.grid {
    width: 150px;
    height: 150px;
    border: 2px solid black;
    border-collapse: collapse;
}

.grid td {
    border: 2px solid black;
}

.gridoff {
    border: none;
}

.gridoff td {
    border: none;
}

.frame {
    border: 1px solid black;
    display: inline-block;
}

tbody tr:nth-child(even) {
    background-color: rgb(222, 222, 222);
}