[Event "ARG U20-ch"]
[Site "Tucuman"]
[Date "1977.??.??"]
[Round "2"]
[White "Braga, Fernando Alberto"]
[Black "Ochoa, Mario"]
[Result "1-0"]
[ECO "B53"]
[PlyCount "49"]
[EventDate "1977.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 e6 9. 0-0-0 Be7 10. Rd2 0-0 11. Qe3 Qc7 12. Nd4 Ng4 13. Qf4 Bxg5 14. Qxg5 Nf6 15. Re1 Rfd8 16. f4 a6 17. Re3 h6 18. Qh4 Rac8 19. g4 d5 20. g5 hxg5 21. fxg5 Nxe4 22. Nxe4 dxe4 23. g6 Be8 24. Qh7+ Kf8 25. Nxe6+ 1-0

[Event "ARG U20-ch"]
[Site "Tucuman"]
[Date "1977.??.??"]
[Round "4"]
[White "Casafus, Ruben Andres"]
[Black "Ochoa, Mario"]
[Result "1-0"]
[ECO "D38"]
[PlyCount "67"]
[EventDate "1977.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7 5. Bg5 Bb4 6. e3 c5 7. Bd3 Qa5 8. 0-0 0-0 9. Ne2 cxd4 10. exd4 dxc4 11. Bxc4 b5 12. Bd3 Bd6 13. Ng3 Bb7 14. Qe2 b4 15. Bxf6 Nxf6 16. Ne5 Qd5 17. f4 Qxd4+ 18. Kh1 Rad8 19. Rad1 Qc5 20. Ng4 Nxg4 21. Qxg4 f5 22. Qe2 Bd5 23. Rc1 Qb6 24. b3 Rfe8 25. Bc4 Be7 26. Rfe1 Bf6 27. Nxf5 Bc3 28. Red1 Kh8 29. Ne3 Qb8 30. Qg4 Be4 31. Rxd8 Rxd8 32. Rd1 Rf8 33. Bxe6 Rxf4 34. Qxf4 1-0

[Event "ARG U20-ch"]
[Site "Tucuman"]
[Date "1977.??.??"]
[Round "8"]
[White "Daguer, Jose"]
[Black "Ochoa, Mario"]
[Result "0-1"]
[ECO "B53"]
[PlyCount "116"]
[EventDate "1977.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 e6 9. 0-0-0 Be7 10. Rhe1 0-0 11. h3 Qb6 12. Qxb6 axb6 13. Kb1 Rfd8 14. Nd4 Kf8 15. g4 h6 16. Bh4 Rd7 17. f3 Rdd8 18. Ndb5 Ra5 19. Nd4 b5 20. Bf2 Nd7 21. a3 Rda8 22. Nb3 R5a6 23. Bg3 Nc5 24. Na2 Nxb3 25. cxb3 d5 26. b4 dxe4 27. fxe4 Rd8 28. Nc3 Raa8 29. Kc2 Rac8 30. Rxd8+ Rxd8 31. Rd1 Rxd1 32. Kxd1 Bf6 33. e5 Bd8 34. Ke2 Bc7 35. b3 f6 36. a4 fxe5 37. Nxb5 Bxb5+ 38. axb5 Bd6 39. Ke3 Kf7 40. Ke4 Kf6 41. h4 g6 42. Be1 h5 43. g5+ Ke7 44. Kd3 Kd7 45. Kc4 Kc7 46. Bf2 Kd7 47. Bc5 e4 48. Bf2 e3 49. Be1 Bh2 50. Kd3 Bg1 51. Bg3 Bf2 52. Bf4 Bxh4 53. Kxe3 Be1 54. Ke4 Bxb4 55. Bg3 Bd2 56. Bh4 Kd6 57. Bg3+ Kc5 58. Bh4 Bc3 0-1

[Event "ARG U20-ch"]
[Site "Tucuman"]
[Date "1977.??.??"]
[Round "6"]
[White "De Martin, Juan Alfredo"]
[Black "Ochoa, Mario"]
[Result "1/2-1/2"]
[ECO "B53"]
[PlyCount "54"]
[EventDate "1977.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 a6 5. c4 Nc6 6. Qd2 g6 7. Nc3 Bg7 8. Be2 Nf6 9. 0-0 0-0 10. h3 Be6 11. Rb1 Rc8 12. b3 h6 13. Bb2 Qa5 14. Rfd1 Nd7 15. a3 Kh7 16. b4 Qd8 17. Rbc1 Nce5 18. Nxe5 Nxe5 19. Nd5 f5 20. f4 Nd7 21. Bxg7 Kxg7 22. Qd4+ Kh7 23. exf5 Bxf5 24. Qe3 e5 25. fxe5 Re8 26. Qf2 Rxe5 27. Bf3 a5 1/2-1/2

[Event "ARG U20-ch"]
[Site "Tucuman"]
[Date "1977.??.??"]
[Round "1"]
[White "Ochoa, Mario"]
[Black "Barbero, Gerardo F"]
[Result "1-0"]
[ECO "D16"]
[PlyCount "62"]
[EventDate "1977.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 Nf6 3. c4 c6 4. Nc3 dxc4 5. a4 Bg4 6. Ne5 Bh5 7. f3 Nbd7 8. g4 Bg6 9. h4 h6 10. Nxg6 fxg6 11. Qc2 Kf7 12. e3 e6 13. Bxc4 Bd6 14. h5 Nf8 15. hxg6+ Nxg6 16. Bxe6+ Kxe6 17. Qxg6 Qe8 18. Qxe8+ Rhxe8 19. e4 Bg3+ 20. Kf1 Bc7 21. g5 hxg5 22. Bxg5 Bb6 23. Rd1 Rf8 24. Ke2 Rf7 25. d5+ cxd5 26. Bxf6 gxf6 27. Nxd5 Bc5 28. Nf4+ Ke7 29. Ng6+ Ke6 30. f4 Bd6 31. f5+ Kd7 1-0

[Event "ARG U20-ch"]
[Site "Tucuman"]
[Date "1977.??.??"]
[Round "3"]
[White "Ochoa, Mario"]
[Black "Gasparini, Jose"]
[Result "0-1"]
[ECO "D40"]
[PlyCount "102"]
[EventDate "1977.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 c5 3. c4 e6 4. Nc3 Nc6 5. e3 Nf6 6. b3 cxd4 7. Nxd4 e5 8. Nxc6 bxc6 9. cxd5 cxd5 10. Bb2 d4 11. exd4 Bb4 12. Bb5+ Bd7 13. 0-0 Bxc3 14. Bxd7+ Qxd7 15. Bxc3 e4 16. Bb4 Nd5 17. Bc5 f5 18. Qd2 h6 19. Rfe1 Kf7 20. f3 e3 21. Rxe3 Nxe3 22. Qxe3 Rhe8 23. Qd3 Qd5 24. Rc1 a5 25. Qc4 Qxc4 26. Rxc4 Re2 27. Ra4 Rb2 28. Kf1 Re8 29. Rxa5 Ree2 30. Ra7+ Kg6 31. d5 Rec2 32. Bb4 Rf2+ 33. Ke1 Rxg2 34. Kf1 Rxh2 35. Kg1 Rbg2+ 36. Kf1 Rxa2 37. Rxa2 Rxa2 38. Bc3 Kf7 39. Be5 g5 40. b4 Rd2 41. d6 Ke6 42. Bg7 h5 43. Bh6 Kf6 44. Bf8 g4 45. fxg4 hxg4 46. b5 Ke6 47. Bh6 Rb2 48. Bf4 Rxb5 49. Kg2 Rd5 50. Kg3 Rxd6 51. Kf2 Rd4 0-1

[Event "ARG U20-ch"]
[Site "Tucuman"]
[Date "1977.??.??"]
[Round "7"]
[White "Ochoa, Mario"]
[Black "Mahia, Gustavo"]
[Result "0-1"]
[ECO "E92"]
[PlyCount "58"]
[EventDate "1977.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 g6 3. c4 Bg7 4. Nc3 0-0 5. e4 d6 6. Be2 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Bg5 Re8 10. 0-0-0 Be6 11. Nxe5 Nxe4 12. Nxe4 Bxe5 13. Nf6+ Bxf6 14. Bxf6 Nd7 15. Bc3 Nb6 16. b3 Bd5 17. c5 Bxg2 18. Rhg1 Nd5 19. Bb2 Rxe2 20. Rxg2 Ne3 21. fxe3 Rxg2 22. Be5 Re8 23. Bxc7 Rxe3 24. Bf4 Rc3+ 25. Kb1 Rxc5 26. h4 Kg7 27. Rd6 Rf5 28. Bc1 Rg1 29. Kc2 Rc5+ 0-1

[Event "ARG U20-ch"]
[Site "Tucuman"]
[Date "1977.??.??"]
[Round "9"]
[White "Ochoa, Mario"]
[Black "Vernales, Gustavo"]
[Result "1/2-1/2"]
[ECO "E60"]
[PlyCount "33"]
[EventDate "1977.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. b3 g6 3. Bb2 Bg7 4. c4 d6 5. d4 0-0 6. e3 Nbd7 7. Qc2 Re8 8. Nc3 e5 9. dxe5 dxe5 10. Rd1 c6 11. Be2 e4 12. Ng5 Qe7 13. Rd4 c5 14. Rd2 Nf8 15. h4 h6 16. Nh3 Bxh3 17. Rxh3 1/2-1/2

[Event "ARG U20-ch"]
[Site "Tucuman"]
[Date "1977.??.??"]
[Round "5"]
[White "Ochoa, Mario"]
[Black "Zarlenga, Marcelo"]
[Result "1/2-1/2"]
[ECO "B43"]
[PlyCount "32"]
[EventDate "1977.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Qc7 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. Be2 Bb4 8. Qd3 Bxc3+ 9. bxc3 Nxe4 10. 0-0 Nxc3 11. Bf3 d5 12. Bd2 Nb5 13. Bb4 Nd6 14. Rfc1 0-0 15. c4 dxc4 16. Qa3 Rd8 1/2-1/2

