Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bc4/3...Nf6/4. d4/4...exd4/5. O-O/5...Nxe4/6. Nc3/6...dxc3/7. Bxf7/7...Kxf7/8. Qd5/8...Kf6/9. Re1/9...Ne7/10. Qxe4/10...Kf7/11. Bg5/11...d5/12. Qf4/12...Kg8

= Nakhmanson Gambit, Kf6 Defence, Rook Attack =

12...Kg8
White has to play 13.Qh4 here to guarantee winning the piece back. If White tries 13.bxc3, Black simply steps out of the pin with 13...Qd7.

After 13.Qh4, Black can throw in 13...cxb2 14.Rab1, arriving at the same position as after 11...cxb2 12.Rab1 d5 13.Qf4+ Kg8 14.Qh4, but then comes the  moment of truth: Black has to find 14...Ng6! (or the identical 14...Nf5!) allowing White to take the piece only at the cost of trading queens.

15.Bxd8 Nxh4 16.Bxh4 follows, then there's no point trying to save the pawn with 16...Ba3? due to the rook check on e8, so Black must settle for 16...h5 developing the rook via h6. Black is a healthy pawn up with a safe king and the bishop pair, and should be able to tune into Channel 0-1 from here.