[Event "Curitiba 300 years op"]
[Site "Curitiba"]
[Date "1993.11.??"]
[Round "1"]
[White "Araque, Rafael"]
[Black "Leon, Guido"]
[Result "1-0"]
[ECO "A69"]
[WhiteElo "2210"]
[PlyCount "75"]
[EventDate "1993.11.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 0-0 6. Nf3 c5 7. d5 e6 8. Be2 exd5 9. cxd5 Re8 10. Nd2 a6 11. a4 b6 12. 0-0 Ra7 13. Bf3 Rae7 14. Nc4 Nxe4 15. Nxe4 Rxe4 16. Bxe4 Rxe4 17. Qb3 Bg4 18. Ne3 Be2 19. Re1 c4 20. Qa3 Bd3 21. Bd2 Bd4 22. Kh1 Bc5 23. Qc3 Bd4 24. Qc1 Qc8 25. Bc3 Bc5 26. Qd2 a5 27. b3 Re8 28. Nxc4 Be4 29. Qe2 Kf8 30. f5 Qxf5 31. Nd2 Be3 32. Nxe4 Qxe4 33. Bd2 Bxd2 34. Qxd2 Qh4 35. Qc3 Rxe1+ 36. Rxe1 f6 37. Qc8+ Kg7 38. Rg1 1-0

[Event "Curitiba 300 years op"]
[Site "Curitiba"]
[Date "1993.11.??"]
[Round "3"]
[White "Chemin, Vitorio"]
[Black "Leon, Guido"]
[Result "1-0"]
[ECO "A48"]
[WhiteElo "2245"]
[PlyCount "73"]
[EventDate "1993.11.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. Bf4 d6 4. e3 Bg7 5. Be2 0-0 6. 0-0 Nbd7 7. Nbd2 Re8 8. h3 e5 9. Bh2 exd4 10. exd4 Nf8 11. c4 Bf5 12. Re1 Ne4 13. Bf1 Nxd2 14. Qxd2 Be4 15. Ng5 Bc6 16. d5 Bd7 17. Ne4 Bf5 18. Nc3 a6 19. Rxe8 Qxe8 20. Re1 Qd8 21. Qe3 b6 22. Bf4 Qf6 23. Bg5 Qd4 24. Qc1 h5 25. Be3 Qf6 26. Bg5 Qd4 27. Rd1 Qe5 28. f4 Qe8 29. Re1 Qc8 30. Nd1 Nh7 31. Bh4 Nf6 32. Ne3 Be4 33. Qd2 Qd7 34. Qd4 Qe7 35. Nd1 Re8 36. Nf2 Ng4 37. Qxe4 1-0

[Event "Curitiba 300 years op"]
[Site "Curitiba"]
[Date "1993.11.??"]
[Round "6"]
[White "Leon, Guido"]
[Black "De Assis, Carlos Roberto"]
[Result "1-0"]
[ECO "B72"]
[PlyCount "79"]
[EventDate "1993.11.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nf6 3. Nc3 g6 4. d4 cxd4 5. Nxd4 Nc6 6. Be3 d6 7. Be2 Bg7 8. Qd2 e6 9. 0-0-0 Bd7 10. Ndb5 Bf8 11. Nxd6+ Bxd6 12. Qxd6 Ng8 13. Nb5 Rc8 14. Qa3 Qe7 15. Qxe7+ Ngxe7 16. Nd6+ Kf8 17. Bh6+ Kg8 18. Nxc8 Bxc8 19. Bb5 f6 20. Bxc6 Nxc6 21. Rd6 Kf7 22. Rhd1 g5 23. h4 Rg8 24. hxg5 fxg5 25. Rh1 Ne7 26. Rh5 Kf6 27. g3 b6 28. f4 gxf4 29. Bxf4 Ng6 30. Rxh7 Nxf4 31. gxf4 Rg1+ 32. Kd2 Rg4 33. Rc7 Ba6 34. f5 Ke5 35. Rxe6+ Kf4 36. f6 Rg2+ 37. Kc3 Rg3+ 38. Kb4 Bf1 39. f7 a5+ 40. Ka4 1-0

[Event "Curitiba 300 years op"]
[Site "Curitiba"]
[Date "1993.11.??"]
[Round "8"]
[White "Leon, Guido"]
[Black "De Haro, Martim Alfonso"]
[Result "1-0"]
[ECO "B30"]
[PlyCount "79"]
[EventDate "1993.11.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 e6 4. 0-0 Nge7 5. c3 a6 6. Be2 d5 7. d3 Ng6 8. Re1 Be7 9. Nbd2 0-0 10. Nf1 b5 11. Bd2 d4 12. cxd4 cxd4 13. Rc1 Bd7 14. Ng3 Rc8 15. Bf1 f6 16. Kh1 Bd6 17. Ne2 e5 18. Ng3 Nge7 19. Be2 Be6 20. b3 Kh8 21. Rf1 b4 22. Ng1 Qd7 23. Rc2 Na7 24. Rxc8 Rxc8 25. f4 Nb5 26. f5 Bf7 27. Bh5 Qe8 28. Qg4 Bxh5 29. Nxh5 Qf7 30. Qh4 Rc2 31. Bc1 Nc3 32. Nf3 Nxa2 33. Bd2 a5 34. g4 Ng8 35. g5 fxg5 36. Nxg5 Qe7 37. f6 gxf6 38. Nxf6 Nxf6 39. Rxf6 Rc7 40. Rh6 1-0

[Event "Curitiba 300 years op"]
[Site "Curitiba"]
[Date "1993.11.??"]
[Round "2"]
[White "Leon, Guido"]
[Black "Sales Filho, Espedito Severiano"]
[Result "1-0"]
[ECO "B13"]
[PlyCount "105"]
[EventDate "1993.11.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c6 2. Nf3 d5 3. exd5 cxd5 4. d4 Nf6 5. Bd3 Bg4 6. 0-0 e6 7. c3 Bd6 8. Nbd2 0-0 9. Qc2 Nc6 10. Re1 Rc8 11. Qb1 Qc7 12. h3 Bh5 13. b4 e5 14. Bf5 exd4 15. Bxc8 dxc3 16. Bf5 cxd2 17. Bxd2 Bxf3 18. gxf3 Be5 19. Kg2 Bxa1 20. Qxa1 Ne7 21. Bd3 Ng6 22. Qd4 Qd7 23. Bg5 Qd6 24. h4 h6 25. Bd2 Nxh4+ 26. Qxh4 Rc8 27. Qg3 Qb6 28. Bxh6 Nh5 29. Qg4 Rd8 30. Qxh5 gxh6 31. Qf5 Kf8 32. b5 Qd4 33. Re5 Rd6 34. Qc8+ Kg7 35. Qg4+ Rg6 36. Bxg6 Qxe5 37. Bd3+ Kf8 38. f4 Qc3 39. Qf5 Qg7+ 40. Kf3 Qd4 41. a4 Qxa4 42. Qxd5 Qd1+ 43. Ke4 Qe1+ 44. Kf5 Qxf2 45. Bc4 Qc2+ 46. Ke5 Qc3+ 47. Kd6 Qf6+ 48. Kc7 Qe7+ 49. Kb8 a5 50. Qxb7 h5 51. Qxe7+ Kxe7 52. Kc7 h4 53. b6 1-0

[Event "Curitiba 300 years op"]
[Site "Curitiba"]
[Date "1993.11.??"]
[Round "4"]
[White "Leon, Guido"]
[Black "Souza Neves, Andrey Marcelo"]
[Result "0-1"]
[ECO "B28"]
[PlyCount "54"]
[EventDate "1993.11.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 a6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nb3 Bb4 7. f3 d5 8. exd5 Nxd5 9. Bd2 Nxc3 10. bxc3 Be7 11. Bd3 Bh4+ 12. g3 Be7 13. Qe2 Qc7 14. 0-0-0 Be6 15. f4 Nd7 16. fxe5 Nxe5 17. Be4 Bg4 18. Qf2 Bxd1 19. Rxd1 0-0 20. Qf5 g6 21. Qf2 a5 22. Be3 Ng4 23. Qf4 Qxf4 24. Bxf4 Nf2 25. Rd4 Ba3+ 26. Kb1 Rfe8 27. Nd2 Rad8 0-1

[Event "Curitiba 300 years op"]
[Site "Curitiba"]
[Date "1993.11.??"]
[Round "9"]
[White "Pereira, Ernesto Luis De Ass"]
[Black "Leon, Guido"]
[Result "1-0"]
[ECO "C88"]
[PlyCount "97"]
[EventDate "1993.11.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 Be7 7. Re1 d6 8. a4 Bb7 9. d3 0-0 10. Nc3 b4 11. Ne2 Na5 12. Ba2 c5 13. Ng3 Bc8 14. Bd2 Nc6 15. h3 a5 16. Bc4 Bd7 17. c3 Qc8 18. Qe2 Be6 19. Bb5 Na7 20. d4 cxd4 21. Ba6 Qb8 22. cxd4 Re8 23. d5 Bd7 24. Rec1 Bf8 25. Nh4 Nc8 26. b3 Ne7 27. Bg5 Ng6 28. Bxf6 gxf6 29. Nhf5 Kh8 30. Rc2 Nf4 31. Qf1 Qb6 32. Be2 Rec8 33. Rac1 Rxc2 34. Rxc2 Rc8 35. Rxc8 Bxc8 36. Bb5 Qc5 37. Qc4 Qxc4 38. Bxc4 h5 39. Ne3 Kg8 40. Bb5 Be7 41. Ngf5 Bf8 42. h4 Ng6 43. g3 Bxf5 44. Nxf5 Ne7 45. Ne3 f5 46. exf5 Kg7 47. Be2 Kf6 48. Bxh5 Bh6 49. Ng4+ 1-0

[Event "Curitiba 300 years op"]
[Site "Curitiba"]
[Date "1993.11.??"]
[Round "7"]
[White "Sant'Ana, Rene Simonato"]
[Black "Leon, Guido"]
[Result "0-1"]
[ECO "A01"]
[PlyCount "68"]
[EventDate "1993.11.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. b3 e5 2. Bb2 d6 3. e3 Nc6 4. Bb5 Bd7 5. d4 exd4 6. exd4 d5 7. Nf3 Qe7+ 8. Qe2 Qxe2+ 9. Bxe2 0-0-0 10. 0-0 f6 11. c4 Re8 12. Nc3 dxc4 13. bxc4 Bb4 14. Bd3 Bg4 15. Nd5 Ba5 16. Ne3 Bh5 17. d5 Ne5 18. Nxe5 fxe5 19. Bf5+ Kb8 20. Be6 Nf6 21. Bxe5 Bd2 22. Bd4 Be2 23. Rfb1 Bxe3 24. Bxe3 Bxc4 25. Rd1 Rd8 26. Bg5 Rhf8 27. Rd4 Bb5 28. Rb1 Bd7 29. Rdb4 b6 30. Bf4 Bxe6 31. dxe6 Nd5 32. Rd4 Nxf4 33. e7 Ne2+ 34. Kf1 Nxd4 0-1

[Event "Wch U20"]
[Site "Buenos Aires"]
[Date "1992.??.??"]
[Round "?"]
[White "Al Tahir, Hisham"]
[Black "Leon, Guido"]
[Result "0-1"]
[ECO "E89"]
[PlyCount "90"]
[EventDate "1992.10.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "ARG"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 e5 7. d5 c6 8. Qd2 cxd5 9. cxd5 Nbd7 10. Nge2 Nh5 11. g4 Nf4 12. Nxf4 exf4 13. Bxf4 Ne5 14. Be2 f5 15. gxf5 gxf5 16. Bg5 Qe8 17. Bh6 Qh5 18. Bxg7 Kxg7 19. Rg1+ Kh8 20. 0-0-0 f4 21. Nb5 Qh6 22. Qd4 Bd7 23. Nxa7 Qxh2 24. Rde1 Qh4 25. Kb1 Qf6 26. Ref1 Nxf3 27. Qxf6+ Rxf6 28. Rxf3 Rxa7 29. Rc3 b5 30. Bxb5 Rg6 31. Rxg6 hxg6 32. Bxd7 Rxd7 33. Kc2 g5 34. Kd2 g4 35. Ke2 Kg7 36. b4 Kf6 37. b5 Ke5 38. Rc4 Rh7 39. a4 Rh2+ 40. Kf1 Rb2 41. Kg1 f3 42. b6 g3 43. Rc1 Rg2+ 44. Kh1 Rh2+ 45. Kg1 f2+ 0-1

[Event "Wch U20"]
[Site "Buenos Aires"]
[Date "1992.??.??"]
[Round "?"]
[White "Egger Mancilla, Jorge Alejandro"]
[Black "Leon, Guido"]
[Result "1-0"]
[ECO "C78"]
[WhiteElo "2460"]
[PlyCount "47"]
[EventDate "1992.10.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "ARG"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 Bb7 7. c3 Nxe4 8. d4 Na5 9. Nxe5 Nxb3 10. Qxb3 d5 11. a4 c6 12. Re1 Bd6 13. Rxe4 0-0 14. Re1 f6 15. Nd3 f5 16. Bf4 Bxf4 17. Nxf4 Qg5 18. g3 Rae8 19. Nd2 Re4 20. Nxe4 fxe4 21. Ne6 Qh5 22. Nxf8 Bc8 23. Rxe4 Kxf8 24. Rf4+ 1-0

[Event "Wch U20"]
[Site "Buenos Aires"]
[Date "1992.??.??"]
[Round "?"]
[White "Leon, Guido"]
[Black "Favaro, Edmar F"]
[Result "1/2-1/2"]
[ECO "B81"]
[BlackElo "2295"]
[PlyCount "66"]
[EventDate "1992.10.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "ARG"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g4 h6 7. h4 Nc6 8. Rg1 h5 9. gxh5 Rxh5 10. Bg5 Rh8 11. Qd2 Qb6 12. Nb3 Qc7 13. 0-0-0 a6 14. Be2 b5 15. a3 Bb7 16. f4 0-0-0 17. f5 b4 18. axb4 d5 19. exd5 Nxb4 20. fxe6 Bxd5 21. Kb1 Bc5 22. e7 Bxe7 23. Nxd5 Nfxd5 24. Bxe7 Qxe7 25. Rxg7 Rxh4 26. Rg4 Rh2 27. Bxa6+ Nxa6 28. Qxh2 Nc3+ 29. bxc3 Rxd1+ 30. Kb2 Nc7 31. Rc4 Qd6 32. Qh3+ Qd7 33. Qg2 Rd5 1/2-1/2

[Event "Wch U20"]
[Site "Buenos Aires"]
[Date "1992.??.??"]
[Round "?"]
[White "Leon, Guido"]
[Black "Masserey, Yvan"]
[Result "1/2-1/2"]
[ECO "C18"]
[BlackElo "2320"]
[PlyCount "81"]
[EventDate "1992.10.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "ARG"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. h4 Nbc6 8. h5 h6 9. Nf3 cxd4 10. cxd4 Qa5+ 11. Bd2 Qa4 12. Bd3 Nxd4 13. Kf1 Nef5 14. Rh3 Bd7 15. Rb1 Qc6 16. Nxd4 Nxd4 17. Qg4 Nf5 18. Bxf5 exf5 19. Qxg7 Qa6+ 20. Kg1 0-0-0 21. Rhb3 Be6 22. Qf6 b6 23. Rb4 Qe2 24. Bf4 Qxh5 25. Ra4 Kb7 26. Qe7+ Rd7 27. Qb4 Rb8 28. Be3 Kc8 29. Rxa7 Rxa7 30. Qf8+ Kc7 31. Qe7+ Bd7 32. e6 fxe6 33. Bf4+ Kc8 34. Bxb8 Kxb8 35. Qd8+ Bc8 36. Qxb6+ Rb7 37. Qd6+ Ka8 38. Qa6+ Kb8 39. Qd6+ Ka8 40. Qa6+ Kb8 41. Qd6+ 1/2-1/2

[Event "Wch U20"]
[Site "Buenos Aires"]
[Date "1992.??.??"]
[Round "?"]
[White "Leon, Guido"]
[Black "Nakamura, Ryuji"]
[Result "1/2-1/2"]
[ECO "B05"]
[PlyCount "100"]
[EventDate "1992.10.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "ARG"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 e6 6. 0-0 Be7 7. h3 Bh5 8. c4 Nb6 9. Nbd2 0-0 10. b3 Nc6 11. Bb2 d5 12. c5 Nc8 13. Nh2 Bg6 14. b4 Nxb4 15. Qb3 Nc6 16. Bb5 Qd7 17. Qg3 a6 18. Be2 N8a7 19. a4 b6 20. cxb6 cxb6 21. h4 h6 22. h5 Bh7 23. Ng4 Kh8 24. Ne3 Nb4 25. f4 Rac8 26. Bc1 Nc2 27. Nxc2 Rxc2 28. Bd3 Rc3 29. Rf3 Rxd3 30. Rxd3 Bxd3 31. Qxd3 b5 32. axb5 axb5 33. Nb3 Rb8 34. Bd2 Nc6 35. Rf1 b4 36. f5 f6 37. fxe6 Qxe6 38. Qg6 Qd7 39. exf6 Bxf6 40. Rxf6 gxf6 41. Qxf6+ Kg8 42. Qg6+ Kh8 43. Qxh6+ Kg8 44. Qg6+ Kh8 45. Bg5 Rf8 46. Bf6+ Rxf6 47. Qxf6+ Kg8 48. Qg6+ Kh8 49. Qf6+ Kg8 50. Qg6+ Kh8 1/2-1/2

[Event "Wch U20"]
[Site "Buenos Aires"]
[Date "1992.??.??"]
[Round "?"]
[White "Leon, Guido"]
[Black "Sequera Paolini, Jose Rafael"]
[Result "0-1"]
[ECO "C18"]
[BlackElo "2330"]
[PlyCount "94"]
[EventDate "1992.10.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "ARG"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. h4 Qa5 8. Bd2 cxd4 9. cxd4 Qa4 10. Nf3 Nbc6 11. h5 Nxd4 12. Bd3 Nec6 13. Kf1 Nf5 14. Qe2 Ncd4 15. Nxd4 Qxd4 16. Bb5+ Bd7 17. Bxd7+ Kxd7 18. Rb1 b6 19. Qb5+ Kc7 20. Qe2 Qc4 21. Qxc4+ dxc4 22. Rb4 Kb7 23. Rxc4 Rac8 24. Rxc8 Rxc8 25. c3 Rc5 26. g4 Ne7 27. Rh3 Rxe5 28. h6 g6 29. Rf3 f5 30. Bg5 Nc6 31. Rd3 Rd5 32. Rxd5 exd5 33. Ke2 fxg4 34. Bf6 Kc8 35. Ke3 Kd7 36. Kf4 Ke6 37. Bg7 Ne7 38. Kxg4 Nf5 39. Kg5 a6 40. f3 b5 41. Bf8 d4 42. cxd4 Nxd4 43. f4 a5 44. Bc5 Nc6 45. Bb6 b4 46. Bxa5 bxa3 47. Bc3 a2 0-1

[Event "Wch U20"]
[Site "Buenos Aires"]
[Date "1992.??.??"]
[Round "?"]
[White "Leon, Guido"]
[Black "Tratar, Marko"]
[Result "0-1"]
[ECO "B81"]
[BlackElo "2290"]
[PlyCount "70"]
[EventDate "1992.10.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "ARG"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g4 Nc6 7. h4 Nxd4 8. Qxd4 Nxg4 9. Bb5+ Bd7 10. Bg5 Qc8 11. 0-0-0 h6 12. Bd2 Bxb5 13. Nxb5 Qc6 14. e5 Nxe5 15. Nc3 Nf3 16. Qf4 Nxd2 17. Qxd2 Be7 18. Rhg1 Bf6 19. Rg3 a6 20. Rd3 d5 21. Ne2 Rc8 22. h5 0-0 23. f4 Qa4 24. Kb1 Rc7 25. c3 b5 26. Nd4 b4 27. cxb4 Rfc8 28. Ra3 Qd7 29. Rxa6 Rc4 30. Qe3 Bxd4 31. Rxd4 Rxd4 32. Qxd4 Qb5 33. a4 Qxa6 34. b5 Qa5 35. Ka2 Rc4 0-1

[Event "Wch U20"]
[Site "Buenos Aires"]
[Date "1992.??.??"]
[Round "?"]
[White "Milov, Vadim"]
[Black "Leon, Guido"]
[Result "1-0"]
[ECO "E73"]
[WhiteElo "2500"]
[PlyCount "61"]
[EventDate "1992.10.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "ARG"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Bg5 Nbd7 7. Qd2 e5 8. d5 a6 9. h4 Qe8 10. g4 b5 11. f3 bxc4 12. h5 Nc5 13. Bxc4 Rb8 14. Nge2 Bd7 15. Ng3 Rb4 16. b3 a5 17. Rd1 Qe7 18. Be3 Ne8 19. Qh2 f6 20. hxg6 hxg6 21. Qh7+ Kf7 22. Rh6 Rg8 23. Bxc5 Rxc4 24. bxc4 dxc5 25. d6 Nxd6 26. Rd5 Qd8 27. Rxg6 Ne8 28. Nh5 Kf8 29. Nxg7 Rxg7 30. Rxg7 Nxg7 31. Qh8+ 1-0

[Event "Wch U20"]
[Site "Buenos Aires"]
[Date "1992.??.??"]
[Round "?"]
[White "Munoz Pantoja, Miguel Angel"]
[Black "Leon, Guido"]
[Result "1/2-1/2"]
[ECO "A48"]
[WhiteElo "2295"]
[PlyCount "123"]
[EventDate "1992.10.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "ARG"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. Bf4 d6 4. h3 Bg7 5. e3 0-0 6. Be2 c6 7. 0-0 a5 8. c3 Bd7 9. Nbd2 Na6 10. Qc2 b5 11. Rfe1 Qc8 12. Rac1 c5 13. Bh2 Qb7 14. e4 cxd4 15. cxd4 Rac8 16. Qb1 Rxc1 17. Rxc1 Rc8 18. e5 dxe5 19. Nxe5 Rxc1+ 20. Qxc1 Nb8 21. Qc5 Be6 22. b3 Bh6 23. Bf3 Nd5 24. Ne4 Na6 25. Qc2 Nab4 26. Qe2 Qb6 27. a3 Nc6 28. Nxc6 Qxc6 29. Nc5 Bg7 30. Be5 Bxe5 31. Qxe5 Qc7 32. Qe1 Nf4 33. h4 Bd5 34. Qe3 Bxf3 35. Qxf3 e5 36. Nd3 Nxd3 37. Qxd3 Qc1+ 38. Qf1 Qxa3 39. Qxb5 Qa1+ 40. Kh2 Qxd4 41. Qxa5 Qxf2 42. Qa4 Qe1 43. Qg4 e4 44. Qf4 Qb4 45. h5 Qxb3 46. hxg6 hxg6 47. Qxe4 Qe6 48. Qd4 f6 49. Qd8+ Kf7 50. Qc7+ Qe7 51. Qc4+ Kg7 52. g3 g5 53. g4 Qe5+ 54. Kg2 Qb2+ 55. Kg3 Qd2 56. Qe4 Qd6+ 57. Kg2 Qe5 58. Qc4 Qa5 59. Qe4 Kh6 60. Qd4 Qe5 61. Qxe5 fxe5 62. Kf3 1/2-1/2

[Event "Wch U20"]
[Site "Buenos Aires"]
[Date "1992.??.??"]
[Round "?"]
[White "Rocha, Sergio MC"]
[Black "Leon, Guido"]
[Result "1-0"]
[ECO "C68"]
[WhiteElo "2310"]
[PlyCount "69"]
[EventDate "1992.10.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "ARG"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 Bg4 6. h3 h5 7. d3 Qf6 8. Nbd2 Ne7 9. Nc4 Ng6 10. hxg4 hxg4 11. Bg5 Qe6 12. Nh2 b5 13. Nd2 g3 14. fxg3 Bc5+ 15. Kh1 f6 16. Bh4 0-0-0 17. Qg4 Qxg4 18. Nxg4 Ne7 19. Kh2 g5 20. Kh3 gxh4 21. gxh4 Ng6 22. g3 Bd4 23. Rxf6 Rdg8 24. Rb1 Bc5 25. Nf3 Bd6 26. Rf5 Ne7 27. Rg5 Ng6 28. Rf5 Ne7 29. Ngxe5 Nxf5 30. exf5 Bxe5 31. Nxe5 Re8 32. Ng6 Rh6 33. Kg4 Kd7 34. Kg5 Rh7 35. g4 1-0

[Event "Wch U20"]
[Site "Buenos Aires"]
[Date "1992.??.??"]
[Round "?"]
[White "Sosa, Leonardo"]
[Black "Leon, Guido"]
[Result "1-0"]
[ECO "E92"]
[WhiteElo "2245"]
[PlyCount "57"]
[EventDate "1992.10.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "ARG"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. Be3 Nc6 8. d5 Ne7 9. Nd2 Nd7 10. b4 f5 11. f3 f4 12. Bf2 Nf6 13. c5 Ne8 14. Nc4 Bd7 15. Na5 Bc8 16. Rc1 g5 17. Qc2 Ng6 18. cxd6 cxd6 19. Nb5 Nh4 20. 0-0 g4 21. fxg4 f3 22. Bxh4 Qxh4 23. Bxf3 Bh6 24. Rce1 Bf4 25. g3 Bxg3 26. hxg3 Qxg3+ 27. Bg2 Rf6 28. Rxf6 Qxe1+ 29. Rf1 1-0

