[Event "SUI-ch HT3"]
[Site "Lenzerheide"]
[Date "2010.07.14"]
[Round "5"]
[White "Overney, Luca"]
[Black "Koppen, Willem"]
[Result "1-0"]
[ECO "A80"]
[BlackElo "1601"]
[PlyCount "49"]
[EventDate "2010.07.10"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "SUI"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 f5 2. Nc3 Nf6 3. Bg5 e6 4. e4 Be7 5. exf5 exf5 6. Bc4 c6 7. Bxf6 Bxf6 8. d5 Bxc3+ 9. bxc3 Qe7+ 10. Qe2 Qxe2+ 11. Nxe2 cxd5 12. Bxd5 Nc6 13. 0-0 d6 14. Rab1 g6 15. Rfe1 Kd7 16. Nd4 Ne5 17. Bxb7 Bxb7 18. Rxb7+ Kc8 19. Reb1 Nc4 20. Ne6 Nb6 21. Rc7+ Kb8 22. Rf7 Kc8 23. Rd1 d5 24. c4 Re8 25. Nc7 1-0

[Event "SUI-ch HT3"]
[Site "Graechen"]
[Date "2009.07.16"]
[Round "6"]
[White "Luethi, Joachim"]
[Black "Koppen, Willem"]
[Result "0-1"]
[ECO "B01"]
[BlackElo "1564"]
[PlyCount "62"]
[EventDate "2009.07.11"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "SUI"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. Nf3 Bg4 5. Qe2 e6 6. Qb5+ Qxb5 7. Nxb5 Bd6 8. Nfd4 a6 9. Nxd6+ cxd6 10. Bc4 Ne7 11. a4 0-0 12. 0-0 Nec6 13. Nb3 Bf5 14. c3 d5 15. Be2 Nd7 16. d4 Rac8 17. Bf4 Rfe8 18. Rfe1 h6 19. Bf3 Bc2 20. Nd2 Nf6 21. Re3 Bf5 22. Rae1 Ng4 23. Bxg4 Bxg4 24. Nf1 Na5 25. Rg3 f5 26. h3 g5 27. Bd2 Bh5 28. Bxg5 Kh7 29. Bf6 Rc7 30. Ne3 f4 31. Nxd5 exd5 0-1

[Event "SUI-ch HT3"]
[Site "Graechen"]
[Date "2009.07.14"]
[Round "4"]
[White "Roelli, Xaver"]
[Black "Koppen, Willem"]
[Result "1-0"]
[ECO "A85"]
[BlackElo "1564"]
[PlyCount "65"]
[EventDate "2009.07.11"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "SUI"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 f5 2. e3 Nf6 3. c4 d6 4. Nc3 c6 5. Nf3 e6 6. Bd3 Be7 7. 0-0 0-0 8. Qc2 d5 9. Ne5 Nbd7 10. Nxd7 Bxd7 11. f3 Rc8 12. e4 g6 13. Bh6 Rf7 14. Rae1 Nh5 15. Qd2 Ng7 16. Qe3 g5 17. Bxg7 f4 18. Qe2 Rxg7 19. exd5 exd5 20. cxd5 Bf6 21. Rd1 Bxd4+ 22. Kh1 Be3 23. dxc6 bxc6 24. Bc4+ Kh8 25. Rd3 Qe7 26. Nd1 Bf5 27. Rb3 Qc5 28. Nxe3 fxe3 29. Rxe3 Bg6 30. b3 Rf8 31. Re1 h5 32. Qb2 Kh7 33. Re5 1-0

[Event "Zuerich Seniors op 07th"]
[Site "Zuerich"]
[Date "2009.01.28"]
[Round "3"]
[White "Hauser, Pius"]
[Black "Koppen, Willem"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "1642"]
[BlackElo "1561"]
[PlyCount "87"]
[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 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. Be2 c6 5. Nf3 Nf6 6. 0-0 e5 7. a3 Be6 8. d3 Qc7 9. Ng5 Bd7 10. b4 h6 11. Nge4 Be7 12. Bb2 Bf5 13. Ng3 Bh7 14. Bg4 Nbd7 15. Re1 Nxg4 16. Qxg4 Bf6 17. Nce4 Bxe4 18. Nxe4 0-0-0 19. Ra2 Rhg8 20. Nc5 Rge8 21. a4 Kb8 22. a5 Nxc5 23. bxc5 a6 24. Qe4 Rd5 25. d4 g6 26. f4 Bg7 27. fxe5 f5 28. Qf3 Re6 29. c4 Rd8 30. Bc3 Bf8 31. Rb2 Ka8 32. Rb6 Rde8 33. Kf1 Qf7 34. d5 cxd5 35. cxd5 Rxb6 36. cxb6 Bc5 37. Rc1 g5 38. Bb2 g4 39. Qd3 Bb4 40. Rc7 Qh5 41. Qc4 Kb8 42. Rxb7+ Kxb7 43. Qc7+ Ka8 44. Qa7# 1-0

[Event "Zuerich Seniors op 07th"]
[Site "Zuerich"]
[Date "2009.??.??"]
[Round "?"]
[White "Schnyder, Josef"]
[Black "Koppen, Willem"]
[Result "1-0"]
[ECO "A96"]
[BlackElo "1561"]
[PlyCount "73"]
[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. c4 f5 2. Nc3 Nf6 3. g3 d6 4. Bg2 c6 5. d4 e6 6. Nf3 Be7 7. 0-0 0-0 8. b3 d5 9. Bb2 Re8 10. e3 Bf8 11. Ne2 g6 12. h3 Bh6 13. Ne5 Nbd7 14. Nxd7 Nxd7 15. g4 fxg4 16. hxg4 Nf6 17. Bf3 Rf8 18. Kg2 Qc7 19. Rh1 Bg7 20. Rh4 Ne4 21. Bxe4 dxe4 22. Ng3 Bf6 23. Rh2 Qf7 24. Qe2 c5 25. Nxe4 cxd4 26. Nxf6+ Qxf6 27. Bxd4 e5 28. Bb2 Qc6+ 29. Kg3 e4 30. Rah1 Rf7 31. Ba1 Qc7+ 32. Kg2 Bd7 33. Qb2 Kf8 34. Rxh7 Bxg4 35. Qh8+ Ke7 36. Rxf7+ Ke6 37. Qf6# 1-0

[Event "SUI-ch HT3"]
[Site "Samnaun"]
[Date "2008.07.17"]
[Round "6"]
[White "Kappeler, Peter"]
[Black "Koppen, Willem"]
[Result "1/2-1/2"]
[ECO "A95"]
[PlyCount "50"]
[EventDate "2008.07.12"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "SUI"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 f5 2. Nf3 Nf6 3. g3 e6 4. Bg2 Be7 5. 0-0 0-0 6. c4 c6 7. Nc3 d5 8. cxd5 Nxd5 9. Nxd5 Qxd5 10. b3 Qd8 11. e3 Bf6 12. Ne5 Nd7 13. f4 g6 14. Ba3 Be7 15. Bxe7 Qxe7 16. Rc1 Nxe5 17. dxe5 Rb8 18. Re1 Rd8 19. Qc2 Bd7 20. e4 Be8 21. exf5 gxf5 22. Red1 Bh5 23. Rxd8+ Rxd8 24. Bf1 Bf3 25. Be2 Be4 1/2-1/2

[Event "SUI-ch HT3"]
[Site "Samnaun"]
[Date "2008.07.16"]
[Round "5"]
[White "Koppen, Willem"]
[Black "Ledermann, Rafael"]
[Result "1-0"]
[ECO "A45"]
[PlyCount "71"]
[EventDate "2008.07.12"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "SUI"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. f4 Nf6 2. Nf3 g6 3. e3 Bg7 4. d4 d6 5. Be2 0-0 6. 0-0 Nc6 7. c3 Nd7 8. Bd3 Re8 9. d5 Ncb8 10. Bc2 c6 11. Bb3 Nf6 12. dxc6 Nxc6 13. Ng5 e6 14. Nd2 d5 15. Ndf3 h6 16. Nh3 e5 17. fxe5 Nxe5 18. Nxe5 Bxh3 19. gxh3 Rxe5 20. e4 Qb6+ 21. Qd4 Qxd4+ 22. cxd4 Rxe4 23. Bxh6 Bxh6 24. Rxf6 Be3+ 25. Kg2 Bxd4 26. Rf3 Re2+ 27. Kf1 Rxb2 28. Rd1 Bb6 29. Bxd5 Rf8 30. Bb3 Rxh2 31. Rd7 Rh1+ 32. Kg2 Rg1+ 33. Kh2 Rc8 34. Rfxf7 Rcc1 35. Rg7+ Kf8 36. Rdf7+ 1-0

[Event "Winterthur op"]
[Site "Winterthur"]
[Date "2006.10.06"]
[Round "1"]
[White "Wyss, Jonas"]
[Black "Koppen, Willem"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "2089"]
[PlyCount "71"]
[EventDate "2006.10.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SUI"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 c6 5. Nf3 Qc7 6. Bc4 Bg4 7. Bxf7+ Kd8 8. h3 e6 9. Ng5 Bxd1 10. Nxe6+ Kd7 11. Nxc7 Kxc7 12. Bf4+ Bd6 13. Bxd6+ Kxd6 14. Rxd1 Nf6 15. 0-0 Na6 16. d5 Nc7 17. dxc6+ Kxc6 18. Bb3 b5 19. Rfe1 Rhe8 20. Kf1 Rab8 21. Rxe8 Rxe8 22. Re1 a5 23. Rxe8 Ncxe8 24. Ke2 Kc5 25. Kd3 Nd6 26. f3 a4 27. Be6 Nc4 28. Bxc4 bxc4+ 29. Ke3 Kb4 30. a3+ Ka5 31. Kd4 Nh5 32. Ne2 Kb5 33. g4 Nf6 34. Nc3+ Ka5 35. Kxc4 Nd7 36. f4 1-0

[Event "SUI-ch HT3"]
[Site "Switzerland"]
[Date "2001.??.??"]
[Round "3"]
[White "Mazzoni, Renzo"]
[Black "Koppen, Willem"]
[Result "1-0"]
[ECO "B22"]
[PlyCount "91"]
[EventDate "2001.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "SUI"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nc6 3. d4 e6 4. Nf3 h6 5. Bd3 Be7 6. 0-0 a6 7. a3 Nf6 8. b4 cxd4 9. cxd4 d6 10. h3 Bd7 11. Nbd2 Rc8 12. Bb2 0-0 13. Rc1 Na7 14. Qe2 Nh5 15. Rxc8 Nxc8 16. g3 Nb6 17. Nh2 Nf6 18. e5 dxe5 19. dxe5 Nh7 20. Bxh7+ Kh8 21. Bd3 Bc6 22. Ne4 Qd5 23. Rd1 Rd8 24. Bc2 Bb5 25. Rxd5 Bxe2 26. Rxd8+ Bxd8 27. Nd6 Kg8 28. Nxb7 Bc7 29. Bb3 Nd7 30. f4 a5 31. Bd4 axb4 32. axb4 Nb6 33. Kf2 Ba6 34. Nd6 Bd3 35. Nf3 Nd5 36. Bxd5 exd5 37. Ke3 Bf1 38. h4 Bh3 39. b5 f6 40. b6 Bb8 41. Nd2 Bd7 42. Nb3 Kf8 43. Nc5 Bc6 44. Na6 Bxd6 45. exd6 Ke8 46. Nc5 1-0

[Event "Zuerich op-A 21th"]
[Site "Zuerich"]
[Date "1997.??.??"]
[Round "?"]
[White "Koppen, Willem"]
[Black "Bucher, Michael"]
[Result "0-1"]
[ECO "A80"]
[PlyCount "70"]
[EventDate "1997.12.26"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "SUI"]
[SourceTitle "CBM 062 Extra"]
[Source "ChessBase"]
[SourceDate "1998.03.09"]
[SourceVersion "1"]
[SourceVersionDate "1998.03.09"]
[SourceQuality "1"]

1. Nf3 f5 2. d4 Nf6 3. Bg5 e6 4. c3 Be7 5. Nbd2 b6 6. e3 Bb7 7. Be2 0-0 8. a3 Ne4 9. Bxe7 Qxe7 10. 0-0 d6 11. c4 Nd7 12. Nb3 Rf6 13. Ne1 Rh6 14. Nf3 Rf8 15. c5 dxc5 16. dxc5 Ndxc5 17. Nxc5 Nxc5 18. Bc4 g5 19. b4 g4 20. bxc5 gxf3 21. g3 Qe8 22. Qd4 Qh5 23. h4 Rg6 24. Kh2 Qh6 25. cxb6 Rg4 26. Bxe6+ Qxe6 27. Qc3 cxb6 28. Rfd1 Qe7 29. Kh3 Qe4 30. Rd4 Qe6 31. Rad1 Rxd4 32. Rxd4 f4+ 33. g4 fxe3 34. Qd3 exf2 35. Qf1 Qe2 0-1

[Event "Zuerich op-B 19th"]
[Site "Zuerich"]
[Date "1995.??.??"]
[Round "?"]
[White "Koppen, Willem"]
[Black "Svabic, T."]
[Result "0-1"]
[ECO "A81"]
[PlyCount "70"]
[EventDate "1995.12.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "SUI"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 f5 3. g3 Nf6 4. Bg2 e6 5. Bg5 Be7 6. 0-0 0-0 7. c3 Nbd7 8. Re1 c6 9. Nbd2 Ne4 10. Bxe7 Qxe7 11. e3 b6 12. Ne5 Bb7 13. Nxd7 Qxd7 14. Nf3 Rf6 15. Ne5 Qc7 16. Bxe4 fxe4 17. Qg4 Raf8 18. Re2 c5 19. Rd1 cxd4 20. Rxd4 Qxe5 21. Ra4 a5 22. Rd4 Bc8 23. Qh3 Qc7 24. Qg2 Ba6 25. Red2 Bd3 26. h3 b5 27. Kh2 Qc6 28. Qg1 e5 29. R4xd3 exd3 30. Qe1 e4 31. Kg2 h5 32. Qd1 Rf3 33. a3 Qe6 34. Qb3 h4 35. g4 Qf7 0-1

