.mainBoard {
    display: grid;
    grid-gap: 0;
    grid-template-columns: 100px 100px 100px 100px 100px 100px 100px 100px;
    width: 800px;
    height: 800px;
    margin: 50px;
    border: 1px solid black;
    text-align: center;
}

.blackTile {
    background-color: black;
    color: white;
    margin: 0;
    width: 100px;
    height: 100px;
}

.whiteTile {
    background-color: white;
    color: black;
    margin: 0;
    width: 100px;
    height: 100px;
}