.chess-board {
    border-spacing: 0;
    border-collapse: collapse;
    cursor: pointer;
}

.chess-board td:first-child {
    border-left: 1px solid #000;
}

.chess-board td:last-child {
    border-right: 1px solid #000;
}

.chess-board tr:first-child td {
    border-top: 1px solid #000;
}

.chess-board tr:last-child td {
    border-bottom: 1px solid #000;
}

.chess-board td {
    font-family: "Times New Roman", Times, serif;
    font-size: 22px;
    min-width: 2em;
    padding-top: 6.25%;
    padding-bottom:6.25%;
    width: 2em;
    line-height: 0;
    text-align: center;
    vertical-align: center;
    user-select: none;
}

.chess-board .light {
    background: #eee;
}

.chess-board .dark {
    background: #aaa;
}