I thought this was the perfect follow-up to the win I posted. I thought playing a3 before c4 would be a finess, and it was- for my opponent. The combination of ...f5 and the coming ...Bc5 is devastating, and since I know from experience that my opponent was more than equal to the task when it comes to converting the advantage, I saved us both time and threw in the towel.
Well after Bxd6 white can play Nxd6 but its horrible. I looked at Nf2 instead of d6 where I think black wins the exchange for a pawn. Not immediately resignable but also horrible and I suspect the OP wanted to focus energies elsewhere ?