The Retrograde Analysis Corner
No. 83, July 1996 - SOLUTIONS
6771 - Henrik Juel
a) -1. Rb6-b5, and after every uncapture, white has 1. Rh6#
b) -1. Rf5-b5, and after every uncapture, white has 1. Rf8#
c) -1. Rg5-b5, and after every uncapture (uncapturing nothing
isn't allowed, due to retrostalemate), white has 1. Rg8#
d) -1. Rh5-b5, and after uncapturing a queen or a rook, white
has 1. Ng5# (duals after the other 3 legal black decisions)
e) -1. d7-d8=R, and white has 1. Rh5# (-1.e7xd8=R fails because
black decides white uncaptured a knight)