I have not understood how the joker is moving. I understand Option 2 and 3, but what about 1? Let's imagine the Owner moves a Rook, then the opponent moves a Pawn. How is the Joker moving now if it has no moves at all?
Ok, one last try. The question is how a Joker moves when it is not that player's turn. When it is white's turn to move, how does black's joker move? After white moves, of course black's joker moves like whatever piece white moves. But when it is still white's turn, how does black's joker move? Under option 1, it has no moves at all.
This usually makes no difference because black pieces don't move when it is white's turn anyway. The only time it matters is for deciding if the current player is in check.
It is black's turn to move. Is he in check? That depends on how the white joker moves at this moment. Under option 1, the white joker has no moves because it is not his turn. So black is not in check. The game is still over! If black moves, then the white joker will again be able to move like a king and black will be in check. It is not legal to move into check, so black has no legal moves and the game ends. But it ends in stalemate, not checkmate, because he is not in check at this moment. It would be the same outcome if the white joker could move, but was currently emulating a rook.
Ok, one last try. The question is how a Joker moves when it is not that player's turn. When it is white's turn to move, how does black's joker move? After white moves, of course black's joker moves like whatever piece white moves. But when it is still white's turn, how does black's joker move? Under option 1, it has no moves at all.
This usually makes no difference because black pieces don't move when it is white's turn anyway. The only time it matters is for deciding if the current player is in check.
It is black's turn to move. Is he in check? That depends on how the white joker moves at this moment. Under option 1, the white joker has no moves because it is not his turn. So black is not in check. The game is still over! If black moves, then the white joker will again be able to move like a king and black will be in check. It is not legal to move into check, so black has no legal moves and the game ends. But it ends in stalemate, not checkmate, because he is not in check at this moment. It would be the same outcome if the white joker could move, but was currently emulating a rook.