#board {
  display: grid;
  border: 1px solid lightgray;
  grid-template-columns: repeat(3, 130px);
  grid-gap: 0;

  div {
    height: 130px;
    width: 130px;
    box-sizing: border-box;
  }

  div.goal_white {
    border: 6px solid white;
  }

  div.goal_black {
    border: 6px solid black;
  }

  div:nth-child(odd) {
    background-color: moccasin;
  }

  div:nth-child(even) {
    background-color: darkseagreen;
  }
}