[Event "GER-ch qgC15 corr9395"]
[Site "GER corr"]
[Date "1993.??.??"]
[Round "?"]
[White "Birnbaum, Detlev"]
[Black "Nattkaemper, Stefan"]
[Result "1-0"]
[ECO "D08"]
[PlyCount "37"]
[EventDate "1993.??.??"]
[EventType "tourn (corr)"]
[EventRounds "13"]
[EventCountry "GER"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 Bf5 6. a3 Qd7 7. g3 0-0-0 8. Bg2 f6 9. exf6 Nxf6 10. 0-0 Bh3 11. b4 Bxg2 12. Kxg2 g5 13. Nxg5 Ne5 14. Bb2 h5 15. Ndf3 Nxf3 16. Nxf3 c5 17. h4 Ne4 18. Qd3 Qg4 19. Ne5 1-0

[Event "GER-ch qgC15 corr9395"]
[Site "GER corr"]
[Date "1993.??.??"]
[Round "?"]
[White "Nattkaemper, Stefan"]
[Black "Bensberg, Georg"]
[Result "0-1"]
[ECO "C43"]
[PlyCount "44"]
[EventDate "1993.??.??"]
[EventType "tourn (corr)"]
[EventRounds "13"]
[EventCountry "GER"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qxd4 d5 6. exd6 Nxd6 7. Nc3 Nc6 8. Qf4 Be6 9. Bd3 Be7 10. Bd2 0-0 11. Be3 Bf6 12. 0-0 Bxc3 13. bxc3 Ne7 14. Nd4 Bd5 15. Rfd1 Ng6 16. Qg4 Re8 17. Nf5 Qc8 18. Nh6+ gxh6 19. Qxc8 Raxc8 20. Bxg6 hxg6 21. Rxd5 Nf5 22. Bd2 Re4 0-1

[Event "GER-ch qgC15 corr9395"]
[Site "GER corr"]
[Date "1993.??.??"]
[Round "?"]
[White "Nattkaemper, Stefan"]
[Black "Schleu, Guenther"]
[Result "0-1"]
[ECO "C40"]
[PlyCount "52"]
[EventDate "1993.??.??"]
[EventType "tourn (corr)"]
[EventRounds "13"]
[EventCountry "GER"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. Nc4 fxe4 5. Nc3 Qf7 6. d4 Bb4 7. Ne5 Qf5 8. Bc4 Nf6 9. g4 Nxg4 10. Nxg4 Rf8 11. 0-0 Bxc3 12. bxc3 d5 13. Be2 Qg6 14. Kh1 Qd6 15. Ne5 Nd7 16. a4 Rf6 17. Ba3 Qe6 18. Bg4 Qg8 19. Bxd7+ Bxd7 20. Nxd7 Kxd7 21. Qg4+ Qe6 22. Qxe6+ Rxe6 23. Rg1 g6 24. Rg5 c6 25. Re1 Rae8 26. Re3 h6 0-1

[Event "GER-ch qgC15 corr9395"]
[Site "GER corr"]
[Date "1993.??.??"]
[Round "?"]
[White "Nattkaemper, Stefan"]
[Black "Weneny, Johannes"]
[Result "0-1"]
[ECO "B12"]
[PlyCount "40"]
[EventDate "1993.??.??"]
[EventType "tourn (corr)"]
[EventRounds "13"]
[EventCountry "GER"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nc3 e6 5. g4 Bg6 6. Nge2 c5 7. h4 cxd4 8. Nxd4 h5 9. Bb5+ Nd7 10. f4 hxg4 11. f5 Rxh4 12. Rf1 Rh5 13. Bxd7+ Kxd7 14. Qxg4 exf5 15. Nxf5 Rxf5 16. Rxf5 Bxf5 17. Qxf5+ Ke8 18. Bg5 Qd7 19. Qf4 f6 20. exf6 gxf6 0-1

[Event "GER-ch qgC15 corr9395"]
[Site "GER corr"]
[Date "1993.??.??"]
[Round "?"]
[White "Neumann, Ulf"]
[Black "Nattkaemper, Stefan"]
[Result "0-1"]
[ECO "D08"]
[PlyCount "32"]
[EventDate "1993.??.??"]
[EventType "tourn (corr)"]
[EventRounds "13"]
[EventCountry "GER"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 Bf5 6. Nb3 Bb4+ 7. Bd2 Be7 8. Bf4 g5 9. Bg3 g4 10. Nfd2 Nb4 11. Rc1 Nxa2 12. Nxd4 Qxd4 13. Qa4+ c6 14. Qxa2 Bb4 15. Rd1 Rd8 16. b3 Bb1 0-1

[Event "GER-ch qgC15 corr9395"]
[Site "GER corr"]
[Date "1993.??.??"]
[Round "?"]
[White "Ramm, Matthias"]
[Black "Nattkaemper, Stefan"]
[Result "1-0"]
[ECO "B22"]
[PlyCount "41"]
[EventDate "1993.??.??"]
[EventType "tourn (corr)"]
[EventRounds "13"]
[EventCountry "GER"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nc6 5. Nf3 e6 6. Be2 Nf6 7. 0-0 Be7 8. Be3 Ng4 9. Bf4 0-0 10. h3 Nf6 11. Be3 Rd8 12. dxc5 Qf5 13. Nd4 Qxc5 14. Qb3 Qa5 15. Nd2 e5 16. Nxc6 bxc6 17. Nc4 Qc7 18. Qc2 Nd5 19. Bd3 g6 20. Rfe1 f5 21. f3 1-0

[Event "FRG-chT qual corr"]
[Site "GER corr"]
[Date "1991.??.??"]
[Round "?"]
[White "Blum, Alfred"]
[Black "Nattkaemper, Stefan"]
[Result "1-0"]
[ECO "B74"]
[PlyCount "45"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "12"]
[EventCountry "GER"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. Nb3 0-0 9. 0-0 Be6 10. f4 Qc8 11. Qe1 Nb4 12. Nd4 Bc4 13. a3 Bxe2 14. Qxe2 Nc6 15. Rad1 Nxd4 16. Bxd4 Qc6 17. e5 dxe5 18. Qxe5 e6 19. Qg5 h6 20. Qh4 Nh5 21. Bxg7 Nxg7 22. Rd3 Nf5 23. Qf6 1-0

[Event "FRG-chT qual corr"]
[Site "GER corr"]
[Date "1991.??.??"]
[Round "?"]
[White "Kroencke, Manfred"]
[Black "Nattkaemper, Stefan"]
[Result "1-0"]
[ECO "B51"]
[PlyCount "45"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "12"]
[EventCountry "GER"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Nc6 4. 0-0 Bd7 5. Re1 Nf6 6. c3 a6 7. Bxc6 Bxc6 8. d4 Bxe4 9. Bg5 Bd5 10. Nbd2 e6 11. c4 Bxf3 12. Qxf3 cxd4 13. Bxf6 gxf6 14. Qxb7 Bg7 15. Qc6+ Ke7 16. Qe4 Kf8 17. b4 f5 18. Qd3 Rg8 19. a4 Qg5 20. Qf3 Rb8 21. Ra2 Ke7 22. Qc6 Be5 23. g3 1-0

[Event "FRG-chT qual corr"]
[Site "GER corr"]
[Date "1991.??.??"]
[Round "?"]
[White "Nattkaemper, Stefan"]
[Black "Heppekausen, Jochen"]
[Result "0-1"]
[ECO "B99"]
[PlyCount "64"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "12"]
[EventCountry "GER"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. 0-0-0 Nbd7 10. g4 b5 11. Bxf6 Nxf6 12. g5 Nd7 13. f5 Bxg5+ 14. Kb1 Ne5 15. Qh5 Qd8 16. Nxe6 Bxe6 17. fxe6 g6 18. exf7+ Kxf7 19. Qh3 Kg7 20. Qe6 Nf7 21. h4 Bf6 22. h5 Qc8 23. h6+ Nxh6 24. Qxd6 Nf7 25. Qg3 Bxc3 26. bxc3 Rd8 27. Rxd8 Qxd8 28. e5 Qe7 29. Qh3 h5 30. e6 Ne5 31. Rg1 Ng4 32. Bg2 Rc8 0-1

[Event "FRG-chT qual corr"]
[Site "GER corr"]
[Date "1991.??.??"]
[Round "?"]
[White "Nattkaemper, Stefan"]
[Black "Von Wedel, Benno"]
[Result "0-1"]
[ECO "C16"]
[PlyCount "68"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "12"]
[EventCountry "GER"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Qd7 5. a3 Bf8 6. Nf3 b6 7. Bb5 c6 8. Ba4 Ba6 9. Ne2 Bb5 10. Bb3 c5 11. c3 Nc6 12. 0-0 Nge7 13. Re1 0-0-0 14. Bc2 Ng6 15. Ng3 Kb7 16. h4 h6 17. h5 Nge7 18. Be3 c4 19. Nh4 Rg8 20. Qg4 Na5 21. f4 f5 22. exf6 gxf6 23. Bg6 f5 24. Qe2 Nxg6 25. Nxg6 Bg7 26. Bf2 Rde8 27. Nf1 Bf6 28. Nd2 Ba4 29. Nf3 Qd8 30. Bh4 Bxh4 31. Nfxh4 Qf6 32. Kf2 Nc6 33. Rg1 Nd8 34. Raf1 Nf7 0-1

[Event "FRG-chT qual corr"]
[Site "GER corr"]
[Date "1991.??.??"]
[Round "?"]
[White "Nattkaemper, Stefan"]
[Black "Zaeske, Winfried"]
[Result "0-1"]
[ECO "B64"]
[PlyCount "58"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "12"]
[EventCountry "GER"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 Be7 8. 0-0-0 0-0 9. f4 h6 10. Bh4 e5 11. Nf5 Bxf5 12. exf5 exf4 13. Kb1 d5 14. Bxf6 Bxf6 15. Nxd5 Be5 16. Bc4 Qd6 17. Rhe1 Rfe8 18. Re4 Kf8 19. Rde1 Rad8 20. Qe2 Nd4 21. Qh5 Qc6 22. b3 b5 23. Nb4 Qc7 24. f6 Bxf6 25. Rxe8+ Rxe8 26. Rxe8+ Kxe8 27. Bxb5+ Kf8 28. Bc4 Qe7 29. Nd3 Ne2 0-1

[Event "FRG-chT qual corr"]
[Site "GER corr"]
[Date "1991.??.??"]
[Round "?"]
[White "Ulbricht, T."]
[Black "Nattkaemper, Stefan"]
[Result "0-1"]
[ECO "A91"]
[PlyCount "32"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "12"]
[EventCountry "GER"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 f5 2. c4 Nf6 3. Nc3 e6 4. g3 Be7 5. Bg2 0-0 6. Qb3 Nc6 7. d5 Ne5 8. dxe6 dxe6 9. Bf4 Nfd7 10. Rd1 Bf6 11. e4 Qe7 12. Nge2 Nc6 13. Bxc7 Nc5 14. Bd6 Nxb3 15. Bxe7 Bxe7 16. axb3 Na5 0-1

[Event "Dortmund op"]
[Site "Dortmund"]
[Date "1987.??.??"]
[Round "6"]
[White "Belcic, M."]
[Black "Nattkaemper, Stefan"]
[Result "1-0"]
[ECO "A13"]
[PlyCount "43"]
[EventDate "1987.04.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. Nf3 Nf6 2. b3 c5 3. Bb2 e6 4. e3 Be7 5. c4 d5 6. Qc2 dxc4 7. Bxc4 Nbd7 8. Ne5 Nxe5 9. Bxe5 Bd6 10. Bb5+ Ke7 11. f4 a6 12. Be2 b5 13. Bf3 Ra7 14. d3 Qb6 15. Bc3 Rc7 16. Qd2 b4 17. Bb2 Rd7 18. Qf2 Rhd8 19. Nd2 Bxf4 20. exf4 Rxd3 21. Nc4 Qc7 22. 0-0 1-0

[Event "Dortmund op"]
[Site "Dortmund"]
[Date "1987.??.??"]
[Round "4"]
[White "Birr, Beate"]
[Black "Nattkaemper, Stefan"]
[Result "1-0"]
[ECO "B19"]
[PlyCount "47"]
[EventDate "1987.04.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. h5 Bh7 8. Nf3 e6 9. Bd3 Bxd3 10. Qxd3 Nd7 11. Bd2 Ngf6 12. c4 Be7 13. 0-0-0 Qc7 14. Qe2 b5 15. cxb5 cxb5+ 16. Kb1 b4 17. Ne5 Qb7 18. f4 Nd5 19. Rc1 Bf6 20. Ne4 Be7 21. f5 N7f6 22. Nxf6+ Bxf6 23. fxe6 Bxe5 24. exf7+ 1-0

[Event "Dortmund op"]
[Site "Dortmund"]
[Date "1987.??.??"]
[Round "2"]
[White "Hamacher, Axel"]
[Black "Nattkaemper, Stefan"]
[Result "1-0"]
[ECO "D40"]
[PlyCount "67"]
[EventDate "1987.04.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. c4 c5 2. Nf3 Nc6 3. Nc3 Nf6 4. e3 e6 5. d4 cxd4 6. exd4 d5 7. Bd3 dxc4 8. Bxc4 Be7 9. 0-0 a6 10. Be3 0-0 11. Rc1 b5 12. Bd3 Bb7 13. Qe2 Nb4 14. Bb1 Nbd5 15. Ne4 Nxe3 16. Nxf6+ Bxf6 17. fxe3 Rc8 18. Rcd1 Qc7 19. Nd2 Qe7 20. Nb3 Bd5 21. Nc5 Bc4 22. Qc2 g6 23. Rfe1 Bd5 24. Qd2 Bb7 25. b4 Rfd8 26. Bc2 Qc7 27. Bb3 Qb6 28. Qf2 Bg7 29. Rf1 Rc7 30. Qh4 Rdc8 31. e4 h6 32. d5 Rxc5 33. bxc5 Qxc5+ 34. Kh1 1-0

[Event "Dortmund op"]
[Site "Dortmund"]
[Date "1987.??.??"]
[Round "1"]
[White "Hermaneck, Helmut"]
[Black "Nattkaemper, Stefan"]
[Result "1/2-1/2"]
[ECO "A39"]
[PlyCount "86"]
[EventDate "1987.04.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6 6. 0-0 0-0 7. d4 cxd4 8. Nxd4 Nxd4 9. Qxd4 d6 10. Qd3 Rb8 11. Rd1 Be6 12. Bf4 a6 13. c5 dxc5 14. Bxb8 Qxb8 15. Rac1 c4 16. Qf3 b5 17. Qb7 Qxb7 18. Bxb7 b4 19. Nd5 Nxd5 20. Bxd5 Rd8 21. Bxe6 Rxd1+ 22. Rxd1 fxe6 23. Rd2 a5 24. e4 a4 25. Rd8+ Kf7 26. Rc8 b3 27. axb3 cxb3 28. Ra8 Bxb2 29. Rxa4 Bc3 30. Ra7 b2 31. Rb7 Bd4 32. Kf1 g5 33. Ke2 h5 34. Kd3 e5 35. Kc2 h4 36. Rxb2 hxg3 37. fxg3 Bxb2 38. Kxb2 g4 39. Kc3 Ke6 40. Kc4 Kd6 41. Kb5 Kc7 42. Kc5 e6 43. Kb5 Kb7 1/2-1/2

[Event "Dortmund op"]
[Site "Dortmund"]
[Date "1987.??.??"]
[Round "7"]
[White "Nattkaemper, Stefan"]
[Black "Boldt, Dieter"]
[Result "1/2-1/2"]
[ECO "E62"]
[PlyCount "33"]
[EventDate "1987.04.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 c6 5. d4 d6 6. Nf3 0-0 7. 0-0 Bg4 8. h3 Bxf3 9. Bxf3 e5 10. dxe5 dxe5 11. Qc2 Qc7 12. Rd1 Nbd7 13. b3 Rac8 14. Bb2 Rfe8 15. Ne4 Nxe4 16. Bxe4 f5 17. Bg2 1/2-1/2

[Event "Dortmund op"]
[Site "Dortmund"]
[Date "1987.??.??"]
[Round "3"]
[White "Nattkaemper, Stefan"]
[Black "Jaeger, Frode Bull"]
[Result "1/2-1/2"]
[ECO "A22"]
[PlyCount "80"]
[EventDate "1987.04.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. g3 d6 4. Bg2 c6 5. Nf3 Be7 6. 0-0 0-0 7. d3 a5 8. a3 Nbd7 9. Rb1 Nh5 10. e4 Ndf6 11. h3 g6 12. Kh2 Ng7 13. Bh6 Kh8 14. d4 Qc7 15. dxe5 dxe5 16. Qe2 Ng8 17. Be3 a4 18. Rfd1 Ne6 19. Qc2 Nc5 20. Bxc5 Bxc5 21. Nxa4 Bxf2 22. Qxf2 Rxa4 23. Qe2 Be6 24. c5 Qe7 25. Nxe5 Bb3 26. Rd3 Ba2 27. Ra1 Qxe5 28. Rxa2 Qxc5 29. b4 Qe5 30. Qf2 Nf6 31. Qd4 Re8 32. Qb6 Re7 33. Rf2 Kg7 34. Rdf3 h5 35. Rxf6 Qxf6 36. Rxf6 Kxf6 37. Qd4+ Re5 38. Qd6+ Re6 39. Qd4+ Re5 40. Qd6+ Re6 1/2-1/2

[Event "Dortmund op"]
[Site "Dortmund"]
[Date "1987.??.??"]
[Round "5"]
[White "Nattkaemper, Stefan"]
[Black "Schulz, Michael"]
[Result "1-0"]
[ECO "A21"]
[PlyCount "63"]
[EventDate "1987.04.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Bb4 3. Qc2 Ne7 4. a3 Bxc3 5. Qxc3 d6 6. g3 0-0 7. Bg2 Nbc6 8. e3 f5 9. Ne2 Be6 10. b4 Qc8 11. Bb2 d5 12. b5 d4 13. exd4 Nxd4 14. Nxd4 exd4 15. Qxd4 Rf7 16. 0-0 c6 17. Rac1 b6 18. Qd6 Qd7 19. Qxd7 Bxd7 20. a4 Rc8 21. f4 c5 22. Rfe1 Kf8 23. d4 cxd4 24. Bxd4 g6 25. c5 bxc5 26. Bxc5 Ke8 27. Bxa7 Rf6 28. Rxc8+ Bxc8 29. Bc5 Re6 30. Rxe6 Bxe6 31. b6 Kd8 32. Bxe7+ 1-0

[Event "Dortmund op"]
[Site "Dortmund"]
[Date "1987.??.??"]
[Round "11"]
[White "Nattkaemper, Stefan"]
[Black "Sieberg, Rolf"]
[Result "1-0"]
[ECO "A34"]
[PlyCount "43"]
[EventDate "1987.04.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 0-0 5. e3 d6 6. Nge2 c5 7. 0-0 Qb6 8. b3 Bd7 9. d4 Bc6 10. d5 Bd7 11. Bb2 Qc7 12. h3 Qc8 13. Kh2 Na6 14. e4 Nc7 15. Qd2 b5 16. e5 dxe5 17. d6 exd6 18. Bxa8 Nxa8 19. cxb5 Bxh3 20. Rfe1 Rd8 21. Nd5 Be6 22. Ne7+ 1-0

[Event "Dortmund op"]
[Site "Dortmund"]
[Date "1987.??.??"]
[Round "8"]
[White "Nattkaemper, Stefan"]
[Black "Wittig, Wolfgang"]
[Result "0-1"]
[ECO "D35"]
[PlyCount "68"]
[EventDate "1987.04.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. cxd5 exd5 5. d4 c6 6. a3 Nbd7 7. Bg5 Be7 8. e3 Ne4 9. Bxe7 Qxe7 10. Bd3 f5 11. 0-0 0-0 12. g3 Qf6 13. Kg2 Re8 14. Be2 Ng5 15. Nxg5 Qxg5 16. Bh5 g6 17. Be2 h5 18. h4 Qh6 19. Rc1 Nf6 20. Bf3 Ne4 21. Bxe4 fxe4 22. Ne2 Bg4 23. Qc2 g5 24. hxg5 Qxg5 25. Qd2 Bf3+ 26. Kh2 Re7 27. Nf4 Rf8 28. Rg1 Kh8 29. b4 a6 30. Qc3 Rg8 31. Nh3 Qf6 32. Qd2 Reg7 33. Nf4 Qf5 34. Rce1 Qg4 0-1

[Event "Dortmund op"]
[Site "Dortmund"]
[Date "1987.??.??"]
[Round "9"]
[White "Radinger, Rudolf"]
[Black "Nattkaemper, Stefan"]
[Result "1-0"]
[ECO "B13"]
[PlyCount "75"]
[EventDate "1987.04.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 e6 5. c5 Nf6 6. b4 Be7 7. Nf3 0-0 8. Bf4 b6 9. Qc2 a5 10. b5 bxc5 11. dxc5 Nbd7 12. c6 Nb6 13. Bd3 Bd6 14. Bxd6 Qxd6 15. 0-0 e5 16. Bf5 e4 17. Nd4 Bxf5 18. Nxf5 Qe5 19. Ng3 d4 20. Na3 d3 21. Qb3 a4 22. Qb4 h5 23. Rfe1 Rfe8 24. Nc4 Nxc4 25. Qxc4 d2 26. Red1 h4 27. Nf1 Ng4 28. h3 e3 29. fxe3 Nxe3 30. Nxe3 Qxe3+ 31. Kh1 Qe1+ 32. Qf1 Qxf1+ 33. Rxf1 Re2 34. b6 Rae8 35. c7 Re1 36. Kh2 Rxf1 37. Rxf1 Kh7 38. Rd1 1-0

[Event "Dortmund op"]
[Site "Dortmund"]
[Date "1987.??.??"]
[Round "10"]
[White "Schuchardt, M."]
[Black "Nattkaemper, Stefan"]
[Result "1/2-1/2"]
[ECO "D20"]
[PlyCount "32"]
[EventDate "1987.04.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. e4 e5 4. d5 a6 5. Bxc4 b5 6. Bd3 Bb7 7. Nf3 Bd6 8. 0-0 Nf6 9. Bg5 h6 10. Bh4 0-0 11. a3 Re8 12. Nbd2 c6 13. dxc6 Nxc6 14. Qe2 Bc5 15. Rac1 Bb6 16. b4 Rc8 1/2-1/2

