Cómo le gané al GM Iván Morovic

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[Event "Simultánea"]
[Site "Viña del Mar"]
[Date "1990.07.22"]
[Round "?"]
[White "Iván Morovic"]
[Black "Mario de la Cuadra"]
[Result "0-1"]
[ECO "C07"]
[WhiteElo "2545"]
[Annotator "Fritz 10 (30s)"]
[PlyCount "64"]

{C07: French Tarrasch: 3...c5, 4 Ngf3 and 4 exd5 Qxd5} 1. e4 e6 2. d4 d5 3. Nd2
c5 4. exd5 Qxd5 5. Ngf3 Nf6 6. Bc4 Qd8 7. O-O Nc6 8. Nb3 Nxd4 9. Nbxd4 cxd4 10.
Nxd4 Be7 11. c3 O-O 12. Qf3 Qc7 13. Bb3 {last book move} e5 14. Nf5 Bxf5 15.
Qxf5 {White has the pair of bishops} Rad8 16. Be3 b5 (16... Nd5 17. Rad1 Nxe3
18. fxe3 $11) 17. Rfe1 g6 {Black threatens to win material: g6xf5} 18. Qf3 e4 (
18... a5 19. Bc2 $14) 19. Qe2 (19. Qg3 Qxg3 20. hxg3 a5 $16) 19... a6 (19...
Bd6 20. Qxb5 Bxh2+ 21. Kf1 $16) 20. a4 (20. Bd4 Rfe8 $16) 20... bxa4 (20... Bc5
21. axb5 axb5 22. h3 $14) 21. Rxa4 $16 Rd3 (21... Rb8 $5 22. Ba2 Bd6 $16) 22.
Bc2 Qc6 (22... Rd7 $142 $18) 23. Ra3 $4 {stumbles just before the finish line}
(23. Rea1 $142 {would have given White the upper hand} Rd6 24. Rxa6 $18) 23...
Bxa3 $19 24. Bxd3 exd3 25. Qxd3 (25. Qd2 Rd8 26. bxa3 $19) 25... Bxb2 26. Bd4 (
26. Bd2 {a fruitless try to alter the course of the game} Re8 27. Rxe8+ Nxe8
$19) 26... Nd5 27. Qf3 (27. h3 {does not win a prize} Bxc3 28. Bxc3 Qxc3 $19)
27... Bxc3 28. Rc1 (28. Bxc3 {cannot change destiny} Qxc3 29. Qd1 a5 $19) 28...
Re8 29. Bxc3 Qxc3 $3 {Mate attack} 30. Qxc3 (30. Rxc3 Re1# {Mate attack}) (30.
Qxc3 Nxc3 {Combination}) (30. -- Qxc1+ {Mate threat}) 30... Nxc3 31. Kf1 Nb5
32. Ra1 Re6 0-1