Mate in 3 from my own game

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Avatar of shadowtanuki

There are 2 moves for white that force mate in 3. Both moves only leave 2 options for black. Can you work out all the variations?

Avatar of SacrifycedStoat
Rg4+ Kc3 Rb3#

That’s mate in 2, no variations
Avatar of SacrifycedStoat
My bad, that doesn’t work. I forgot about that pawn