[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2014.06.24"]
[Round "7"]
[White "Noordijk, Ed"]
[Black "Kettenis, John"]
[Result "1/2-1/2"]
[ECO "C00"]
[WhiteElo "1856"]
[BlackElo "1496"]
[PlyCount "87"]
[EventDate "2014.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e6 2. Nf3 d5 3. Qe2 dxe4 4. Qxe4 Nf6 5. Qa4+ c6 6. d4 Be7 7. Bd3 0-0 8. Bf4 Nbd7 9. c3 Nc5 10. Bxh7+ Nxh7 11. dxc5 Bxc5 12. 0-0 Qe7 13. Nbd2 b5 14. Qc2 Bb7 15. Ne4 Rae8 16. Rad1 Rd8 17. Nxc5 Qxc5 18. Be3 Qe7 19. b4 Rxd1 20. Rxd1 Ra8 21. Bc5 Qe8 22. Ne5 Nf6 23. g4 a6 24. g5 Nd5 25. Rd4 Rd8 26. Rh4 g6 27. Ng4 e5 28. Qe4 Qe6 29. Rh3 Bc8 30. Nh6+ Kg7 31. Rf3 Nf4 32. Rxf4 exf4 33. Bd4+ Kf8 34. Qxf4 Re8 35. Bc5+ Kg7 36. Be3 Re7 37. Qd4+ Kh7 38. Qd8 Re8 39. Qc7 Qd5 40. Nxf7 Qd1+ 41. Kg2 Qg4+ 42. Kf1 Qh3+ 43. Ke2 Qg4+ 44. Kf1 1/2-1/2

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2014.06.17"]
[Round "6"]
[White "Kettenis, John"]
[Black "Schenkelaars, Robin"]
[Result "0-1"]
[ECO "D05"]
[WhiteElo "1496"]
[BlackElo "1513"]
[PlyCount "91"]
[EventDate "2014.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. d4 e6 2. Nf3 d5 3. e3 Nf6 4. b3 c6 5. Bd3 Bd6 6. Bb2 Nbd7 7. 0-0 0-0 8. Nbd2 Qc7 9. c4 b6 10. Rc1 Bb7 11. g3 dxc4 12. Nxc4 c5 13. Nce5 Rac8 14. Qe2 Qb8 15. Bb5 Bxe5 16. dxe5 Bxf3 17. Qxf3 Nxe5 18. Qf4 Ng6 19. Qxb8 Rxb8 20. Rfd1 Rfd8 21. Rd3 Rxd3 22. Bxd3 Rd8 23. Rd1 Ng4 24. Kg2 Kf8 25. Be2 Rxd1 26. Bxd1 N4e5 27. Be2 f6 28. f4 Nf7 29. Ba3 a5 30. Bb2 Ke7 31. Kf3 Kd6 32. e4 e5 33. Bc4 Ke7 34. a3 exf4 35. gxf4 Nd6 36. Be2 Nf8 37. Bc3 Ne6 38. Ke3 Nc8 39. Bd3 Nc7 40. b4 axb4 41. axb4 g6 42. bxc5 bxc5 43. Ba5 Ne6 44. h4 Nd6 45. Be2 h6 46. Bg4 0-1

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2014.06.10"]
[Round "5"]
[White "Kettenis, John"]
[Black "Uittenbogaard, Rob"]
[Result "1-0"]
[ECO "D05"]
[WhiteElo "1496"]
[BlackElo "1600"]
[PlyCount "100"]
[EventDate "2014.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. e3 e6 4. Bd3 Nc6 5. b3 Be7 6. 0-0 Nb4 7. Bb5+ Bd7 8. Be2 c5 9. a3 Nc6 10. Bb2 cxd4 11. exd4 Rc8 12. Bd3 Qb6 13. Nbd2 Qc7 14. Rc1 Qf4 15. Re1 Bd6 16. g3 Qh6 17. Ne5 0-0 18. Rb1 Rc7 19. Ndf3 g6 20. Bc1 Qg7 21. c4 Bxe5 22. Nxe5 Ne8 23. Bb2 Nxe5 24. dxe5 Bc6 25. c5 Qh6 26. Bd4 Ng7 27. Be3 Qh3 28. Bf1 Qf5 29. Qd4 Qe4 30. Qxe4 dxe4 31. Bg5 Ne8 32. Bh6 Ng7 33. Bg2 f5 34. exf6 Rxf6 35. Bxe4 Bxe4 36. Rxe4 Rxc5 37. Rd1 Rc7 38. Rd8+ Kf7 39. Bf4 Rc2 40. Be5 Rfxf2 41. Rd7+ Ke8 42. Rxg7 Rxh2 43. g4 Rhd2 44. Kf1 Rf2+ 45. Ke1 Rg2 46. Kd1 Rcd2+ 47. Kc1 Rdf2 48. Re1 Rc2+ 49. Kb1 Rcf2 50. Rxh7 Rxg4 1-0

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2014.06.03"]
[Round "4"]
[White "Warmenhoven, Piet"]
[Black "Kettenis, John"]
[Result "1/2-1/2"]
[ECO "C02"]
[WhiteElo "1527"]
[BlackElo "1496"]
[PlyCount "98"]
[EventDate "2014.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 Nd7 4. f4 c5 5. c3 Ne7 6. Na3 a6 7. Nf3 Nf5 8. Nc2 Be7 9. Bd3 Nh4 10. Nxh4 Bxh4+ 11. g3 Be7 12. Qh5 c4 13. Be2 0-0 14. 0-0 f5 15. Ne3 Qe8 16. Qh3 Kh8 17. g4 g6 18. gxf5 gxf5 19. Bh5 Rg8+ 20. Kh1 Qf8 21. Bd2 Qh6 22. Rf3 Nf8 23. Rg3 Ng6 24. Rag1 Bd7 25. Ng2 Ba4 26. Bg4 Qxh3 27. Bxh3 Bc2 28. Ne1 Be4+ 29. Bg2 Bh4 30. Rh3 Bxg2+ 31. Nxg2 Be7 32. Be1 Rg7 33. Nh4 Rag8 34. Nxg6+ Rxg6 35. Rxg6 Rxg6 36. Bh4 Bf8 37. Bf6+ Kg8 38. Rg3 Rxg3 39. hxg3 h5 40. Kg2 Kh7 41. Kh3 Kg6 42. Kh4 b5 43. Bd8 b4 44. Ba5 bxc3 45. Bxc3 Be7+ 46. Kh3 Bd8 47. Bb4 a5 48. Bd6 a4 49. Bb4 Kf7 1/2-1/2

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2014.05.20"]
[Round "2"]
[White "Kettenis, John"]
[Black "De Weert, Chris WJ"]
[Result "0-1"]
[ECO "D05"]
[WhiteElo "1496"]
[BlackElo "1755"]
[PlyCount "62"]
[EventDate "2014.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 Nf6 3. e3 e6 4. Bd3 c5 5. b3 Nc6 6. a3 a6 7. c4 cxd4 8. exd4 dxc4 9. Bxc4 b5 10. Be2 Bb7 11. Bb2 Be7 12. 0-0 0-0 13. Nbd2 Rc8 14. Rc1 Qb6 15. Bd3 Rfd8 16. Qe2 Nd5 17. Bb1 Bf6 18. b4 Nxd4 19. Nxd4 Bxd4 20. Rxc8 Rxc8 21. Qd3 Bxb2 22. Qxh7+ Kf8 23. Qh8+ Ke7 24. Qh4+ Bf6 25. Qg3 Nc3 26. Bd3 Qd4 27. Nb3 Qe5 28. f4 Ne2+ 29. Bxe2 Qxe2 30. Re1 Qb2 31. Nc5 Bd4+ 0-1

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2014.05.13"]
[Round "1"]
[White "Van den Bosse, Bart"]
[Black "Kettenis, John"]
[Result "1/2-1/2"]
[ECO "D30"]
[WhiteElo "1786"]
[BlackElo "1496"]
[PlyCount "90"]
[EventDate "2014.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. e3 Nf6 4. Nf3 e6 5. Qc2 Bb4+ 6. Nbd2 Nbd7 7. a3 Be7 8. Bd3 dxc4 9. Nxc4 b5 10. Nce5 Nxe5 11. dxe5 Nd5 12. Qxc6+ Bd7 13. Qc2 Rc8 14. Qe2 a6 15. 0-0 0-0 16. Bd2 Bc6 17. Rac1 Qd7 18. Nd4 Rfd8 19. Ba5 Re8 20. f4 Bd8 21. Nxc6 Rxc6 22. Rxc6 Qxc6 23. Bd2 Bb6 24. Kh1 Rd8 25. Be4 Qd7 26. Bxd5 Qxd5 27. Bc3 Qd3 28. Qxd3 Rxd3 29. e4 Bd4 30. Bxd4 Rxd4 31. Rc1 g6 32. g3 Rxe4 33. Rc2 g5 34. Rf2 gxf4 35. gxf4 Re1+ 36. Kg2 Kg7 37. Kf3 Rc1 38. Rg2+ Kf8 39. Kg4 Rc4 40. h4 h6 41. Rd2 Ke7 42. Rf2 f6 43. exf6+ Kxf6 44. Kh5 Kg7 45. Rg2+ Kh7 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2013.07.02"]
[Round "7"]
[White "Kettenis, John"]
[Black "Verheijen, Jan"]
[Result "0-1"]
[ECO "B13"]
[PlyCount "50"]
[EventDate "2013.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. Nf3 c5 2. e3 Nc6 3. d4 cxd4 4. exd4 d5 5. a3 Nf6 6. Bd3 Bg4 7. Nbd2 Nxd4 8. h3 Bxf3 9. Nxf3 Nxf3+ 10. Qxf3 a6 11. 0-0 e6 12. Re1 Be7 13. Bf4 0-0 14. Rad1 Rc8 15. g4 Nd7 16. b4 Re8 17. Qg3 Bh4 18. Qg2 Qf6 19. Be3 Ne5 20. f4 Nxd3 21. cxd3 Bxe1 22. Rxe1 Rc3 23. Qf2 Rxd3 24. g5 Qf5 25. Qh4 d4 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2013.06.25"]
[Round "6"]
[White "Van den Biggelaar, Don"]
[Black "Kettenis, John"]
[Result "1/2-1/2"]
[ECO "D93"]
[PlyCount "89"]
[EventDate "2013.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. d4 d5 4. Nf3 Bg7 5. Bf4 c6 6. e3 0-0 7. Be2 Bf5 8. Bd3 Bxd3 9. Qxd3 Nbd7 10. 0-0 dxc4 11. Qxc4 Nh5 12. Bg5 h6 13. Bh4 g5 14. Bg3 Nxg3 15. fxg3 Rc8 16. Ne4 Nb6 17. Qd3 e5 18. Rad1 exd4 19. exd4 Qd5 20. Nc3 Qd7 21. Qc2 Nd5 22. Nxd5 Qxd5 23. b3 Rce8 24. Qd2 Re7 25. Rfe1 Rfe8 26. Rxe7 Rxe7 27. Ne5 Bxe5 28. dxe5 Qxe5 29. h3 Kg7 30. Qd4 Qxd4+ 31. Rxd4 b6 32. Kf2 f5 33. Rd6 c5 34. h4 Rf7 35. h5 f4 36. gxf4 Rxf4+ 37. Kg3 Rf7 38. a4 Rb7 39. Kg4 b5 40. axb5 Rxb5 41. Rd7+ Kf8 42. Rxa7 Rxb3 43. Rc7 Rb4+ 44. Kf5 c4 45. Rc6 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2013.06.18"]
[Round "5"]
[White "Kettenis, John"]
[Black "Verschoor, Marcel"]
[Result "0-1"]
[ECO "A47"]
[PlyCount "53"]
[EventDate "2013.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. e3 c5 4. b3 b6 5. Bd3 Bb7 6. Nbd2 Nc6 7. Bb2 Nb4 8. Be2 Rc8 9. a3 Nc6 10. 0-0 Be7 11. Rc1 0-0 12. c4 d5 13. Re1 Ba6 14. Ne5 Nxe5 15. dxe5 Ne8 16. Bg4 Bb7 17. Qe2 dxc4 18. Nxc4 Qc7 19. Red1 b5 20. Nd2 Qb6 21. Rc2 Nc7 22. Rdc1 Rfd8 23. Bf3 Rd7 24. Bxb7 Qxb7 25. Qg4 Rcd8 26. Ne4 Qxe4 27. Qxe4 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2013.06.11"]
[Round "4"]
[White "Wagemans, Ed"]
[Black "Kettenis, John"]
[Result "1-0"]
[ECO "B00"]
[PlyCount "81"]
[EventDate "2013.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 b6 2. d4 Bb7 3. Nf3 e6 4. Bd3 Nf6 5. Nc3 Bb4 6. 0-0 Bxc3 7. bxc3 Bxe4 8. Bxe4 Nxe4 9. Qd3 Nf6 10. Bg5 h6 11. Bh4 d6 12. c4 Nbd7 13. Rfe1 Qc8 14. h3 0-0 15. Rad1 Qa6 16. Qb3 c5 17. d5 e5 18. Nd2 Rab8 19. a4 Qc8 20. Re3 a6 21. Rf3 g5 22. Bg3 Qc7 23. Re1 Rb7 24. Rf5 Kg7 25. Qe3 Rg8 26. Qf3 Qd8 27. Ne4 Nxe4 28. Rxf7+ Kh8 29. Qxe4 Rg7 30. Qf5 Rxf7 31. Qxf7 Qf8 32. Qg6 Nf6 33. Re3 Rf7 34. Rb3 Rb7 35. a5 b5 36. cxb5 axb5 37. a6 Ra7 38. Rf3 Qg7 39. Qxf6 Qxf6 40. Rxf6 Rxa6 41. Bxe5 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2013.05.28"]
[Round "2"]
[White "Van Drunick, Jan Willem"]
[Black "Kettenis, John"]
[Result "1-0"]
[ECO "D97"]
[PlyCount "85"]
[EventDate "2013.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 0-0 7. e4 e6 8. Be2 Nbd7 9. Bg5 Nb6 10. Qb3 Qd7 11. 0-0 c6 12. Rac1 Qe8 13. Rfd1 Kh8 14. a4 h6 15. Bh4 Nh5 16. Ne5 Nf6 17. a5 Nbd7 18. Nc4 g5 19. Bg3 Rg8 20. Nd6 Qe7 21. e5 Ne8 22. Nce4 f5 23. exf6 Ndxf6 24. Nxc8 Rxc8 25. Nc5 Nd6 26. Be5 Nd5 27. Qh3 Bxe5 28. Qxh6+ Qh7 29. Qxh7+ Kxh7 30. Bd3+ Kh6 31. dxe5 Nf7 32. Bb1 Kg7 33. Nxe6+ Kh6 34. Nd4 Nxe5 35. Re1 Rce8 36. Nf5+ Kh5 37. h3 g4 38. hxg4+ Rxg4 39. Ng3+ Kh6 40. Re4 Rxe4 41. Bxe4 Nb4 42. Rd1 Nc4 43. Rd4 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2011.06.28"]
[Round "7"]
[White "Van der Bent, Fred"]
[Black "Kettenis, John"]
[Result "0-1"]
[ECO "C02"]
[WhiteElo "1204"]
[BlackElo "1494"]
[PlyCount "76"]
[EventDate "2011.05.17"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. Nf3 Nc6 5. Bb5 Bd7 6. Be3 cxd4 7. Bxd4 Nxe5 8. Bxd7+ Nxd7 9. Nc3 Ngf6 10. Qd3 a6 11. 0-0 Bd6 12. h3 0-0 13. Qe3 Qc7 14. g3 Rac8 15. a3 e5 16. Nxe5 Bxe5 17. Rfe1 Bxd4 18. Qxd4 Rfe8 19. Nxd5 Nxd5 20. Qxd5 Nf6 21. Qf3 b5 22. c3 Re7 23. Re3 Rxe3 24. Qxe3 Re8 25. Qf3 Qe5 26. Qc6 Qe6 27. Qb7 Qxh3 28. Qc6 Qe6 29. Qb7 h6 30. Rd1 Qc8 31. Qb6 Kh7 32. Qd4 Re6 33. Qd3+ g6 34. Qf3 Kg7 35. Qf4 Qe8 36. Kf1 Re2 37. b3 Rb2 38. b4 Qe2+ 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2011.06.21"]
[Round "6"]
[White "Kettenis, John"]
[Black "Van Randen, Fred"]
[Result "0-1"]
[ECO "A54"]
[WhiteElo "1494"]
[BlackElo "1878"]
[PlyCount "70"]
[EventDate "2011.05.17"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 d6 3. Nc3 Nc6 4. Nf3 e5 5. dxe5 Nxe5 6. Nxe5 dxe5 7. Qxd8+ Kxd8 8. Bg5 c6 9. 0-0-0+ Kc7 10. e4 Be6 11. f3 Nd7 12. Be2 Bc5 13. Bd3 f6 14. Bd2 Rhd8 15. Kc2 a5 16. f4 Bd4 17. f5 Bf7 18. g4 Nb6 19. b3 a4 20. Ra1 Rg8 21. h3 g6 22. Rhf1 g5 23. Rh1 h5 24. Be2 Rh8 25. Bf3 hxg4 26. Bxg4 Bh5 27. Kb2 Nd7 28. Bxh5 Rxh5 29. Rac1 Nc5 30. Kc2 axb3+ 31. axb3 Rah8 32. b4 Nd7 33. Be3 Rxh3 34. Rxh3 Rxh3 35. Bxd4 exd4 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2011.06.15"]
[Round "5"]
[White "Weiland, Harro"]
[Black "Kettenis, John"]
[Result "1-0"]
[ECO "D41"]
[WhiteElo "1865"]
[BlackElo "1494"]
[PlyCount "75"]
[EventDate "2011.05.17"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 e6 5. Bg2 Be7 6. d4 0-0 7. e4 Nxc3 8. bxc3 c5 9. Nf3 Nc6 10. 0-0 Rb8 11. Bf4 Ra8 12. Be3 Qa5 13. Qc2 cxd4 14. cxd4 Rd8 15. Rfd1 h6 16. h4 Qh5 17. Nh2 Qg6 18. Qe2 Bd7 19. h5 Qh7 20. Rab1 b6 21. d5 Ne5 22. f4 Ba4 23. fxe5 Bxd1 24. Rxd1 exd5 25. exd5 Rac8 26. d6 Bf8 27. Qd3 Qxd3 28. Rxd3 Rc2 29. Bd5 Re2 30. Bf4 Rc8 31. Bb3 a5 32. Nf1 Rd8 33. a4 Rd7 34. Bc4 Kh7 35. Bb5 Rd8 36. Rc3 g5 37. hxg6+ fxg6 38. Bxe2 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2011.06.07"]
[Round "4"]
[White "Kettenis, John"]
[Black "Vernooy, Daan"]
[Result "1-0"]
[ECO "D85"]
[WhiteElo "1494"]
[BlackElo "1613"]
[PlyCount "37"]
[EventDate "2011.05.17"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 c5 8. Bc4 0-0 9. 0-0 Nc6 10. Bb2 Bg4 11. e5 cxd4 12. cxd4 Rc8 13. Be2 Nb4 14. Ba3 Nd5 15. Bb2 a6 16. Rc1 Qb6 17. Qd2 Bh6 18. Qxh6 Qxb2 19. Ng5 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2011.06.01"]
[Round "3"]
[White "Zwetsloot, Piet"]
[Black "Kettenis, John"]
[Result "1-0"]
[ECO "E16"]
[WhiteElo "1806"]
[BlackElo "1494"]
[PlyCount "47"]
[EventDate "2011.05.17"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. c4 e6 2. Nf3 Nf6 3. g3 d5 4. Bg2 b6 5. 0-0 Bb7 6. d4 c5 7. cxd5 Bxd5 8. Nc3 Bb7 9. Bg5 Be7 10. dxc5 Qxd1 11. Rfxd1 Bxc5 12. Nb5 Na6 13. a3 0-0 14. Bxf6 gxf6 15. b4 Be7 16. Rd7 Bc6 17. Rxe7 Bxb5 18. Nd4 Rae8 19. Rxa7 Bc4 20. Rc1 e5 21. Nf5 Bxe2 22. Be4 Rc8 23. Rxc8 Rxc8 24. Ne7+ 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2011.05.17"]
[Round "1"]
[White "Kettenis, John"]
[Black "Erwich, Frans"]
[Result "0-1"]
[ECO "E16"]
[WhiteElo "1494"]
[BlackElo "1951"]
[PlyCount "86"]
[EventDate "2011.05.17"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 c5 3. g3 b6 4. e3 Bb7 5. Bg2 e6 6. c4 cxd4 7. exd4 d5 8. b3 Bb4+ 9. Bd2 Be7 10. 0-0 0-0 11. Nc3 dxc4 12. bxc4 Qc8 13. Qb3 Nc6 14. Ne2 Ne4 15. Qc2 Nxd2 16. Nxd2 Nb4 17. Qb3 Bxg2 18. Kxg2 Rd8 19. a3 Nc6 20. Nf3 Na5 21. Qd3 Qxc4 22. Qxc4 Nxc4 23. Rfc1 Nxa3 24. Rc7 Bd6 25. Rc6 Nb5 26. Rac1 Rab8 27. Rb1 Nc7 28. Nc3 f5 29. Nb5 Nxb5 30. Rxb5 h6 31. d5 e5 32. Nh4 Bc5 33. Nxf5 a6 34. Rb1 Rxd5 35. Rcxb6 Rxb6 36. Rxb6 Rd2 37. Rb8+ Kh7 38. Nh4 Rxf2+ 39. Kh3 e4 40. Ra8 e3 41. Rxa6 e2 42. Re6 Bb4 43. Ng2 Rxg2 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2010.06.29"]
[Round "7"]
[White "Kettenis, John"]
[Black "Kuiper, Cor"]
[Result "0-1"]
[ECO "D05"]
[WhiteElo "1537"]
[BlackElo "1137"]
[PlyCount "100"]
[EventDate "2010.05.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. e3 d5 4. Bd3 c5 5. b3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bb2 0-0 9. Nbd2 Qc7 10. 0-0 Re8 11. Ne5 Bd6 12. f4 g6 13. Qf3 Nd7 14. Qg4 Nf8 15. Rf3 f5 16. Qg5 Qg7 17. Rh3 Be7 18. Qg3 a6 19. Ndf3 Bf6 20. c3 Nd7 21. Re1 Ndxe5 22. dxe5 Be7 23. Ng5 Bxg5 24. Qxg5 b5 25. Ree3 Ra7 26. Bc1 Na5 27. Bc2 Rc7 28. Rd3 Nb7 29. b4 Nd8 30. Be3 Nf7 31. Qh4 Bb7 32. Bd4 Nd8 33. Rdg3 Nc6 34. Bb6 Rcc8 35. Bd1 Ne7 36. Qg5 Rc6 37. Bc5 d4 38. cxd4 Nd5 39. Rh6 Rc7 40. Rgh3 Rf7 41. Be2 Ne7 42. Bxe7 Rfxe7 43. Rc3 Rc8 44. Rhh3 Rec7 45. Rxc7 Qxc7 46. Qg3 Qc1+ 47. Kf2 Rc2 48. Qe3 Qb2 49. Rg3 Bd5 50. Ke1 Bc4 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2010.06.22"]
[Round "6"]
[White "Van Amsterdam, Jan"]
[Black "Kettenis, John"]
[Result "1-0"]
[ECO "C30"]
[WhiteElo "1776"]
[BlackElo "1537"]
[PlyCount "81"]
[EventDate "2010.05.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. f4 d6 4. Nf3 Nc6 5. Bb5 Bd7 6. d3 a6 7. Bxc6 Bxc6 8. fxe5 dxe5 9. Nxe5 Bc5 10. Nxc6 bxc6 11. Qf3 Qd4 12. Ne2 Qe5 13. Qf4 Qxf4 14. Bxf4 Bb6 15. Ng3 0-0 16. h3 Rfe8 17. 0-0-0 Rab8 18. c3 c5 19. Rhe1 Rb7 20. Bg5 Nd7 21. Nf5 f6 22. Bf4 g6 23. Ne3 c6 24. Nc4 Bc7 25. Bxc7 Rxc7 26. d4 Kf8 27. e5 fxe5 28. dxe5 Re6 29. Rd6 Ke7 30. Rxe6+ Kxe6 31. Kd2 Nf8 32. Rf1 Ke7 33. Ke3 Ne6 34. h4 Ng7 35. g4 Ne6 36. Nd6 Nd8 37. h5 gxh5 38. gxh5 Ke6 39. Ke4 Rd7 40. Rf6+ Ke7 41. Kf5 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2010.06.15"]
[Round "5"]
[White "Kettenis, John"]
[Black "Fakkert, Erwin"]
[Result "1/2-1/2"]
[ECO "D05"]
[WhiteElo "1537"]
[BlackElo "1709"]
[PlyCount "78"]
[EventDate "2010.05.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 e6 3. e3 Nf6 4. a3 Be7 5. Nbd2 0-0 6. Bd3 c5 7. b3 Bd7 8. Bb2 b5 9. Ne5 c4 10. Be2 Qc7 11. c3 Be8 12. 0-0 Nc6 13. f4 Ne4 14. Nxe4 dxe4 15. bxc4 Nxe5 16. fxe5 bxc4 17. Qe1 Ba4 18. Rc1 Rab8 19. Qd2 Rb6 20. Bd1 Bxd1 21. Rfxd1 Rfb8 22. Rc2 Qb7 23. Bc1 Rb3 24. Ra2 h6 25. g3 Qa6 26. a4 Qa5 27. Bb2 Qb6 28. Bc1 Rb1 29. Rf1 Qb3 30. Kg2 Rb7 31. Rf2 a5 32. Qc2 Qxc2 33. Rfxc2 R1b3 34. g4 g5 35. Kf2 Kg7 36. h3 Kg6 37. Bb2 Rb8 38. Kg3 Kg7 39. Rf2 Kg6 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2010.06.08"]
[Round "4"]
[White "Kettenis, John"]
[Black "Helfferich, Gert"]
[Result "1-0"]
[ECO "A48"]
[WhiteElo "1537"]
[BlackElo "1120"]
[PlyCount "63"]
[EventDate "2010.05.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 g6 2. Nf3 Bg7 3. e3 Nf6 4. Bd3 0-0 5. b3 Re8 6. Bb2 d5 7. Nbd2 Nc6 8. a3 Bg4 9. h3 Bxf3 10. Nxf3 Nd7 11. Bb5 e5 12. Bxc6 bxc6 13. dxe5 Nxe5 14. Nxe5 Bxe5 15. Bxe5 Rxe5 16. Qd4 Re4 17. Qd3 Qf6 18. 0-0 Rae8 19. Qa6 R8e5 20. Qxa7 Qh4 21. Qxc7 Rg5 22. Qh2 Rh5 23. a4 g5 24. Qg3 Rg4 25. Qxh4 Rgxh4 26. f3 f5 27. a5 g4 28. fxg4 fxg4 29. Rf4 gxh3 30. Rxh4 Rxh4 31. Ra4 h2+ 32. Kh1 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2010.06.01"]
[Round "3"]
[White "Bingen, Stanley"]
[Black "Kettenis, John"]
[Result "1-0"]
[ECO "C55"]
[WhiteElo "1245"]
[BlackElo "1537"]
[PlyCount "127"]
[EventDate "2010.05.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Bc4 Nc6 4. d3 d6 5. Nc3 Na5 6. b3 Nxc4 7. bxc4 c6 8. Bg5 Be7 9. Rb1 h6 10. Be3 0-0 11. 0-0 Qd7 12. c5 Qe6 13. cxd6 Bxd6 14. Qd2 Ng4 15. a4 Nxe3 16. fxe3 Qg6 17. Nh4 Qg5 18. Qf2 Bc5 19. Nd1 Bg4 20. Nf3 Qe7 21. Qg3 Bxf3 22. Rxf3 Rab8 23. Nf2 Qc7 24. Ng4 Kh7 25. d4 Be7 26. Nxe5 Bd6 27. Qh3 Kg8 28. Nd7 Bxh2+ 29. Kf2 Bd6 30. Nxb8 Rxb8 31. e5 Be7 32. Rg3 Bg5 33. Rh1 Qe7 34. Qg4 Qb4 35. Ra1 Qd2+ 36. Qe2 Qc3 37. Rb1 Bh4 38. Rb3 Qa5 39. Ra3 Qd8 40. Qg4 Bxg3+ 41. Kxg3 Qe7 42. Ra1 Qe6 43. Qf4 Qg6+ 44. Kf2 Qxc2+ 45. Kf3 Qg6 46. Rh1 Qe6 47. Qg3 Qf5+ 48. Qf4 Qxf4+ 49. exf4 Rd8 50. Ke4 Rd5 51. Rc1 Ra5 52. Ra1 b5 53. Kd3 Kf8 54. Kc3 Ke7 55. Kb4 Rxa4+ 56. Rxa4 bxa4 57. Kxa4 Ke6 58. Kb4 Kd5 59. Kc3 a5 60. g4 Ke4 61. f5 a4 62. e6 fxe6 63. fxe6 a3 64. Kb3 1-0

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2004.07.07"]
[Round "7"]
[White "Anink, Marco"]
[Black "Kettenis, John"]
[Result "1-0"]
[ECO "E39"]
[WhiteElo "1890"]
[BlackElo "1556"]
[PlyCount "49"]
[EventDate "2004.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 0-0 6. a3 Bxc3+ 7. Qxc3 Na6 8. b4 d5 9. cxd6 Qxd6 10. Bb2 Rd8 11. Nf3 b6 12. Qe5 Bb7 13. Qxd6 Rxd6 14. Nd4 Rad8 15. e3 Ne4 16. f3 Nf6 17. Be2 Nc7 18. 0-0-0 e5 19. Nf5 Rxd1+ 20. Rxd1 Rxd1+ 21. Bxd1 e4 22. Nd6 exf3 23. gxf3 Bc6 24. Nc8 b5 25. Ne7+ 1-0

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2004.06.23"]
[Round "5"]
[White "Kettenis, John"]
[Black "Van Dijk, Rens"]
[Result "1-0"]
[ECO "D26"]
[WhiteElo "1556"]
[BlackElo "1500"]
[PlyCount "41"]
[EventDate "2004.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. Nf3 e6 4. e3 Nf6 5. Bxc4 Bd6 6. Nc3 c6 7. h3 0-0 8. 0-0 b5 9. Bd3 Qc7 10. e4 Be7 11. e5 Nfd7 12. Qc2 g6 13. Bh6 Rd8 14. Qd2 Bb7 15. Rac1 Nb6 16. Bg5 Kg7 17. Nxb5 Qd7 18. Nd6 Nd5 19. Ne4 Bxg5 20. Qxg5 Na6 21. Nf6 1-0

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2004.06.09"]
[Round "4"]
[White "Kettenis, John"]
[Black "Zwaan, Gert Jan"]
[Result "1/2-1/2"]
[ECO "E91"]
[WhiteElo "1556"]
[PlyCount "76"]
[EventDate "2004.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 d6 3. Nf3 g6 4. Nc3 Bg7 5. e4 0-0 6. Be2 c5 7. d5 e6 8. h3 a6 9. a4 e5 10. 0-0 Ne8 11. Bd2 f5 12. Qc1 f4 13. Ne1 g5 14. f3 h6 15. Nd3 Bf6 16. b4 b6 17. bxc5 bxc5 18. a5 Rf7 19. Na4 Raa7 20. Qc2 Nd7 21. Rab1 Rb7 22. Rxb7 Bxb7 23. Rb1 Nf8 24. Nb6 Ng7 25. Nf2 h5 26. Rb3 h4 27. Ng4 Kh7 28. Qb1 Nh5 29. Nxf6+ Nxf6 30. Na4 Qc7 31. Rb6 Kg8 32. Bd1 Nh5 33. Nc3 Bc8 34. Ba4 Nd7 35. Bxd7 Rxd7 36. Na4 Rf7 37. Rb8 Kg7 38. Qb6 Qd7 1/2-1/2

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2004.06.02"]
[Round "3"]
[White "Van Baardewijk, Frans"]
[Black "Kettenis, John"]
[Result "1-0"]
[ECO "D16"]
[WhiteElo "1697"]
[BlackElo "1556"]
[PlyCount "29"]
[EventDate "2004.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 dxc4 4. a4 e6 5. e3 Bb4 6. Bxc4 Nf6 7. Nf3 Ne4 8. Qc2 Nd6 9. Bd3 Nd7 10. 0-0 Nf6 11. e4 Bxc3 12. bxc3 Ng8 13. Re1 Ne7 14. Ba3 Bd7 15. Bxd6 1-0

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2004.05.26"]
[Round "2"]
[White "Aalbers, Klaas"]
[Black "Kettenis, John"]
[Result "1-0"]
[ECO "B21"]
[WhiteElo "1780"]
[BlackElo "1556"]
[PlyCount "57"]
[EventDate "2004.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 d5 4. Qxd4 e6 5. exd5 Qxd5 6. Qxd5 exd5 7. Nf3 Nf6 8. Bd3 Be7 9. 0-0 0-0 10. h3 h6 11. Be3 Ne4 12. c4 Be6 13. Nd4 Nc5 14. Nxe6 fxe6 15. Bxc5 Bxc5 16. cxd5 exd5 17. Nc3 Rd8 18. Nxd5 Nc6 19. Bc4 Kf8 20. Nc7 Nd4 21. Nxa8 Rxa8 22. Rac1 b5 23. Bxb5 Nxb5 24. Rxc5 Nd4 25. Re1 Rb8 26. b3 Rb7 27. Re4 Rd7 28. Rc8+ Kf7 29. Rxd4 1-0

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2004.05.19"]
[Round "1"]
[White "Kettenis, John"]
[Black "Wagemans, Ed"]
[Result "1-0"]
[ECO "E91"]
[WhiteElo "1556"]
[BlackElo "1874"]
[PlyCount "60"]
[EventDate "2004.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 Nbd7 7. 0-0 c5 8. d5 a6 9. a4 b6 10. Bd2 Rb8 11. Rb1 Ng4 12. Qc1 Nde5 13. Nxe5 Nxe5 14. Bh6 f5 15. Bxg7 Kxg7 16. f4 Nf7 17. Bd3 Nh6 18. e5 dxe5 19. fxe5 Qc7 20. Qf4 Nf7 21. Rbe1 e6 22. d6 Qd7 23. h4 Bb7 24. Be2 h6 25. Bf3 Nd8 26. Bxb7 Rxb7 27. Ne4 Qxa4 28. Nf6 Nf7 29. Re3 b5 30. Qf3 Qxc4 1-0

