Solving competition

White to move and mate in 2.
In this puzzle by Yochanan Afek the only correct solution is 1. Qh6! and next White's move leads to an inevitable mate.
The winner of 3rd day's competition, Luboš Drahotský, will be contacted by the festival team regarding collection of their well-deserved prize book Practical Chess Beauty by Yochanan Afek.