style.css

td {
  border: 1px solid gray;
  height: 50px;
  width: 50px;
}

.black {
  background: black;
}

.sasca-alba, .sasca-neagra {
	display: block;
	height: 40px;
	width: 40px;
	margin: 4px;
	border-radius: 50%;
}

.sasca-alba {
	background: white;
	border: 1px solid black;
}
.sasca-neagra {
	background: black;
	border: 1px solid white;
}
.focus {
    box-shadow: inset 0 0 10px #0f0, 0 0 5px #f00;
}

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