(5x5) r7 - 1pPAp3 - pkB5 - N7 - 2K5 - 8 - 8 - 8
Atomic Rocket. The 
can move 1 or 2 squares to any
direction (and can to capture in this range, of course) and can to jump any
adjacent piece. If exist a enemy piece in the
landing square, it will be captured. White mates in 2.
Solution:
1 e7! (am. c5++)
In spite of repeated mates to any black move (
a5 or bc6 or a7),
it only exist by the . If the was
replaced by a 
, then the mates disappears. For example:
a) 1... a5; 2 c5+, b5+ (but 2 c5++)
b) 1... bc6; 2 c5+, c7 (but 2 c5++)
c) 1... a7; 2 c5+, b6 (but 2 c5++)
Try: 1 b7+?, a5!; 2 b5+?,
ab5 (but 2 b4++)