table {
    border : double 2px black ;
    margin: auto;

}

tr {
    height: 80px;
}
td{
    width: 80px;
    text-align: center;
    font-size: 3em;

}
/* Filas impares columnas pares */

tr:nth-child(odd) td:nth-child(even){
    background-color: black ;
    color: white ;
}

/* Filas pares columnas pares */

tr:nth-child(even) td:nth-child(odd){
    background-color: rgb(0, 0, 0) ;
    color: rgb(0, 0, 0) ;
}