Abdul Jabbar Karwatkar
1st Prize, The Problemist, 1983
Mate in 2
In the popular fairy form Madrasi chess, when a piece is observed by a similar piece of the opposite colour it is paralysed, and can neither move, capture nor check, but may paralyse in turn (so the rooks at g8 and h8 are paralysed, as are the knights at c6 and e5). For an example by Norman Macleod see here (and scroll down). Karwatkar’s problem shows a clear-cut theme.
An excellent thematic key 1.Bf8 paralyses the h6 bishop, threatening 2.Sxg5, and allows four checks. Each defence deprives Black of the possibility of Rxb6, paralysing the b7 rook, and each time White must choose the correct promotion to paralyse the checking piece: 1...Qxb6+ 2.d8Q; 1...Bxb6+ 2.d8B; 1...Rd5+ 2.d8R; 1...Rxe5+ 2.d8S. A lucid Allumwandlung.