Why is the queen move the only correct one sence there are 4 other correct ones.
There are four possible solutions. You should cover the other three that you missed.
I've found seven possible solutions so far:
1. Qh4
2. Qg4
3. Rg4
4. Ra5
5. Qh8+
6. Qd1+
7. Rb5
Although, admittedly, the first three are pretty much the same . . .
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