School_task

def knight_moves(pos):  # the function, that returns available moves for chess knight
    global chess_field
    chess_field = []
    for i in range(8):
        chess_field.append(['o'] * 8)  # creating empty chess field

    moves = []  # creating returning list
    if ord('A') <= ord(pos[0]) <= ord('H'):  # start pos letter is UpperCase
        for i in range(ord('A'), ord('H') + 1):
            for j in range(1, 9):
                if abs(ord(pos[0]) - i) == 2 and abs(int(pos[1]) - j) == 1 or abs(ord(pos[0]) - i) == 1 and abs(
                        int(pos[1]) - j) == 2:
                    moves.append(f'{chr(i)}{j}')  # appending available moves to the returning list
                    chess_field[8 - j][i - ord('A')] = 'M'  # appending available moves to the field
        chess_field[8 - int(pos[1])][ord(pos[0]) - ord('A')] = 'K'  # appending the knight to the field
    else:  # start pos letter is LowerCase
        for i in range(ord('a'), ord('h') + 1):
            for j in range(1, 9):
                if abs(ord(pos[0]) - i) == 2 and abs(int(pos[1]) - j) == 1 or abs(ord(pos[0]) - i) == 1 and abs(
                        int(pos[1]) - j) == 2:
                    moves.append(f'{chr(i)}{j}')  # appending available moves to the returning list
                    chess_field[8 - j][i - ord('a')] = 'M'  # appending available moves to the field
        chess_field[8 - int(pos[1])][ord(pos[0]) - ord('a')] = 'K'  # appending the knight to the field

    return moves


def cool_output():  # the function, that makes a cool output
    for i in range(8):
        print(8 - i, *chess_field[i])
    print('  ', end='')
    for i in range(ord('A'), ord('H') + 1):
        print(chr(i), end=' ')


# <START>
print('Available moves:')
print(*knight_moves('E5'))  # enter the start pos here
print()
print('Look at them on the chess field:')
cool_output()