Down a bishop, rook, and pawn - and I win!
er, you're so right, sonofpearl...18.Qc7 is mate, fr'instance
a useful bit of defensive patterning to fix in one's head is that Na3 (instead of c3 or d2) protects against the K and R fork on c2 (ditto for the analogous positions on the other corners of the board.)
Well done man. However you have to admit you got lucky too. Move 12... Nxe4 was in truth a mistake. One he didn't notice bytheway. If he had played 13. Qxe7+ ; Kc6 (forced) 14..Qxe4 and your position was prety much lost. Or better yet.. after ....Kc6 14 Qe8+ ; Bd7 (forced) 15 Qxa8 taking the other rook. Still this is quite a psychological game, so he probably worried about his own king when he should have finished what he started.
My opponent would have never made that move though. 9. Qg8 is impossibly idiotic. No one moves his queen in the line of fire of two different pieces. I'm not following you.