这是一个代码，用于确保棋子的数量在每个棋子的最大限制内

Question

为什么此代码 return 值为 false？它应该 return false 仅当其中一件超过它的最大总数或者如果国王件丢失，最后的循环打印每件的总和并且其中 none 超过了最大限制.但出于某种原因，它仍然 return 是错误的.....

    chessboard = {
        '1h': 'bking',
        '6c': 'wqueen',
        '2g': 'bbishop',
        '5h': 'bqueen',
        '3e': 'wking',
        '4c': 'brook',
    }
    
    
    def check_validity(board):
    
        if sum(value == 'wpawn' or value == 'bpawn' for value in board.values()) > 8:
            return False
        elif sum(value == 'wknight' or value == 'bknight' or value == 'bbishop' or value == 'wbishop' or value == 'wrook' or value == 'brook' for value in board.values()) > 2:
            return False
        elif sum(value == 'wqueen' or value == 'bqueen' for value in board.values()) > 1:
            return False
        elif sum(value == 'wking' or value == 'bking' for value in board.values()) != 1:
            return False
        elif sum(value == b or value == w for value in board.values[0]) > 16:
            return False
        else:
            return True
    
    
    print(check_validity(chessboard))
    for key, values in chessboard.items():
        print(values, sum(value == values for value in chessboard.values()))

输出：

False
bking 1
wqueen 1
bbishop 1
bqueen 1
wking 1
brook 1

Answer 1

你的每个总和计算几种类型的棋子，然后看看计数是否高于这些棋子中每个棋子的最大值。在您的示例中，国王的总和为 return 2，高于 1，因此该函数将为 return false。试试这个：

def check_validity(board):
    pieces = ['wpawn', 'bpawn', 'wknight', 'bknight', 'bbishop', 'wbishop', 'wrook', 'brook', 'wqueen', 'bqueen', 'wking', 'bking']
    max_pieces = [8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1]
    for piece in zip(pieces, max_pieces):
        if sum(value == piece[0] for value in board.values()) > piece[1]:
            return False
    return True

这是一个代码，用于确保棋子的数量在每个棋子的最大限制内

This is a code to make sure the number of chess pieces is within the max limit for each piece

python

boolean

chess