.cell {
    margin: 0 5px 5px 0;
    text-align: center;
    padding-top: 10px;
    cursor: pointer;
    border: 3px solid black;
}

.queen {
    background-image: url("queen.jpg");
    background-repeat: no-repeat, repeat;
    background-size: cover;
    background-position: center;
}

.red {
    background-color: darkred;
}