Greg Strong wrote on Tue, Mar 24, 2020 10:20 PM UTC:
Other questions:
Say white moves a bishop. Now black's joker could move like a bishop - but instead black moves a rook. Now its white's move and he wants to castle, but he cannot castle if in check. To decide if he is in check, does black's joker still attack like a bishop, or does it attack like a rook? Or neither?
Argument for attacking like a bishop: white's joker immitates black's last move and black's bishop immitates white's last move. Black moving only changes the move of white's joker.
Argument for attacking like a rook: any move changes the move of both jokers. This is the easiest to program but I don't like it.
Argument for neither: white's joker moves like black's last move only when white is on the move. After white moves, his joker has no attack power until black moves again.
It is also important to determine exactly when the change happens. Say white wants to make a normal king move and black's joker still attacks as a bishop. Does this mean that the white king cannot move onto the bishop's diagonal because that is moving into check? Or has the fact that, as soon as white moves his king the black joker moves as a king, mean that the white king is not in check?
Other questions:
Say white moves a bishop. Now black's joker could move like a bishop - but instead black moves a rook. Now its white's move and he wants to castle, but he cannot castle if in check. To decide if he is in check, does black's joker still attack like a bishop, or does it attack like a rook? Or neither?
Argument for attacking like a bishop: white's joker immitates black's last move and black's bishop immitates white's last move. Black moving only changes the move of white's joker.
Argument for attacking like a rook: any move changes the move of both jokers. This is the easiest to program but I don't like it.
Argument for neither: white's joker moves like black's last move only when white is on the move. After white moves, his joker has no attack power until black moves again.
It is also important to determine exactly when the change happens. Say white wants to make a normal king move and black's joker still attacks as a bishop. Does this mean that the white king cannot move onto the bishop's diagonal because that is moving into check? Or has the fact that, as soon as white moves his king the black joker moves as a king, mean that the white king is not in check?