Commend, feenschach, 1983
Mate in 2
In Madrasi pieces (except kings) of the same type and opposite colour are paralysed when they attack each other, and cannot move, capture or give check, though they retain the power to paralyse. Here White cannot exploit the paralysis of the black rook to mate immediately by 1.Sd8 or 1.d8S, as Black would reply with a knight move to b7 or c6. The problem neatly combines two themes.
1.Sh6 threatens 2.Qf5, but as the e8 rook is paralysed Black can defend by moving the bishop from e7, though 1...Bd8 is illegal as the white rook would then be giving check. Any promotion at d8 will free the e8 rook. A random move, say 1...Bf8, allows 2.d8S, with an essential double check. There are three corrections. 1...Bf6+ is met by 2.d8B, paralysing the bishop. 1...Bg5 cuts the queen guard of d5 but paralyses the bishop, forcing 2.d8Q (not 2.d8R, as this rook is paralysed and not guarding d5). 1...Bb4 frees the b8 rook (2.d8S? Rxd8!) but again paralyses the bishop. White must mate by 2.d8R simply to avoid 2...Rxd8. A fine combination of Allumwandlung and black correction.