Knight_tour_stage2

# Write your code here


def check_dimension(_str):
    try:
        c, r = list(map(int, _str.split(' ')))
    except ValueError:
        return False  # checks if there are too many given values and value error
    if any([r < 1, c < 1]):
        return False
    return [c, r]


def check_position(_str, c, r):
    try:
        c_pos, r_pos = list(map(int, _str.split(' ')))
    except ValueError:
        return False
    if any([c_pos > c, r_pos > r]):
        # print(c, r, c_pos, r_pos)
        return False
    return [c_pos, r_pos]


def print_board(c, r):
    global matrix
    for x in range(matrix[1]):
        print('---', end='')
    # print(' -------------------')
    print()

    '''
    for y in range(r):
        mat[y][0] = r - y
        mat[y][1] = '|'
        mat[y][c - 1] = '|'
    '''
    # mat[8 - n][m - 1] = 'X'
    for i in range(r):
        print(f'{matrix[1] - i}|', end='')
        for j in range(c):
            print(mat[i][j], end=" ")
        print('|')
    for a in range(matrix[0]):
        print('---',end='')
    # print(' ---------------------')
    print()
    for n in range(matrix[0]):
        print(f' {n + 1}', end='')


def move_knight(c, r):
    global mat
    global matrix
    mat[matrix[1] - r][c - 1] = 'X'
    # column is mat[?][c]
    # row is mat[r][?]


while True:
    matrix = check_dimension(input("Enter your board dimensions: "))
    # matrix and position are lists of numbers
    if matrix:
        position = check_position(input("Enter the knight's starting position: "), matrix[0], matrix[1])
        if position:
            break
        else:
            print('Invalid position!')
    else:
        print('Invalid dimensions!')
mat = [['_' for x in range(matrix[0])] for y in range(matrix[1])]
move_knight(position[0], position[1])
print_board(matrix[0], matrix[1])