The minor piece ending, in which Black's knight outplays White's bishop, is one that can arise from the Philidor Counter Gambit, which is basically the Latvian Gambit deferred.
Round Four: Latvian Gambit
Yuxing Jack Yang (USCF 1818) - Steve Ferrero (USCF 1878), NJ Open Under-1900 8/31/2008
1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.Nc4 fxe4 5.Nc3 Qg6 6.Ne3 Nf6 7.d3 Bb4 8.Bd2 Bxc3 9.Bxc3 O-O 10.Qd2 Ng4 11.Nxg4 Qxg4 12.dxe4 Qxe4+ 13.Qe2 Re8 14.Qxe4 Rxe4+ 15.Be2 d5
16.f3 Re8 17.Rd1 c6 18.Kf2 Bf5 19.Bd3 Bxd3 20.Rxd3 Nd7 21.Re1 Rxe1 22.Kxe1 Re8+ 23.Kf2 Kf7 24.Re3 Rxe3 25.Kxe3 c5 26.Kf4 d4 27.Be1 Ke6
28.Ke4 Nf6+ 29.Kd3 Kd5 30.Bg3 c4+ 31.Kd2 b5 32.Bb8 a6 33.Ke2 Nd7 34.Bf4 Nc5 35.h4 Na4 36.Bc1 h5 37.g4 g6 38.Kf2 Nc5 39.Bh6 d3 40.Ke3 dxc2 41.Kd2 Nd3 42.Kxc2 Ne1+, White resigns.
