def attempt_to_plot_value(board_, i, j):
    cell_values = get_cell_values(board_, get_cell_row(i), get_cell_column(j))
    seen_numbers = []
    possible_numbers = []

# Looks for numbers that are set horizontally

    for x in range(0, 6):
        current_cell = board_[i][x]
        if current_cell != 0:
            seen_numbers.append(current_cell)

# Looks for numbers that are set vertical

    for y in range(0, 6):
        current_cell = board_[y][j]
        if current_cell != 0:
            seen_numbers.append(current_cell)

# For all numbers 1-6, if the number does not exist horizontally or vertically,
# and the current grid does not contain the value, add the number as a possible candidate

    for z in range(1, 7):
        if z not in seen_numbers and z not in cell_values:
            possible_numbers.append(z)

# if it's just a candidate, "assign" the number to the cell

    if len(possible_numbers) == 1:
        board_[i][j] = possible_numbers[0]
    return