[Event "ARAIS tt"]
[Site "Santiago de Chile"]
[Date "1994.??.??"]
[Round "?"]
[White "Cisternas, Francisco"]
[Black "Leon, Sergio"]
[Result "1-0"]
[ECO "B33"]
[PlyCount "61"]
[EventDate "1994.??.??"]
[EventType "team-tourn"]
[EventRounds "10"]
[EventCountry "CHI"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. a4 Be6 8. Bg5 a6 9. Na3 Be7 10. Bc4 h6 11. Bxf6 Bxf6 12. 0-0 Rc8 13. Nd5 Bxd5 14. Qxd5 0-0 15. c3 Na5 16. Ba2 Qc7 17. Rfd1 Be7 18. Rac1 Kh8 19. b4 Nc6 20. Nc4 f5 21. exf5 Rxf5 22. Bb1 Rf6 23. Ne3 Qd7 24. Qe4 g6 25. Nd5 Rcf8 26. Nxf6 Bxf6 27. Qxg6 Bg5 28. Rxd6 Qc7 29. Rcd1 Rf7 30. Rd7 Rxd7 31. Qe8+ 1-0

[Event "ARAIS tt"]
[Site "Santiago de Chile"]
[Date "1994.??.??"]
[Round "?"]
[White "Leon, Sergio"]
[Black "Escobar, Damaso"]
[Result "0-1"]
[ECO "D78"]
[PlyCount "64"]
[EventDate "1994.??.??"]
[EventType "team-tourn"]
[EventRounds "10"]
[EventCountry "CHI"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 g6 3. c4 Bg7 4. Nc3 d5 5. g3 0-0 6. Bg2 e6 7. 0-0 c6 8. Qd3 b6 9. Rb1 a5 10. b3 Nbd7 11. Ba3 Re8 12. Ne5 Nxe5 13. dxe5 Nd7 14. f4 Bb7 15. e4 f6 16. exf6 Nxf6 17. e5 Nd7 18. Rfd1 Bf8 19. Bxf8 Nxf8 20. cxd5 exd5 21. h4 Qe7 22. Qe3 b5 23. Ne2 a4 24. b4 a3 25. Rb3 Ra4 26. Rd4 Ne6 27. Rd1 Rxb4 28. Rxb4 Qxb4 29. g4 Qc5 30. Nd4 Ra8 31. f5 Nxd4 32. Rxd4 Ra4 0-1

[Event "ARAIS tt"]
[Site "Santiago de Chile"]
[Date "1994.??.??"]
[Round "?"]
[White "Leon, Sergio"]
[Black "Flanagan, Cristian"]
[Result "1/2-1/2"]
[ECO "A53"]
[PlyCount "79"]
[EventDate "1994.??.??"]
[EventType "team-tourn"]
[EventRounds "10"]
[EventCountry "CHI"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 d6 3. c4 Bg4 4. Nc3 Nbd7 5. e3 e5 6. Be2 c6 7. 0-0 Be7 8. Qc2 0-0 9. Rd1 Qc7 10. b3 Rfe8 11. Bb2 Rad8 12. Rd2 Bf8 13. Rad1 Qc8 14. d5 c5 15. a4 h6 16. h3 Bh5 17. Nh4 Bxe2 18. Rxe2 g6 19. Rde1 Bg7 20. Nb5 Qb8 21. e4 a6 22. Nc3 Nf8 23. Bc1 Nh5 24. g3 Kh7 25. Kh2 Bf6 26. Ng2 g5 27. Ne3 Ng6 28. Ncd1 Rd7 29. Nf5 Ng7 30. Nde3 Nxf5 31. Nxf5 Ne7 32. g4 Nxf5 33. gxf5 Be7 34. Qd3 Kg7 35. Rg1 f6 36. Qf3 Rf8 37. Qh5 Qe8 38. Qxe8 Rxe8 39. f3 Kf7 40. Reg2 1/2-1/2

[Event "ARAIS tt"]
[Site "Santiago de Chile"]
[Date "1994.??.??"]
[Round "?"]
[White "Leon, Sergio"]
[Black "Loayza, Roberto"]
[Result "0-1"]
[ECO "D03"]
[PlyCount "76"]
[EventDate "1994.??.??"]
[EventType "team-tourn"]
[EventRounds "10"]
[EventCountry "CHI"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 e6 3. Bg5 Be7 4. Nbd2 d5 5. e3 Nbd7 6. Bd3 c5 7. c3 h6 8. Bh4 b6 9. Qe2 Bb7 10. 0-0 0-0 11. Rad1 Rc8 12. Bb1 Ne8 13. Bg3 Ndf6 14. Ne5 Nd6 15. f4 Nf5 16. Bf2 h5 17. h3 g6 18. g4 Ng7 19. g5 Nd7 20. Ndf3 Nf5 21. Nh4 Nxe5 22. Nxf5 exf5 23. dxe5 Qc7 24. Kh2 Qc6 25. Rg1 Kg7 26. Bc2 Rfd8 27. h4 b5 28. Bd3 a6 29. a3 Rd7 30. Bb1 Rcd8 31. Ba2 a5 32. Bb1 c4 33. Rd2 Bc5 34. Rgd1 d4 35. e4 d3 36. Bxd3 cxd3 37. Rxd3 Rxd3 38. Rxd3 Rxd3 0-1

[Event "ARAIS tt"]
[Site "Santiago de Chile"]
[Date "1994.??.??"]
[Round "?"]
[White "Leon, Sergio"]
[Black "Ramos, Duberly"]
[Result "0-1"]
[ECO "A43"]
[PlyCount "94"]
[EventDate "1994.??.??"]
[EventType "team-tourn"]
[EventRounds "10"]
[EventCountry "CHI"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 c5 3. g3 cxd4 4. Nxd4 e5 5. Nf3 e4 6. Nd4 Bc5 7. Bg2 Qf6 8. e3 Nh6 9. 0-0 0-0 10. c4 Bg4 11. f3 exf3 12. Bxf3 Bxf3 13. Rxf3 Qe5 14. cxd5 Nd7 15. Nc3 Nf6 16. Qd3 Rad8 17. Nf5 Nhg4 18. h3 g6 19. Nd4 Nh6 20. Kg2 Nxd5 21. Bd2 Nb4 22. Qe4 Qxe4 23. Nxe4 Be7 24. Bc3 Nd5 25. Bd2 Kg7 26. g4 Rc8 27. Rd1 Ng8 28. Nc3 Nb6 29. Bc1 Nf6 30. e4 Bb4 31. Nde2 Rfe8 32. a3 Bxc3 33. Nxc3 Nxe4 34. Nxe4 Rxe4 35. Rdf1 Rc7 36. Bf4 Rd7 37. g5 Nc4 38. Bc1 Re2+ 39. Kg3 h6 40. Rf4 Ne5 41. R4f2 Rxf2 42. Rxf2 Rd3+ 43. Kf4 Nc4 44. Rc2 b5 45. a4 a6 46. axb5 axb5 47. h4 h5 0-1

[Event "ARAIS tt"]
[Site "Santiago de Chile"]
[Date "1994.??.??"]
[Round "?"]
[White "Tapia, Jorge"]
[Black "Leon, Sergio"]
[Result "1-0"]
[ECO "C77"]
[PlyCount "67"]
[EventDate "1994.??.??"]
[EventType "team-tourn"]
[EventRounds "10"]
[EventCountry "CHI"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Be7 5. c3 Nf6 6. d3 d6 7. h3 b5 8. Bc2 Bb7 9. Nbd2 0-0 10. Nf1 Re8 11. g4 g6 12. Ng3 b4 13. g5 Nd7 14. h4 Nf8 15. Nh2 Bc8 16. Ng4 Bxg4 17. Qxg4 Ne6 18. h5 Bxg5 19. hxg6 fxg6 20. Bb3 Bxc1 21. Bxe6+ Rxe6 22. Qxe6+ Kg7 23. Rxc1 Qg5 24. Rd1 bxc3 25. bxc3 Rb8 26. Qd7+ Ne7 27. Qxc7 Rc8 28. Qxd6 Rxc3 29. Qxa6 Rc2 30. Qe6 Nc6 31. Qd7+ Ne7 32. a4 h5 33. Rg1 Kh6 34. Nf5+ 1-0

[Event "Santiago ARAIS tt-B"]
[Site "Santiago de Chile"]
[Date "1992.??.??"]
[Round "?"]
[White "Leon, Sergio"]
[Black "Figueroa Munoz, Samuel"]
[Result "1/2-1/2"]
[ECO "E67"]
[PlyCount "56"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CHI"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. Nf3 g6 2. d4 Nf6 3. c4 d6 4. Nc3 Bg7 5. g3 0-0 6. Bg2 Nbd7 7. 0-0 e5 8. dxe5 dxe5 9. Qc2 c6 10. Rd1 Qe7 11. a4 a5 12. b3 Re8 13. Ba3 Nc5 14. Ng5 Bf5 15. Nge4 Nfxe4 16. Nxe4 Bxe4 17. Bxe4 Bf8 18. h4 Qe6 19. Bg2 e4 20. Bxc5 Bxc5 21. e3 Re7 22. Qe2 Rae8 23. Ra2 Qf6 24. Qe1 Bb4 25. Qe2 Qc3 26. Qb2 Kg7 27. Kh2 f5 28. Qxc3+ Bxc3 1/2-1/2

[Event "Santiago ARAIS tt-B"]
[Site "Santiago de Chile"]
[Date "1992.??.??"]
[Round "?"]
[White "Leon, Sergio"]
[Black "Gonzalez, Victor"]
[Result "0-1"]
[ECO "E07"]
[PlyCount "82"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CHI"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. Nf3 e6 2. d4 d5 3. g3 Nf6 4. Bg2 Be7 5. 0-0 0-0 6. c4 c6 7. Qd3 Nbd7 8. Nc3 Re8 9. a4 a6 10. Re1 Nf8 11. e4 h6 12. Ne5 Bb4 13. Bd2 Be7 14. exd5 exd5 15. c5 Be6 16. b4 N6d7 17. f4 Nxe5 18. fxe5 Qd7 19. Rf1 Bg4 20. b5 Ne6 21. bxa6 Rxa6 22. a5 Bh5 23. Rf2 Bg6 24. Qf1 Nxd4 25. Bh3 Qc7 26. Bf4 Ne6 27. Bxe6 fxe6 28. Na4 Qxa5 29. Bd2 Qc7 30. Qh3 Bxc5 31. Nxc5 Rxa1+ 32. Rf1 Rxf1+ 33. Qxf1 Qxe5 34. Be1 Qd6 35. Nxb7 Qe7 36. Qa6 Rb8 37. Na5 Qc5+ 38. Kf1 Rf8+ 39. Kg2 Be4+ 40. Kh3 d4 41. Nb3 Qh5# 0-1

[Event "Santiago ARAIS tt-B"]
[Site "Santiago de Chile"]
[Date "1992.??.??"]
[Round "?"]
[White "Leon, Sergio"]
[Black "Peredo, Ricardo"]
[Result "1-0"]
[ECO "E65"]
[PlyCount "51"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CHI"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 g6 3. c4 Bg7 4. g3 d6 5. Bg2 0-0 6. 0-0 Nbd7 7. Nc3 c5 8. d5 a6 9. a4 h6 10. e4 Ng4 11. h3 Nge5 12. Qe2 Kh7 13. Kh2 Nxf3+ 14. Bxf3 Ne5 15. Bg2 f5 16. f4 Nf7 17. Ra3 Rb8 18. exf5 Bxf5 19. Ne4 e5 20. g4 Bxe4 21. Bxe4 exf4 22. Bxf4 Ne5 23. Kg2 Qd7 24. Qc2 Qe7 25. Re3 Qf7 26. Ree1 1-0

[Event "Santiago ARAIS tt-B"]
[Site "Santiago de Chile"]
[Date "1992.??.??"]
[Round "?"]
[White "Suazo, Alexis"]
[Black "Leon, Sergio"]
[Result "0-1"]
[ECO "B89"]
[PlyCount "85"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CHI"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 e6 7. Be3 Be7 8. Qe2 Bd7 9. a3 Qc7 10. Ndb5 Qb8 11. f4 0-0 12. g4 a6 13. Nd4 Nxd4 14. Bxd4 d5 15. Be5 Qd8 16. exd5 exd5 17. Nxd5 Nxd5 18. Bxd5 Qa5+ 19. Qd2 Bh4+ 20. Kd1 Bxg4+ 21. Kc1 Qxd2+ 22. Kxd2 Rad8 23. c4 Be6 24. Rhg1 f6 25. Bc7 Rd7 26. Ba5 Bxd5 27. cxd5 Rxd5+ 28. Ke3 Rxa5 29. Rg4 g5 30. Rag1 Kh8 31. R4g2 Re8+ 32. Kf3 h5 33. Rc2 Rf5 34. Rc4 g4+ 35. Kg2 Rd5 36. Rc2 f5 37. Rf1 Bf6 38. Rff2 h4 39. h3 g3 40. Rf3 Red8 41. Kf1 Rd1+ 42. Kg2 R8d2+ 43. Rxd2 0-1

