Can anyone please help with the following part rule 4 of my Knight and King Chess Puzzle:

-------------------

Check for side X is a configuration of the board when Xs king can be captured by a piece of the other side Y (in one move). Another chess rule we obey is:

[Rule4] A piece of side X cannot make a move, if the configuration resulting from this move is a check for X.

Checkmate for side X is a configuration of the board when the king of a side X (Black or White) is in check and there is no move available for X to eliminate the check situation.

Stalemate for side X is a configuration of the board when the side X is not in check and there is no move available for X.

Every game results in a win of side X, or a stalemate for side X, or it runs infinitely. Side X wins if the game reaches a configuration which is a checkmate for the opposite side.

-------------------------------------------

code below

def is_check(side: bool, B: Board) -> bool: ''' checks if configuration of B is check for side Hint: use can_reach '''

def is_checkmate(side: bool, B: Board) -> bool: ''' checks if configuration of B is checkmate for side

Hints: - use is_check - use can_reach '''

def is_stalemate(side: bool, B: Board) -> bool: ''' checks if configuration of B is stalemate for side

Hints: - use is_check - use can_move_to '''

def read_board(filename: str) -> Board: ''' reads board configuration from file in current directory in plain format raises IOError exception if file is not valid (see section Plain board configurations) '''

def save_board(filename: str, B: Board) -> None: '''saves board configuration into file in current directory in plain format'''

def find_black_move(B: Board) -> tuple[Piece, int, int]: ''' returns (P, x, y) where a Black piece P can move on B to coordinates x,y according to chess rules assumes there is at least one black piece that can move somewhere

Hints: - use methods of random library - use can_move_to '''

def conf2unicode(B: Board) -> str: '''converts board cofiguration B to unicode format string (see section Unicode board configurations)'''

def main() -> None: ''' runs the play

Hint: implementation of this could start as follows: filename = input("File name for initial configuration: ") ... '''

if __name__ == '__main__': #keep this in main()