
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
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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