As for a Xiangqi Joker; this doesn't seem decidable by logic. It depends on whether you consider confinement as part of the move rules, or as an independent property of the piece type. Like the Joker would not mimic the royalty either, and can use a King move to step to an attacked square any time it wants. But of course you could make rules that would mimic any properties of the last-moved piece type.
I agree 100%. I was just making the point that the XBetza "I" atom doesn't answer all questions. I think the XBetza page should probably note that different implementations may vary.
I agree 100%. I was just making the point that the XBetza "I" atom doesn't answer all questions. I think the XBetza page should probably note that different implementations may vary.