[Event "Hoogeveen op 26th"]
[Site "Hoogeveen"]
[Date "2023.10.27"]
[Round "8"]
[White "Fehr, Axel"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "A38"]
[WhiteElo "2011"]
[BlackElo "1997"]
[PlyCount "57"]
[EventDate "2023.10.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "Mega2024 Update 01"]
[Source "Chessbase"]
[SourceDate "2023.11.12"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.12"]
[SourceQuality "1"]

1. Nf3 g6 2. c4 Bg7 3. g3 c5 4. Bg2 Nc6 5. 0-0 Nf6 6. d4 cxd4 7. Nxd4 0-0 8. Nc3 Qa5 9. Nc2 d6 10. Nd5 Nxd5 11. cxd5 Ne5 12. Bd2 Qb6 13. Bc3 Bd7 14. Bd4 Qa5 15. f4 Ng4 16. h3 Bxd4+ 17. Qxd4 Nf6 18. e4 Rfc8 19. Rfc1 Qc5 20. Kh2 Qxd4 21. Nxd4 Be8 22. g4 a6 23. Kg3 Nd7 24. Kf3 Nb6 25. Bf1 Na4 26. b3 Nc5 27. Rc2 Nd7 28. Rac1 Nb6 29. Rc7 1-0

[Event "Hoogeveen op 26th"]
[Site "Hoogeveen"]
[Date "2023.10.26"]
[Round "7"]
[White "Zecha, Oscar"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "B38"]
[WhiteElo "1838"]
[BlackElo "1997"]
[PlyCount "111"]
[EventDate "2023.10.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "Mega2024 Update 01"]
[Source "Chessbase"]
[SourceDate "2023.11.12"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.12"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. c4 Nf6 6. Nc3 Bg7 7. Be3 0-0 8. Be2 b6 9. 0-0 Bb7 10. f3 Qb8 11. Qd2 Rd8 12. f4 d6 13. Bf3 e6 14. Qf2 Na5 15. b3 Rd7 16. Rad1 Qf8 17. g4 Rad8 18. f5 exf5 19. gxf5 Re8 20. Qh4 h6 21. fxg6 fxg6 22. Nd5 Rf7 23. Nxf6+ Rxf6 24. Bg2 Rxf1+ 25. Rxf1 Qe7 26. Qxe7 Rxe7 27. Re1 Be5 28. Rd1 Kg7 29. Nb5 Bc8 30. Nxd6 Bg4 31. Rd5 Nc6 32. Nb5 Bf6 33. Rd6 Re6 34. Rxe6 Bxe6 35. Kf2 Be5 36. h3 g5 37. Ke2 Kf6 38. Kd2 h5 39. Nc3 Bf4 40. Bxf4 gxf4 41. Ne2 Ke5 42. Ng1 Nd4 43. h4 Bg4 44. Kd3 f3 45. Bf1 a5 46. Ke3 Nc2+ 47. Kd2 Nd4 48. Kd3 Ne6 49. Ke3 Nd4 50. Bd3 Nc6 51. Nxf3+ Bxf3 52. Kxf3 Kd4 53. Be2 Kc3 54. Ke3 Kb2 55. Bxh5 Kxa2 56. Be8 1-0

[Event "Hoogeveen op 26th"]
[Site "Hoogeveen"]
[Date "2023.10.25"]
[Round "6"]
[White "Boersma, Jan"]
[Black "Boeren, Jurriaan"]
[Result "1/2-1/2"]
[ECO "C12"]
[WhiteElo "1997"]
[BlackElo "2120"]
[PlyCount "43"]
[EventDate "2023.10.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "Mega2024 Update 01"]
[Source "Chessbase"]
[SourceDate "2023.11.12"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.12"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. Nge2 dxe4 6. a3 Be7 7. Bxf6 Bxf6 8. Nxe4 Be7 9. g3 0-0 10. Bg2 Nd7 11. 0-0 e5 12. N4c3 exd4 13. Nxd4 c6 14. Qe2 Bf6 15. Rad1 Qb6 16. Na4 Qa5 17. Nc3 Ne5 18. h3 Bd7 19. Ne4 Bd8 20. Nd6 Bf6 21. Ne4 Bd8 22. Nd6 1/2-1/2

[Event "Hoogeveen op 26th"]
[Site "Hoogeveen"]
[Date "2023.10.24"]
[Round "4"]
[White "Vogel, Jaap"]
[Black "Boersma, Jan"]
[Result "1/2-1/2"]
[ECO "A49"]
[WhiteElo "2106"]
[BlackElo "1997"]
[PlyCount "25"]
[EventDate "2023.10.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "Mega2024 Update 01"]
[Source "Chessbase"]
[SourceDate "2023.11.12"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.12"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 0-0 5. 0-0 d6 6. a4 c6 7. Nc3 Bg4 8. a5 a6 9. h3 Bxf3 10. Bxf3 Nbd7 11. Bg2 Qc7 12. e4 e5 13. Be3 1/2-1/2

[Event "Hoogeveen op 26th"]
[Site "Hoogeveen"]
[Date "2023.10.23"]
[Round "3"]
[White "Boersma, Jan"]
[Black "Kett, Timothy"]
[Result "0-1"]
[ECO "C48"]
[WhiteElo "1997"]
[BlackElo "2130"]
[PlyCount "48"]
[EventDate "2023.10.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "Mega2024 Update 01"]
[Source "Chessbase"]
[SourceDate "2023.11.12"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.12"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. 0-0 Nxb5 6. Nxb5 d6 7. Nc3 c5 8. d3 h6 9. Nd2 Be7 10. Nc4 0-0 11. a4 Be6 12. Qf3 Nh7 13. Ne3 Bg5 14. Nf5 g6 15. Nxh6+ Kg7 16. Ng4 f5 17. exf5 gxf5 18. Ne3 Bf4 19. Ned5 Ng5 20. Qe2 Bxc1 21. Raxc1 f4 22. f3 Rh8 23. b4 cxb4 24. Nxb4 Qb6+ 0-1

[Event "Hoogeveen op 26th"]
[Site "Hoogeveen"]
[Date "2023.10.22"]
[Round "2"]
[White "De Winter, Arthur"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "B27"]
[WhiteElo "2397"]
[BlackElo "1997"]
[PlyCount "38"]
[EventDate "2023.10.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "Mega2024 Update 01"]
[Source "Chessbase"]
[SourceDate "2023.11.12"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.12"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. c3 d5 4. e5 a6 5. d4 cxd4 6. cxd4 Nc6 7. h3 Bg7 8. Nc3 f6 9. Bf4 Nh6 10. exf6 exf6 11. Bd3 0-0 12. 0-0 Nf7 13. Qb3 g5 14. Bh2 g4 15. hxg4 Bxg4 16. Qxb7 Bxf3 17. Qxc6 Rc8 18. Qe6 Bh5 19. Qxd5 Bg6 1-0

[Event "Hoogeveen op 26th"]
[Site "Hoogeveen"]
[Date "2023.10.21"]
[Round "1"]
[White "Boersma, Jan"]
[Black "Van Kooten, Luuk"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "1997"]
[BlackElo "2255"]
[PlyCount "40"]
[EventDate "2023.10.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "Mega2024 Update 01"]
[Source "Chessbase"]
[SourceDate "2023.11.12"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.12"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. Bb5 g6 4. Bxc6 dxc6 5. d3 Bg7 6. Be3 b6 7. Qd2 e5 8. f4 Nf6 9. Nf3 Ng4 10. Nxe5 Nxe5 11. fxe5 Bxe5 12. 0-0 Qd6 13. Bf4 Be6 14. Bxe5 Qxe5 15. Qf4 Qxf4 16. Rxf4 Rd8 17. e5 Ke7 18. Re1 Rd4 19. Rf2 Rhd8 20. b3 Bf5 1/2-1/2

[Event "Dieren op"]
[Site "Dieren"]
[Date "2023.08.03"]
[Round "9"]
[White "Boersma, Jan"]
[Black "Markus, John Raymond"]
[Result "1/2-1/2"]
[ECO "B06"]
[WhiteElo "1988"]
[BlackElo "2001"]
[PlyCount "21"]
[EventDate "2023.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. Nc3 g6 2. e4 d6 3. f4 Bg7 4. Nf3 c6 5. d4 b5 6. Bd3 Nd7 7. 0-0 c5 8. d5 c4 9. Be2 Qc7 10. a3 Ngf6 11. Nd4 1/2-1/2

[Event "Dieren op"]
[Site "Dieren"]
[Date "2023.08.02"]
[Round "8"]
[White "Kurt, Sascha"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "B27"]
[WhiteElo "1986"]
[BlackElo "1988"]
[PlyCount "103"]
[EventDate "2023.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Qxd4 Nf6 5. e5 Nc6 6. Qa4 Nd5 7. Qb3 Nb6 8. Bf4 Bg7 9. Nc3 d5 10. exd6 Be6 11. Qa3 0-0 12. 0-0-0 exd6 13. Bxd6 Qc8 14. Nb5 Rd8 15. Bd3 Nd5 16. Be4 Nf6 17. Bxc6 bxc6 18. Nc7 Rxd6 19. Qxd6 Ne4 20. Qxc6 Rb8 21. Rd4 Nxf2 22. Rf1 Rb6 23. Nxe6 Rxc6 24. Rd8+ Qxd8 25. Nxd8 Bh6+ 26. Kb1 Rd6 27. Nb7 Rb6 28. Rxf2 Rxb7 29. c3 f5 30. Kc2 Bg7 31. Re2 h6 32. b3 g5 33. c4 Bf6 34. a3 Kf7 35. b4 f4 36. c5 Rc7 37. Kb3 g4 38. Ne1 Kg6 39. Kc4 h5 40. b5 h4 41. c6 Kf5 42. a4 Rh7 43. h3 gxh3 44. gxh3 Bd8 45. Nf3 Bb6 46. Re5+ Kf6 47. Kd5 Rh8 48. Ke4 Bc7 49. Rf5+ Kg6 50. Ne5+ Bxe5 51. Rxe5 Rf8 52. Kf3 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2023.08.01"]
[Round "7"]
[White "Boersma, Jan"]
[Black "Hu, Yu A"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "1988"]
[BlackElo "2056"]
[PlyCount "56"]
[EventDate "2023.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 d6 3. f4 Nc6 4. Nf3 Nf6 5. Bb5 Bd7 6. 0-0 e6 7. d3 Be7 8. Kh1 0-0 9. Be3 d5 10. Bg1 d4 11. Ne2 Qb6 12. a4 a6 13. Bxc6 Bxc6 14. b3 Nd7 15. Nd2 f5 16. Ng3 Qc7 17. exf5 exf5 18. Qh5 g6 19. Qh3 Bd6 20. Qh4 Rae8 21. Nc4 Be7 22. Qh6 b5 23. axb5 axb5 24. Nd2 Nf6 25. h3 Kh8 26. Nxf5 gxf5 27. Rae1 Rg8 28. Nf3 Rg6 0-1

[Event "Dieren op"]
[Site "Dieren"]
[Date "2023.07.31"]
[Round "6"]
[White "Ritzerveld, Noah"]
[Black "Boersma, Jan"]
[Result "1/2-1/2"]
[ECO "B38"]
[WhiteElo "2007"]
[BlackElo "1988"]
[PlyCount "56"]
[EventDate "2023.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. c4 Bg7 6. Be3 Qb6 7. Nb3 Qd8 8. Nc3 d6 9. Be2 Nf6 10. f3 0-0 11. Qd2 Be6 12. 0-0 Na5 13. Nxa5 Qxa5 14. Rab1 Rfc8 15. b4 Qd8 16. Nd5 Bxd5 17. exd5 Qd7 18. Rfd1 b6 19. c5 dxc5 20. bxc5 bxc5 21. Bb5 Qf5 22. Bc6 Rab8 23. Rxb8 Rxb8 24. Bxc5 Nd7 25. Bd4 Ne5 26. Bxa7 Rb2 27. Qc1 Rxa2 28. d6 exd6 1/2-1/2

[Event "Dieren op"]
[Site "Dieren"]
[Date "2023.07.29"]
[Round "5"]
[White "Boersma, Jan"]
[Black "Bus, Tom"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "1988"]
[BlackElo "2100"]
[PlyCount "22"]
[EventDate "2023.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 a6 3. g3 b5 4. Bg2 Bb7 5. d3 e6 6. Nh3 h5 7. 0-0 Nc6 8. f4 Nd4 9. Ne2 Nf6 10. c3 Nxe2+ 11. Qxe2 Qc7 1/2-1/2

[Event "Dieren op"]
[Site "Dieren"]
[Date "2023.07.28"]
[Round "4"]
[White "Shakhverdian, William"]
[Black "Boersma, Jan"]
[Result "1/2-1/2"]
[ECO "E73"]
[WhiteElo "2129"]
[BlackElo "1988"]
[PlyCount "60"]
[EventDate "2023.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 0-0 5. Be2 d6 6. Be3 c5 7. d5 e6 8. Nf3 exd5 9. cxd5 Bg4 10. 0-0 Nbd7 11. Re1 Re8 12. Qc2 b5 13. Bxb5 Bxf3 14. gxf3 Ne5 15. Qd1 Rf8 16. h3 Rb8 17. f4 Ned7 18. a4 Qc8 19. Qd2 a6 20. Be2 Re8 21. Qc2 Rb4 22. Bf3 h6 23. Re2 Nh7 24. Bg2 g5 25. Rae1 Ndf8 26. Qc1 Ng6 27. fxg5 hxg5 28. Bxg5 Nxg5 29. Qxg5 Re5 30. Qg3 Bh6 1/2-1/2

[Event "Dieren op"]
[Site "Dieren"]
[Date "2023.07.27"]
[Round "3"]
[White "Boersma, Jan"]
[Black "De Jong, Tom"]
[Result "0-1"]
[ECO "B10"]
[WhiteElo "1988"]
[BlackElo "2176"]
[PlyCount "100"]
[EventDate "2023.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c6 2. c4 d5 3. cxd5 cxd5 4. exd5 Nf6 5. Qa4+ Nbd7 6. Nc3 g6 7. Nf3 Bg7 8. Bc4 0-0 9. d3 a6 10. Qa3 b6 11. 0-0 Bb7 12. Re1 Re8 13. Bg5 b5 14. Bb3 Nb6 15. d6 Qxd6 16. Ne5 Nfd5 17. Nxd5 Nxd5 18. Qxd6 exd6 19. Nd7 Bxb2 20. Bxd5 Bxd5 21. Nb6 Bxa1 22. Rxa1 Be6 23. Nxa8 Rxa8 24. Bf6 Rc8 25. h3 Kf8 26. a4 b4 27. a5 Ke8 28. g4 Kd7 29. Kg2 b3 30. Ra4 Rb8 31. Bb2 Kc6 32. Kf3 Kb5 33. Ra1 Kb4 34. Ke3 Rc8 35. Ba3+ Kxa5 36. Bxd6+ Kb5 37. Be5 a5 38. Bb2 Rc2 39. Ba3 a4 40. f3 Rh2 41. Ke4 Ra2 42. Rxa2 bxa2 43. Bb2 Kb4 44. d4 Kb3 45. Ba1 Kc2 46. d5 Bxd5+ 47. Kxd5 Kb1 48. Bf6 a1Q 49. Bxa1 Kxa1 50. Kc4 Kb2 0-1

[Event "Dieren op"]
[Site "Dieren"]
[Date "2023.07.26"]
[Round "2"]
[White "Kools, Thomas"]
[Black "Boersma, Jan"]
[Result "1/2-1/2"]
[ECO "B25"]
[WhiteElo "2112"]
[BlackElo "1988"]
[PlyCount "68"]
[EventDate "2023.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. d3 Bg7 5. Bg2 d6 6. f4 e6 7. Nf3 Nge7 8. 0-0 0-0 9. Be3 Rb8 10. Nh4 Nd4 11. Qd2 b5 12. Nd1 b4 13. c3 bxc3 14. bxc3 Nb5 15. a4 Nc7 16. Nf2 f5 17. Nf3 Bb7 18. Qc2 Qd7 19. Rfe1 Bc6 20. Nd2 Rb7 21. Nc4 Rbb8 22. Nd1 Ne8 23. Bf2 Nc7 24. Qa2 Kh8 25. Qa3 Rfe8 26. Na5 Ba8 27. Ne3 Nc6 28. Nxc6 Bxc6 29. Nc4 Ba8 30. h4 Rbd8 31. Nd2 h6 32. Bf3 e5 33. Be3 Ne6 34. Kg2 exf4 1/2-1/2

[Event "Dieren op"]
[Site "Dieren"]
[Date "2023.07.25"]
[Round "1"]
[White "Boersma, Jan"]
[Black "Bollen, Guus"]
[Result "0-1"]
[ECO "B10"]
[WhiteElo "1988"]
[BlackElo "2183"]
[PlyCount "68"]
[EventDate "2023.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c6 2. c4 d5 3. exd5 cxd5 4. cxd5 Qxd5 5. Nc3 Qa5 6. d4 Nf6 7. Nf3 g6 8. Bc4 Bg7 9. 0-0 0-0 10. Ne5 Nc6 11. Nxc6 bxc6 12. Re1 e6 13. Qf3 Nd5 14. Rd1 Rb8 15. Ne4 Nb6 16. Bf1 Qf5 17. Bf4 Ra8 18. Ng3 Qd5 19. Qe3 Rd8 20. Be2 Bxd4 21. Qa3 Bb7 22. Bf3 Qc5 23. Bg5 f6 24. Rac1 Qb5 25. Bh6 Kf7 26. Be2 Qxb2 27. Qf3 Rd7 28. Ne4 c5 29. Rb1 Bxe4 30. Qxe4 Qxa2 31. h4 Qd5 32. Qf4 Qf5 33. Qg3 Rad8 34. Bg4 Bxf2+ 0-1

[Event "Hoogeveen op 25th"]
[Site "Hoogeveen"]
[Date "2022.10.22"]
[Round "9"]
[White "Boersma, Jan"]
[Black "Warnk, Torsten"]
[Result "1/2-1/2"]
[ECO "C15"]
[WhiteElo "1930"]
[BlackElo "1709"]
[PlyCount "52"]
[EventDate "2022.10.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Nge2 dxe4 5. a3 Ba5 6. b4 Bb6 7. Nxe4 Nf6 8. Bg5 Nbd7 9. c4 c6 10. Nd6+ Ke7 11. c5 Bc7 12. Nxc8+ Rxc8 13. g3 h6 14. Bf4 Nd5 15. Bxc7 Qxc7 16. Bg2 N7f6 17. 0-0 Rhe8 18. Nc1 Kf8 19. Nd3 Rcd8 20. Rc1 Ne7 21. Ne5 Nf5 22. Rc4 Nd7 23. Nf3 e5 24. Bh3 Nxd4 25. Nxd4 exd4 26. Rxd4 Nf6 1/2-1/2

[Event "Hoogeveen op 25th"]
[Site "Hoogeveen"]
[Date "2022.10.21"]
[Round "8"]
[White "Storkebaum, Ulrike"]
[Black "Boersma, Jan"]
[Result "1/2-1/2"]
[ECO "B38"]
[WhiteElo "1768"]
[BlackElo "1930"]
[PlyCount "40"]
[EventDate "2022.10.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. c4 Bg7 6. Be3 Qb6 7. Nb5 Qa5+ 8. N1c3 Nf6 9. f3 0-0 10. Be2 d6 11. 0-0 Be6 12. Rc1 a6 13. Nd4 Nxd4 14. Bxd4 Rfc8 15. b3 b5 16. cxb5 axb5 17. Qd3 b4 18. Na4 Nd7 19. Bxg7 Kxg7 20. Qd4+ f6 1/2-1/2

[Event "Hoogeveen op 25th"]
[Site "Hoogeveen"]
[Date "2022.10.20"]
[Round "7"]
[White "Boersma, Jan"]
[Black "Vasse, Albert"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "1930"]
[BlackElo "1844"]
[PlyCount "56"]
[EventDate "2022.10.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. Bb5 g6 4. Bxc6 dxc6 5. f4 Nf6 6. Nf3 Bg7 7. 0-0 0-0 8. h3 Qc7 9. d3 Bd7 10. Qe1 h6 11. Qh4 Rfe8 12. Bd2 Kf8 13. Rae1 Ng8 14. e5 e6 15. Ne4 Qd8 16. Qf2 b6 17. g4 Qc7 18. c4 Ne7 19. Bc3 Red8 20. Nfd2 Bc8 21. Nd6 Rxd6 22. exd6 Qxd6 23. Ne4 Qd8 24. Nf6 Nd5 25. Nh7+ Kg8 26. Bxg7 Kxg7 27. cxd5 Kxh7 28. dxe6 Bxe6 1/2-1/2

[Event "Hoogeveen op 25th"]
[Site "Hoogeveen"]
[Date "2022.10.19"]
[Round "6"]
[White "Kotyk, Michael"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "E71"]
[WhiteElo "2105"]
[BlackElo "1930"]
[PlyCount "69"]
[EventDate "2022.10.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 0-0 5. Be3 d6 6. h3 Nc6 7. d5 Nb8 8. Nf3 c6 9. Be2 e6 10. dxe6 Bxe6 11. 0-0 Na6 12. a3 Qe7 13. Qc2 Rfe8 14. Rad1 Bc8 15. b4 Nxe4 16. Qxe4 Qxe4 17. Nxe4 Rxe4 18. Rxd6 Re8 19. Rfd1 h6 20. b5 cxb5 21. cxb5 Nc7 22. Rc1 Ne6 23. a4 Bf8 24. Rdd1 Bg7 25. Bc4 g5 26. Bd5 a6 27. Rxc8 Raxc8 28. Bxb7 Rcd8 29. Rxd8 Rxd8 30. bxa6 Nc7 31. Bb6 Rd1+ 32. Kh2 Nxa6 33. Bxa6 Rd6 34. a5 Bc3 35. Bc8 1-0

[Event "Hoogeveen op 25th"]
[Site "Hoogeveen"]
[Date "2022.10.18"]
[Round "4"]
[White "Boersma, Jan"]
[Black "Asatryan, Sona"]
[Result "0-1"]
[ECO "E57"]
[WhiteElo "1930"]
[BlackElo "2088"]
[PlyCount "100"]
[EventDate "2022.10.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. e4 c6 2. c4 d5 3. exd5 cxd5 4. d4 Nf6 5. Nc3 e6 6. Nf3 Bb4 7. Bd3 Nc6 8. 0-0 0-0 9. Bg5 dxc4 10. Bxc4 h6 11. Bh4 Be7 12. Rc1 b6 13. a3 Bb7 14. Ba2 Rc8 15. Qd3 Nd5 16. Nxd5 Bxh4 17. Bb1 f5 18. Nf4 Qf6 19. Nxh4 g5 20. Nxe6 gxh4 21. Nxf8 Rxf8 22. Ba2+ Kh8 23. d5 Ne5 24. Qh3 Ba6 25. Rfe1 Nd3 26. Rc6 Qg5 27. Ree6 Nf4 28. Rxh6+ Kg8 29. Qf3 Re8 30. h3 Be2 31. d6+ Kg7 32. d7 Bxf3 33. dxe8N+ Kf8 34. Rh8+ Ke7 35. Rc7+ Kd8 36. Rg7 Nxh3+ 37. Kh2 Qf4+ 38. g3 hxg3+ 39. Rxg3 Nxf2 40. Ng7+ Kd7 41. Be6+ Kc6 42. Nxf5 Nh1 43. Rc8+ Kb7 44. Rc4 Qd2+ 45. Kh3 Nxg3 46. Kxg3 b5 47. Rd4 Qg2+ 48. Kf4 Bc6 49. b3 Qa2 50. a4 bxa4 0-1

[Event "Hoogeveen op 25th"]
[Site "Hoogeveen"]
[Date "2022.10.17"]
[Round "3"]
[White "Oosterhuis, Arend"]
[Black "Boersma, Jan"]
[Result "0-1"]
[ECO "B21"]
[BlackElo "1930"]
[PlyCount "36"]
[EventDate "2022.10.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. e4 c5 2. f4 d5 3. e5 Bf5 4. Nc3 e6 5. Bb5+ Nc6 6. Bxc6+ bxc6 7. Nf3 Ne7 8. Nh4 Ng6 9. Nxg6 hxg6 10. g3 d4 11. Nb1 Be4 12. 0-0 d3 13. c4 Qd4+ 14. Rf2 Rxh2 15. Kxh2 Qxf2+ 16. Kh3 Qg2+ 17. Kh4 Be7+ 18. Kg4 Bf5# 0-1

[Event "Hoogeveen op 25th"]
[Site "Hoogeveen"]
[Date "2022.10.16"]
[Round "2"]
[White "Boersma, Jan"]
[Black "Spaans, Leo"]
[Result "1-0"]
[ECO "C48"]
[WhiteElo "1930"]
[BlackElo "1791"]
[PlyCount "63"]
[EventDate "2022.10.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. 0-0 Nxb5 6. Nxb5 c6 7. Nc3 Qc7 8. d4 d6 9. h3 h6 10. a4 Be7 11. Be3 0-0 12. Qd2 Re8 13. a5 Bf8 14. Rfe1 Bd7 15. Qd3 Rad8 16. dxe5 dxe5 17. Bxa7 Bc8 18. Bb6 Rxd3 19. Bxc7 Rxf3 20. gxf3 Bxh3 21. Kh2 Bc8 22. Na4 Nd7 23. Red1 Nc5 24. Rd8 Rxd8 25. Bxd8 Ne6 26. Bb6 Nd4 27. Rd1 Nxf3+ 28. Kg3 Nd4 29. c3 Ne6 30. Be3 Ng5 31. Bxg5 hxg5 32. Rd8 1-0

[Event "Hoogeveen op 25th"]
[Site "Hoogeveen"]
[Date "2022.10.15"]
[Round "1"]
[White "Hovhannisyan, Robert"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "B27"]
[WhiteElo "2601"]
[BlackElo "1930"]
[PlyCount "67"]
[EventDate "2022.10.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Qxd4 Nf6 5. Nc3 Nc6 6. Qa4 d6 7. e5 dxe5 8. Nxe5 Bg7 9. Bb5 0-0 10. Nxc6 bxc6 11. Bxc6 Rb8 12. 0-0 Qc7 13. Re1 Ng4 14. Bf4 e5 15. Nd5 Qd8 16. Bg3 h5 17. Qxa7 Be6 18. Rad1 Kh8 19. Ne7 Qb6 20. Qxb6 Rxb6 21. h3 Nh6 22. Bxe5 Bxe5 23. Rxe5 Kg7 24. Rb5 Rxb5 25. Bxb5 Rb8 26. a4 Kf6 27. Nc6 Rc8 28. a5 Nf5 29. a6 h4 30. Rd8 Ne7 31. Rxc8 Bxc8 32. Nxe7 Kxe7 33. a7 Bb7 34. Be2 1-0

[Event "Hoogeveen op 24th"]
[Site "Hoogeveen"]
[Date "2021.10.19"]
[Round "5"]
[White "Van den Berg, Bram"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "B20"]
[WhiteElo "2209"]
[BlackElo "2049"]
[PlyCount "115"]
[EventDate "2021.10.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. e4 c5 2. b3 g6 3. Bb2 Nf6 4. Nc3 d6 5. Nd5 Bg7 6. Bb5+ Bd7 7. Nxf6+ exf6 8. Bxd7+ Qxd7 9. Qf3 Nc6 10. Bxf6 Nd4 11. Bxd4 cxd4 12. Qd3 0-0 13. Ne2 Rfe8 14. 0-0 Qe7 15. Ng3 h5 16. Rae1 h4 17. Nh1 Rac8 18. f3 Rc5 19. f4 Qc7 20. f5 Be5 21. fxg6 fxg6 22. Nf2 Rf8 23. Ng4 Rxf1+ 24. Rxf1 Rxc2 25. Nh6+ Kh8 26. Rf8+ Kg7 27. Rf7+ Kxh6 28. Rxc7 Rxc7 29. Kf2 Rf7+ 30. Ke2 Rc7 31. Qh3 Kg5 32. Kd3 a6 33. a4 Rh7 34. b4 Rc7 35. a5 Rh7 36. Qc8 Rg7 37. h3 Rh7 38. Kc4 Kf6 39. Kd5 Re7 40. Qd8 Kf7 41. d3 g5 42. Kc4 Kf6 43. b5 axb5+ 44. Kxb5 Bf4 45. Kb6 Bd2 46. Qh8+ Kf7 47. Qxd4 Bf4 48. Qd5+ Kf8 49. Ka7 Kg7 50. Kb8 Kf6 51. Kc8 Rf7 52. d4 Re7 53. Kd8 Rf7 54. Ke8 Rc7 55. e5+ Kg7 56. exd6 Rc8+ 57. Kd7 Rf8 58. Qxb7 1-0

[Event "Groningen op 57th"]
[Site "Groningen"]
[Date "2019.12.30"]
[Round "9"]
[White "Rut, Vojtech"]
[Black "Boersma, Jan"]
[Result "1/2-1/2"]
[ECO "A45"]
[WhiteElo "2119"]
[BlackElo "2069"]
[PlyCount "22"]
[EventDate "2019.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Bg5 Ne4 3. h4 d5 4. Nd2 h6 5. Nxe4 dxe4 6. Bf4 Bf5 7. e3 Nd7 8. g4 Bh7 9. Bg2 e6 10. Ne2 Be7 11. Nc3 Bb4 1/2-1/2

[Event "Groningen op 57th"]
[Site "Groningen"]
[Date "2019.12.29"]
[Round "8"]
[White "Gijsen, William"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "E61"]
[WhiteElo "1948"]
[BlackElo "2069"]
[PlyCount "105"]
[EventDate "2019.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 0-0 5. Bg5 d6 6. e3 Nbd7 7. Be2 c6 8. Qc2 Qe8 9. 0-0 a6 10. a4 e5 11. Rfe1 h6 12. Bh4 e4 13. Nd2 d5 14. cxd5 cxd5 15. f3 exf3 16. Bxf3 Qe6 17. Qb3 g5 18. Bg3 g4 19. Bxd5 Nxd5 20. Nxd5 b6 21. Nc7 Qxb3 22. Nxb3 Ra7 23. Bd6 Nf6 24. Bxf8 Bxf8 25. Rac1 Bd7 26. a5 bxa5 27. e4 Bb4 28. Re2 a4 29. Nd2 Ba5 30. Nd5 Nxd5 31. exd5 Bb6 32. Re4 f5 33. Re7 Bxd4+ 34. Kh1 Bxb2 35. Rc8+ Bxc8 36. Rxa7 a3 37. Ra8 a2 38. Nb3 a1Q+ 39. Nxa1 Bxa1 40. Rxc8+ Kf7 41. Ra8 Bd4 42. Rxa6 h5 43. g3 Be3 44. Re6 f4 45. Re4 Kf6 46. d6 Kf5 47. d7 Kxe4 48. d8Q f3 49. Qe8+ Kd3 50. Qxh5 f2 51. Kg2 Ke2 52. Qxg4+ Ke1 53. Qf3 1-0

[Event "Groningen op 57th"]
[Site "Groningen"]
[Date "2019.12.28"]
[Round "7"]
[White "Boersma, Jan"]
[Black "Tabak, Stefan"]
[Result "1/2-1/2"]
[ECO "B07"]
[WhiteElo "2069"]
[BlackElo "2166"]
[PlyCount "29"]
[EventDate "2019.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. e4 d6 2. Nc3 g6 3. d4 Nf6 4. Bf4 Bg7 5. Qd2 c6 6. Bh6 Bxh6 7. Qxh6 Nbd7 8. Nf3 e5 9. Bc4 Qe7 10. 0-0 Qf8 11. Qd2 Qe7 12. a4 0-0 13. Rfe1 Kg7 14. Rad1 h6 15. Bb3 1/2-1/2

[Event "Groningen op 57th"]
[Site "Groningen"]
[Date "2019.12.27"]
[Round "6"]
[White "Lubbe, Melanie"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "B70"]
[WhiteElo "2279"]
[BlackElo "2069"]
[PlyCount "169"]
[EventDate "2019.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. Be2 Bg7 6. Nb3 Nf6 7. Nc3 0-0 8. 0-0 d6 9. Re1 Be6 10. Bf1 Rc8 11. Nd5 Bxd5 12. exd5 Nb4 13. c4 b5 14. a3 bxc4 15. axb4 cxb3 16. Qxb3 Rc7 17. h3 Qa8 18. Ra5 Qb8 19. Be3 Nd7 20. Rea1 Nb6 21. Bb5 Be5 22. Ra6 Nc8 23. Bc6 Kg7 24. b5 h5 25. f4 Bf6 26. R1a3 h4 27. Kh2 Rb7 28. Bxb7 Qxb7 29. Qc4 Qd7 30. Bxa7 Nxa7 31. Rxa7 Qf5 32. b6 g5 33. b7 Rb8 34. Rb3 gxf4 35. Ra8 f3 36. Rxf3 Qe5+ 37. Kh1 Rxb7 38. Qg4+ Kh6 39. Rf1 Rxb2 40. Qf3 Re2 41. Ra3 Re1 42. Rd3 Rxf1+ 43. Qxf1 Qe4 44. Rd1 Kg7 45. Qd3 Qf4 46. Rf1 Qg5 47. Qe4 Be5 48. Qf3 Bf6 49. Rd1 Be5 50. Kg1 Bf6 51. Kf1 Qe5 52. Qg4+ Kh6 53. Rd3 Qa1+ 54. Qd1 Qe5 55. Qe2 Qa1+ 56. Rd1 Qa3 57. Qd2+ Bg5 58. Qd3 Qb2 59. Kg1 Qe5 60. Kf1 Be3 61. Qe2 Qf4+ 62. Qf3 Qxf3+ 63. gxf3 Bg5 64. Ke2 Kg6 65. Rg1 Kf5 66. Kd3 Bf6 67. Rg4 Bg5 68. Kc4 Bf6 69. Kb5 Ke5 70. Kc6 Kf5 71. Re4 Bg5 72. Kd7 Bf6 73. Ke8 e6 74. dxe6 fxe6 75. Kd7 d5 76. Rxe6 d4 77. Rd6 Be5 78. Rd5 Kf4 79. Ke6 Bg7 80. Rd7 Bh8 81. Rh7 Kxf3 82. Rxh8 Kg3 83. Kf5 Kxh3 84. Kf4 d3 85. Kf3 1-0

[Event "Groningen op 57th"]
[Site "Groningen"]
[Date "2019.12.26"]
[Round "5"]
[White "Boersma, Jan"]
[Black "Kumar, Naman"]
[Result "1/2-1/2"]
[ECO "C48"]
[WhiteElo "2069"]
[BlackElo "2082"]
[PlyCount "48"]
[EventDate "2019.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. Bb5 Nd4 5. 0-0 c6 6. Bd3 Nxf3+ 7. Qxf3 d6 8. Bc4 Be6 9. d3 Be7 10. Bxe6 fxe6 11. Qh3 Qd7 12. a4 0-0 13. Bd2 Rae8 14. Kh1 d5 15. Rae1 Bb4 16. Nb1 Bc5 17. Bc3 Bd6 18. b3 Qf7 19. Nd2 d4 20. Nc4 Qc7 21. Bd2 b5 22. Nxd6 Qxd6 23. Ra1 b4 24. a5 a6 1/2-1/2

[Event "Groningen op 57th"]
[Site "Groningen"]
[Date "2019.12.23"]
[Round "3"]
[White "Wedda, Dries"]
[Black "Boersma, Jan"]
[Result "1/2-1/2"]
[ECO "B27"]
[WhiteElo "2209"]
[BlackElo "2069"]
[PlyCount "45"]
[EventDate "2019.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. c3 Bg7 4. d4 cxd4 5. cxd4 d5 6. e5 Nh6 7. Bb5+ Bd7 8. Bxd7+ Qxd7 9. 0-0 0-0 10. Nc3 Nc6 11. Re1 Rad8 12. Bf4 Nf5 13. g4 Bh6 14. Bxh6 Nxh6 15. h3 Kg7 16. Nh4 f6 17. e6 Qd6 18. Qd2 Rc8 19. Rad1 a6 20. Ng2 Rfd8 21. f4 Na5 22. b3 Qb4 23. Na4 1/2-1/2

[Event "Groningen op 57th"]
[Site "Groningen"]
[Date "2019.12.22"]
[Round "2"]
[White "Boersma, Jan"]
[Black "Bruil, Rembrandt"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "2069"]
[BlackElo "2206"]
[PlyCount "37"]
[EventDate "2019.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. Bb5 Nd4 4. Bc4 a6 5. Nf3 b5 6. Bd5 Rb8 7. Nxd4 cxd4 8. Ne2 Nf6 9. Bb3 Nxe4 10. Nxd4 Bb7 11. d3 Nf6 12. Bf4 d6 13. Qe2 g6 14. 0-0 Qd7 15. a4 Nd5 16. Be5 dxe5 17. Qxe5 Rd8 18. Qxh8 Nf6 19. c3 1/2-1/2

[Event "Groningen op 57th"]
[Site "Groningen"]
[Date "2019.12.21"]
[Round "1"]
[White "Elgersma, Onno"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "2319"]
[BlackElo "2069"]
[PlyCount "115"]
[EventDate "2019.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 g6 3. Nbd2 Bg7 4. e4 d6 5. Bb5+ c6 6. Bd3 0-0 7. 0-0 c5 8. c3 Nc6 9. d5 Nb8 10. a4 e6 11. c4 Na6 12. a5 Re8 13. h3 Nb4 14. Bb1 Bd7 15. Ne1 Qe7 16. Nd3 Nxd3 17. Bxd3 Nh5 18. Nf3 e5 19. Re1 Qf8 20. Bd2 Bh6 21. b4 Bxd2 22. Qxd2 Rac8 23. Rab1 cxb4 24. Rxb4 Rc7 25. Qe3 Nf4 26. Bf1 a6 27. Rb6 Bc8 28. Qa3 Rd8 29. Nd2 Qe7 30. Kh2 Kg7 31. g3 Nh5 32. Qe3 Nf6 33. f4 Nd7 34. Rbb1 Nc5 35. fxe5 dxe5 36. Nf3 Rd6 37. Qa3 f6 38. Rb6 Rxb6 39. axb6 Rd7 40. Qb4 Qd6 41. Nd2 Nxe4 42. c5 Nxc5 43. Rc1 Qxd5 44. Bg2 Qxd2 45. Qxc5 Rd3 46. Qxc8 Rxg3 47. Rc7+ Kh6 48. Qxb7 Qf4 49. Rxh7+ Kg5 50. h4+ Kg4 51. Qd7+ f5 52. Qd1+ Rf3+ 53. Kh1 e4 54. b7 Kg3 55. Bxf3 exf3 56. Qg1+ Kh3 57. Qf1+ Kg3 58. Rh8 1-0

[Event "Hoogeveen op 23rd"]
[Site "Hoogeveen"]
[Date "2019.10.26"]
[Round "9"]
[White "Boersma, Jan"]
[Black "De Boer, Bas"]
[Result "1/2-1/2"]
[ECO "B30"]
[WhiteElo "2070"]
[BlackElo "2142"]
[PlyCount "27"]
[EventDate "2019.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. Nc3 Nc6 4. Bb5 Nge7 5. 0-0 a6 6. Bxc6 Nxc6 7. d4 cxd4 8. Nxd4 Qc7 9. Re1 Bd6 10. h3 Nxd4 11. Qxd4 Be5 12. Qd3 b5 13. Be3 0-0 14. Bd4 1/2-1/2

[Event "Hoogeveen op 23rd"]
[Site "Hoogeveen"]
[Date "2019.10.25"]
[Round "8"]
[White "Tabak, Stefan"]
[Black "Boersma, Jan"]
[Result "0-1"]
[ECO "B25"]
[WhiteElo "2181"]
[BlackElo "2070"]
[PlyCount "74"]
[EventDate "2019.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Nc6 5. d3 d6 6. f4 Nh6 7. Nf3 0-0 8. 0-0 Rb8 9. h3 f5 10. Be3 b5 11. Qd2 b4 12. Nd1 Nd4 13. Kh2 Ba6 14. Re1 Nf7 15. Bf2 e5 16. exf5 gxf5 17. Ne3 Qd7 18. Nh4 Bb7 19. c3 Bxg2 20. Nexg2 bxc3 21. bxc3 Nc6 22. Ne3 Ne7 23. Rab1 d5 24. fxe5 Nxe5 25. Neg2 d4 26. cxd4 cxd4 27. Nf4 N7g6 28. Nfg2 Bf6 29. Qh6 Bxh4 30. gxh4 Nf3+ 31. Kh1 Qc7 32. Nf4 Nxe1 33. Rxb8 Qc6+ 34. Kh2 Rxb8 35. Bxe1 Rb2+ 36. Kg3 Qc1 37. Bf2 Qxf4+ 0-1

[Event "Hoogeveen op 23rd"]
[Site "Hoogeveen"]
[Date "2019.10.24"]
[Round "7"]
[White "Boersma, Jan"]
[Black "Shakhverdian, William"]
[Result "1/2-1/2"]
[ECO "C48"]
[WhiteElo "2070"]
[BlackElo "2109"]
[PlyCount "103"]
[EventDate "2019.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. Bb5 Bc5 5. 0-0 0-0 6. Nxe5 Nxe5 7. d4 a6 8. Be2 Bd6 9. dxe5 Bxe5 10. Bd3 Bxc3 11. bxc3 d5 12. e5 Nd7 13. f4 Re8 14. Qh5 g6 15. Qh6 Qe7 16. Bd2 Nc5 17. Rae1 Nxd3 18. cxd3 Bf5 19. Rf3 Qf8 20. Qh4 Qe7 21. Qf2 c5 22. h3 h5 23. Rg3 c4 24. dxc4 dxc4 25. Be3 b5 26. Bd4 Qe6 27. Qe2 Rad8 28. Qxh5 Rxd4 29. cxd4 Qd7 30. d5 c3 31. Kh2 c2 32. e6 Qxd5 33. exf7+ Qxf7 34. Rxe8+ Qxe8 35. Qxf5 c1Q 36. Rxg6+ Qxg6 37. Qxg6+ Kf8 38. Qd6+ Kf7 39. f5 Qc4 40. Qg6+ Kf8 41. Qf6+ Ke8 42. h4 Qxa2 43. h5 Qg8 44. Qxa6 Qc4 45. Qg6+ Kd7 46. Qg7+ Ke8 47. Qe5+ Kf7 48. g3 Qc6 49. g4 b4 50. Qb8 Qc2+ 51. Kh3 Qc3+ 52. Kh4 1/2-1/2

[Event "Hoogeveen op 23rd"]
[Site "Hoogeveen"]
[Date "2019.10.22"]
[Round "5"]
[White "Boersma, Jan"]
[Black "Slagboom, Leandro"]
[Result "1/2-1/2"]
[ECO "B53"]
[WhiteElo "2070"]
[BlackElo "1954"]
[PlyCount "31"]
[EventDate "2019.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 a6 5. c4 Nc6 6. Qd1 Nf6 7. Nc3 Bg4 8. Be2 g6 9. 0-0 Bg7 10. Be3 0-0 11. Ne1 Bxe2 12. Qxe2 Rc8 13. Rc1 Nd7 14. Nf3 Qa5 15. Rfd1 Qh5 16. b3 1/2-1/2

[Event "Hoogeveen op 23rd"]
[Site "Hoogeveen"]
[Date "2019.10.21"]
[Round "4"]
[White "Merkon, Oseb"]
[Black "Boersma, Jan"]
[Result "0-1"]
[ECO "A16"]
[WhiteElo "1930"]
[BlackElo "2070"]
[PlyCount "96"]
[EventDate "2019.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. c4 g6 2. Nc3 Bg7 3. g3 d6 4. Bg2 Nc6 5. d3 Nf6 6. e4 0-0 7. Nge2 Bd7 8. 0-0 Qc8 9. f4 Bh3 10. f5 Bxg2 11. Kxg2 e6 12. Nf4 Nd4 13. Be3 c5 14. g4 gxf5 15. exf5 Qc6+ 16. Kg3 Kh8 17. Bxd4 cxd4 18. Nb5 e5 19. Nh3 Rg8 20. Ng5 Raf8 21. Qf3 Bh6 22. h4 Bxg5 23. hxg5 Rxg5 24. Qxc6 Rxg4+ 25. Kf2 bxc6 26. Nxd6 Kg7 27. Rg1 h5 28. Rxg4+ hxg4 29. Rh1 c5 30. Ne4 Nxe4+ 31. dxe4 Rb8 32. b3 a5 33. Rh4 a4 34. Rxg4+ Kf6 35. Rg3 a3 36. Rh3 Rg8 37. Rh4 Kg5 38. Rh7 Kf4 39. Rh4+ Rg4 40. Rxg4+ Kxg4 41. Ke2 Kf4 42. Kd3 f6 43. b4 cxb4 44. c5 b3 45. c6 bxa2 46. c7 a1Q 47. c8Q Qd1+ 48. Kc4 Qc2+ 0-1

[Event "Hoogeveen op 23rd"]
[Site "Hoogeveen"]
[Date "2019.10.20"]
[Round "2"]
[White "Boersma, Jan"]
[Black "De Winter, Arthur"]
[Result "0-1"]
[ECO "B30"]
[WhiteElo "2070"]
[BlackElo "1896"]
[PlyCount "78"]
[EventDate "2019.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. Nc3 Nc6 4. Bb5 Nd4 5. Bd3 Ne7 6. Nxd4 cxd4 7. Ne2 Nc6 8. 0-0 Be7 9. f4 0-0 10. c3 dxc3 11. dxc3 d6 12. Be3 b6 13. Qc2 Bb7 14. Rad1 Qc7 15. Ng3 Rac8 16. Qe2 Rfd8 17. Qg4 Kh8 18. Qh3 Kg8 19. f5 exf5 20. Nxf5 Ne5 21. Qg3 Ng6 22. Bd4 Bf8 23. h4 f6 24. h5 Ne5 25. Bc2 Kh8 26. Bb3 Bxe4 27. Nh6 d5 28. Rxf6 Bc5 29. Rf2 Bxd4 30. cxd4 Nf3+ 31. Rxf3 Bxf3 32. Qxf3 gxh6 33. Bxd5 Qg7 34. Be6 Rc2 35. d5 Rf8 36. Qe4 Rff2 37. Bh3 Rce2 38. Qd4 Qxd4 39. Rxd4 Rf8 0-1

[Event "Hoogeveen op 23rd"]
[Site "Hoogeveen"]
[Date "2019.10.19"]
[Round "1"]
[White "Dixit, Nikhil"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "B27"]
[WhiteElo "2358"]
[BlackElo "2070"]
[PlyCount "33"]
[EventDate "2019.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Qxd4 Nf6 5. Bb5 Nc6 6. Bxc6 dxc6 7. Qxd8+ Kxd8 8. Nc3 Bg7 9. Bf4 Be6 10. Be5 Nh5 11. 0-0-0+ Kc8 12. Bxg7 Nxg7 13. Rd2 Kc7 14. Rhd1 Rad8 15. Nd4 Bc8 16. Ndb5+ cxb5 17. Nxb5+ 1-0

[Event "Hoogeveen op 22nd"]
[Site "Hoogeveen"]
[Date "2018.10.27"]
[Round "9"]
[White "Kevlishvili, Robby"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "B37"]
[WhiteElo "2461"]
[BlackElo "2047"]
[PlyCount "53"]
[EventDate "2018.10.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. c4 Nc6 4. d4 cxd4 5. Nxd4 Nf6 6. Nc3 d6 7. Nc2 Bg7 8. Be2 0-0 9. 0-0 b6 10. Rb1 Bb7 11. b3 Nb8 12. f3 Nbd7 13. Bb2 a6 14. a4 Rc8 15. Qd2 Re8 16. Rfd1 Bf8 17. Nd5 e6 18. Nxf6+ Nxf6 19. Kh1 Nh5 20. Qd4 e5 21. Qf2 d5 22. exd5 Bc5 23. Qe1 e4 24. Qc3 f6 25. fxe4 Nf4 26. Bf3 Re5 27. Qd2 1-0

[Event "Hoogeveen op 22nd"]
[Site "Hoogeveen"]
[Date "2018.10.26"]
[Round "8"]
[White "Boersma, Jan"]
[Black "Schippers, Maurice"]
[Result "0-1"]
[ECO "B15"]
[WhiteElo "2047"]
[BlackElo "2272"]
[PlyCount "72"]
[EventDate "2018.10.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 g6 2. Nc3 c6 3. d4 d5 4. Nf3 Bg7 5. h3 dxe4 6. Nxe4 Nd7 7. Bd3 Ngf6 8. Neg5 h6 9. Ne4 Nxe4 10. Bxe4 c5 11. c3 cxd4 12. cxd4 Nf6 13. Bd3 0-0 14. 0-0 b6 15. Qe2 Bb7 16. Be3 Rc8 17. Ba6 Qd5 18. Rac1 e6 19. Bxb7 Qxb7 20. Ne5 Rxc1 21. Rxc1 Rc8 22. Rxc8+ Qxc8 23. b4 Nd5 24. b5 Qc3 25. Nc6 a6 26. a4 Qa1+ 27. Kh2 Qxa4 28. Na7 Nc3 29. Qf3 Nd5 30. Qe2 axb5 31. Nxb5 Qb4 32. Bd2 Qb2 33. Qd3 Ne7 34. Be3 Nf5 35. Qc4 Kh7 36. Nc7 Bxd4 0-1

[Event "Hoogeveen op 22nd"]
[Site "Hoogeveen"]
[Date "2018.10.25"]
[Round "7"]
[White "Elgersma, Onno"]
[Black "Boersma, Jan"]
[Result "0-1"]
[ECO "B36"]
[WhiteElo "2223"]
[BlackElo "2047"]
[PlyCount "80"]
[EventDate "2018.10.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. c4 Nc6 4. d4 cxd4 5. Nxd4 Nf6 6. Nc3 d6 7. Be2 Nxd4 8. Qxd4 Bg7 9. Be3 0-0 10. Qd2 Be6 11. f3 Rc8 12. Nd5 Bxd5 13. exd5 Nd7 14. 0-0 a5 15. Rab1 Nc5 16. b3 b6 17. Rfc1 Qd7 18. Bf1 Qf5 19. Re1 Rfe8 20. a3 Ra8 21. Kh1 Be5 22. Be2 h5 23. Rec1 a4 24. f4 Bg7 25. Bxc5 bxc5 26. Rf1 axb3 27. Rxb3 Reb8 28. Qd1 Bd4 29. Bd3 Qf6 30. f5 Rxb3 31. Qxb3 g5 32. Re1 Kg7 33. a4 g4 34. Qd1 Qh4 35. g3 Qg5 36. Re4 Rxa4 37. Bb1 Rb4 38. Bc2 Rxc4 39. f6+ exf6 40. Kg2 Qxd5 0-1

[Event "Hoogeveen op 22nd"]
[Site "Hoogeveen"]
[Date "2018.10.24"]
[Round "6"]
[White "Boersma, Jan"]
[Black "Clemens, Adrian HP"]
[Result "1-0"]
[ECO "B10"]
[WhiteElo "2047"]
[BlackElo "2153"]
[PlyCount "117"]
[EventDate "2018.10.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 c6 2. c4 d5 3. cxd5 cxd5 4. exd5 Nf6 5. Bb5+ Nbd7 6. Nc3 a6 7. Qa4 g6 8. Be2 Bg7 9. d4 0-0 10. Bf3 Ne8 11. Nge2 Nd6 12. 0-0 Nf6 13. h3 Nf5 14. g3 Nd6 15. Bg2 b5 16. Qd1 Bb7 17. Nf4 Rb8 18. Nd3 a5 19. Ne5 Ra8 20. Nc6 Qd7 21. Re1 Rfe8 22. a3 Ra6 23. Bg5 h6 24. Bxf6 Bxf6 25. Qd3 e6 26. Ne5 Qd8 27. dxe6 Rxe6 28. Bxb7 Nxb7 29. Qxb5 Rab6 30. Qc4 Nd6 31. Qd5 Qe7 32. Qa8+ Qf8 33. Qxf8+ Kxf8 34. Nd5 Rb7 35. Nxg6+ Kg7 36. Nxf6 Kxg6 37. Nd5 Rxe1+ 38. Rxe1 Rxb2 39. Nf4+ Kf6 40. Rc1 Rb3 41. Rc3 Rb2 42. Rf3 Rd2 43. Kg2 Ke7 44. Re3+ Kd7 45. d5 Ra2 46. Rc3 Ne4 47. Rf3 Nd2 48. Re3 Nc4 49. Re4 Nb6 50. Re3 Nc4 51. Rc3 Nxa3 52. Rc6 Nb5 53. Nd3 Nd4 54. Nc5+ Ke7 55. d6+ Kf6 56. Rc8 Ne6 57. d7 Ke7 58. Re8+ Kd6 59. Rxe6+ 1-0

[Event "Hoogeveen op 22nd"]
[Site "Hoogeveen"]
[Date "2018.10.23"]
[Round "5"]
[White "Warakomska, Anna"]
[Black "Boersma, Jan"]
[Result "1/2-1/2"]
[ECO "B74"]
[WhiteElo "2293"]
[BlackElo "2047"]
[PlyCount "40"]
[EventDate "2018.10.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. Nb3 Nf6 6. Nc3 Bg7 7. Be2 0-0 8. 0-0 d6 9. Be3 Be6 10. f3 Nd7 11. Rb1 Nb6 12. Nd4 Bc4 13. b3 Bxe2 14. Ncxe2 d5 15. exd5 Nxd5 16. Bf2 Qa5 17. c4 Ndb4 18. a3 Qxa3 19. Ra1 Qb2 20. Rb1 Qa3 1/2-1/2

[Event "Hoogeveen op 22nd"]
[Site "Hoogeveen"]
[Date "2018.10.22"]
[Round "4"]
[White "Boersma, Jan"]
[Black "Achuthan, Dylan"]
[Result "1-0"]
[ECO "B21"]
[WhiteElo "2047"]
[BlackElo "1751"]
[PlyCount "79"]
[EventDate "2018.10.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 c5 2. f4 Nc6 3. Nf3 e6 4. Bb5 d5 5. exd5 exd5 6. 0-0 Nf6 7. b3 Be7 8. Bb2 0-0 9. Bxc6 bxc6 10. Ne5 Qc7 11. d3 c4 12. Nd2 cxd3 13. cxd3 Ba6 14. Rc1 c5 15. Rf3 Rac8 16. Rg3 d4 17. Bxd4 Qd6 18. Bb2 Rfd8 19. Qf3 Qb6 20. Nec4 Qe6 21. f5 Qd7 22. Ne4 Qc6 23. Ne5 Qb6 24. Nc4 Qc6 25. Re1 Bxc4 26. bxc4 Kf8 27. Bc3 a6 28. a4 h6 29. a5 Rd7 30. Qe2 Kg8 31. Rb1 Kf8 32. Rb6 Qc7 33. Bxf6 Bxf6 34. Rxf6 Qxa5 35. Kf2 Qa1 36. Rb6 Qd4+ 37. Qe3 Qe5 38. h4 a5 39. f6 g6 40. Qxh6+ 1-0

[Event "Hoogeveen op 22nd"]
[Site "Hoogeveen"]
[Date "2018.10.21"]
[Round "2"]
[White "Ingebretsen, Jens E"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "B36"]
[WhiteElo "2160"]
[BlackElo "2047"]
[PlyCount "119"]
[EventDate "2018.10.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. c4 Nc6 4. d4 cxd4 5. Nxd4 Nf6 6. Nc3 d6 7. Be2 Nxd4 8. Qxd4 Bg7 9. Be3 Be6 10. 0-0 0-0 11. Qd2 Qa5 12. Rab1 Rfc8 13. b3 a6 14. Rfc1 Qd8 15. f3 Qf8 16. Bf1 Nd7 17. Nd5 Bxd5 18. exd5 a5 19. Re1 Rc7 20. Rbc1 b6 21. Qf2 Nc5 22. Rc2 Rac8 23. Qe2 Bf6 24. Rb1 Qg7 25. Qd2 h5 26. Kh1 Kh7 27. a3 Nd7 28. Bd3 Nc5 29. b4 Na4 30. f4 Kg8 31. f5 g5 32. bxa5 bxa5 33. Qxa5 Nb2 34. Be2 Nxc4 35. Qb4 Nxe3 36. Rxc7 Rxc7 37. Qb8+ Kh7 38. Qxc7 Nxd5 39. Qc4 Nc3 40. Rb7 d5 41. Qd3 g4 42. Rc7 Ne4 43. Qxd5 Nf2+ 44. Kg1 Bd4 45. Kf1 Bb6 46. Rc1 Qf6 47. g3 e6 48. Qb5 Be3 49. Re1 e5 50. Qd7 Kg7 51. Bc4 Bd4 52. Kg2 Nh3 53. a4 Ng5 54. a5 h4 55. gxh4 Nf3 56. Re4 Nxh4+ 57. Kh1 Nxf5 58. Rxg4+ Kh6 59. Qxf7 Qc6+ 60. Rg2 1-0

[Event "Hoogeveen op 22nd"]
[Site "Hoogeveen"]
[Date "2018.10.20"]
[Round "1"]
[White "Boersma, Jan"]
[Black "Colijn, Stefan"]
[Result "0-1"]
[ECO "C62"]
[WhiteElo "2047"]
[BlackElo "2340"]
[PlyCount "55"]
[EventDate "2018.10.20"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. Bb5 d6 5. d4 exd4 6. Qxd4 Bd7 7. Bxc6 bxc6 8. Bg5 Be7 9. 0-0-0 0-0 10. e5 Ne8 11. Bxe7 Qxe7 12. Rhe1 Be6 13. Qb4 Rd8 14. Qb7 dxe5 15. Qxc6 Rxd1+ 16. Rxd1 Nd6 17. Nd5 Bxd5 18. Qxd5 e4 19. Nd4 Qh4 20. c4 Qxf2 21. c5 Qf4+ 22. Kb1 Ne8 23. Nf5 Nf6 24. Ne7+ Kh8 25. Qxf7 Rxf7 26. Rd8+ Ne8 27. Rxe8+ Rf8 28. c6 0-1

[Event "Hoogeveen op 21st"]
[Site "Hoogeveen"]
[Date "2017.10.28"]
[Round "9"]
[White "Mellema, Andries"]
[Black "Boersma, Jan"]
[Result "1/2-1/2"]
[ECO "B35"]
[WhiteElo "2164"]
[BlackElo "2057"]
[PlyCount "17"]
[EventDate "2017.10.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 181 Extra"]
[Source "ChessBase"]
[SourceDate "2017.12.12"]
[SourceVersion "1"]
[SourceVersionDate "2017.12.12"]
[SourceQuality "1"]

1. Nc3 c5 2. e4 g6 3. Nf3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. Be3 Nf6 7. Bc4 0-0 8. Bb3 Re8 9. 0-0 1/2-1/2

[Event "Hoogeveen op 21st"]
[Site "Hoogeveen"]
[Date "2017.10.27"]
[Round "8"]
[White "Boersma, Jan"]
[Black "Elgersma, Onno"]
[Result "0-1"]
[ECO "C06"]
[WhiteElo "2057"]
[BlackElo "1884"]
[PlyCount "108"]
[EventDate "2017.10.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 181 Extra"]
[Source "ChessBase"]
[SourceDate "2017.12.12"]
[SourceVersion "1"]
[SourceVersionDate "2017.12.12"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. Bd3 c5 5. e5 Nfd7 6. c3 Nc6 7. Ngf3 cxd4 8. cxd4 Be7 9. 0-0 Qb6 10. a3 a5 11. Qa4 g5 12. Nb3 g4 13. Ne1 Qc7 14. Nd2 h5 15. Nc2 Nb6 16. Qb3 Bd7 17. Re1 h4 18. Nf1 0-0-0 19. Bf4 Kb8 20. Rac1 Rdf8 21. Be2 a4 22. Qe3 Rfg8 23. Nb4 Qd8 24. Nxc6+ Bxc6 25. Rc3 Nc4 26. Qc1 Na5 27. Ne3 Nb3 28. Qd1 Qb6 29. Nc2 Na5 30. Bc1 g3 31. hxg3 hxg3 32. fxg3 Nb3 33. Bf4 Rg7 34. Rf1 Rgh7 35. Kf2 Na5 36. Qc1 Rh2 37. g4 R2h4 38. Ke1 Rh1 39. Kf2 Bh4+ 40. Kf3 Rxf1+ 41. Bxf1 Be7 42. Kf2 Nb3 43. Qd1 Ka7 44. Qd3 Rh1 45. g5 Be8 46. Be3 Na5 47. Bc1 Nc4 48. Qg3 Nxb2 49. Qf3 Bb5 50. Bxb5 Nd1+ 51. Kg3 Nxc3 52. Qxc3 Qxb5 53. Be3 Bd8 54. Nb4 Ba5 0-1

[Event "Hoogeveen op 21st"]
[Site "Hoogeveen"]
[Date "2017.10.26"]
[Round "7"]
[White "O'Gorman, Tom"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "B36"]
[WhiteElo "2240"]
[BlackElo "2057"]
[PlyCount "101"]
[EventDate "2017.10.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 181 Extra"]
[Source "ChessBase"]
[SourceDate "2017.12.12"]
[SourceVersion "1"]
[SourceVersionDate "2017.12.12"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. c4 Nf6 6. Nc3 d6 7. Be2 Nxd4 8. Qxd4 Bg7 9. Be3 0-0 10. Qd2 a5 11. 0-0 a4 12. Rad1 Qa5 13. Nd5 Qxd2 14. Nxe7+ Kh8 15. Bxd2 Nxe4 16. Bf3 Nxd2 17. Rxd2 Be6 18. Nd5 Ra5 19. b4 axb3 20. axb3 Ra3 21. Bd1 h5 22. Nc7 Rd8 23. Nb5 Ra6 24. Bf3 Bh6 25. Rdd1 Rb6 26. Bd5 Bxd5 27. Rxd5 Kg8 28. Rfd1 Bf8 29. h3 Ra8 30. R5d2 Ra5 31. Kh2 h4 32. Kg1 Be7 33. Kf1 d5 34. Rxd5 Bb4 35. Re5 Ra2 36. Re2 Rba6 37. Nc7 Ra1 38. Re8+ Kg7 39. Red8 Rxd1+ 40. Rxd1 Ra2 41. Ne8+ Kf8 42. Nf6 Rb2 43. Rd3 Kg7 44. Ng4 Bc5 45. Ne3 Bxe3 46. Rxe3 Kf6 47. g3 hxg3 48. Rxg3 g5 49. Re3 Kg6 50. Kg2 f5 51. Re6+ 1-0

[Event "Hoogeveen op 21st"]
[Site "Hoogeveen"]
[Date "2017.10.25"]
[Round "6"]
[White "Boersma, Jan"]
[Black "Kotyk, Michael"]
[Result "1-0"]
[ECO "C48"]
[WhiteElo "2057"]
[BlackElo "1921"]
[PlyCount "57"]
[EventDate "2017.10.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 181 Extra"]
[Source "ChessBase"]
[SourceDate "2017.12.12"]
[SourceVersion "1"]
[SourceVersionDate "2017.12.12"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. Bb5 Bd6 5. a3 0-0 6. d3 h6 7. g4 Nd4 8. Bc4 Nh7 9. h4 Nxf3+ 10. Qxf3 Qf6 11. Qxf6 Nxf6 12. g5 Nh5 13. g6 c6 14. Nd1 Nf4 15. Bxf7+ Kh8 16. Ne3 Bc7 17. Bd2 a5 18. 0-0-0 d6 19. Nf5 b5 20. Kb1 Bxf5 21. exf5 Nd5 22. Rdg1 Bb6 23. Rh2 Nf6 24. Bxh6 Rxf7 25. gxf7 gxh6 26. Rg6 Nd5 27. Rhg2 Kh7 28. Rg7+ Kh8 29. Rg8+ 1-0

[Event "Hoogeveen op 21st"]
[Site "Hoogeveen"]
[Date "2017.10.24"]
[Round "5"]
[White "Heemskerk, Wim"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "A36"]
[WhiteElo "2179"]
[BlackElo "2057"]
[PlyCount "37"]
[EventDate "2017.10.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 181 Extra"]
[Source "ChessBase"]
[SourceDate "2017.12.12"]
[SourceVersion "1"]
[SourceVersionDate "2017.12.12"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 0-0 5. e4 c5 6. Nge2 Nc6 7. 0-0 d6 8. d3 Bd7 9. h3 Rb8 10. Be3 Ne8 11. Kh2 Nc7 12. d4 cxd4 13. Nxd4 Ne6 14. Nde2 Nc5 15. f4 a5 16. Qd2 Nb4 17. Rad1 Bc6 18. Nd4 Nbd3 19. Qe2 1-0

[Event "Hoogeveen op 21st"]
[Site "Hoogeveen"]
[Date "2017.10.23"]
[Round "4"]
[White "Boersma, Jan"]
[Black "Wempe, Joost"]
[Result "0-1"]
[ECO "C11"]
[WhiteElo "2057"]
[BlackElo "2289"]
[PlyCount "81"]
[EventDate "2017.10.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 181 Extra"]
[Source "ChessBase"]
[SourceDate "2017.12.12"]
[SourceVersion "1"]
[SourceVersionDate "2017.12.12"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 Be7 8. Qd2 b6 9. Be2 f6 10. 0-0-0 0-0 11. Kb1 Kh8 12. h4 c4 13. h5 b5 14. h6 g6 15. f5 gxf5 16. Nxb5 Rb8 17. Nd6 Nb6 18. Bf4 Bxd6 19. exd6 Bd7 20. Qe3 Na4 21. b3 Qa5 22. Ne5 Nc3+ 23. Qxc3 Qxc3 24. Bd2 Qxd4 25. Nxd7 Rfd8 26. Bc1 Qf2 27. Nxb8 Rxb8 28. Bf3 c3 29. Rhe1 Nd4 30. Rxd4 Qxe1 31. d7 Qe5 32. Ra4 Qc7 33. Be3 a5 34. a3 Rd8 35. b4 axb4 36. Ra7 Qd6 37. a4 d4 38. Bf2 Rxd7 39. Bg3 e5 40. Ra8+ Rd8 41. Ra7 0-1

[Event "Hoogeveen op 21st"]
[Site "Hoogeveen"]
[Date "2017.10.21"]
[Round "1"]
[White "Uksini, Bardhyl"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "E76"]
[WhiteElo "2363"]
[BlackElo "2057"]
[PlyCount "63"]
[EventDate "2017.10.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 181 Extra"]
[Source "ChessBase"]
[SourceDate "2017.12.12"]
[SourceVersion "1"]
[SourceVersionDate "2017.12.12"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 0-0 5. f4 d6 6. Nf3 Na6 7. Bd3 e5 8. fxe5 dxe5 9. d5 c6 10. 0-0 cxd5 11. cxd5 Ne8 12. Qe2 Nd6 13. Be3 f5 14. Bf2 f4 15. Nb5 Nxb5 16. Bxb5 g5 17. Rfd1 g4 18. Nh4 g3 19. hxg3 fxg3 20. Bxg3 Qg5 21. Qe1 Bg4 22. Rdc1 Bh6 23. Bxa6 bxa6 24. Rc6 Rab8 25. b3 Rb6 26. Rac1 Rxc6 27. Rxc6 Bd7 28. Rc7 Bb5 29. Nf5 Qh5 30. Bxe5 Rxf5 31. exf5 Qxf5 32. Qg3+ 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2017.07.27"]
[Round "3"]
[White "Kooijmans, Jermo"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "B27"]
[WhiteElo "2272"]
[BlackElo "2095"]
[PlyCount "57"]
[EventDate "2017.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 179 Extra"]
[Source "ChessBase"]
[SourceDate "2017.08.23"]
[SourceVersion "1"]
[SourceVersionDate "2017.08.23"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Qxd4 Nf6 5. Nc3 Nc6 6. Qa4 d6 7. e5 dxe5 8. Nxe5 Bd7 9. Nxd7 Qxd7 10. Be3 Bg7 11. Rd1 Qc8 12. Be2 0-0 13. 0-0 Rd8 14. h3 Qe6 15. Qb5 Rdc8 16. Rfe1 Qe5 17. Qxb7 Rab8 18. Qa6 Nb4 19. Qa4 Qf5 20. Bxa7 Ra8 21. Bf3 Rxa7 22. Qxa7 Nxc2 23. Rxe7 Bf8 24. Rxf7 Bc5 25. Qb7 Bxf2+ 26. Kh1 Re8 27. Nd5 Bh4 28. Ne7+ Rxe7 29. Qxe7 1-0

[Event "Groningen op-A 54th"]
[Site "Groningen"]
[Date "2016.12.30"]
[Round "9"]
[White "Swayams, Mishra"]
[Black "Boersma, Jan"]
[Result "1/2-1/2"]
[ECO "A48"]
[WhiteElo "2473"]
[BlackElo "2088"]
[PlyCount "94"]
[EventDate "2016.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 c5 5. c3 cxd4 6. cxd4 0-0 7. e3 Qb6 8. Nc4 Qb4+ 9. Nfd2 d5 10. a3 Qb5 11. Bxf6 Bxf6 12. Nd6 Qb6 13. Nxc8 Rxc8 14. Rb1 Nd7 15. Be2 Rc7 16. 0-0 Rac8 17. b4 Qd6 18. Nb3 Nb6 19. Nc5 Nc4 20. Bxc4 dxc4 21. Ne4 Qe6 22. Nc3 Bg7 23. Qc2 Qd7 24. Rfd1 h5 25. a4 b6 26. f4 Rd8 27. h3 a6 28. Kh1 Rcc8 29. Qe2 b5 30. axb5 axb5 31. Ra1 Qf5 32. Ra5 Rb8 33. Rd2 Bf8 34. Rb2 Rdc8 35. Qf3 Qd3 36. Ra3 Ra8 37. Rxa8 Rxa8 38. Qxa8 Qxc3 39. Rb1 Qxe3 40. Qc6 c3 41. Qc8 e6 42. Ra1 Qxd4 43. Rc1 Qxb4 44. Rxc3 Qxf4 45. Rf3 Qe5 46. Qe8 Qe1+ 47. Kh2 Qe5+ 1/2-1/2

[Event "Groningen op-A 54th"]
[Site "Groningen"]
[Date "2016.12.28"]
[Round "7"]
[White "Boersma, Jan"]
[Black "Theulings, Paul Peter"]
[Result "1-0"]
[ECO "C48"]
[WhiteElo "2088"]
[BlackElo "2097"]
[PlyCount "99"]
[EventDate "2016.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 176 Extra"]
[Source "ChessBase"]
[SourceDate "2017.03.02"]
[SourceVersion "1"]
[SourceVersionDate "2017.03.02"]
[SourceQuality "1"]

1. e4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. Bb5 Nd4 5. 0-0 Nxb5 6. Nxb5 c6 7. Nc3 d6 8. d4 Qc7 9. a4 Be7 10. Bg5 Bg4 11. Bxf6 Bxf6 12. d5 Rc8 13. h3 Bh5 14. a5 a6 15. dxc6 bxc6 16. Qd3 0-0 17. Nd2 Bg6 18. Qxa6 Ra8 19. Qc4 Rfb8 20. Nd5 Qb7 21. a6 Qc8 22. a7 Rb7 23. Ra6 Rbxa7 24. Rxc6 Qd8 25. b4 Bg5 26. Nb3 Kh8 27. Rd1 Rb8 28. b5 f5 29. b6 Rd7 30. f3 fxe4 31. fxe4 Bf7 32. Kh1 Bf4 33. Qc3 Bxd5 34. Rxd5 Qf8 35. Qf3 Rf7 36. Rd1 Bg5 37. Qd3 Rd8 38. c4 h6 39. Nd2 Bxd2 40. Qxd2 Rf1+ 41. Rxf1 Qxf1+ 42. Kh2 Rf8 43. b7 Kh7 44. Rxd6 Rf2 45. Qxf2 Qxf2 46. b8Q Qf4+ 47. Kg1 Qc1+ 48. Kf2 Qf4+ 49. Ke2 Qxe4+ 50. Kd1 1-0

[Event "Groningen op-A 54th"]
[Site "Groningen"]
[Date "2016.12.27"]
[Round "6"]
[White "Dehn, Marcus"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "A46"]
[WhiteElo "2132"]
[BlackElo "2088"]
[PlyCount "102"]
[EventDate "2016.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 176 Extra"]
[Source "ChessBase"]
[SourceDate "2017.03.02"]
[SourceVersion "1"]
[SourceVersionDate "2017.03.02"]
[SourceQuality "1"]

1. d4 Nf6 2. Nd2 d6 3. Ngf3 c5 4. e3 g6 5. Be2 Bg7 6. 0-0 0-0 7. a4 Qc7 8. Nc4 Nc6 9. c3 Be6 10. Ng5 Bd5 11. dxc5 dxc5 12. e4 Bxc4 13. Bxc4 Ne5 14. Qe2 h6 15. Nf3 Rad8 16. Nxe5 Qxe5 17. f3 e6 18. Be3 Nh5 19. g3 Qc7 20. Rfd1 Kh7 21. Kg2 Bf6 22. Rxd8 Rxd8 23. Rd1 Rxd1 24. Qxd1 Be5 25. Qe1 Bd6 26. Qf2 Ng7 27. Bb5 a6 28. Bc4 Nh5 29. Qe1 Qc6 30. Qd1 Nf6 31. Kf2 Nd7 32. f4 Nf6 33. e5 Ne4+ 34. Kg1 Be7 35. Qf3 Qxa4 36. Qxe4 Qa1+ 37. Bf1 Qxb2 38. Qd3 Kg7 39. c4 h5 40. Qd2 Qb3 41. Bf2 Qa4 42. Qb2 Qd7 43. Qb6 h4 44. gxh4 Qd2 45. Qxb7 Bd8 46. Qxa6 Qxf4 47. Qd6 Qg4+ 48. Bg2 Bc7 49. h3 Qxc4 50. Qxc7 Qc1+ 51. Bf1 Qg5+ 1-0

[Event "Groningen op-A 54th"]
[Site "Groningen"]
[Date "2016.12.24"]
[Round "4"]
[White "Boersma, Jan"]
[Black "Vos, Tjark"]
[Result "0-1"]
[ECO "C15"]
[WhiteElo "2088"]
[BlackElo "2183"]
[PlyCount "62"]
[EventDate "2016.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Nge2 dxe4 5. a3 Be7 6. Nxe4 Nd7 7. Bf4 Ngf6 8. Qd3 b6 9. 0-0-0 Bb7 10. N2c3 0-0 11. Nxf6+ Nxf6 12. Qh3 Nd5 13. Bd3 g6 14. Bd2 Bg5 15. Ne2 Bxd2+ 16. Rxd2 Rc8 17. Qh6 c5 18. dxc5 Rxc5 19. Ng3 Qe7 20. Re1 Ra5 21. c4 Rc8 22. Nh5 Qf8 23. Qg5 Nb4 24. Nf6+ Kh8 25. Qh4 Nxd3+ 26. Rxd3 Rxc4+ 27. Qxc4 Rc5 28. Rc3 Qh6+ 29. f4 Rxc4 30. Rxc4 Qxh2 31. g4 Qh4 0-1

[Event "Groningen op-A 54th"]
[Site "Groningen"]
[Date "2016.12.21"]
[Round "1"]
[White "Warmerdam, Max"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "B35"]
[WhiteElo "2347"]
[BlackElo "2088"]
[PlyCount "71"]
[EventDate "2016.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 0-0 8. Bb3 Re8 9. 0-0 d6 10. h3 Bd7 11. a3 Rc8 12. Nxc6 Bxc6 13. Qf3 Rf8 14. Rad1 Qa5 15. Bd4 Nd7 16. Bxg7 Kxg7 17. Qe3 Qc5 18. Rd4 b5 19. Qd2 Nf6 20. Re1 a5 21. a4 e5 22. Rxd6 b4 23. Nd1 Nxe4 24. Rxe4 Bxe4 25. Ne3 Rc6 26. Rd7 h5 27. f3 Bf5 28. Rd5 Qb6 29. Rb5 Rd6 30. Qf2 Qd8 31. Nxf5+ gxf5 32. Rxe5 Rd1+ 33. Kh2 Qd6 34. f4 Rd2 35. Qe3 Kf6 36. Qg3 1-0

[Event "Hoogeveen Unive op 20th"]
[Site "Hoogeveen"]
[Date "2016.10.22"]
[Round "9"]
[White "Boersma, Jan"]
[Black "Taams, Sander"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "2099"]
[BlackElo "1857"]
[PlyCount "57"]
[EventDate "2016.10.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. Nge2 e6 4. g3 Nge7 5. Bg2 g6 6. d4 cxd4 7. Nxd4 Bg7 8. Ndb5 0-0 9. 0-0 b6 10. Bf4 Ba6 11. Re1 Bxb5 12. Nxb5 d5 13. exd5 Nxd5 14. Bd6 Re8 15. c4 Bxb2 16. cxd5 Nd4 17. Nxd4 Bxa1 18. Ba3 Bxd4 19. Qxd4 exd5 20. Rxe8+ Qxe8 21. Bb2 Kf8 22. Bxd5 Rd8 23. Qg7+ Ke7 24. Qf6+ Kf8 25. Ba3+ Kg8 26. Bxf7+ Qxf7 27. Qxd8+ Kg7 28. Bb2+ Kh6 29. Qh4# 1-0

[Event "Hoogeveen Unive op 20th"]
[Site "Hoogeveen"]
[Date "2016.10.21"]
[Round "8"]
[White "Van Dael, Siem"]
[Black "Boersma, Jan"]
[Result "0-1"]
[ECO "B39"]
[WhiteElo "1995"]
[BlackElo "2099"]
[PlyCount "62"]
[EventDate "2016.10.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. c4 Nf6 6. Nc3 d6 7. Be2 Nxd4 8. Qxd4 Bg7 9. Be3 0-0 10. Qd2 Nd7 11. 0-0 Nc5 12. f3 a5 13. b3 Bd7 14. Rfc1 Be5 15. Bf1 Bc6 16. Rab1 f5 17. exf5 gxf5 18. a3 a4 19. bxa4 Nxa4 20. Nd5 Nc5 21. Qe1 Bxd5 22. cxd5 b6 23. Rb5 Rxa3 24. Rcb1 Qe8 25. Rxb6 Qh5 26. f4 Bf6 27. Bxc5 dxc5 28. Bc4 Bd4+ 29. Kh1 Rh3 30. d6+ e6 31. Qxe6+ Kh8 0-1

[Event "Hoogeveen Unive op 20th"]
[Site "Hoogeveen"]
[Date "2016.10.20"]
[Round "7"]
[White "Boersma, Jan"]
[Black "Schoehuys, Erik"]
[Result "1/2-1/2"]
[ECO "C65"]
[WhiteElo "2099"]
[BlackElo "2169"]
[PlyCount "107"]
[EventDate "2016.10.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. Qe2 Bc5 5. 0-0 0-0 6. c3 d6 7. h3 Bd7 8. Rd1 a6 9. Ba4 Ba7 10. Bc2 Re8 11. d3 Ne7 12. Nh4 Ng6 13. Nxg6 fxg6 14. Be3 Bxe3 15. fxe3 Nh5 16. Nd2 Qe7 17. Nf3 Rf8 18. g4 Nf6 19. Bb3+ Kh8 20. Qg2 Bc6 21. Rf1 Nd7 22. Qg3 Nc5 23. Bc2 g5 24. Rf2 g6 25. Raf1 Kg7 26. Bb1 h6 27. c4 a5 28. b3 b5 29. h4 gxh4 30. Nxh4 Qg5 31. Rxf8 Rxf8 32. Rxf8 Kxf8 33. Kf2 bxc4 34. bxc4 Bd7 35. Kf3 Kg7 36. Bc2 Ba4 37. Bxa4 Nxa4 38. Kf2 Nc3 39. Nf3 Qf6 40. Qg1 Nxa2 41. Qa1 Nb4 42. Qxa5 Nxd3+ 43. Ke2 Nc1+ 44. Kf2 Nd3+ 45. Ke2 Nc5 46. Qxc7+ Qf7 47. Qxd6 Qxc4+ 48. Ke1 Qc1+ 49. Ke2 Qb2+ 50. Nd2 Qb5+ 51. Kf3 Nd7 52. Qe7+ Kg8 53. Qe6+ Kg7 54. Qe7+ 1/2-1/2

[Event "Hoogeveen Unive op 20th"]
[Site "Hoogeveen"]
[Date "2016.10.19"]
[Round "6"]
[White "Eck, Mathias"]
[Black "Boersma, Jan"]
[Result "1/2-1/2"]
[ECO "A15"]
[WhiteElo "2082"]
[BlackElo "2099"]
[PlyCount "91"]
[EventDate "2016.10.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. c4 Nf6 2. Nf3 g6 3. e3 Bg7 4. b3 Ne4 5. d4 c5 6. Bd3 Qa5+ 7. Kf1 Nf6 8. Bd2 Qc7 9. Nc3 d6 10. Rc1 0-0 11. h3 b6 12. Kg1 Bb7 13. d5 Nbd7 14. e4 a6 15. Bf4 Ne5 16. Nxe5 dxe5 17. Be3 Rae8 18. Be2 Rd8 19. g4 Ne8 20. Bd3 Nd6 21. Qf3 Bc8 22. Qg2 f6 23. h4 Bd7 24. h5 g5 25. h6 Bh8 26. Ne2 a5 27. a4 Qc8 28. f3 Kf7 29. Ng3 Rg8 30. Nf5 Rg6 31. Rc2 Qc7 32. Qf2 Ra8 33. Qd2 Kf8 34. Qd1 Nf7 35. Rch2 Nd6 36. Bc2 Kf7 37. Rh3 Rgg8 38. Qd2 Rg6 39. Rh5 Rag8 40. Qf2 Ra8 41. Kf1 Rgg8 42. Qd2 Rg6 43. Bd3 Rag8 44. Ke1 Ra8 45. Bc2 Rag8 46. Qf2 1/2-1/2

[Event "Hoogeveen Unive op 20th"]
[Site "Hoogeveen"]
[Date "2016.10.18"]
[Round "4"]
[White "Wedda, Dries"]
[Black "Boersma, Jan"]
[Result "1/2-1/2"]
[ECO "E81"]
[WhiteElo "1994"]
[BlackElo "2099"]
[PlyCount "51"]
[EventDate "2016.10.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. f3 c5 4. d5 d6 5. e4 Bg7 6. Nc3 0-0 7. Nge2 e6 8. Ng3 h5 9. Bg5 exd5 10. cxd5 Nbd7 11. Be2 a6 12. a4 Qc7 13. Qd2 Re8 14. 0-0 Rb8 15. Rac1 c4 16. b3 Nc5 17. Bxc4 Nxb3 18. Bxb3 Qb6+ 19. Be3 Qxb3 20. Rc2 Nd7 21. Nge2 Ne5 22. Rb1 Qc4 23. Nb5 axb5 24. Rxc4 Nxc4 25. Qd3 Nxe3 26. Qxe3 1/2-1/2

[Event "Hoogeveen Unive op 20th"]
[Site "Hoogeveen"]
[Date "2016.10.17"]
[Round "3"]
[White "Boersma, Jan"]
[Black "Mesman, Edwyn"]
[Result "1/2-1/2"]
[ECO "B73"]
[WhiteElo "2099"]
[BlackElo "1979"]
[PlyCount "21"]
[EventDate "2016.10.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. Nc3 c5 2. e4 Nc6 3. Nge2 g6 4. d4 cxd4 5. Nxd4 Bg7 6. Be3 d6 7. Be2 Nf6 8. 0-0 0-0 9. Qd2 d5 10. Nxc6 bxc6 11. Rad1 1/2-1/2

[Event "Hoogeveen Unive op 20th"]
[Site "Hoogeveen"]
[Date "2016.10.16"]
[Round "2"]
[White "Nguyen, Kevin"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "B25"]
[WhiteElo "2185"]
[BlackElo "2099"]
[PlyCount "101"]
[EventDate "2016.10.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Nc6 5. d3 d6 6. f4 e6 7. Nf3 Nge7 8. 0-0 0-0 9. Qe1 Nd4 10. Qf2 Rb8 11. Be3 Nec6 12. Nd1 b5 13. Nh4 Ne7 14. c3 Ndc6 15. f5 exf5 16. exf5 gxf5 17. Bg5 f6 18. Bf4 Ne5 19. Qe2 Bb7 20. Ne3 Bxg2 21. Kxg2 Qd7 22. Qh5 Nxd3 23. Nexf5 Nxf4+ 24. Rxf4 Nxf5 25. Nxf5 Rf7 26. Rh4 Bf8 27. Rf1 Re8 28. Rff4 Kh8 29. Kh3 Re5 30. Qg6 Qe6 31. Rfg4 Rc7 32. Rh5 Rg7 33. Nxg7 Rxh5+ 34. Qxh5 Bxg7 35. b4 Bf8 36. a3 a6 37. Kh4 Qa2 38. h3 Qd2 39. Rf4 Qxc3 40. Qf7 Bh6 41. Qxf6+ Qxf6+ 42. Rxf6 cxb4 43. axb4 Bd2 44. Rxd6 Bxb4 45. Rxa6 Bc3 46. Rb6 b4 47. Rb7 Kg8 48. Kh5 Be1 49. g4 Bc3 50. Kh6 Bd2+ 51. g5 1-0

[Event "Hoogeveen Unive op 20th"]
[Site "Hoogeveen"]
[Date "2016.10.15"]
[Round "1"]
[White "Boersma, Jan"]
[Black "Harsha, Bharathakoti"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "2099"]
[BlackElo "2363"]
[PlyCount "96"]
[EventDate "2016.10.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. Bf4 c5 4. e3 Nc6 5. Nbd2 Qb6 6. dxc5 Qxb2 7. Rb1 Qc3 8. Bb5 Qxc5 9. 0-0 Bd7 10. Bd3 Nd8 11. Nb3 Qc8 12. Nfd4 e6 13. Be5 Be7 14. Qf3 0-0 15. g4 Nc6 16. Nxc6 Bxc6 17. Nd4 Ne4 18. Qh3 f6 19. Bg3 g6 20. Bxe4 dxe4 21. g5 Bd7 22. Qh4 f5 23. Bf4 Rd8 24. Qg3 Be8 25. h4 Rd5 26. c4 Rd8 27. Rfc1 b6 28. Nb5 Bxb5 29. cxb5 Bc5 30. Be5 Rd5 31. a4 Qe8 32. Bf6 Bd6 33. Qh3 Rc8 34. Rxc8 Qxc8 35. h5 Qe8 36. hxg6 Qxg6 37. Rc1 Rc5 38. Rxc5 Bxc5 39. Qg3 Bf8 40. Bd4 h6 41. gxh6 Qxg3+ 42. fxg3 Bxh6 43. a5 bxa5 44. Bxa7 Bf8 45. Bb8 a4 46. b6 a3 47. b7 a2 48. Be5 Bd6 0-1

[Event "Dieren op"]
[Site "Dieren"]
[Date "2016.08.03"]
[Round "8"]
[White "Schippers, Maurice"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "B39"]
[WhiteElo "2220"]
[BlackElo "2094"]
[PlyCount "139"]
[EventDate "2016.07.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. c4 Nf6 6. Nc3 d6 7. Be2 Nxd4 8. Qxd4 Bg7 9. Be3 0-0 10. Qd2 Nd7 11. 0-0 Nc5 12. f3 a5 13. Rfd1 Be6 14. Qe1 Qb6 15. Rab1 Qb4 16. Rdc1 a4 17. Nd5 Qxe1+ 18. Rxe1 Bxd5 19. exd5 Bf6 20. Kf2 Rfc8 21. Red1 h5 22. g3 Na6 23. f4 Nb4 24. Bd2 Na6 25. Kf3 Nc5 26. Be3 Ra6 27. Rd2 Raa8 28. Bf1 Kf8 29. h3 Na6 30. Rdd1 Nb4 31. Bd2 Na6 32. g4 hxg4+ 33. hxg4 Nc5 34. g5 Bg7 35. Be3 Na6 36. Be2 Nb4 37. Bd2 Na6 38. Rh1 Kg8 39. Rh2 Nc5 40. Rhh1 Bd4 41. Rhd1 Bg7 42. Be3 Ra6 43. Rd2 Raa8 44. Bf1 Na6 45. Rh2 Nb4 46. a3 Na6 47. Re1 Kf8 48. Kg4 Nc5 49. Kf3 Nb3 50. Rd1 Kg8 51. Kg4 Nc5 52. Kf3 Nb3 53. Rg2 Kf8 54. f5 Be5 55. Bd3 Kg7 56. Rh1 Rh8 57. Rh6 gxf5 58. Bxf5 Nd4+ 59. Kg4 Nxf5 60. Kxf5 Rac8 61. c5 Rce8 62. Rxh8 Rxh8 63. Rc2 Kf8 64. g6 Rh5+ 65. Kg4 fxg6 66. c6 bxc6 67. dxc6 d5 68. Bf4 Rh4+ 69. Kxh4 Bxf4 70. c7 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2016.07.29"]
[Round "4"]
[White "Gerlagh, Joris"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "B35"]
[WhiteElo "2172"]
[BlackElo "2094"]
[PlyCount "67"]
[EventDate "2016.07.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. Be3 Nf6 6. Nc3 Bg7 7. Bc4 0-0 8. Bb3 Re8 9. f3 e6 10. 0-0 d5 11. exd5 exd5 12. Bf2 Na5 13. Qd3 Nxb3 14. axb3 Nh5 15. Rfe1 Be6 16. Qd2 a6 17. Nde2 Rc8 18. Bd4 Bf8 19. Ng3 Qh4 20. Nxh5 Qxh5 21. Re5 Qh4 22. g3 Qd8 23. Rae1 Qd7 24. Qe3 Bg7 25. h4 h5 26. g4 hxg4 27. h5 gxf3 28. h6 Bf6 29. Qf4 Bh8 30. h7+ Kf8 31. Rxd5 f2+ 32. Kxf2 g5 33. Bxh8 Bxd5 34. Bf6 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2016.07.26"]
[Round "1"]
[White "Boersma, Jan"]
[Black "Geurink, Jasper"]
[Result "0-1"]
[ECO "C01"]
[WhiteElo "2094"]
[BlackElo "2359"]
[PlyCount "76"]
[EventDate "2016.07.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. c4 Nf6 5. Nc3 Be7 6. Bd3 dxc4 7. Bxc4 0-0 8. Nge2 a6 9. a3 b5 10. Ba2 Bb7 11. 0-0 Nbd7 12. Qd3 Ne5 13. Qc2 Ng6 14. Bg5 Qd7 15. f3 Nd5 16. Bxd5 Bxd5 17. Bxe7 Nxe7 18. Ne4 c6 19. Rac1 a5 20. N2g3 Rad8 21. Rfd1 a4 22. Nc5 Qc8 23. Qd2 Ng6 24. Qg5 Rde8 25. Re1 Rxe1+ 26. Rxe1 Re8 27. Qd2 h6 28. Kf2 Rd8 29. Qe3 Qc7 30. Kg1 Kh7 31. Nf5 Qc8 32. g4 Qc7 33. Nd3 Be6 34. Ne5 Ra8 35. Qc3 Bd5 36. Kf2 f6 37. Nxg6 Qxh2+ 38. Kf1 Bc4+ 0-1

[Event "Groningen op-A 53rd"]
[Site "Groningen"]
[Date "2015.12.27"]
[Round "6"]
[White "Drozdowski, Konrad"]
[Black "Boersma, Jan"]
[Result "1/2-1/2"]
[ECO "B37"]
[WhiteElo "1987"]
[BlackElo "2083"]
[PlyCount "80"]
[EventDate "2015.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 170 Extra"]
[Source "ChessBase"]
[SourceDate "2016.02.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.02.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. c4 Nc6 4. d4 cxd4 5. Nxd4 Nf6 6. Nc3 d6 7. Nc2 Bg7 8. Be2 0-0 9. Be3 Nd7 10. Qd2 Nc5 11. f3 a5 12. 0-0 a4 13. Na3 Qa5 14. Rfc1 Be6 15. Kh1 Rfc8 16. Rab1 Nd7 17. Qd1 Nb4 18. Bd2 Nc6 19. Nd5 Qd8 20. Nb5 Qf8 21. Ndc7 Rab8 22. Nxe6 fxe6 23. Qxa4 Ra8 24. Qd1 Rxa2 25. Nc3 Raa8 26. b4 Nd4 27. Be3 e5 28. Ra1 Bh6 29. Nd5 Bxe3 30. Nxe3 Nf6 31. Nc2 Nxc2 32. Rxc2 Qh6 33. Rca2 Rxa2 34. Rxa2 Qe3 35. Qd2 Qxd2 36. Rxd2 Ra8 37. Kg1 Ra1+ 38. Rd1 Ra2 39. Kf2 Rb2 40. c5 Rxb4 1/2-1/2

[Event "Groningen op-A 53rd"]
[Site "Groningen"]
[Date "2015.12.26"]
[Round "5"]
[White "Hilwerda, Jonas"]
[Black "Boersma, Jan"]
[Result "1/2-1/2"]
[ECO "B27"]
[WhiteElo "2012"]
[BlackElo "2083"]
[PlyCount "41"]
[EventDate "2015.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 170 Extra"]
[Source "ChessBase"]
[SourceDate "2016.02.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.02.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Qxd4 Nf6 5. Bb5 Nc6 6. Bxc6 dxc6 7. Qxd8+ Kxd8 8. Nc3 Bg7 9. Bf4 Nh5 10. Be3 Be6 11. Bd4 Kc7 12. e5 Bc4 13. Be3 Be6 14. h3 Bf8 15. 0-0-0 Ng7 16. g4 h6 17. Nd4 Bd7 18. f4 h5 19. g5 Nf5 20. Nxf5 Bxf5 21. h4 1/2-1/2

[Event "Groningen op-A 53rd"]
[Site "Groningen"]
[Date "2015.12.23"]
[Round "3"]
[White "Boersma, Jan"]
[Black "Van Baar, Esper"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "2083"]
[BlackElo "2002"]
[PlyCount "42"]
[EventDate "2015.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 170 Extra"]
[Source "ChessBase"]
[SourceDate "2016.02.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.02.25"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 d6 3. f4 Nf6 4. Nf3 g6 5. Bb5+ Bd7 6. Bc4 Bg7 7. d3 0-0 8. 0-0 Nc6 9. a3 a6 10. h3 b5 11. Ba2 e6 12. Be3 Qc7 13. Qd2 Rab8 14. Rae1 b4 15. axb4 cxb4 16. Nd1 Na5 17. Bb1 Rfc8 18. g4 Ba4 19. Rf2 Nd7 20. f5 exf5 21. gxf5 Ne5 1/2-1/2

[Event "Groningen op-A 53rd"]
[Site "Groningen"]
[Date "2015.12.22"]
[Round "2"]
[White "Heemskerk, Wim"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "A39"]
[WhiteElo "2181"]
[BlackElo "2083"]
[PlyCount "59"]
[EventDate "2015.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 170 Extra"]
[Source "ChessBase"]
[SourceDate "2016.02.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.02.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 0-0 5. 0-0 c5 6. d4 cxd4 7. Nxd4 Nc6 8. Nc3 Qa5 9. Nb3 Qh5 10. Nd5 d6 11. Nf4 Qe5 12. Re1 Bg4 13. h3 Bd7 14. e4 Rfc8 15. Nd5 Rab8 16. c5 Be8 17. f4 Qe6 18. cxd6 exd6 19. Bd2 Ne7 20. Nxe7+ Qxe7 21. Bb4 Rd8 22. e5 Nh5 23. Bxd6 Qe6 24. Nc5 Qc8 25. Ne4 Bc6 26. Qb3 Ra8 27. Rad1 h6 28. Kh2 Qf5 29. Bf3 Nxf4 30. Bg4 1-0

[Event "Groningen op-A 53rd"]
[Site "Groningen"]
[Date "2015.12.21"]
[Round "1"]
[White "Boersma, Jan"]
[Black "Wacker, Peter"]
[Result "0-1"]
[ECO "C25"]
[WhiteElo "2083"]
[BlackElo "2335"]
[PlyCount "80"]
[EventDate "2015.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 170 Extra"]
[Source "ChessBase"]
[SourceDate "2016.02.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.02.25"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nc6 3. Bc4 Bc5 4. d3 d6 5. Nge2 Nf6 6. h3 Be6 7. 0-0 d5 8. exd5 Nxd5 9. Ne4 Be7 10. N2g3 0-0 11. Qh5 g6 12. Qh6 f6 13. Bd2 Qd7 14. Bxd5 Bxd5 15. Bc3 Qd8 16. f4 Bxe4 17. dxe4 exf4 18. Rxf4 Bc5+ 19. Kh1 Be3 20. Raf1 Qd6 21. e5 Bxf4 22. Rxf4 fxe5 23. Rg4 Qe7 24. h4 Kh8 25. Rxg6 Rf4 26. Qxf4 hxg6 27. h5 g5 28. Qg4 Rf8 29. Bd2 Nd4 30. Ne4 Ne6 31. Bc3 Kh7 32. Bxe5 Kh6 33. Ng3 Qf7 34. Qe4 c6 35. Bd6 Rh8 36. Kg1 Nf4 37. Bxf4 gxf4 38. Qe5 Rf8 39. Ne4 Qf5 40. Qd6+ Kxh5 0-1

[Event "Hoogeveen Unive op 19th"]
[Site "Hoogeveen"]
[Date "2015.10.24"]
[Round "9"]
[White "Boersma, Jan"]
[Black "Kossen, Johannes"]
[Result "1-0"]
[ECO "B20"]
[WhiteElo "2153"]
[BlackElo "2029"]
[PlyCount "23"]
[EventDate "2015.10.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. e4 c5 2. a3 g6 3. Nc3 Bg7 4. f4 e6 5. Nf3 Nc6 6. b4 cxb4 7. axb4 Nxb4 8. Ba3 Nc6 9. Nb5 Nge7 10. Bd6 Kf8 11. Bc7 Qe8 12. Nd6 1-0

[Event "Hoogeveen Unive op 19th"]
[Site "Hoogeveen"]
[Date "2015.10.23"]
[Round "8"]
[White "De Wolf, Kees"]
[Black "Boersma, Jan"]
[Result "1/2-1/2"]
[ECO "E73"]
[WhiteElo "1982"]
[BlackElo "2153"]
[PlyCount "43"]
[EventDate "2015.10.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 0-0 5. Be2 d6 6. h3 a6 7. Be3 b6 8. Nf3 Bb7 9. Nd2 e6 10. 0-0 c5 11. d5 Nbd7 12. a4 e5 13. Bg5 h6 14. Bh4 Bc8 15. g4 Qe8 16. Bd3 Nh7 17. Kh2 Bf6 18. Bg3 Qe7 19. Nf3 Nb8 20. Qd2 Kg7 21. Rg1 a5 22. Kg2 1/2-1/2

[Event "Hoogeveen Unive op 19th"]
[Site "Hoogeveen"]
[Date "2015.10.22"]
[Round "7"]
[White "Boersma, Jan"]
[Black "Berghuis, Marten"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "2153"]
[BlackElo "1981"]
[PlyCount "106"]
[EventDate "2015.10.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. f4 e6 4. Nf3 d5 5. Bb5 Nge7 6. exd5 exd5 7. Qe2 Bg4 8. 0-0 Qd6 9. Bxc6+ Qxc6 10. h3 Bxf3 11. Qxf3 0-0-0 12. a4 a6 13. f5 g6 14. fxg6 fxg6 15. d3 Nf5 16. Bf4 Bg7 17. a5 Nd4 18. Qg4+ Qe6 19. Na4 Rdf8 20. Nb6+ Kd8 21. Qg5+ Bf6 22. Qxd5+ Qxd5 23. Bc7+ Kxc7 24. Nxd5+ Kc6 25. Nxf6 Nxc2 26. Rac1 Ne3 27. Rxc5+ Kxc5 28. Nd7+ Kb5 29. Nxf8 Kxa5 30. Rf7 b5 31. Nxh7 Kb4 32. Rd7 Nc2 33. Ng5 Ra8 34. Ne4 a5 35. Nc3 a4 36. Rd5 Rb8 37. Nd1 Kb3 38. Kf2 Nb4 39. Rd6 Kc2 40. Ke2 Re8+ 41. Ne3+ Kxb2 42. Kd2 Rxe3 43. Kxe3 a3 44. Kd4 a2 45. Kc5 a1Q 46. Kxb5 Qa8 47. Rxg6 Qe8+ 48. Kxb4 Qxg6 49. d4 Qxg2 50. Kc5 Qxh3 51. d5 Qd7 52. d6 Kc3 53. Kd5 Kb4 0-1

[Event "Hoogeveen Unive op 19th"]
[Site "Hoogeveen"]
[Date "2015.10.21"]
[Round "6"]
[White "Hummel, Joop"]
[Black "Boersma, Jan"]
[Result "1/2-1/2"]
[ECO "E76"]
[WhiteElo "1990"]
[BlackElo "2153"]
[PlyCount "127"]
[EventDate "2015.10.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 0-0 5. f4 d6 6. Nf3 Na6 7. Bd3 Bg4 8. 0-0 e5 9. fxe5 dxe5 10. d5 c6 11. Be3 cxd5 12. cxd5 Ne8 13. Bxa6 bxa6 14. Qd3 Bc8 15. b3 Nd6 16. Rac1 f5 17. Bc5 Bb7 18. Bxd6 Qxd6 19. Ng5 Bh6 20. Qg3 Qf6 21. h4 f4 22. Qg4 Bc8 23. Ne6 Re8 24. h5 Bxe6 25. dxe6 Qxe6 26. Qxe6+ Rxe6 27. Nd5 Rf8 28. hxg6 hxg6 29. Rc7 Rf7 30. Rfc1 Bf8 31. Kf2 g5 32. Kf3 g4+ 33. Kxg4 Rg6+ 34. Kf3 Rg3+ 35. Kf2 Rd3 36. Rxf7 Kxf7 37. Rc7+ Kg6 38. Ke2 Rg3 39. Kf1 f3 40. gxf3 Rxf3+ 41. Ke2 Rh3 42. Rc6+ Kg5 43. Rxa6 Bc5 44. b4 Bd4 45. a4 Rb3 46. Kd2 Ra3 47. a5 Kg4 48. Ke2 Kg5 49. Rf6 Rb3 50. Rf1 Kg6 51. Kd2 Ra3 52. Kc2 Rg3 53. Rb1 Ra3 54. Rb3 Ra1 55. Rf3 Ra2+ 56. Kb3 Re2 57. Nc3 Re1 58. b5 Kg5 59. b6 axb6 60. axb6 Bxb6 61. Rf5+ Kg6 62. Rxe5 Bd4 63. Re7 Re3 64. Rc7 1/2-1/2

[Event "Hoogeveen Unive op 19th"]
[Site "Hoogeveen"]
[Date "2015.10.20"]
[Round "5"]
[White "Boersma, Jan"]
[Black "Van Dael, Siem"]
[Result "1-0"]
[ECO "C28"]
[WhiteElo "2153"]
[BlackElo "1978"]
[PlyCount "71"]
[EventDate "2015.10.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. Bc4 Nc6 4. d3 Bc5 5. Bg5 d6 6. Nd5 h6 7. Bxf6 gxf6 8. Qh5 Be6 9. Ne2 Bxd5 10. Bxd5 Qd7 11. c3 Rh7 12. Ng3 0-0-0 13. Nf5 Kb8 14. Bxc6 Qxc6 15. 0-0 d5 16. Qf3 d4 17. c4 a5 18. Rfb1 Rg8 19. a3 a4 20. b4 axb3 21. a4 Rg5 22. Rxb3 Rh8 23. Rb5 Rhg8 24. g3 b6 25. Nxh6 Rf8 26. Nf5 Rh8 27. a5 Rhh5 28. Kg2 Rxf5 29. Qe2 Rfg5 30. axb6 cxb6 31. Qa2 Kc7 32. Qa7+ Kd8 33. Qxf7 Rh8 34. Ra6 Qc8 35. Qxf6+ Kd7 36. Rxc5 1-0

[Event "Hoogeveen Unive op 19th"]
[Site "Hoogeveen"]
[Date "2015.10.19"]
[Round "4"]
[White "Bekedam, Tyro"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "B35"]
[WhiteElo "1981"]
[BlackElo "2153"]
[PlyCount "27"]
[EventDate "2015.10.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. Be3 Bg7 6. Nc3 Nf6 7. Bc4 Qa5 8. 0-0 0-0 9. Bb3 d6 10. h3 Bd7 11. Qd2 Nxe4 12. Nxc6 Bxc3 13. Nxe7+ Kh8 14. Bd4+ 1-0

[Event "Hoogeveen Unive op 19th"]
[Site "Hoogeveen"]
[Date "2015.10.18"]
[Round "2"]
[White "Boersma, Jan"]
[Black "Brantjes, Yme"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "2153"]
[BlackElo "1962"]
[PlyCount "76"]
[EventDate "2015.10.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. f4 e6 4. Nf3 d5 5. Bb5 Nge7 6. 0-0 a6 7. Bxc6+ Nxc6 8. d3 Be7 9. e5 b5 10. b3 0-0 11. Ne2 Qc7 12. Be3 Bd7 13. Ng3 a5 14. Nh5 g6 15. Ng3 a4 16. Qd2 Ra6 17. c4 bxc4 18. bxc4 d4 19. Bf2 Rb8 20. Ne4 Rab6 21. Bh4 Bxh4 22. Nxh4 Rb2 23. Qd1 Ne7 24. Qg4 Bc6 25. Nf6+ Kh8 26. Qh3 Nf5 27. Nf3 h5 28. g4 Ne3 29. gxh5 g5 30. fxg5 Nxf1 31. Rxf1 Bxf3 32. Qxf3 Qxe5 33. Ng4 Qxg5 34. Kh1 Rb1 35. Nf6 Qe3 36. Kg2 R8b2+ 37. Rf2 Rxf2+ 38. Kg3 Rxa2 0-1

[Event "Hoogeveen Unive op 19th"]
[Site "Hoogeveen"]
[Date "2015.10.17"]
[Round "1"]
[White "Ernst, Sipke"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "E91"]
[WhiteElo "2527"]
[BlackElo "2153"]
[PlyCount "93"]
[EventDate "2015.10.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 0-0 5. e4 d6 6. Be2 c5 7. 0-0 Bg4 8. Be3 Bxf3 9. Bxf3 cxd4 10. Bxd4 Nc6 11. Be3 Nd7 12. Rc1 Nc5 13. Re1 Nb4 14. Be2 Bxc3 15. Rxc3 Nxa2 16. Ra3 Nb4 17. e5 a5 18. Bf3 Qc7 19. exd6 Qxd6 20. Qxd6 exd6 21. Re2 Rfe8 22. Kf1 Ne4 23. Bb6 f5 24. Rxa5 Rxa5 25. Bxa5 Nd3 26. g3 Kf7 27. h4 h5 28. Bb6 Re6 29. Ba7 Re8 30. Bd4 Re7 31. Bxe4 fxe4 32. Rc2 Nb4 33. Rd2 Ke6 34. Ke2 Rf7 35. Be3 Nd3 36. Rc2 Rf5 37. Bd4 Rf3 38. Bb6 Nb4 39. Rd2 Nd3 40. Be3 Nc1+ 41. Kd1 Nd3 42. Re2 Ne5 43. Rc2 Ng4 44. Ba7 e3 45. fxe3 Rxe3 46. Re2 Nf2+ 47. Rxf2 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2015.07.30"]
[Round "9"]
[White "Boersma, Jan"]
[Black "Hamblok, Roel"]
[Result "0-1"]
[ECO "C50"]
[WhiteElo "2119"]
[BlackElo "2305"]
[PlyCount "112"]
[EventDate "2015.07.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Bc5 3. Bc4 Nf6 4. d3 Nc6 5. Nf3 d6 6. h3 h6 7. Be3 Bb6 8. 0-0 Be6 9. Bb3 0-0 10. Qd2 Re8 11. Bxe6 fxe6 12. Bxb6 axb6 13. a3 Qd7 14. Rad1 Re7 15. d4 exd4 16. Nxd4 Rf8 17. Qe2 Nxd4 18. Rxd4 e5 19. Rd3 Qe8 20. Nd5 Nxd5 21. Rxd5 Rf4 22. g3 Qg6 23. Rd2 Rxe4 24. Qd3 Kh7 25. c3 Ra4 26. Qd5 Ra7 27. Re1 Re6 28. Qb3 Ra8 29. Kg2 Rf8 30. Re3 Ref6 31. Qc2 Qxc2 32. Rxc2 b5 33. f3 R8f7 34. h4 Kg6 35. Rd2 c6 36. Rdd3 Re7 37. Re4 d5 38. Rg4+ Kf7 39. Re3 Rf5 40. Rb4 Ke6 41. Kf2 Kd6 42. Ke2 Ref7 43. Rd3 h5 44. Re3 g5 45. g4 Rf4 46. hxg5 hxg4 47. fxg4 Rf2+ 48. Kd1 e4 49. Re2 Rf1+ 50. Kd2 Rg1 51. Rh2 Rxg4 52. Rh6+ Kc7 53. Rg6 Rf2+ 54. Ke3 c5 55. Rf6 Rxf6 56. gxf6 Rg3+ 0-1

[Event "Dieren op"]
[Site "Dieren"]
[Date "2015.07.29"]
[Round "8"]
[White "Kollen, Zyon"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "B77"]
[WhiteElo "2220"]
[BlackElo "2119"]
[PlyCount "61"]
[EventDate "2015.07.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 0-0 8. Bb3 d6 9. f3 Na5 10. Qd2 a6 11. 0-0-0 Qc7 12. Bh6 Nc4 13. Bxc4 Qxc4 14. h4 b5 15. h5 b4 16. Bxg7 bxc3 17. Qh6 cxb2+ 18. Kb1 Be6 19. Nxe6 Qxe6 20. hxg6 fxg6 21. Bxf8 Rxf8 22. Rd3 Qf7 23. Ra3 Nh5 24. Rxa6 Nf4 25. Ra7 Rc8 26. Qh4 Ne2 27. c4 Nc3+ 28. Kxb2 Qg7 29. e5 Na4+ 30. Kc2 Qf7 31. Rxa4 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2015.07.28"]
[Round "7"]
[White "Boersma, Jan"]
[Black "Mueer, Sebastian"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "2119"]
[BlackElo "2210"]
[PlyCount "121"]
[EventDate "2015.07.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. Bc4 Nc6 4. d3 Bc5 5. Nf3 d6 6. h3 Be6 7. Bb3 Nd4 8. Nxd4 Bxd4 9. 0-0 c6 10. Ne2 Bb6 11. Ng3 Qd7 12. Qf3 h6 13. Be3 0-0-0 14. Bxb6 axb6 15. Qe3 c5 16. f4 exf4 17. Qxf4 d5 18. e5 Ne8 19. c3 g6 20. Ba4 Qe7 21. d4 Nc7 22. a3 h5 23. Qf6 Qxf6 24. Rxf6 h4 25. Nf1 Rh5 26. Ne3 Rg5 27. Rf3 b5 28. Bc2 b6 29. b4 Kb7 30. Bd1 Kc6 31. Ra2 Ne8 32. a4 c4 33. axb5+ Kb7 34. Raf2 Nc7 35. Rxf7 Bxf7 36. Rxf7 Kb8 37. Bf3 Rg3 38. Rf6 Kb7 39. e6 Re8 40. Rf7 Kc8 41. Rxc7+ Kxc7 42. Nxd5+ Kd6 43. Nxb6 Kxe6 44. Nxc4 Rb8 45. b6 Kf5 46. b7 Kf4 47. Kf2 Rxf3+ 48. gxf3 Rxb7 49. Ne5 g5 50. Nd3+ Kf5 51. c4 Ra7 52. b5 Ke6 53. d5+ Kd6 54. Ke3 Ra1 55. Kd4 Rh1 56. c5+ Ke7 57. b6 Kd8 58. d6 Kc8 59. c6 g4 60. b7+ Kb8 61. d7 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2015.07.27"]
[Round "6"]
[White "Boersma, Jan"]
[Black "Kolbus, Dietmar"]
[Result "0-1"]
[ECO "B15"]
[WhiteElo "2119"]
[BlackElo "2309"]
[PlyCount "104"]
[EventDate "2015.07.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. Nc3 d5 2. e4 c6 3. d4 g6 4. Nf3 Bg7 5. h3 Nh6 6. Bd3 f6 7. 0-0 Nf7 8. Re1 0-0 9. Bf4 e5 10. dxe5 fxe5 11. Bg3 d4 12. Nb1 Be6 13. Nbd2 c5 14. a4 Nc6 15. Nc4 b6 16. b3 Qe7 17. Qe2 Rac8 18. Na3 Nd6 19. Bb5 Bd7 20. Nc4 Nxc4 21. Bxc4+ Kh8 22. Bb5 Rce8 23. Qd2 Nb8 24. Bh4 Bf6 25. Bxd7 Nxd7 26. Bg3 Nb8 27. Qd3 Nc6 28. Nd2 Nb4 29. Qc4 a6 30. Nf3 Qe6 31. Qe2 d3 32. cxd3 Qxb3 33. Red1 a5 34. Qd2 Qe6 35. Qh6 Kg8 36. Qc1 Rf7 37. Qc3 Rd7 38. h4 Red8 39. Nxe5 Rxd3 40. Rxd3 Rxd3 41. Qc1 Bxe5 42. Bxe5 Qxe5 43. Qc4+ Kg7 44. Rb1 Rd4 45. Qc1 Rxe4 46. g3 c4 47. Qd1 c3 48. Qd7+ Qe7 49. Qc8 c2 50. Rf1 Qc5 51. Qd7+ Re7 52. Qd2 Na2 0-1

[Event "Dieren op"]
[Site "Dieren"]
[Date "2015.07.25"]
[Round "5"]
[White "Foisor, Sabina Francesca"]
[Black "Boersma, Jan"]
[Result "0-1"]
[ECO "E91"]
[WhiteElo "2202"]
[BlackElo "2119"]
[PlyCount "62"]
[EventDate "2015.07.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 0-0 5. Nf3 d6 6. Be2 c5 7. d5 Na6 8. h3 Re8 9. 0-0 e6 10. Bf4 Nh5 11. Bg5 f6 12. Bd2 e5 13. Nh2 Nf4 14. Bg4 f5 15. Bf3 Nb4 16. Kh1 Bd7 17. Be3 a6 18. a3 Nbd3 19. Qd2 b5 20. g3 bxc4 21. gxf4 Rb8 22. Rab1 Qh4 23. fxe5 Bxe5 24. Bg2 f4 25. Bxc5 dxc5 26. Nf3 Qh5 27. Ng1 Rb3 28. Nce2 Reb8 29. Qa5 Qh4 30. f3 Nf2+ 31. Kh2 Qg3+ 0-1

[Event "Dieren op"]
[Site "Dieren"]
[Date "2015.07.22"]
[Round "2"]
[White "Zwirs, Nico"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "B25"]
[WhiteElo "2346"]
[BlackElo "2119"]
[PlyCount "49"]
[EventDate "2015.07.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. g3 Nc6 4. Bg2 Nf6 5. Nc3 d6 6. 0-0 Bg7 7. Re1 0-0 8. d3 Rb8 9. a4 a6 10. e5 dxe5 11. Nxe5 Nxe5 12. Rxe5 Bg4 13. Qe1 Nd7 14. Rxe7 Ne5 15. Rxe5 Bxe5 16. h3 Re8 17. hxg4 Bxg3 18. Ne4 Be5 19. Qe3 c4 20. Qf3 cxd3 21. Bg5 Qb6 22. cxd3 Qxb2 23. Nf6+ Kh8 24. Re1 Qc3 25. Rc1 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2015.07.21"]
[Round "1"]
[White "Boersma, Jan"]
[Black "Harff, Marcel"]
[Result "1/2-1/2"]
[ECO "C15"]
[WhiteElo "2119"]
[BlackElo "2313"]
[PlyCount "57"]
[EventDate "2015.07.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Nge2 dxe4 5. a3 Be7 6. Nxe4 Nf6 7. Qd3 Nbd7 8. Bf4 Nxe4 9. Qxe4 Nf6 10. Qf3 Nd5 11. Be5 f6 12. Bg3 c5 13. 0-0-0 c4 14. Nf4 Nxf4 15. Bxf4 Qd5 16. Be2 Qxf3 17. Bxf3 g5 18. Bh5+ Kd7 19. Be3 f5 20. g3 Kc7 21. h4 g4 22. Rhe1 a5 23. Bf4+ Bd6 24. d5 Bxf4+ 25. gxf4 Ra6 26. Bf7 exd5 27. Bxd5 c3 28. bxc3 Rh6 29. Re7+ 1/2-1/2

[Event "Groningen op 52nd"]
[Site "Groningen"]
[Date "2014.12.30"]
[Round "9"]
[White "Minko, Vladimir"]
[Black "Boersma, Jan"]
[Result "1-0"]
[ECO "E65"]
[WhiteElo "2215"]
[BlackElo "2119"]
[PlyCount "81"]
[EventDate "2014.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. g3 c5 4. Nf3 Bg7 5. Bg2 0-0 6. 0-0 cxd4 7. Nxd4 Nc6 8. Nc3 d6 9. Nxc6 bxc6 10. Bxc6 Bh3 11. Bg2 Qd7 12. Qd3 Rfc8 13. Bxa8 Bxf1 14. Kxf1 Rxa8 15. f3 Rc8 16. Be3 Qh3+ 17. Kg1 Nd7 18. b3 h5 19. Rc1 h4 20. Bf2 hxg3 21. hxg3 Be5 22. f4 Bxc3 23. Qxc3 Nf6 24. Qf3 Ng4 25. Qg2 Qh5 26. Rf1 a6 27. Qh1 Qa5 28. Qb7 Re8 29. Bd4 Qf5 30. Kg2 Qc2 31. Qf3 Qd2 32. Qd3 Qa5 33. f5 g5 34. Qe4 Ne5 35. Bxe5 dxe5 36. Qg4 Qb6 37. Qxg5+ Kf8 38. Rh1 Qc6+ 39. Kg1 Qb6+ 40. e3 Qf6 41. Qxf6 1-0

[Event "Groningen op 52nd"]
[Site "Groningen"]
[Date "2014.12.29"]
[Round "8"]
[White "Boersma, Jan"]
[Black "Beerdsen, Thomas"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "2119"]
[BlackElo "2314"]
[PlyCount "72"]
[EventDate "2014.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 164 Extra"]
[Source "ChessBase"]
[SourceDate "2015.03.02"]
[SourceVersion "1"]
[SourceVersionDate "2015.03.02"]
[SourceQuality "1"]

1. e4 c5 2. a3 g6 3. Bc4 Bg7 4. d3 Nc6 5. Nc3 Nf6 6. Nge2 0-0 7. 0-0 a6 8. h3 b5 9. Ba2 b4 10. axb4 cxb4 11. Nd5 e6 12. Nxf6+ Qxf6 13. c3 a5 14. Be3 Ba6 15. Qd2 Qd8 16. Rad1 d5 17. exd5 exd5 18. d4 a4 19. Rfe1 b3 20. Bb1 Na5 21. Bh6 Nc4 22. Qc1 Bxh6 23. Qxh6 Qf6 24. Nf4 Qg7 25. Qxg7+ Kxg7 26. Nd3 Rfe8 27. f3 Ne3 28. Rc1 Bxd3 29. Bxd3 Nc4 30. Bxc4 Rxe1+ 31. Rxe1 dxc4 32. Ra1 a3 33. bxa3 Rxa3 34. Rb1 Ra2 35. Kh2 Rc2 36. Kg3 Rxc3 0-1

[Event "Groningen op 52nd"]
[Site "Groningen"]
[Date "2014.12.28"]
[Round "7"]
[White "Boersma, Jan"]
[Black "Salov, Sergej"]
[Result "1-0"]
[ECO "B20"]
[WhiteElo "2119"]
[BlackElo "2256"]
[PlyCount "81"]
[EventDate "2014.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 164 Extra"]
[Source "ChessBase"]
[SourceDate "2015.03.02"]
[SourceVersion "1"]
[SourceVersionDate "2015.03.02"]
[SourceQuality "1"]

1. e4 c5 2. a3 e6 3. b4 b6 4. Nf3 Bb7 5. bxc5 bxc5 6. Nc3 Nc6 7. Bc4 d6 8. 0-0 Nf6 9. Rb1 Rb8 10. d4 cxd4 11. Nxd4 Ne5 12. Bb5+ Ned7 13. f4 Qc7 14. Qe1 a6 15. Ba4 Rd8 16. f5 e5 17. Ne6 fxe6 18. fxe6 Bc6 19. exd7+ Rxd7 20. Bb3 d5 21. exd5 Nxd5 22. Ne4 Rf7 23. Rxf7 Qxf7 24. Qg3 Qf5 25. Qd3 Qd7 26. Bb2 Qa7+ 27. Kh1 Nf4 28. Qc4 Qb7 29. Re1 Bd5 30. Qc3 Ng6 31. Bxd5 Qxd5 32. Qc8+ Kf7 33. c4 Qd3 34. Qf5+ Ke7 35. Bxe5 Kd8 36. Bg3 Be7 37. Qa5+ Ke8 38. Qxa6 Kf7 39. Ng5+ Kf8 40. Qc8+ Bd8 41. Qe6 1-0

[Event "Groningen op 52nd"]
[Site "Groningen"]
[Date "2014.12.27"]
[Round "6"]
[White "Rubingh, Otto"]
[Black "Boersma, Jan"]
[Result "0-1"]
[ECO "E61"]
[WhiteElo "2209"]
[BlackElo "2119"]
[PlyCount "104"]
[EventDate "2014.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 164 Extra"]
[Source "ChessBase"]
[SourceDate "2015.03.02"]
[SourceVersion "1"]
[SourceVersionDate "2015.03.02"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Bg5 0-0 5. Qd2 d6 6. Rd1 c6 7. e4 a6 8. Bd3 b5 9. Nge2 Nbd7 10. 0-0 Bb7 11. a3 bxc4 12. Bxc4 c5 13. d5 Nb6 14. Ba2 a5 15. b3 Ba6 16. Bb1 a4 17. bxa4 Nc4 18. Qa2 Qa5 19. Bd3 Nb6 20. Bb5 Bxb5 21. axb5 Qxa3 22. Qc2 h6 23. Bc1 Qb4 24. Bd2 Qc4 25. Rc1 Nfd7 26. Qb1 Ne5 27. Nf4 Rfb8 28. Nce2 Qa2 29. Rc2 Qxb1 30. Rxb1 Nbc4 31. Bc1 Ra4 32. Nc3 Rb4 33. Ra1 Rb3 34. Nfe2 Nd3 35. Be3 Kh7 36. g3 Nxe3 37. fxe3 Nb4 38. Rcc1 Nd3 39. Rc2 R8xb5 40. Rd1 Nb2 41. Rf1 Rb7 42. Rxf7 Nc4 43. Rf3 Ne5 44. Rf1 Nc4 45. Rf3 Bf6 46. h3 Ra7 47. Kg2 Ra1 48. g4 g5 49. Kf2 Kg6 50. Rg3 Na3 51. Ra2 Bxc3 52. Nxc3 Rxa2+ 0-1

[Event "Groningen op 52nd"]
[Site "Groningen"]
[Date "2014.12.26"]
[Round "5"]
[White "Maatman, Nick"]
[Black "Boersma, Jan"]
[Result "1/2-1/2"]
[ECO "E70"]
[WhiteElo "2226"]
[BlackElo "2119"]
[PlyCount "111"]
[EventDate "2014.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 164 Extra"]
[Source "ChessBase"]
[SourceDate "2015.03.02"]
[SourceVersion "1"]
[SourceVersionDate "2015.03.02"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 0-0 5. Nge2 d6 6. Ng3 Nc6 7. d5 Nb4 8. Be2 a5 9. 0-0 c6 10. Be3 h5 11. h3 cxd5 12. cxd5 Bd7 13. f4 Qb8 14. Bd4 b5 15. Bf3 Ne8 16. Bxg7 Nxg7 17. Qd2 f5 18. Rae1 Qa7+ 19. Kh2 h4 20. Nge2 Rac8 21. Nd4 Rc4 22. Ndxb5 Bxb5 23. Nxb5 Qc5 24. Nc3 Rd4 25. Qf2 Nd3 26. Qxh4 Nxe1 27. Rxe1 Rf7 28. Qh6 Rd3 29. Re2 Qc4 30. Qxg6 a4 31. a3 Rf6 32. Qg5 Kf8 33. e5 dxe5 34. fxe5 Rf7 35. d6 Qc5 36. Qh4 exd6 37. Qh8+ Ke7 38. exd6+ Kd7 39. Qa8 Qxd6+ 40. Kh1 Ne6 41. Qxa4+ Kd8 42. Qa8+ Kd7 43. Qa4+ Kd8 44. Qa8+ Kd7 45. Re1 Nc7 46. Qa4+ Kd8 47. Nb5 Qg3 48. Rf1 Rxf3 49. Rxf3 Qe1+ 50. Kh2 Qe5+ 51. Qf4 Qxb5 52. Qg5+ Kd7 53. b4 Ne6 54. Qg6 Qe5+ 55. Qg3 f4 56. Qf2 1/2-1/2

[Event "Groningen op 52nd"]
[Site "Groningen"]
[Date "2014.12.23"]
[Round "3"]
[White "Boersma, Jan"]
[Black "Von Meijenfeldt, Bart"]
[Result "0-1"]
[ECO "B20"]
[WhiteElo "2119"]
[BlackElo "2326"]
[PlyCount "122"]
[EventDate "2014.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 164 Extra"]
[Source "ChessBase"]
[SourceDate "2015.03.02"]
[SourceVersion "1"]
[SourceVersionDate "2015.03.02"]
[SourceQuality "1"]

1. e4 c5 2. a3 g6 3. Bc4 Bg7 4. Nc3 Nc6 5. d3 e6 6. Nge2 Nge7 7. 0-0 0-0 8. Ba2 a6 9. Be3 Nd4 10. Rb1 d5 11. Nf4 dxe4 12. dxe4 Qc7 13. f3 Rd8 14. Qc1 b5 15. Rf2 Bb7 16. Nce2 e5 17. Nh3 c4 18. Ng3 Bc8 19. Ng5 h6 20. Nh3 Kh7 21. Qf1 Nec6 22. Re1 Bxh3 23. gxh3 Ne6 24. b3 c3 25. b4 Nf4 26. Ne2 Bf6 27. Bc5 Bh4 28. Nxc3 Nd4 29. Nd5 Bxf2+ 30. Kxf2 Nxd5 31. exd5 Nxc2 32. Rc1 Nxa3 33. Kg1 a5 34. d6 Rxd6 35. bxa5 Nc4 36. Bxd6 Qa7+ 37. Qf2 Nxd6 38. Qxa7 Rxa7 39. Rc6 Rxa5 40. Bd5 Nf5 41. Bxf7 Nd4 42. Bxg6+ Kg7 43. Rb6 b4 44. Bd3 Ra2 45. Rxb4 Nxf3+ 46. Kf1 Nxh2+ 47. Ke1 Nf3+ 48. Kf1 Kf6 49. Be4 Nd2+ 50. Ke1 Nxe4 51. Rxe4 Kf5 52. Rh4 e4 53. Rxh6 Kf4 54. Re6 Kf3 55. h4 Rh2 56. Rh6 Rh1+ 57. Kd2 e3+ 58. Kd3 Rd1+ 59. Kc2 e2 60. Rf6+ Kg4 61. Rg6+ Kxh4 0-1

[Event "Groningen op 52nd"]
[Site "Groningen"]
[Date "2014.12.22"]
[Round "2"]
[White "Simonian, Tigran"]
[Black "Boersma, Jan"]
[Result "1/2-1/2"]
[ECO "E71"]
[WhiteElo "2406"]
[BlackElo "2119"]
[PlyCount "132"]
[EventDate "2014.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 164 Extra"]
[Source "ChessBase"]
[SourceDate "2015.03.02"]
[SourceVersion "1"]
[SourceVersionDate "2015.03.02"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 0-0 5. h3 d6 6. Bg5 Qe8 7. Bd3 Nc6 8. Nge2 a6 9. Be3 b5 10. cxb5 Nb4 11. 0-0 Nxd3 12. Qxd3 axb5 13. a3 c6 14. Rac1 Ba6 15. Qc2 Nd7 16. Rfe1 Nb6 17. Rcd1 Nc4 18. Bc1 Bb7 19. a4 bxa4 20. Nxa4 Ba6 21. b3 Na5 22. Bd2 Qd8 23. Bc3 Rb8 24. Nc1 Qc7 25. e5 Rb7 26. exd6 exd6 27. b4 Nc4 28. Nb3 Bb5 29. Na5 Rbb8 30. Nb2 Nb6 31. Rc1 Nd5 32. Nd1 Qb6 33. Ne3 Nxc3 34. Qxc3 Bxd4 35. Qd2 d5 36. Nb3 Bxe3 37. Rxe3 Bc4 38. Nc5 Qxb4 39. Qd4 Qb2 40. Rec3 Qb6 41. Re1 Rfe8 42. Re5 f6 43. Ree3 Qb1+ 44. Kh2 Qf5 45. Rf3 Qe5+ 46. Qxe5 fxe5 47. Nd7 Kg7 48. Nxb8 Rxb8 49. Ra3 Rb7 50. Ra8 d4 51. Rfa3 d3 52. Rd8 e4 53. Rd4 Bd5 54. f3 exf3 55. gxf3 Bxf3 56. Raxd3 Bd5 57. Rd2 Rb1 58. Ra4 g5 59. Rg4 h6 60. Rg1 Rb4 61. Rf2 Kg6 62. Rgf1 Kh5 63. Rf6 Rb2+ 64. R1f2 Rb1 65. Rf1 Rb2+ 66. R1f2 Rb1 1/2-1/2

[Event "Groningen op 52nd"]
[Site "Groningen"]
[Date "2014.12.21"]
[Round "1"]
[White "Boersma, Jan"]
[Black "Baghdasaryan, Vahe"]
[Result "0-1"]
[ECO "B21"]
[WhiteElo "2119"]
[BlackElo "2368"]
[PlyCount "104"]
[EventDate "2014.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 164 Extra"]
[Source "ChessBase"]
[SourceDate "2015.03.02"]
[SourceVersion "1"]
[SourceVersionDate "2015.03.02"]
[SourceQuality "1"]

1. e4 c5 2. f4 d5 3. exd5 Nf6 4. Bb5+ Bd7 5. Bxd7+ Qxd7 6. Nf3 Nxd5 7. 0-0 Nxf4 8. d4 Ng6 9. d5 Na6 10. c4 Nc7 11. Nc3 e5 12. Ng5 f6 13. Nge4 f5 14. Ng3 f4 15. Nge4 0-0-0 16. a3 Nh4 17. b4 Na6 18. b5 Nb8 19. b6 a6 20. Qh5 Nf5 21. Rb1 g6 22. Qd1 Nd4 23. a4 Qf5 24. Ba3 Nd7 25. g4 Qf7 26. Kh1 Kb8 27. Qd3 Rc8 28. a5 h6 29. Rbe1 g5 30. Qh3 Nc2 31. Bc1 Nxe1 32. Rxe1 h5 33. Nxg5 Qg8 34. Nce4 Be7 35. gxh5 Rd8 36. Ne6 Rc8 37. Bb2 Qh7 38. d6 Bd8 39. Nc7 Qxh5 40. Qxh5 Rxh5 41. Rg1 Rh3 42. Nd5 Rh7 43. Nc7 Bh4 44. Rg6 Rch8 45. Re6 Bd8 46. Bxe5 Rxh2+ 47. Kg1 Rh1+ 48. Kf2 R8h2+ 49. Kf3 Rf1+ 50. Kg4 Rh4+ 51. Kf5 Rh5+ 52. Kg4 Nxe5+ 0-1

