Well, using the zugzwang theme, black has only 3 legal moves if white were to, say, pass (which I know is impossible). Qc4, Qxc3, and d5. The 2 queen moves lose to an instant mate in 1, but d5 doesn't. So I have to make a situation where d5 loses.
Oh! Re3, and if d5, Re6 mate!
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Hello everyone,
Here is my 94th problem. Good luck!:
White mates in 2