I've solved it

Rook to g1
Bishop must take queen else Rook g5#
Bishop takes queen
Bishop d7#

nostr:nevent1qqspwaavx96lx54x2dlv4p3r0qcavlneggyyg2npe50gl3mz39ng8lqppemhxue69uhkummn9ekx7mp0qgsys7ecpmcvp4gjrq0mx8rga2yf5uhyf0f0ep26qt6z6qc3ed80v7crqsqqqqqpp8u524