Intuitive piece sacrifice

In the following game I played one of my most adventurous piece sacrifice ever.

Jyrki Heikkinen – Rebel Decade, London 1996

1.d4 Nf6 2.f3 d5 3.e4 dxe4 4.c4 e6 5.Nc3

This is one way to transpose to the DDG 1.d4 d5 2.c4 e6 3.c4 dxe4 4.Nc3 Nf6 5.f3.

5...c5 6.d5 exd5 7.cxd5 exf3 8.Nxf3 Bd6 9.Bb5+ Nbd7 10.O-O O-O 11.Bg5 h6 12.Bh4 Re8 13.Nd2!? g5 14.Nc4 Bf8

15.Qf3!?

This intuitive sacrifice was too tempting to miss. Its consequences are surprisingly difficult to calculate.

15...gxh4 16.Bxd7 Nxd7 17.Qxf7+ Kh8 18.d6 (18.Qg6 looks also promising) 18...Bg7

Black is running out of moves: the queen's rook and bishop are useless, and also other pieces have little space. But is this position worth a piece?

19.Nd5 h3 (19...Rf8 -+) 20.Ne7 hxg2 (20...Bd4+ 21.Kh1 hxg2+ -+) 21.Rf5 Rb8? (21...Rg8 -+) 22.Re1 (22.Rh5 works as well) 22...Rg8 23.Re6

23...Nf6 24.Rfxf6 Bxe6 25.Qxe6 Bxf6 (25...Kh7 26.Qf5+ mates) 26.Qxf6+ Kh7 27.Qf5+ Kh8 28.Ne5 Qe8 (it's over) 29.Nf7+ Qxf7 30.Qxf7 Rg7 31.Qf6 Kh7 32.Nf5 Rg4 33.d7 Ra8 34.Qxh6+ Kg8 35.Qe6+ Kh8 36.d8R+ Rxd8 37.Qf6+ Kh7 38.Qxd8 1-0