Oops. A cannon does not play checks diagonally. Forget adding a check symbol.
Stronger perhaps is adding a check (+) to Black's first, 1.PAb4+, determining position of invisibl wQ on c3 in the…
*to be able to effect
What about this solution?: 1.PAb4 Ib3 2.PAxb2 Ixb2# implying a white Q must have played to b3 yo be able…
Yes, I also agree that the "make" move should follow the moving possibilities of the captured piece at the time…
Solved it. Very nice twin. I, too, agree with transference of BTB powers. I am sure a two-solution setting could…
About castling and the 50-move rule: There was a time when castling would restart the count. Later, the FIDE rules…
Maybe Popeye accepts the null move here, because it involves a capture. To what level does that make a difference?…
Dmitri has given the genuine motivation for the existence of the rule. Unfortunately, the formulation of the rule is not…
Dmitri, maybe you are right, I don't know. But then, any pawn move in Phantom chess has the potential of…