[Event "NED-chT 1718"]
[Site "Netherlands"]
[Date "2018.02.03"]
[Round "6.2"]
[White "Ikonnikov, Vyacheslav"]
[Black "Sipkema, Willem"]
[Result "1-0"]
[ECO "E15"]
[WhiteElo "2526"]
[BlackElo "1845"]
[PlyCount "111"]
[EventDate "2017.09.16"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "En Passant"]
[BlackTeam "SISSA"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb4+ 6. Bd2 Bxd2+ 7. Qxd2 d5 8. Bg2 Ne4 9. Qf4 0-0 10. 0-0 Nd7 11. Nfd2 Nxd2 12. Nxd2 Nf6 13. Rac1 Rc8 14. e4 Nxe4 15. Nxe4 dxe4 16. Bxe4 Qd6 17. Qh4 g6 18. Rfd1 Rcd8 19. Bf3 Qa3 20. Qf6 Rfe8 21. h4 Qe7 22. Qe5 Qd6 23. Qg5 Qe7 24. Bc6 Qxg5 25. hxg5 Rf8 26. b4 Bc8 27. c5 Bd7 28. Bf3 Bb5 29. d5 exd5 30. Rxd5 Rxd5 31. Bxd5 Rd8 32. Bb3 Rd7 33. f4 Kg7 34. Kf2 Rd2+ 35. Ke3 Re2+ 36. Kf3 Rd2 37. cxb6 cxb6 38. Rc7 Rd7 39. Rxd7 Bxd7 40. Ke4 Kf8 41. Ke5 Ke7 42. Bd1 Be6 43. a3 Bc4 44. g4 Bd3 45. f5 Bc4 46. Ba4 Ba2 47. f6+ Kd8 48. Kd6 Be6 49. Bd1 Ba2 50. Kc6 Kc8 51. Be2 Be6 52. Ba6+ Kb8 53. Kd6 Ba2 54. Bb5 Kc8 55. Ke7 Be6 56. Be8 1-0

[Event "Maastricht Limburg op-C 7th"]
[Site "Maastricht"]
[Date "2013.05.20"]
[Round "7"]
[White "Been, Klaas"]
[Black "Sipkema, Willem"]
[Result "1-0"]
[ECO "D04"]
[WhiteElo "1773"]
[PlyCount "49"]
[EventDate "2013.05.17"]
[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 g6 3. e3 Bg7 4. Bd3 Nc6 5. c3 d5 6. Nbd2 0-0 7. 0-0 Re8 8. e4 dxe4 9. Nxe4 b6 10. Re1 Bb7 11. Bf4 Nh5 12. Qd2 Nxf4 13. Qxf4 e5 14. Qg3 exd4 15. Neg5 Qd7 16. Bc4 Rf8 17. Nxh7 Na5 18. Qxg6 Qc6 19. Nxf8 Nxc4 20. Qxc6 Bxc6 21. Nxd4 Kxf8 22. Nxc6 Nxb2 23. Re7 Bxc3 24. Rc1 Rd8 25. Nxd8 1-0

[Event "Maastricht Limburg op-C 7th"]
[Site "Maastricht"]
[Date "2013.05.20"]
[Round "6"]
[White "Sipkema, Willem"]
[Black "Roemhild, Wolfgang"]
[Result "0-1"]
[ECO "C45"]
[PlyCount "60"]
[EventDate "2013.05.17"]
[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 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 d6 6. Bc4 Be6 7. Bxe6 fxe6 8. 0-0 Qf6 9. Qa4+ c6 10. Nc3 Ne7 11. Qb4 0-0-0 12. Qa5 a6 13. Be3 c5 14. Rfd1 Nc6 15. Qb6 Be7 16. f3 Rd7 17. Bf2 Bd8 18. Qb3 Ne5 19. Ne2 Bc7 20. c4 g5 21. Nc3 h5 22. Bg3 h4 23. Bxe5 Qxe5 24. Kf2 Qxh2 25. Rh1 Qg3+ 26. Kf1 h3 27. Qc2 Rf7 28. Qf2 hxg2+ 29. Qxg2 Rxh1+ 30. Qxh1 Rxf3+ 0-1

[Event "Maastricht Limburg op-C 7th"]
[Site "Maastricht"]
[Date "2013.05.19"]
[Round "5"]
[White "Van Velthoven, Paul"]
[Black "Sipkema, Willem"]
[Result "0-1"]
[ECO "B20"]
[PlyCount "87"]
[EventDate "2013.05.17"]
[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 c5 2. g3 Nc6 3. Bg2 d6 4. c3 g6 5. Ne2 Bg4 6. d4 cxd4 7. f3 Bd7 8. Nxd4 Bg7 9. Be3 Nf6 10. 0-0 d5 11. Nd2 dxe4 12. Nxe4 Nxe4 13. fxe4 0-0 14. Qd2 Ne5 15. Qc2 Nc4 16. Bf2 Qc7 17. Rad1 Bh6 18. Rfe1 Rfd8 19. e5 Nxe5 20. Qe4 Bg7 21. Qxb7 Qxb7 22. Bxb7 Rab8 23. Rxe5 Bxe5 24. Nc6 Bxc6 25. Rxd8+ Rxd8 26. Bxc6 Rd1+ 27. Kg2 Rd2 28. Kf3 Rxb2 29. Bxa7 Rxa2 30. Bc5 Bxc3 31. h4 e5 32. Ke4 Kg7 33. Bd6 Ra6 34. Kd5 Rxc6 35. Kxc6 e4 36. Bf4 f5 37. Kd5 Bf6 38. Ke6 Bc3 39. Be3 Be1 40. Bf4 Bf2 41. Be5+ Kg8 42. Kd5 e3 43. Bd4 Bxg3 44. Bxe3 0-1

[Event "Maastricht Limburg op-C 7th"]
[Site "Maastricht"]
[Date "2013.05.18"]
[Round "2"]
[White "Sipkema, Willem"]
[Black "Johnen, Franz"]
[Result "1-0"]
[ECO "D46"]
[BlackElo "1757"]
[PlyCount "89"]
[EventDate "2013.05.17"]
[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 d5 2. c4 c6 3. e3 Nf6 4. Nc3 e6 5. Nf3 Be7 6. a3 0-0 7. Bd3 Nbd7 8. 0-0 b6 9. cxd5 cxd5 10. Bd2 Bb7 11. Qb3 Rc8 12. Rac1 Ne4 13. Ne2 Ndf6 14. Rxc8 Qxc8 15. Rc1 Qb8 16. h3 Rc8 17. Rxc8+ Qxc8 18. Bb4 Bd6 19. Bxd6 Nxd6 20. Ne5 Nfe4 21. Qc2 Qxc2 22. Bxc2 f6 23. Nd3 Ba6 24. Nef4 Kf7 25. Nb4 Bb7 26. f3 Ng3 27. Kf2 Ngf5 28. b3 g5 29. Ne2 a5 30. Na2 h6 31. Bd3 Bc6 32. Nec3 Ke7 33. a4 e5 34. dxe5 fxe5 35. g4 Nxe3 36. Kxe3 d4+ 37. Kf2 dxc3 38. Nxc3 Ke6 39. Ke3 Bd5 40. Bc2 Nb7 41. Nxd5 Kxd5 42. Be4+ Kc5 43. Bxb7 Kb4 44. Bd5 Kc5 45. Ke4 1-0

[Event "Maastricht Limburg op-C 7th"]
[Site "Maastricht"]
[Date "2013.05.18"]
[Round "3"]
[White "Sipkema, Willem"]
[Black "Lammes, Pim"]
[Result "1-0"]
[ECO "C44"]
[PlyCount "35"]
[EventDate "2013.05.17"]
[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 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bd6 5. 0-0 Nge7 6. Nxd4 Ne5 7. Bb3 Bc5 8. Bg5 d6 9. Nc3 c6 10. h3 Bxd4 11. Qxd4 Be6 12. f4 Bxb3 13. fxe5 c5 14. Qd3 Bxc2 15. Qxc2 dxe5 16. Qa4+ Qd7 17. Qxd7+ Kxd7 18. Rxf7 1-0

[Event "Maastricht Limburg op-C 7th"]
[Site "Maastricht"]
[Date "2013.05.17"]
[Round "1"]
[White "Schlegel, Kai Friedrich"]
[Black "Sipkema, Willem"]
[Result "1/2-1/2"]
[ECO "D54"]
[PlyCount "86"]
[EventDate "2013.05.17"]
[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 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 0-0 6. Rc1 h6 7. Bh4 c6 8. cxd5 exd5 9. Nf3 Bg4 10. Bd3 Nbd7 11. 0-0 Re8 12. h3 Bh5 13. g4 Bg6 14. Bxg6 fxg6 15. Qc2 g5 16. Bg3 Nf8 17. a3 Bd6 18. Bxd6 Qxd6 19. Na4 Ne4 20. Nc5 Nxc5 21. Qxc5 Qf6 22. Ne5 Ne6 23. Qb4 Re7 24. Nd3 Rf7 25. Qd6 Rd8 26. Qe5 Rdf8 27. Qxf6 gxf6 28. Rc3 Rc7 29. Rfc1 Rh7 30. Kg2 h5 31. Rh1 Kf7 32. b4 Rfh8 33. f3 Re8 34. Nc5 Nxc5 35. bxc5 Kg6 36. Rb1 hxg4 37. hxg4 Reh8 38. Rcb3 Rh2+ 39. Kf1 Rc2 40. Kg1 Rhh2 41. Rxb7 Rcg2+ 42. Kf1 Ra2 43. Kg1 Rag2+ 1/2-1/2

[Event "Groningen Compact op-C"]
[Site "Groningen"]
[Date "2008.12.29"]
[Round "4"]
[White "Reintke, Erwin"]
[Black "Sipkema, Willem"]
[Result "1-0"]
[ECO "B85"]
[WhiteElo "1723"]
[BlackElo "1585"]
[PlyCount "37"]
[EventDate "2008.12.26"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "NED"]
[SourceTitle "CBM 127 Extra"]
[Source "ChessBase"]
[SourceDate "2009.01.08"]
[SourceVersion "2"]
[SourceVersionDate "2009.01.28"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 d6 7. Be3 e6 8. 0-0 Be7 9. f4 0-0 10. Bf3 Qc7 11. Qd2 Nxd4 12. Qxd4 Bd7 13. g4 Bc6 14. g5 Nd7 15. h4 f6 16. Qc4 Rf7 17. Qxe6 Nf8 18. Qb3 Ne6 19. Qxe6 1-0

