Originally posted by BigDoggProblema) white to move
H. Albertz and K. Henke
Die Schwalbe 1948
[fen]4k2r/8/8/8/2Q4p/8/8/4K2R[/fen]
Helpmate in 2
One solution with White to play, One solution with Black to play
(Helpmate: Both sides move collaboratively to checkmate black in the required number of moves)
Qxh4 0-0
Qh7#
b) black to move
... Rh7
0-0 Re7
Qc8#