[Event "Najdorf Festival op"]
[Site "Buenos Aires"]
[Date "1998.10.27"]
[Round "4"]
[White "Contessotto, Enrique"]
[Black "De Martin, Juan Alfredo"]
[Result "1-0"]
[ECO "C19"]
[PlyCount "47"]
[EventDate "1998.10.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Nf3 b6 8. a4 0-0 9. Bd3 f6 10. h4 f5 11. Ng5 Qe8 12. Bb5 Nec6 13. Ba3 a6 14. Bxc6 Qxc6 15. Qh5 h6 16. Qg6 hxg5 17. hxg5 Rf7 18. Qh7+ Kf8 19. g6 Raa7 20. gxf7 Kxf7 21. Qh5+ Kg8 22. Qh8+ Kf7 23. Rh7 Kg6 24. Rh3 1-0

[Event "Najdorf Festival op"]
[Site "Buenos Aires"]
[Date "1998.10.25"]
[Round "3"]
[White "De Martin, Juan Alfredo"]
[Black "Perez Pietronave, Carlos"]
[Result "0-1"]
[ECO "C40"]
[BlackElo "2295"]
[PlyCount "52"]
[EventDate "1998.10.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. d4 d6 5. Nc4 fxe4 6. Nc3 Qg6 7. f3 Be7 8. Bf4 Nc6 9. fxe4 Nf6 10. Ne3 Nh5 11. g3 Nxf4 12. gxf4 Bh4+ 13. Ke2 0-0 14. Qd3 Rxf4 15. Kd2 Bf6 16. Ne2 Rxe4 17. Rg1 Bg4 18. h3 Bxe2 19. Bxe2 Qxg1 20. Rxg1 Rxd4 21. Qxd4 Bxd4 22. c3 Bxe3+ 23. Kxe3 Re8+ 24. Kd2 Ne5 25. Bd1 d5 26. Rg3 Nc4+ 0-1

[Event "Najdorf Festival op"]
[Site "Buenos Aires"]
[Date "1998.10.24"]
[Round "1"]
[White "Roeder, Mathias"]
[Black "De Martin, Juan Alfredo"]
[Result "1-0"]
[ECO "A38"]
[WhiteElo "2445"]
[PlyCount "59"]
[EventDate "1998.10.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 0-0 5. Bg2 c5 6. c4 Nc6 7. 0-0 d6 8. Nc3 e5 9. e3 Bg4 10. h3 Bxf3 11. Bxf3 Qd7 12. Bg2 a6 13. d3 Rab8 14. Qd2 b5 15. Rac1 b4 16. Ne2 Nh5 17. d4 exd4 18. exd4 Qc7 19. Rcd1 Rbd8 20. g4 Nf6 21. d5 Nb8 22. Ng3 Nbd7 23. f4 Ne8 24. Ne4 h6 25. Bxg7 Kxg7 26. f5 Nef6 27. g5 Nxe4 28. gxh6+ Kh7 29. Bxe4 Ne5 30. Qg5 1-0

[Event "ARG U20-ch"]
[Site "Tucuman"]
[Date "1977.??.??"]
[Round "7"]
[White "Daguer, Jose"]
[Black "De Martin, Juan Alfredo"]
[Result "0-1"]
[ECO "A88"]
[PlyCount "42"]
[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 f5 2. d4 Nf6 3. g3 d6 4. Bg2 g6 5. 0-0 Bg7 6. c4 0-0 7. Nc3 c6 8. b3 h6 9. Bb2 Nbd7 10. Nh4 Kh7 11. e4 e6 12. f4 c5 13. e5 Ng4 14. dxc5 dxe5 15. Qe2 exf4 16. Rxf4 Nxc5 17. Rff1 Nd3 18. Nf3 Qb6+ 19. Kh1 Ndf2+ 20. Rxf2 Nxf2+ 21. Kg1 Ne4+ 0-1

[Event "ARG U20-ch"]
[Site "Tucuman"]
[Date "1977.??.??"]
[Round "2"]
[White "De Martin, Juan Alfredo"]
[Black "Ibar, Marcelo Rodolfo"]
[Result "0-1"]
[ECO "A30"]
[PlyCount "96"]
[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 c5 2. c4 Nf6 3. g3 b6 4. Bg2 Bb7 5. 0-0 e6 6. b3 Be7 7. Bb2 0-0 8. Nc3 Nc6 9. d4 Nxd4 10. Nxd4 Bxg2 11. Kxg2 cxd4 12. Qxd4 Qc7 13. e4 Rac8 14. Rfd1 Qc6 15. Rac1 Rfd8 16. f3 Ne8 17. Rd3 f6 18. Qe3 Rc7 19. Rcd1 d6 20. Qd2 a6 21. Ne2 Kf7 22. Nd4 Qb7 23. a4 Rcd7 24. b4 Rc7 25. Rc1 d5 26. exd5 exd5 27. Nf5 dxc4 28. Rxd8 Bxd8 29. b5 axb5 30. axb5 Rd7 31. Qe2 Qd5 32. Re1 Qd2 33. Nd4 Qxe2+ 34. Rxe2 Be7 35. Rc2 Nc7 36. Rxc4 Nxb5 37. Nb3 Rd3 38. Bd4 Rxb3 39. Bxb6 Nd6 40. Rc6 Ke6 41. Bf2 Rb2 42. g4 Kd7 43. Ra6 Bd8 44. Kg1 Rb1+ 45. Kg2 Rb2 46. h4 Nc4 47. Ra7+ Ke8 48. g5 Rxf2+ 0-1

[Event "ARG U20-ch"]
[Site "Tucuman"]
[Date "1977.??.??"]
[Round "9"]
[White "De Martin, Juan Alfredo"]
[Black "Lasalle Casenave, Abel"]
[Result "1/2-1/2"]
[ECO "A05"]
[PlyCount "56"]
[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 b5 3. Bb2 Bb7 4. e3 b4 5. d4 e6 6. Be2 Be7 7. 0-0 0-0 8. Nbd2 d6 9. c4 Nbd7 10. Re1 c5 11. Bd3 Qc7 12. e4 cxd4 13. Bxd4 Ne5 14. Bf1 Ng6 15. Qc1 e5 16. Bb2 Nh5 17. g3 Qd7 18. Bg2 f5 19. Qd1 fxe4 20. Nxe4 Qf5 21. Nfd2 Bxe4 22. Nxe4 Nf6 23. Nxf6+ Qxf6 24. Bxa8 Qxf2+ 25. Kh1 Qxb2 26. Bd5+ Kh8 27. Re2 Qa3 28. Qc2 Qa5 1/2-1/2

[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 "4"]
[White "De Martin, Juan Alfredo"]
[Black "Peiro, Sergio F"]
[Result "1-0"]
[ECO "B14"]
[PlyCount "51"]
[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 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Bf4 e6 6. Nf3 Be7 7. Nc3 0-0 8. c5 b6 9. b4 a5 10. a3 Bb7 11. Bb5 Nfd7 12. 0-0 f6 13. Qb3 Kh8 14. Bg3 e5 15. dxe5 bxc5 16. Nxd5 Nxe5 17. Rfd1 Nxf3+ 18. gxf3 Bxd5 19. Rxd5 Qb6 20. bxc5 Bxc5 21. Qc4 Rc8 22. Rc1 Na6 23. Kg2 Bf8 24. Qxc8 Rxc8 25. Rxc8 Kg8 26. Rdd8 1-0

[Event "ARG U20-ch"]
[Site "Tucuman"]
[Date "1977.??.??"]
[Round "5"]
[White "Gorisnic, Eduardo"]
[Black "De Martin, Juan Alfredo"]
[Result "1-0"]
[ECO "D36"]
[PlyCount "90"]
[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. Bg5 d5 4. cxd5 exd5 5. Nc3 Be7 6. e3 0-0 7. Qc2 c6 8. Bd3 Nbd7 9. Nf3 Re8 10. 0-0 Nf8 11. Rab1 Bg4 12. Ne5 Bh5 13. b4 N6d7 14. Bxe7 Rxe7 15. Nxd7 Qxd7 16. b5 Bg6 17. Bxg6 Nxg6 18. bxc6 Qxc6 19. Rfc1 Rc8 20. Qb3 Rec7 21. g3 Qd7 22. Qa3 b6 23. Ne2 Rc4 24. Rc3 h5 25. h4 Qg4 26. Rxc4 Rxc4 27. Kf1 Qe4 28. Rc1 Qe7 29. Qxe7 Nxe7 30. Nc3 b5 31. Ke1 Kf8 32. Kd2 a6 33. Rb1 Ke8 34. Kd3 Rc6 35. a4 bxa4 36. Nxa4 a5 37. Nc5 Rc8 38. Rb5 Ra8 39. Na4 Ra6 40. Rb8+ Kd7 41. Nc5+ Kd6 42. Nxa6 Nc6 43. Rb6 Kd7 44. Nc5+ Kc7 45. Rb7+ Kd6 1-0

[Event "ARG U20-ch"]
[Site "Tucuman"]
[Date "1977.??.??"]
[Round "3"]
[White "Mahia, Gustavo"]
[Black "De Martin, Juan Alfredo"]
[Result "1/2-1/2"]
[ECO "B09"]
[PlyCount "96"]
[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 g6 2. d4 Bg7 3. Nc3 d6 4. f4 Nf6 5. Nf3 0-0 6. Bd3 Nc6 7. 0-0 Bg4 8. Be2 Bxf3 9. Bxf3 e5 10. Ne2 exd4 11. Nxd4 Nxd4 12. Qxd4 Re8 13. Qd3 c6 14. c4 Qe7 15. Re1 d5 16. e5 dxc4 17. Qxc4 Red8 18. Be3 Nd7 19. Bg4 Nb6 20. Qc2 Qb4 21. e6 fxe6 22. Bxe6+ Kh8 23. Rab1 Nd5 24. Bd2 Qd4+ 25. Kh1 Nb4 26. Bxb4 Qxb4 27. Qc4 Qxc4 28. Bxc4 Rd4 29. Bb3 Rxf4 30. Re7 Rb8 31. g3 Rff8 32. Rd1 Rfe8 33. Rf7 Rf8 34. Re7 Bf6 35. Rc7 Bd8 36. Rcd7 a5 37. h4 Bf6 38. h5 Rfd8 39. hxg6 hxg6 40. Bc2 Rxd7 41. Rxd7 Bxb2 42. Bxg6 c5 43. Rc7 b6 44. a4 Kg8 45. g4 Bd4 46. Bd3 Be5 47. Bc4+ Kh8 48. Re7 Bd4 1/2-1/2

[Event "ARG U20-ch"]
[Site "Tucuman"]
[Date "1977.??.??"]
[Round "1"]
[White "Negri, Sergio"]
[Black "De Martin, Juan Alfredo"]
[Result "1-0"]
[ECO "C50"]
[PlyCount "45"]
[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 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Bc4 0-0 6. 0-0 Nc6 7. h3 e5 8. Be3 exd4 9. Nxd4 Re8 10. Re1 Bd7 11. a3 Nxd4 12. Bxd4 Bc6 13. Qd2 Qd7 14. Rad1 a5 15. Qd3 Rad8 16. a4 Qe7 17. Re2 Nh5 18. Bxg7 Kxg7 19. g3 Nf6 20. f4 Nxe4 21. Nxe4 Bxe4 22. Qd4+ Kh6 23. Bd5 1-0

[Event "ARG U20-ch"]
[Site "Tucuman"]
[Date "1977.??.??"]
[Round "8"]
[White "Roncarolo, Nestor"]
[Black "De Martin, Juan Alfredo"]
[Result "0-1"]
[ECO "A44"]
[PlyCount "94"]
[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 c5 2. d5 e5 3. c4 d6 4. e4 Be7 5. Bd3 Nf6 6. Ne2 0-0 7. Ng3 Ne8 8. 0-0 Bg5 9. Nc3 g6 10. Nce2 Bxc1 11. Rxc1 Ng7 12. Qd2 g5 13. Nf5 Bxf5 14. exf5 Nd7 15. Ng3 h6 16. Rce1 Nf6 17. f3 Rb8 18. Ne4 Nxe4 19. fxe4 Nh5 20. g3 Nf6 21. h4 Nh7 22. hxg5 Qxg5 23. Qxg5+ Nxg5 24. Kg2 Kg7 25. f6+ Kg6 26. Rf2 h5 27. Bc2 Rh8 28. Ba4 Rbd8 29. Rh1 Rh6 30. Bd1 Rdh8 31. Rh4 Nh7 32. g4 hxg4 33. Rxg4+ Ng5 34. Rf5 Rh2+ 35. Kg1 Rh1+ 36. Kg2 R8h2+ 37. Kg3 Rh5 38. Bf3 Rg1+ 39. Bg2 Kh6 40. Rf1 Nxe4+ 41. Rxe4 Rg5+ 42. Kf3 R1xg2 43. Rf2 Rxf2+ 44. Kxf2 Rf5+ 45. Kg3 Rxf6 46. Re2 Rg6+ 47. Kf3 f5 0-1

