[Event "Najdorf Festival op"]
[Site "Buenos Aires"]
[Date "1998.10.27"]
[Round "4"]
[White "Sobrero, Andrea"]
[Black "Lebensohn, Lisandro"]
[Result "0-1"]
[ECO "A49"]
[PlyCount "102"]
[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. Bg2 Bg7 4. d4 d6 5. c3 0-0 6. 0-0 Nbd7 7. Nbd2 Re8 8. Re1 e5 9. e4 Nb6 10. Nb3 Qe7 11. dxe5 dxe5 12. Qc2 c6 13. Be3 Nfd7 14. Rad1 Nc4 15. Bg5 f6 16. Bc1 Ndb6 17. Nbd2 Be6 18. Nxc4 Nxc4 19. b3 Nb6 20. Nh4 Rad8 21. c4 c5 22. Rxd8 Rxd8 23. Rd1 Na8 24. Be3 b6 25. Rd2 Nc7 26. Qd1 Rxd2 27. Qxd2 Na6 28. a3 Nb8 29. Qc2 Nc6 30. Nf3 Nd4 31. Nxd4 cxd4 32. Bc1 Qc5 33. Bf1 a5 34. Bb2 Bf8 35. a4 Qb4 36. Qd1 Bd7 37. Bc1 Bc6 38. Bd3 Qc3 39. Qc2 Qe1+ 40. Kg2 Bb4 41. f3 Kg7 42. h4 Bd7 43. f4 h6 44. fxe5 fxe5 45. Be2 Be6 46. Bf3 Bc3 47. Bd1 d3 48. Qxd3 Bd4 49. Qe2 Qg1+ 50. Kf3 Qh1+ 51. Qg2 Qxd1+ 0-1

[Event "Najdorf Festival op"]
[Site "Buenos Aires"]
[Date "1998.10.25"]
[Round "3"]
[White "Acosta, Francisco"]
[Black "Sobrero, Andrea"]
[Result "0-1"]
[ECO "C50"]
[PlyCount "42"]
[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. Bc4 Nf6 3. Nc3 Bc5 4. d3 d6 5. h3 Nc6 6. Nf3 h6 7. Bd2 0-0 8. Nd5 Nxd5 9. Bxd5 Ne7 10. Bb3 Kh8 11. 0-0 f5 12. Qe2 Ng6 13. c3 Qf6 14. Bc2 fxe4 15. Qxe4 Bf5 16. Qe2 Rae8 17. c4 Bb6 18. Bc3 Bxh3 19. Rfe1 Bxg2 20. d4 Bxf3 21. Qe3 Qh4 0-1

[Event "Najdorf Festival op"]
[Site "Buenos Aires"]
[Date "1998.10.25"]
[Round "2"]
[White "Sobrero, Andrea"]
[Black "Martinez, Juan Manuel"]
[Result "0-1"]
[ECO "C50"]
[PlyCount "106"]
[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 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. Bg5 0-0 6. Nc3 h6 7. Bh4 Bb4 8. 0-0 Bxc3 9. bxc3 Re8 10. Re1 Na5 11. Bb3 Nxb3 12. axb3 d6 13. h3 Bd7 14. d4 Qe7 15. Bxf6 gxf6 16. d5 f5 17. Nd2 f4 18. Qf3 Qh4 19. Qd3 Kh8 20. Nf3 Qh5 21. Kh2 Rg8 22. Rg1 f5 23. Nd2 Rg7 24. c4 fxe4 25. Nxe4 Bf5 26. Rae1 b6 27. c3 Bxe4 28. Qxe4 Rag8 29. g3 Rf8 30. b4 Rgf7 31. Rg2 fxg3+ 32. fxg3 Qf3 33. Qe3 Qxe3 34. Rxe3 Rf3 35. Rxf3 Rxf3 36. Rc2 a5 37. Kg2 Rd3 38. bxa5 bxa5 39. Kf2 Kg7 40. Kg2 Kg6 41. g4 Kg5 42. Kh2 Kh4 43. Kg2 Rxh3 44. Kf2 Kxg4 45. Kg1 Rg3+ 46. Kh2 h5 47. Kh1 h4 48. Kh2 h3 49. Kh1 Rg2 50. Rc1 Kg3 51. Re1 Rc2 52. Re3+ Kg4 53. Kg1 a4 0-1

[Event "Najdorf Festival op"]
[Site "Buenos Aires"]
[Date "1998.10.24"]
[Round "1"]
[White "Mela, Benjamin"]
[Black "Sobrero, Andrea"]
[Result "1-0"]
[ECO "C45"]
[WhiteElo "2160"]
[PlyCount "53"]
[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 Nc6 3. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 d6 6. Be3 Bd7 7. Nc3 Nf6 8. f3 Be7 9. 0-0-0 0-0 10. g4 Be6 11. h4 Nd7 12. h5 Bf6 13. Qd2 h6 14. Kb1 Ne5 15. Be2 c6 16. Rdg1 b5 17. f4 Nc4 18. Bxc4 Bxc4 19. g5 hxg5 20. fxg5 Be5 21. Bd4 Qe7 22. g6 b4 23. Nd1 c5 24. Bxe5 dxe5 25. h6 Qd8 26. Qh2 fxg6 27. hxg7 1-0

