img.board-cell {
  width: 20px;
  height: 20px;
  text-align:center;
  vertical-align:middle;
}
button.board-cell{
  width: 22px;
  height: 22px;
  text-align:center;
  vertical-align:middle;
}
table.board{
  padding: 0px;
  margin: 0px;
  border: 0px;
}
td.board-cell{
  width: 20px;
}
tr.board-row{
  height: 20px;
}
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