[Event "Kaiserbrunnen op 1st"]
[Site "Brakel"]
[Date "2003.10.31"]
[Round "4"]
[White "Bierbach, Utz Friedrich"]
[Black "Doerrenbach, Klaus"]
[Result "1/2-1/2"]
[ECO "E73"]
[WhiteElo "2024"]
[BlackElo "1924"]
[PlyCount "30"]
[EventDate "2003.07.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Bg5 c6 7. h4 Qa5 8. Bd2 Qb6 9. Bc1 Qa5 10. Qc2 h5 11. f3 c5 12. d5 e6 13. Bd2 Qb6 14. Bd3 exd5 15. exd5 Nbd7 1/2-1/2

[Event "Kaiserbrunnen op 1st"]
[Site "Brakel"]
[Date "2003.10.31"]
[Round "5"]
[White "Doerrenbach, Klaus"]
[Black "Aigner, Georg"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "1924"]
[BlackElo "2112"]
[PlyCount "59"]
[EventDate "2003.07.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 c5 3. e3 Bg4 4. Be2 e6 5. Ne5 Bxe2 6. Qxe2 Qc7 7. f4 Nf6 8. c3 Nbd7 9. Nd2 Bd6 10. 0-0 Nf8 11. e4 0-0-0 12. exd5 Nxd5 13. Nb3 Ng6 14. c4 Nde7 15. Nxf7 Bxf4 16. Qxe6+ Kb8 17. Bxf4 Nxf4 18. Rxf4 Ng6 19. Re4 cxd4 20. Nxh8 Rxh8 21. Qe8+ Qc8 22. Qxc8+ Kxc8 23. Nxd4 Rd8 24. Rae1 Kd7 25. Nb5 Kc6 26. b4 b6 27. Rd4 Rf8 28. Re6+ Kb7 29. Rd7+ Kb8 30. Rxa7 1-0

[Event "Kaiserbrunnen op 1st"]
[Site "Brakel"]
[Date "2003.10.31"]
[Round "6"]
[White "Doerrenbach, Klaus"]
[Black "Dorawa, Bernhard"]
[Result "1/2-1/2"]
[ECO "E38"]
[WhiteElo "1924"]
[BlackElo "2128"]
[PlyCount "49"]
[EventDate "2003.07.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Qc2 Nc6 6. a3 Qa5 7. Rb1 Bxc3+ 8. bxc3 d6 9. Nf3 Qc7 10. Bd3 b6 11. e4 e5 12. d5 Na5 13. Nh4 g6 14. f4 exf4 15. Bxf4 Nh5 16. Be3 Ba6 17. 0-0 0-0-0 18. Qe2 Qe7 19. Nf5 gxf5 20. Qxh5 Rd7 21. Qxf5 Bxc4 22. Bg5 Qe5 23. Qxe5 dxe5 24. Bxc4 Nxc4 25. a4 1/2-1/2

[Event "Kaiserbrunnen op 1st"]
[Site "Brakel"]
[Date "2003.10.31"]
[Round "3"]
[White "Doerrenbach, Klaus"]
[Black "Kloos, Gerhard"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "1924"]
[BlackElo "1657"]
[PlyCount "82"]
[EventDate "2003.07.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. cxd4 e6 6. Nf3 Nc6 7. a3 d6 8. Nc3 Nxc3 9. bxc3 d5 10. Bd3 Bd7 11. 0-0 Be7 12. h3 h5 13. a4 g5 14. Nh2 Qc7 15. f4 g4 16. hxg4 hxg4 17. Nxg4 0-0-0 18. f5 Rhg8 19. Nh6 Rg7 20. f6 Bxf6 21. Rxf6 Ne7 22. Be3 Be8 23. Rc1 Kb8 24. c4 Qa5 25. cxd5 Qxd5 26. Qf3 Qxf3 27. Rxf3 Bxa4 28. Be4 Bd7 29. d5 exd5 30. Bxd5 Bc6 31. Bxc6 Nxc6 32. Rxf7 Rxf7 33. Nxf7 Re8 34. Bc5 Ka8 35. Re1 b5 36. e6 b4 37. Nd6 Re7 38. Nf5 Re8 39. e7 b3 40. Ng7 Rxe7 41. Bxe7 Nxe7 1-0

[Event "Kaiserbrunnen op 1st"]
[Site "Brakel"]
[Date "2003.10.31"]
[Round "7"]
[White "Doerrenbach, Klaus"]
[Black "Neubert, Gerhard"]
[Result "1/2-1/2"]
[ECO "A44"]
[WhiteElo "1924"]
[BlackElo "2075"]
[PlyCount "114"]
[EventDate "2003.07.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. d4 c5 2. d5 e5 3. e4 d6 4. c4 a6 5. Nc3 Ne7 6. f4 exf4 7. Bxf4 Ng6 8. Bg3 Be7 9. Be2 Nd7 10. Nf3 0-0 11. Qc2 f6 12. 0-0 Nde5 13. Nxe5 Nxe5 14. h3 Bd7 15. a4 b6 16. Nd1 Qe8 17. Ne3 Qg6 18. Kh2 Qe8 19. Nf5 g6 20. Ne3 Rb8 21. b3 Rf7 22. Bxe5 fxe5 23. Rxf7 Qxf7 24. Rf1 Qg7 25. Bg4 Bg5 26. Bxd7 Qxd7 27. Ng4 Kg7 28. Qf2 Qe7 29. g3 h5 30. Ne3 b5 31. axb5 axb5 32. h4 Bh6 33. Nd1 bxc4 34. bxc4 Rb4 35. Nb2 Kg8 36. Qc2 Rb8 37. Nd3 Bg7 38. Rb1 Ra8 39. Qd2 Kh7 40. Qe2 Ra4 41. Qc2 Qa7 42. Nf2 Qa6 43. Nh3 Bf6 44. Rb3 Ra2 45. Rb2 Rxb2 46. Qxb2 Qxc4 47. Qb7+ Kh6 48. Nf2 Qd4 49. Kg2 c4 50. Qf7 Bg7 51. g4 Qd2 52. gxh5 Kh7 53. Qxg6+ Kg8 54. Qe6+ Kh7 55. Qf5+ Kh8 56. Qc8+ Kh7 57. Qxc4 Kh8 1/2-1/2

[Event "Kaiserbrunnen op 1st"]
[Site "Brakel"]
[Date "2003.10.31"]
[Round "1"]
[White "Doerrenbach, Klaus"]
[Black "Schwirz, Horst"]
[Result "1/2-1/2"]
[ECO "E90"]
[WhiteElo "1924"]
[BlackElo "1550"]
[PlyCount "56"]
[EventDate "2003.07.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 0-0 6. Nf3 e5 7. d5 Nbd7 8. Bd3 Nc5 9. Bc2 a5 10. Be3 Nh5 11. Qd2 f5 12. 0-0-0 fxe4 13. Nxe4 Nxe4 14. Bxe4 Nf6 15. Bc2 Bd7 16. Kb1 b5 17. c5 dxc5 18. Bxc5 Re8 19. d6 c6 20. Bb3+ Kh8 21. Ng5 Rf8 22. Nf7+ Rxf7 23. Bxf7 a4 24. a3 Ne4 25. Qe3 Qf8 26. Ba2 Bh6 27. f4 Bxf4 28. Qg1 Ng3 1/2-1/2

[Event "Kaiserbrunnen op 1st"]
[Site "Brakel"]
[Date "2003.10.31"]
[Round "2"]
[White "Grams, Arthur"]
[Black "Doerrenbach, Klaus"]
[Result "1/2-1/2"]
[ECO "D55"]
[WhiteElo "1707"]
[BlackElo "1924"]
[PlyCount "74"]
[EventDate "2003.07.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 Be7 5. Bg5 0-0 6. e3 c6 7. Ne5 Ne4 8. Nxe4 dxe4 9. Bxe7 Qxe7 10. c5 b6 11. b4 a5 12. a3 axb4 13. axb4 Rxa1 14. Qxa1 b5 15. h3 f6 16. Ng4 Na6 17. Qb1 h5 18. Nh2 f5 19. Be2 g6 20. 0-0 Nc7 21. f3 Nd5 22. fxe4 Nxe3 23. Rf3 Qg5 24. Rf2 Bd7 25. Nf3 Qg3 26. Qd3 Nc4 27. e5 Ra8 28. Qc3 Ra2 29. Qd3 Ra3 30. Qb1 Qf4 31. Bxc4 bxc4 32. Qb2 Rb3 33. Qa2 Rxb4 34. Qa8+ Kf7 35. Qd8 Rb1+ 36. Rf1 Qe3+ 37. Kh2 Rxf1 1/2-1/2

[Event "Kaiserbrunnen op 1st"]
[Site "Brakel"]
[Date "2003.10.31"]
[Round "8"]
[White "Romanow, Werner"]
[Black "Doerrenbach, Klaus"]
[Result "1-0"]
[ECO "B38"]
[WhiteElo "2080"]
[BlackElo "1924"]
[PlyCount "39"]
[EventDate "2003.07.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. Nf3 0-0 6. Be2 c5 7. 0-0 cxd4 8. Nxd4 Nc6 9. Nxc6 bxc6 10. Be3 Qa5 11. h3 Be6 12. Qd2 Nd7 13. Bd4 f6 14. Rac1 c5 15. Be3 f5 16. exf5 gxf5 17. Bh6 Rf7 18. Qe3 Ne5 19. Bxg7 Rxg7 20. f4 1-0

[Event "Wch Seniors 05th"]
[Site "Bad Liebenzell"]
[Date "1995.??.??"]
[Round "5"]
[White "Buerger, Helmut"]
[Black "Doerrenbach, Klaus"]
[Result "1/2-1/2"]
[ECO "D53"]
[PlyCount "48"]
[EventDate "1995.11.12"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 Nf6 5. Bg5 Be7 6. Bxf6 Bxf6 7. e3 Nd7 8. Bd3 dxc4 9. Bxc4 0-0 10. 0-0 e5 11. Qc2 exd4 12. Nxd4 Nb6 13. Bd3 g6 14. Nb3 Qe7 15. Ne4 Bg7 16. Rad1 Nd5 17. a3 Bg4 18. Rd2 Rfd8 19. Qc5 Qxc5 20. Nbxc5 a5 21. Nxb7 Rd7 22. Nbd6 Rad8 23. h3 Be6 24. Nc4 Nxe3 1/2-1/2

[Event "Wch Seniors 05th"]
[Site "Bad Liebenzell"]
[Date "1995.??.??"]
[Round "2"]
[White "Doerrenbach, Klaus"]
[Black "Braun, Gottfried"]
[Result "0-1"]
[ECO "B07"]
[BlackElo "2330"]
[PlyCount "82"]
[EventDate "1995.11.12"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 d6 2. Bc4 Nf6 3. Nc3 a6 4. a4 e6 5. Qe2 c5 6. f4 Nc6 7. Nf3 Be7 8. e5 dxe5 9. fxe5 Nd5 10. d3 0-0 11. Ne4 Qc7 12. Ng3 Rb8 13. c3 b5 14. axb5 axb5 15. Bb3 b4 16. c4 Nb6 17. 0-0 Bb7 18. Nh5 Nd7 19. Bf4 Ra8 20. Rxa8 Rxa8 21. Qf2 Nf8 22. Bg3 Ng6 23. Bc2 Nd8 24. h4 Qc6 25. Ng5 Bxg5 26. hxg5 Ne7 27. Bd1 Nf5 28. Bf4 Qd7 29. g4 Nd4 30. Be3 Qc6 31. Qh2 Ra1 32. Bxd4 cxd4 33. Ng3 Qc5 34. Ne2 Ra5 35. g6 hxg6 36. Qh4 Ra8 37. Rf2 Qxe5 38. Rh2 Qe3+ 39. Kf1 Kf8 40. Qh8+ Ke7 41. Qxg7 Ra1 0-1

[Event "Wch Seniors 05th"]
[Site "Bad Liebenzell"]
[Date "1995.??.??"]
[Round "7"]
[White "Doerrenbach, Klaus"]
[Black "Hau, Helge"]
[Result "1-0"]
[ECO "C10"]
[PlyCount "37"]
[EventDate "1995.11.12"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. Nf3 Nc6 2. e4 e6 3. d4 d5 4. Nc3 Bb4 5. e5 Bd7 6. a3 Bxc3+ 7. bxc3 h6 8. Bd3 Nge7 9. 0-0 0-0 10. Nh4 Nf5 11. Nxf5 exf5 12. Qh5 Ne7 13. a4 Kh7 14. g4 Ng8 15. gxf5 f6 16. e6 Be8 17. Qh3 Qc8 18. Ba3 Ne7 19. Bxe7 1-0

[Event "Wch Seniors 05th"]
[Site "Bad Liebenzell"]
[Date "1995.??.??"]
[Round "8"]
[White "Doerrenbach, Klaus"]
[Black "Krischok, Hilmar"]
[Result "1-0"]
[ECO "D25"]
[PlyCount "93"]
[EventDate "1995.11.12"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 d5 3. c4 dxc4 4. Nc3 Bg4 5. e3 e6 6. Bxc4 c5 7. Qa4+ Nbd7 8. Ne5 a6 9. dxc5 Bxc5 10. Nxg4 Nxg4 11. Bxe6 Ngf6 12. Bxd7+ Qxd7 13. Qxd7+ Nxd7 14. 0-0 0-0 15. Ne4 Rfd8 16. Bd2 Rac8 17. Bc3 f5 18. Ng5 Nf8 19. Rfd1 Be7 20. Nf3 Rxd1+ 21. Rxd1 Rd8 22. Rxd8 Bxd8 23. Kf1 Kf7 24. Ke2 Bf6 25. Bxf6 Kxf6 26. Nd4 Ke5 27. Kd3 b5 28. f3 g6 29. b4 Nd7 30. g3 Kd6 31. e4 Ne5+ 32. Ke3 Nc4+ 33. Kf4 fxe4 34. Kxe4 Nd2+ 35. Ke3 Nc4+ 36. Ke2 Kd5 37. Nb3 Ne5 38. Nc5 Kc4 39. Nxa6 Nc6 40. f4 Nd4+ 41. Ke3 Kd5 42. Kd3 Ne6 43. Nc5 Ng7 44. a4 Kc6 45. a5 Ne8 46. Ne6 h6 47. Nd4+ 1-0

[Event "Wch Seniors 05th"]
[Site "Bad Liebenzell"]
[Date "1995.??.??"]
[Round "3"]
[White "Mellenthin, Horst"]
[Black "Doerrenbach, Klaus"]
[Result "1/2-1/2"]
[ECO "D48"]
[PlyCount "82"]
[EventDate "1995.11.12"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. c4 d5 4. Nc3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. d5 exd5 11. e5 b4 12. exf6 bxc3 13. Qe2+ Be7 14. Qxe7+ Qxe7+ 15. fxe7 cxb2 16. Bxb2 f6 17. Rc1 c4 18. Bb1 Kxe7 19. 0-0 Bb7 20. Rfe1+ Kf7 21. Bf5 Nf8 22. Ba3 Re8 23. Rxe8 Kxe8 24. Rb1 g6 25. Bh3 Bc6 26. Rb8+ Kf7 27. Nd4 Ba4 28. Rd8 f5 29. Rxd5 Nd7 30. Ra5 Rb8 31. g3 Rb1+ 32. Bf1 Bb5 33. Nxb5 axb5 34. Ra7 Ke6 35. Rb7 Ne5 36. Kg2 Kd5 37. Rb6 Kd4 38. Be2 Nd3 39. Re6 Kc3 40. Bxd3 cxd3 41. Rc6+ Kd2 1/2-1/2

[Event "Wch Seniors 05th"]
[Site "Bad Liebenzell"]
[Date "1995.??.??"]
[Round "1"]
[White "Nopp, Josef"]
[Black "Doerrenbach, Klaus"]
[Result "0-1"]
[ECO "C00"]
[PlyCount "80"]
[EventDate "1995.11.12"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e6 2. Qe2 c5 3. g3 Nc6 4. Nf3 d6 5. Bg2 g6 6. 0-0 Bg7 7. c3 Nge7 8. b3 0-0 9. Bb2 Bd7 10. d4 cxd4 11. cxd4 d5 12. e5 Qb6 13. Qd2 Rac8 14. Nc3 Qb4 15. Rfd1 f6 16. Ne2 Qxd2 17. Rxd2 Bh6 18. Rc2 Nxe5 19. Rxc8 Nxf3+ 20. Bxf3 Rxc8 21. a4 Rc2 22. Bc1 Bxc1 23. Rxc1 Rxc1+ 24. Nxc1 b5 25. axb5 Bxb5 26. Be2 Bxe2 27. Nxe2 e5 28. Kf1 Kf7 29. Ke1 Nc6 30. dxe5 fxe5 31. Kd2 Ke6 32. f4 e4 33. Ke3 Kf5 34. h3 h5 35. Nc1 d4+ 36. Kd2 h4 37. gxh4 Kxf4 38. Ne2+ Kf3 39. Ke1 d3 40. Nc3 e3 0-1

[Event "Ost Westfalen Lippe-ch"]
[Site "Lemgo"]
[Date "1954.04.13"]
[Round "4"]
[White "Juehe, Heinrich"]
[Black "Doerrenbach, Klaus"]
[Result "1-0"]
[ECO "D02"]
[PlyCount "83"]
[EventDate "1954.04.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. Bf4 e6 4. e3 Bd6 5. Bg3 0-0 6. Bd3 b6 7. c3 Bb7 8. Nbd2 Ne4 9. Bxd6 cxd6 10. h4 f5 11. Qe2 Nd7 12. 0-0-0 a6 13. Rdg1 Rc8 14. g4 fxg4 15. Rxg4 Ndf6 16. Rg2 Rc7 17. Ng5 Qc8 18. Kb1 Kh8 19. f3 Nxd2+ 20. Qxd2 e5 21. Qc2 e4 22. fxe4 dxe4 23. Be2 Qe8 24. Qb3 Rd7 25. c4 b5 26. cxb5 Bd5 27. Qa3 Qb8 28. bxa6 Rc7 29. Nh3 Rfc8 30. Nf4 Rc3 31. Qa5 Rc2 32. Bb5 R2c3 33. Rgg1 Rc2 34. Rc1 Rxc1+ 35. Rxc1 Rxc1+ 36. Kxc1 Qc8+ 37. Qc3 Qb8 38. a4 Bf7 39. Qc6 h6 40. Qb7 Qd8 41. a7 Qa5 42. a8Q+ 1-0

[Event "Ost Westfalen Lippe-ch"]
[Site "Lemgo"]
[Date "1954.04.11"]
[Round "2"]
[White "Hecker, Erwin"]
[Black "Doerrenbach, Klaus"]
[Result "1/2-1/2"]
[ECO "A13"]
[PlyCount "60"]
[EventDate "1954.04.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 d5 2. c4 e6 3. g3 Nf6 4. Bg2 Bd6 5. Nc3 c6 6. b3 Nbd7 7. 0-0 e5 8. cxd5 cxd5 9. Nb5 Bb8 10. Ba3 Nb6 11. d4 a6 12. Nc3 e4 13. Ne5 Bd6 14. Qc1 0-0 15. Bxd6 Qxd6 16. f3 exf3 17. exf3 Be6 18. Qd2 Rac8 19. Rac1 Rc7 20. Ne2 Rfc8 21. Rxc7 Rxc7 22. Rc1 Nbd7 23. Rxc7 Qxc7 24. Nxd7 Nxd7 25. Qc3 Qxc3 26. Nxc3 Kf8 27. Kf2 Ke7 28. Bf1 Kd6 29. Bd3 g6 30. Ke3 Nb8 1/2-1/2

[Event "Ost Westfalen Lippe-ch"]
[Site "Lemgo"]
[Date "1954.04.10"]
[Round "1"]
[White "Doerrenbach, Klaus"]
[Black "Groenegress, Wilfried"]
[Result "1/2-1/2"]
[ECO "A45"]
[PlyCount "58"]
[EventDate "1954.04.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Bg5 Ne4 3. Bf4 d5 4. Nd2 Bf5 5. f3 Nxd2 6. Qxd2 e6 7. e3 Bd6 8. Bg3 Bxg3+ 9. hxg3 Qd6 10. Kf2 Nd7 11. Bd3 0-0-0 12. Rc1 Bxd3 13. Qxd3 h6 14. c4 dxc4 15. Qxc4 Nb6 16. Qc2 Rhe8 17. Ne2 Kb8 18. Nc3 c6 19. Ne4 Qe7 20. Qc5 e5 21. Qxe7 Rxe7 22. dxe5 Rxe5 23. Rhd1 Red5 24. Rxd5 Rxd5 25. Ke2 Kc7 26. Nc3 Rd7 27. Nb5+ Kb8 28. Nd4 Kc7 29. Nb5+ Kb8 1/2-1/2

[Event "Ost Westfalen Lippe-ch"]
[Site "Soest"]
[Date "1953.04.??"]
[Round "1"]
[White "Doerrenbach, Klaus"]
[Black "Hantke, Rolf"]
[Result "1/2-1/2"]
[ECO "D26"]
[PlyCount "47"]
[EventDate "1953.04.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. Nc3 c5 6. Nf3 Nc6 7. 0-0 cxd4 8. exd4 Be7 9. d5 exd5 10. Nxd5 Nxd5 11. Bxd5 0-0 12. Be3 Bf5 13. Rc1 Nb4 14. Bc4 a6 15. a3 Nc6 16. Qe2 Bf6 17. Rfd1 Qe7 18. Rd5 Bg4 19. h3 Bxf3 20. Qxf3 Ne5 21. Qe2 Nxc4 22. Rxc4 Rfd8 23. Rxd8+ Rxd8 24. Qc2 1/2-1/2

[Event "Ost Westfalen Lippe-ch"]
[Site "Soest"]
[Date "1953.04.??"]
[Round "6"]
[White "Doerrenbach, Klaus"]
[Black "Illgen, Hans"]
[Result "0-1"]
[ECO "E53"]
[PlyCount "66"]
[EventDate "1953.04.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 d5 5. Nf3 0-0 6. a3 Bxc3+ 7. bxc3 b6 8. cxd5 exd5 9. Bd3 Ba6 10. Bxa6 Nxa6 11. Qd3 Qc8 12. 0-0 c5 13. Bd2 c4 14. Qc2 Nc7 15. Ne5 Nb5 16. f3 Nd6 17. Be1 Nd7 18. Nxd7 Qxd7 19. e4 Rae8 20. Bg3 Nc8 21. Rae1 Ne7 22. Qb1 f5 23. Qc1 fxe4 24. fxe4 Rxf1+ 25. Kxf1 dxe4 26. Rxe4 Nd5 27. Rxe8+ Qxe8 28. Be5 Qf7+ 29. Ke1 Qg6 30. Qd2 b5 31. Kd1 Qb1+ 32. Ke2 Qa1 33. Qc2 Qxc3 0-1

[Event "Ost Westfalen Lippe-ch"]
[Site "Soest"]
[Date "1953.04.??"]
[Round "3"]
[White "Doerrenbach, Klaus"]
[Black "Kochan, Fritz"]
[Result "1/2-1/2"]
[ECO "D87"]
[PlyCount "38"]
[EventDate "1953.04.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 c5 7. Be3 Bg7 8. Bc4 0-0 9. Ne2 Nd7 10. 0-0 b6 11. Qb3 Bb7 12. f3 Qc7 13. Rac1 e5 14. Rfd1 Rad8 15. a4 Ba8 16. Qa2 Rde8 17. Bb5 Bc6 18. Bc4 Ba8 19. Bb5 Bc6 1/2-1/2

[Event "Ost Westfalen Lippe-ch"]
[Site "Soest"]
[Date "1953.04.??"]
[Round "4"]
[White "Doerrenbach, Klaus"]
[Black "Luigs, C."]
[Result "1-0"]
[ECO "D10"]
[PlyCount "47"]
[EventDate "1953.04.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 Bf5 5. Qb3 Bc8 6. e3 e6 7. Bd3 dxc4 8. Qxc4 Nbd7 9. 0-0 Be7 10. Rd1 0-0 11. Bc2 Nd5 12. e4 Nxc3 13. bxc3 g6 14. Qb3 b6 15. c4 Bf6 16. Bh6 Re8 17. e5 Bg7 18. Qe3 Bb7 19. Bxg7 Kxg7 20. Ng5 Qe7 21. Ne4 Rab8 22. Nd6 Red8 23. Qa3 a5 24. Nf5+ 1-0

[Event "Ost Westfalen Lippe-ch"]
[Site "Soest"]
[Date "1953.04.??"]
[Round "2"]
[White "Hoethker, Christian"]
[Black "Doerrenbach, Klaus"]
[Result "0-1"]
[ECO "D48"]
[PlyCount "62"]
[EventDate "1953.04.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. e3 e6 4. Nf3 Nf6 5. Nc3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. 0-0 c5 10. b3 Bb7 11. Bb2 Be7 12. Qe2 0-0 13. Rac1 Qb6 14. dxc5 Nxc5 15. Bb1 Rfd8 16. Rfd1 b4 17. Rxd8+ Rxd8 18. Nd1 Qd6 19. Bd4 Qd5 20. Nb2 Nfe4 21. Qc4 f6 22. Qxb4 Ng5 23. Bxc5 Nxf3+ 24. gxf3 Qxf3 25. e4 Qh5 26. Qc3 Bxc5 27. Qxc5 Qg4+ 28. Kf1 Qh3+ 29. Ke1 Rc8 30. Qxc8+ Bxc8 31. Rxc8+ Kf7 0-1

[Event "Ost Westfalen Lippe-ch"]
[Site "Soest"]
[Date "1953.04.??"]
[Round "5"]
[White "Juergens, Norbert"]
[Black "Doerrenbach, Klaus"]
[Result "0-1"]
[ECO "D45"]
[PlyCount "104"]
[EventDate "1953.04.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. cxd5 exd5 7. Bd3 Bd6 8. 0-0 0-0 9. Bd2 Re8 10. g3 Nf8 11. Ne1 Qd7 12. f3 Ne6 13. Bf5 Qe7 14. Nd3 Qc7 15. Ne2 g6 16. Bxe6 Bxe6 17. Ndf4 Bd7 18. Rc1 Qb6 19. Nd3 Bf5 20. Rc3 Bxd3 21. Rxd3 Qxb2 22. Rb3 Qxa2 23. Rxb7 Rab8 24. Nc3 Qa6 25. Rxb8 Rxb8 26. e4 Qd3 27. Bg5 Qxc3 28. Bxf6 Qe3+ 29. Kh1 dxe4 30. Re1 Qxf3+ 31. Qxf3 exf3 32. Kg1 Kf8 33. Kf2 Rb5 34. Ra1 Rf5 35. Bd8 Ke8 36. Ba5 g5 37. Bd2 Bb8 38. Ra6 Kd7 39. Bb4 Kc7 40. Bc5 Kb7 41. Ra3 g4 42. Rb3+ Kc8 43. Ra3 Kb7 44. Rb3+ Ka8 45. Ra3 h5 46. Re3 a5 47. Re8 Kb7 48. Re7+ Ka6 49. Re8 Bc7 50. Rc8 Kb7 51. Re8 Bb6 52. h3 Bxc5 0-1

