def place(stone)
      x, y = stone.to_coord

      internal_board[y][x] = stone
    end
def place(stone)
      x, y = stone.to_coord

      internal_board[y][x] = stone
    end
def place ( stone ) x , y = stone . to_coord internal_board [ y ] [ x ] = stone end
Board shouldn't care about game rules
Board shouldn t care about game rules