[Event "Groningen op-B 55th"]
[Site "Groningen"]
[Date "2017.12.24"]
[Round "4"]
[White "Dekker, Jasper"]
[Black "De Boer, Sake Jan"]
[Result "1-0"]
[ECO "C02"]
[WhiteElo "1700"]
[BlackElo "1524"]
[PlyCount "55"]
[EventDate "2017.12.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Bd3 Bd7 7. 0-0 cxd4 8. cxd4 Nge7 9. Nc3 Nxd4 10. Nxd4 Qxd4 11. Nb5 Qxe5 12. Re1 Qb8 13. Qf3 e5 14. Rxe5 Qxe5 15. Bf4 Qxb2 16. Nd6+ Kd8 17. Nxf7+ Ke8 18. Nd6+ Kd8 19. Rb1 Qf6 20. Nxb7+ Ke8 21. Nd6+ Kd8 22. h4 h6 23. Nf7+ Ke8 24. Nxh8 g6 25. Re1 Qxh8 26. Qxd5 Rc8 27. Bxg6+ Kd8 28. Qa5+ 1-0

[Event "Groningen Atlantis op-B"]
[Site "Groningen"]
[Date "2013.08.25"]
[Round "6"]
[White "De Boer, Sake Jan"]
[Black "Bettman, Jan"]
[Result "0-1"]
[ECO "B29"]
[BlackElo "1858"]
[PlyCount "68"]
[EventDate "2013.08.22"]
[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 c5 2. Nf3 Nf6 3. e5 Nd5 4. c4 Nc7 5. d4 cxd4 6. Qxd4 Nc6 7. Qe4 b6 8. Bg5 Bb7 9. Be2 Ne6 10. Bh4 Qb8 11. Nc3 Ncd4 12. Qd3 Nxf3+ 13. Bxf3 Qxe5+ 14. Kf1 Nf4 15. Qe3 Qxe3 16. fxe3 Bxf3 17. gxf3 Nd3 18. b3 g6 19. Rd1 Ne5 20. Ke2 Rc8 21. Rd5 Bg7 22. Rhd1 d6 23. Ne4 h6 24. f4 Nc6 25. a3 g5 26. fxg5 hxg5 27. Rxg5 Rxh4 28. Nxd6+ exd6 29. Rxg7 Rxh2+ 30. Kf3 Ke7 31. Rf1 Rch8 32. Ke4 Ne5 33. Kd4 Rd2+ 34. Ke4 Ke6 0-1

[Event "Groningen Atlantis op-B"]
[Site "Groningen"]
[Date "2013.08.22"]
[Round "1"]
[White "De Boer, Sake Jan"]
[Black "Krawczyk, Jarek"]
[Result "0-1"]
[ECO "C55"]
[PlyCount "28"]
[EventDate "2013.08.22"]
[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 e5 2. Nf3 Nc6 3. Bc4 Be7 4. 0-0 Nf6 5. c3 0-0 6. Re1 Nxe4 7. Bxf7+ Rxf7 8. Rxe4 d5 9. Rxe5 Rxf3 10. Rxe7 Qxe7 11. gxf3 Qg5+ 12. Kh1 Bh3 13. Qg1 Qf5 14. Qg3 Re8 0-1

