[Event "Troisdorf op"]
[Site "Troisdorf"]
[Date "1999.??.??"]
[Round "?"]
[White "Bonus, Christian"]
[Black "Clasen, Lothar"]
[Result "1-0"]
[ECO "B84"]
[PlyCount "53"]
[EventDate "1999.10.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6 7. 0-0 Be7 8. f4 0-0 9. Rf3 Bd7 10. Rg3 Nc6 11. Be3 Qc7 12. f5 Nxd4 13. Qxd4 exf5 14. Bh6 g6 15. Nd5 Qc5 16. Nxe7+ Kh8 17. Qxc5 dxc5 18. exf5 Rfe8 19. Re3 gxf5 20. Rd1 Be6 21. Rg3 Ng4 22. Bg5 f6 23. Bxg4 fxg5 24. Nxf5 Bxa2 25. Nd6 Re7 26. Bf3 Rd8 27. Nf7+ 1-0

[Event "Troisdorf op"]
[Site "Troisdorf"]
[Date "1999.??.??"]
[Round "?"]
[White "Clasen, Lothar"]
[Black "Ivanov, Kirill"]
[Result "1-0"]
[ECO "D06"]
[PlyCount "61"]
[EventDate "1999.10.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nf6 3. cxd5 Nxd5 4. e4 Nf6 5. Nc3 Nc6 6. Nf3 Bg4 7. d5 Bxf3 8. Qxf3 Ne5 9. Qd1 c6 10. Bf4 Ng6 11. Be3 Qd7 12. Be2 e6 13. Qb3 Be7 14. dxc6 bxc6 15. Rd1 Qc7 16. 0-0 0-0 17. f4 e5 18. f5 Nh8 19. Rf3 Rfb8 20. Qc2 Ng4 21. Nd5 Nxe3 22. Rxe3 Qd8 23. Nf6+ Bxf6 24. Rxd8+ Rxd8 25. Qxc6 Rdc8 26. Qa6 Bd8 27. Rc3 Rxc3 28. bxc3 Bb6+ 29. Kf1 g6 30. Qb7 Rd8 31. f6 1-0

[Event "Troisdorf op"]
[Site "Troisdorf"]
[Date "1999.??.??"]
[Round "?"]
[White "Clasen, Lothar"]
[Black "Jorra, Carsten"]
[Result "1-0"]
[ECO "D40"]
[PlyCount "67"]
[EventDate "1999.10.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 c5 2. e3 d5 3. c4 e6 4. Nc3 Nf6 5. Nf3 Nc6 6. a3 b6 7. cxd5 exd5 8. Bb5 Bd7 9. Qa4 Rc8 10. 0-0 a6 11. Bxc6 Bxc6 12. Qxa6 Bd6 13. dxc5 bxc5 14. Rb1 Qd7 15. b4 cxb4 16. axb4 d4 17. Nxd4 Bxg2 18. Kxg2 Qg4+ 19. Kh1 Qh3 20. f4 Rxc3 21. Bd2 Ng4 22. Nf3 Rd3 23. Qxd3 Ke7 24. Qe4+ Kd7 25. Qb7+ Ke8 26. Rbc1 Be7 27. b5 f6 28. Bb4 Kf7 29. Qxe7+ Kg6 30. Qe4+ Kh6 31. f5 Rc8 32. Qf4+ Kh5 33. Ng1 Qh4 34. Rxc8 1-0

[Event "Troisdorf op"]
[Site "Troisdorf"]
[Date "1999.??.??"]
[Round "?"]
[White "Clasen, Lothar"]
[Black "Klein, Andreas"]
[Result "1/2-1/2"]
[ECO "D94"]
[PlyCount "71"]
[EventDate "1999.10.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 0-0 6. b3 c5 7. Bd3 Nc6 8. h3 cxd4 9. exd4 dxc4 10. Bxc4 e6 11. 0-0 a6 12. a4 Qc7 13. Ne2 Rd8 14. Qc2 Nb4 15. Qc3 Nfd5 16. Bxd5 Qxc3 17. Nxc3 Nxd5 18. Nxd5 Rxd5 19. Be3 Bd7 20. Rac1 Bc6 21. Rfd1 h6 22. Kf1 Rad8 23. Ke2 R5d7 24. Ne5 Bxe5 25. dxe5 Rxd1 26. Rxd1 Rxd1 27. Kxd1 Bxg2 28. Bxh6 Bxh3 29. f4 Bg2 30. a5 Kh7 31. Bg5 Kg7 32. Kd2 Kf8 33. Kc3 Ke8 34. Kd4 Kd7 35. Kc5 Kc7 36. b4 1/2-1/2

[Event "Troisdorf op"]
[Site "Troisdorf"]
[Date "1999.??.??"]
[Round "?"]
[White "Clasen, Lothar"]
[Black "Ziabari, Morteza"]
[Result "0-1"]
[ECO "B00"]
[BlackElo "2095"]
[PlyCount "64"]
[EventDate "1999.10.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 b6 2. d4 Bb7 3. Nc3 e6 4. Nf3 Nf6 5. e5 Nd5 6. Nxd5 Bxd5 7. c4 Be4 8. Be2 Bb4+ 9. Bd2 Qe7 10. 0-0 Nc6 11. Bxb4 Nxb4 12. a3 Nc6 13. Re1 0-0 14. Bd3 Bg6 15. Bxg6 fxg6 16. Qd2 Rf5 17. Rad1 Raf8 18. d5 Na5 19. Re4 Nb3 20. d6 Qf7 21. Qe3 Nc5 22. Red4 c6 23. b4 Nb7 24. a4 c5 25. bxc5 Nxc5 26. Rb1 g5 27. Rb2 h6 28. Rg4 Qh5 29. Rg3 g4 30. Nd4 Rxe5 31. Qd2 Ne4 32. Qe3 Nxg3 0-1

[Event "Troisdorf op"]
[Site "Troisdorf"]
[Date "1999.??.??"]
[Round "?"]
[White "Mertens, Etienne Andreas"]
[Black "Clasen, Lothar"]
[Result "1/2-1/2"]
[ECO "D37"]
[WhiteElo "2070"]
[PlyCount "47"]
[EventDate "1999.10.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. e3 0-0 6. Bd3 a6 7. 0-0 dxc4 8. Bxc4 b5 9. Bd3 Bb7 10. Ne5 Nbd7 11. Qc2 c5 12. b3 cxd4 13. exd4 Rc8 14. Qd2 Bb4 15. Bb2 Nxe5 16. dxe5 Nd5 17. Rac1 Nxc3 18. Bxc3 Bxc3 19. Rxc3 Qd5 20. Bxh7+ Kxh7 21. Rh3+ Kg8 22. Qg5 Qxg2+ 23. Qxg2 Bxg2 24. Kxg2 1/2-1/2

[Event "Troisdorf op"]
[Site "Troisdorf"]
[Date "1999.??.??"]
[Round "?"]
[White "Vitz, Hans Joachim"]
[Black "Clasen, Lothar"]
[Result "1-0"]
[ECO "E09"]
[PlyCount "63"]
[EventDate "1999.10.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 c6 5. Qc2 Be7 6. Bg2 0-0 7. 0-0 Nbd7 8. Nbd2 Re8 9. b3 Qc7 10. Bb2 b6 11. Ne5 Bd6 12. f4 Bb7 13. Rac1 Rac8 14. Qd3 Ba6 15. Qf3 Bb4 16. Nb1 Ne4 17. cxd5 exd5 18. Nxc6 Bd2 19. Ne7+ Rxe7 20. Rxc7 Rxc7 21. Rd1 Bb4 22. Rc1 Ndf6 23. Rxc7 Rxc7 24. Bf1 Rc2 25. Ba3 Bxa3 26. Nxa3 Rxa2 27. b4 Nd2 28. Qc3 Nfe4 29. Qc7 h6 30. b5 Rxa3 31. bxa6 Rxa6 32. Qc8+ 1-0

