Ch5P1_ChessDictionaryValidator.py

##In this chapter, we used the dictionary value
##{'1h': 'bking', '6c': 'wqueen',
## '2g': 'bbishop', '5h':'bqueen',
##'3e': 'wking'} to represent a chess board.

##Write a function named isValidChessBoard() that takes a dictionary argument
##and returns True or False depending on if the board is valid.
##
##A valid board will have exactly one black king and exactly one white king.
##Each player can only have at most 16 pieces, at most 8 pawns, and all pieces
##must be on a valid space from '1a' to '8h'; that is, a piece can’t be on
##space '9z'. The piece names begin with either a 'w' or 'b' to represent
##white or black, followed by 'pawn', 'knight', 'bishop', 'rook', 'queen',
##or 'king'. This function should detect when a bug has resulted in an
##improper chess
##board.

def isValidChessBoard(board):

    emptyboard = {'1a' : '', '1b' : '', '1c' : '', '1d' : '', '1e' : '', '1f' : '', '1g' : '', '1h': '', \
    '2a' : '', '2b' : '', '2c' : '', '2d' : '', '2e' : '', '2f' : '', '2g' : '', '2h': '', \
    '3a' : '', '3b' : '', '3c' : '', '3d' : '', '3e' : '', '3f' : '', '3g' : '', '3h': '', \
    '4a' : '', '4b' : '', '4c' : '', '4d' : '', '4e' : '', '4f' : '', '4g' : '', '4h': '', \
    '5a' : '', '5b' : '', '5c' : '', '5d' : '', '5e' : '', '5f' : '', '5g' : '', '5h': '', \
    '6a' : '', '6b' : '', '6c' : '', '6d' : '', '6e' : '', '6f' : '', '6g' : '', '6h': '', \
    '7a' : '', '7b' : '', '7c' : '', '7d' : '', '7e' : '', '7f' : '', '7g' : '', '7h': '', \
    '8a' : '', '8b' : '', '8c' : '', '8d' : '', '8e' : '', '8f' : '', '8g' : '', '8h': ''}

    pieces = {'bking': 1, 'wking': 1, 'bpawn': 8,'wpawn': 8,'bknight': 2, 'bbishop': 2,
                'brook': 2,'wknight': 2, 'wbishop': 2, 'wrook': 2, 'wqueen': 1, 'bqueen': 1}

    board_list=list(board.values())
    #print(board_list)
    for j in board_list:
        if j not in pieces:
            print('Error: ' + str(j) + ' is not a valid piece')

    for i in pieces:
            countpiece = board_list.count(i)
            #print(i)
            #print(countpiece)
            if countpiece > pieces[i]:
                print ('Error: You have too many pieces! Please check your ' + i)

    for k in board.keys():
        #print(k)
        if k not in emptyboard.keys():
            print('Error: ' + k + ' is not a valid location')
    
                    
board = {'1h': 'bking', '6c': 'wqueen', '2g': 'bbishop', '5h': 'bqueen',
        '3e': 'wking', '3f': 'wking', '3g': 'tking', '99g': 'pking'}


isValidChessBoard(board)