[Event "Zuerich Seniors op 07th"]
[Site "Zuerich"]
[Date "2009.02.03"]
[Round "7"]
[White "Zweifel, Heinz"]
[Black "Zuercher, Ulrich"]
[Result "0-1"]
[ECO "B58"]
[WhiteElo "1504"]
[BlackElo "1659"]
[PlyCount "58"]
[EventDate "2009.01.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SUI"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nc6 5. Be3 Bd7 6. Nc3 Nf6 7. Be2 Nxd4 8. Bxd4 e5 9. Be3 Be7 10. h3 0-0 11. 0-0 Bc6 12. Nd5 Nxd5 13. exd5 Bd7 14. c4 Bg5 15. Bd3 f5 16. f4 exf4 17. Bxf4 Bxf4 18. Rxf4 Qg5 19. Qf3 g6 20. Rf1 Rae8 21. g3 Qf6 22. b3 g5 23. Bxf5 gxf4 24. Qg4+ Kh8 25. Bxd7 Qd4+ 26. Kh2 Re3 27. Rxf4 Rxf4 28. Qxf4 Qd2+ 29. Qf2 Re2 0-1

[Event "Zuerich Seniors op 07th"]
[Site "Zuerich"]
[Date "2009.01.29"]
[Round "4"]
[White "Briggen, Franz"]
[Black "Zweifel, Heinz"]
[Result "1-0"]
[ECO "C50"]
[PlyCount "65"]
[EventDate "2009.01.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SUI"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Nc3 Nf6 5. d3 h6 6. 0-0 Qe7 7. Re1 d6 8. h3 Be6 9. Nd5 Qd8 10. c3 Na5 11. Qa4+ Nc6 12. Bb5 Nxd5 13. Bxc6+ Bd7 14. Bxd7+ Qxd7 15. Qxd7+ Kxd7 16. exd5 Rae8 17. d4 exd4 18. Bd2 dxc3 19. Bxc3 f6 20. b4 Bb6 21. Bd4 c5 22. dxc6+ bxc6 23. Bxb6 axb6 24. Kf1 Ra8 25. a3 Ra4 26. Nd4 c5 27. Nc2 c4 28. Re3 Rc8 29. Rae1 Raa8 30. Re7+ Kc6 31. Rxg7 d5 32. Nd4+ Kd6 33. Re6# 1-0

[Event "Zuerich Seniors op 2nd"]
[Site "Zuerich"]
[Date "2004.??.??"]
[Round "?"]
[White "Zweifel, Heinz"]
[Black "Treichler, Peter"]
[Result "0-1"]
[ECO "B33"]
[BlackElo "1650"]
[PlyCount "67"]
[EventDate "2004.01.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SUI"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb3 Nf6 6. Nc3 Bb4 7. f3 Bxc3+ 8. bxc3 0-0 9. Bg5 h6 10. Bh4 Re8 11. Bc4 g5 12. Bf2 a5 13. a4 Qc7 14. h4 Ne7 15. Qd2 Qxc4 16. hxg5 Nxe4 17. fxe4 Qxe4+ 18. Kf1 Qc4+ 19. Kg1 Ng6 20. Nc5 Qf4 21. Be3 Qg4 22. Rxh6 b6 23. Nd3 Kg7 24. Qf2 Qe6 25. Rf1 Rh8 26. Qf6+ Qxf6 27. gxf6+ Kg8 28. Rf5 Rxh6 29. Bxh6 d6 30. Ne1 Bxf5 31. Nf3 Kh7 32. Be3 Rb8 33. Kf2 Bxc2 34. Ng5+ 0-1

[Event "Biel ATO op"]
[Site "Biel"]
[Date "2003.??.??"]
[Round "6"]
[White "Zweifel, Heinz"]
[Black "Kaelber, Manuela"]
[Result "1-0"]
[ECO "B32"]
[PlyCount "69"]
[EventDate "2003.07.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SUI"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 e6 4. a3 g6 5. Be3 cxd4 6. Nxd4 Bg7 7. Nc3 Nf6 8. Be2 0-0 9. 0-0 d5 10. f3 Re8 11. Qd2 Qc7 12. Rad1 Nxd4 13. Bxd4 e5 14. Bf2 d4 15. Nb1 Bd7 16. c3 dxc3 17. Nxc3 a6 18. Bh4 Re6 19. Bxf6 Qb6+ 20. Kh1 Bxf6 21. Qxd7 Rd8 22. Qa4 Qxb2 23. Rxd8+ Bxd8 24. Qb4 Qd2 25. Rd1 Qg5 26. Qxb7 Kg7 27. Bc4 Re7 28. Qxa6 Qe3 29. Nd5 Qc5 30. Nxe7 Bxe7 31. h3 Qf2 32. Qb7 Qc2 33. Qb3 Qxb3 34. Bxb3 Bxa3 35. Rd7 1-0

[Event "SUI-ch Seniors"]
[Site "Switzerland"]
[Date "2001.??.??"]
[Round "1"]
[White "Denzinger, Karl"]
[Black "Zweifel, Heinz"]
[Result "0-1"]
[ECO "B93"]
[PlyCount "92"]
[EventDate "2001.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SUI"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be3 g6 7. Be2 Bg7 8. 0-0 a6 9. f4 0-0 10. Bf3 Bd7 11. Qe2 Rc8 12. Rad1 b5 13. Nxc6 Bxc6 14. e5 Ne8 15. Ne4 Qc7 16. exd6 exd6 17. c3 Rd8 18. Qf2 Qb7 19. Nc5 Qc8 20. Bxc6 Qxc6 21. Nb3 Nf6 22. Bd4 Qc4 23. Bb6 Rd7 24. Qf3 Re8 25. Rfe1 Rxe1+ 26. Rxe1 Nd5 27. Re8+ Bf8 28. Bd4 Re7 29. Rxe7 Nxe7 30. h3 Qa4 31. Qd3 Qxa2 32. Qc2 Bg7 33. Bxg7 Kxg7 34. Nd4 Qd5 35. g4 Nc6 36. Qd3 Nxd4 37. Kf2 Qc4 38. Qxc4 bxc4 39. cxd4 d5 40. Ke3 Kf6 41. h4 a5 42. Kd2 h5 43. gxh5 gxh5 44. Kc3 Kf5 45. b3 cxb3 46. Kxb3 Kxf4 0-1

[Event "SUI-ch Seniors"]
[Site "Switzerland"]
[Date "2001.??.??"]
[Round "3"]
[White "Studer, Kurt"]
[Black "Zweifel, Heinz"]
[Result "1-0"]
[ECO "B30"]
[PlyCount "63"]
[EventDate "2001.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SUI"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 Qb6 4. Bxc6 Qxc6 5. d3 d6 6. h3 g6 7. Nc3 Bg7 8. Bd2 b5 9. Rb1 b4 10. Ne2 Bb7 11. b3 Qc7 12. 0-0 Rd8 13. c4 e6 14. Qc2 Ne7 15. Bc1 0-0 16. Bb2 Bh6 17. Bf6 Rd7 18. g4 d5 19. g5 Bg7 20. Ne5 Rd6 21. Ng4 Bxf6 22. gxf6 Nc8 23. Qc1 Kh8 24. e5 Rdd8 25. Qg5 dxc4 26. dxc4 Bf3 27. Nf4 Bxg4 28. hxg4 Qc6 29. Rbe1 Rd4 30. Re3 Nd6 31. Qh6 Rg8 32. Rh3 1-0

[Event "SUI-ch Seniors"]
[Site "Switzerland"]
[Date "2001.??.??"]
[Round "2"]
[White "Zweifel, Heinz"]
[Black "Rickenbach, Jakob"]
[Result "0-1"]
[ECO "B73"]
[PlyCount "64"]
[EventDate "2001.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SUI"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. 0-0 0-0 9. f4 Bd7 10. h3 a6 11. Bf3 Rc8 12. Qd2 Qc7 13. Rad1 Rfd8 14. g4 Nxd4 15. Bxd4 Bc6 16. Rfe1 b5 17. Qe3 Qb7 18. a3 e6 19. Rf1 Ne8 20. Bxg7 Nxg7 21. h4 b4 22. axb4 Qxb4 23. b3 f5 24. Rd4 Qb6 25. e5 Bxf3 26. Rxf3 fxg4 27. Rxd6 Rxd6 28. exd6 Qxd6 29. Rf2 Nf5 30. Ne4 Qd1+ 31. Rf1 Qxf1+ 32. Kxf1 Nxe3+ 0-1

[Event "Zuerich op-B 23th"]
[Site "Zuerich"]
[Date "1999.12.27"]
[Round "2"]
[White "Zweifel, Heinz"]
[Black "Steiger, Peter"]
[Result "0-1"]
[ECO "B72"]
[PlyCount "56"]
[EventDate "1999.12.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "SUI"]
[EventCategory "2"]
[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 d6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nf6 8. f4 0-0 9. Qd2 Bd7 10. h3 a6 11. g4 b5 12. a3 Qa5 13. Nb3 Qc7 14. Rg1 Rfd8 15. f5 Ne5 16. Bh6 Qb6 17. 0-0-0 Bc6 18. Bxg7 Kxg7 19. Qf4 b4 20. Nd5 Bxd5 21. exd5 bxa3 22. bxa3 Rac8 23. Rg3 Qb7 24. Na5 Qc7 25. Qd2 Ne4 26. Rc3 Nxc3 27. Rf1 Qxa5 28. Qd4 Nxe2+ 0-1

