6 table.PLAYING td.UNKNOWN div::after {
1.7 - content: "\002780";
1.8 + content: "\0026a0";
1.9 }
1.10 table.field td.EXPLOSION div::after {
1.11 content: "\002717";
1.12 @@ -117,7 +117,7 @@
1.13 content: "\0026a0";
1.14 }
1.15 table.field td.N_0 div::after {
1.16 - content: "\002780";
1.17 + content: "\0026a0";
1.18 background-color: white;
1.19 color: white;
1.20 }