Solution
1… Nh4+ forks the white king and queen, but 2. gxh4 clears the g-file and allows Rg8+, winning the white queen in any case, ie. 2… Rg8+ 3. Kf1 Qxf3
1… Nh4+ forks the white king and queen, but 2. gxh4 clears the g-file and allows Rg8+, winning the white queen in any case, ie. 2… Rg8+ 3. Kf1 Qxf3