[Event "Leiden op-A 10th"]
[Site "Leiden"]
[Date "2016.07.23"]
[Round "8"]
[White "Koelmans, Jan Willem"]
[Black "Van Osch, Lo"]
[Result "1-0"]
[ECO "D85"]
[WhiteElo "1928"]
[PlyCount "93"]
[EventDate "2016.07.15"]
[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. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 c5 8. Be3 Qa5 9. Qd2 Nc6 10. Rb1 cxd4 11. cxd4 Qxd2+ 12. Kxd2 0-0 13. Bb5 Rd8 14. Bxc6 bxc6 15. Rhc1 Bg4 16. Rb7 Bxf3 17. gxf3 e5 18. Rxc6 exd4 19. Bg5 Rdb8 20. Rcc7 Rxb7 21. Rxb7 a6 22. Bf4 h6 23. Kd3 Rc8 24. Rb8 Rxb8 25. Bxb8 Kf8 26. Ba7 Be5 27. h3 Ke7 28. Bxd4 Bd6 29. Kc4 Ke6 30. Bc5 Bc7 31. Be3 h5 32. Kc5 Ba5 33. Bd4 Be1 34. Kb6 a5 35. Kb5 Bd2 36. a4 Bb4 37. Bb6 Be1 38. Bxa5 Bxf2 39. Bb6 Be1 40. a5 Bxa5 41. Bxa5 f5 42. Kc4 fxe4 43. fxe4 g5 44. Kd4 g4 45. hxg4 hxg4 46. Be1 Kf6 47. Bg3 1-0

[Event "Leiden op-A 10th"]
[Site "Leiden"]
[Date "2016.07.22"]
[Round "7"]
[White "De Heer, Henk JJ"]
[Black "Van Osch, Lo"]
[Result "0-1"]
[ECO "C88"]
[WhiteElo "1865"]
[PlyCount "56"]
[EventDate "2016.07.15"]
[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 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 0-0 8. d4 Nxd4 9. Nxd4 exd4 10. e5 Ne8 11. Qxd4 Bb7 12. c3 d6 13. Nd2 dxe5 14. Qxe5 Bd6 15. Qh5 Nf6 16. Qh4 Re8 17. Rxe8+ Qxe8 18. a4 Qe1+ 19. Nf1 Be4 20. Qh3 Bc5 21. Be3 Qxa1 22. Bxc5 Qb1 23. axb5 Bd3 24. g3 axb5 25. Bd4 Bxf1 26. Qxf1 Ra1 27. Qxb1 Rxb1+ 28. Kg2 Rxb2 0-1

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2014.06.24"]
[Round "7"]
[White "Van Osch, Lo"]
[Black "De Weert, Chris WJ"]
[Result "1-0"]
[ECO "B33"]
[WhiteElo "1451"]
[BlackElo "1755"]
[PlyCount "29"]
[EventDate "2014.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be7 10. Bxf6 Bxf6 11. c3 Ne7 12. Nxe7 Bxe7 13. Be2 0-0 14. Nc2 f5 15. Qd5+ 1-0

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2014.06.17"]
[Round "6"]
[White "Bakker, Joop"]
[Black "Van Osch, Lo"]
[Result "1-0"]
[ECO "D00"]
[WhiteElo "1882"]
[BlackElo "1451"]
[PlyCount "37"]
[EventDate "2014.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 4. Bf4 Bg7 5. Qd2 0-0 6. Bh6 Nc6 7. Bxg7 Kxg7 8. 0-0-0 a6 9. Ne5 Qd6 10. f4 Bf5 11. e3 Ne4 12. Nxe4 Bxe4 13. Bd3 Bxd3 14. Nxd3 h6 15. g4 Rad8 16. h4 e6 17. h5 f6 18. Qh2 g5 19. Kb1 1-0

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2014.06.10"]
[Round "5"]
[White "Van Osch, Lo"]
[Black "Binnendijk, Daan"]
[Result "1/2-1/2"]
[ECO "B38"]
[WhiteElo "1451"]
[BlackElo "1827"]
[PlyCount "112"]
[EventDate "2014.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. c4 Nf6 6. Nc3 0-0 7. Be3 d6 8. Be2 Nc6 9. f3 Be6 10. Nxe6 fxe6 11. 0-0 Rc8 12. Rc1 Qd7 13. Qd2 Rfd8 14. Rfd1 Qe8 15. Bg5 Qf7 16. Qf4 e5 17. Qh4 Nd4 18. Bf1 a6 19. Nd5 Ne6 20. Be3 Nxd5 21. cxd5 Nd4 22. Qg4 Rxc1 23. Rxc1 h5 24. Qh3 Qe8 25. Rc7 Rb8 26. Bxd4 exd4 27. Qe6+ Kf8 28. e5 Bxe5 29. Bd3 Qf7 30. Bxg6 Qxe6 31. dxe6 h4 32. Kf1 Bxh2 33. Bf7 Be5 34. Ke2 Bf6 35. Kd3 Kg7 36. Rc2 Kh6 37. Re2 Rc8 38. Re4 Rc5 39. Rg4 Rg5 40. Rxh4+ Kg7 41. g4 Rb5 42. Rh2 Ra5 43. a3 Rb5 44. f4 d5 45. g5 Rb3+ 46. Kc2 Rf3 47. gxf6+ Kxf6 48. Rd2 Rxf4 49. Kd3 Ke5 50. Rc2 Rf3+ 51. Kd2 d3 52. Rc3 Kd4 53. Bg6 Rf2+ 54. Kd1 Rf1+ 55. Kd2 Rf2+ 56. Kd1 Rf1+ 1/2-1/2

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2014.06.03"]
[Round "4"]
[White "Hoogeveen, Luuk"]
[Black "Van Osch, Lo"]
[Result "0-1"]
[ECO "A49"]
[WhiteElo "1402"]
[BlackElo "1451"]
[PlyCount "102"]
[EventDate "2014.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 g6 3. Bg2 Bg7 4. 0-0 Nf6 5. d3 0-0 6. Nbd2 Nbd7 7. e4 dxe4 8. dxe4 e5 9. Re1 Qe7 10. c3 Nc5 11. Qc2 Rd8 12. b4 Nd3 13. Re3 Nxc1 14. Rxc1 Bg4 15. Nc4 Bh6 16. Rf1 Bxe3 17. fxe3 Bxf3 18. Bxf3 Rd7 19. h4 Qe6 20. Qe2 Rad8 21. g4 b5 22. g5 Qxc4 23. gxf6 Qxe2 24. Bxe2 Rd2 25. Bxb5 Rd1 26. a4 Rxf1+ 27. Bxf1 Rd6 28. c4 Rxf6 29. c5 Rf3 30. a5 Rxe3 31. a6 Rxe4 32. b5 Rb4 33. Kf2 Kf8 34. Ke3 Rd4 35. Bg2 Ke7 36. b6 cxb6 37. cxb6 axb6 38. a7 Ra4 39. a8Q Rxa8 40. Bxa8 f5 41. Bc6 h6 42. Bd5 g5 43. hxg5 hxg5 44. Bc6 Kf6 45. Bd5 e4 46. Kd4 g4 47. Ke3 Ke5 48. Bc6 f4+ 49. Kf2 Kd4 50. Bd7 g3+ 51. Kg2 Ke3 0-1

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2014.05.27"]
[Round "3"]
[White "Van Osch, Lo"]
[Black "Wagemans, Ed"]
[Result "0-1"]
[ECO "B92"]
[WhiteElo "1451"]
[BlackElo "1866"]
[PlyCount "92"]
[EventDate "2014.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. Be2 Be7 9. 0-0 0-0 10. Bf3 b5 11. Nd5 Nxd5 12. exd5 Bf5 13. Qd2 Nd7 14. Na5 Bf6 15. Nc6 Qc7 16. c3 Nb8 17. g4 Bd7 18. g5 Bd8 19. Nxe5 Bh3 20. Rfe1 f6 21. Nc6 fxg5 22. Nxd8 Qxd8 23. Bxg5 Qd7 24. Be4 Qg4+ 25. Kh1 Rf3 26. Bxh7+ Kxh7 27. Qc2+ Rf5 28. f4 Nd7 29. Re3 Qh5 30. Rg1 Re8 31. Rgg3 Rxe3 32. Rxe3 Kg8 33. Qe4 Qd1+ 34. Re1 Qxd5 35. Kg1 Qxe4 36. Rxe4 Rd5 37. Re8+ Kf7 38. Re7+ Kg6 39. Kf2 Bf5 40. h4 Nf6 41. Ra7 Rd2+ 42. Ke3 Rxb2 43. Rxa6 Nd5+ 44. Kf3 Nxc3 45. Rxd6+ Kh7 46. Rc6 Be4+ 0-1

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2014.05.20"]
[Round "2"]
[White "Noordijk, Ed"]
[Black "Van Osch, Lo"]
[Result "0-1"]
[ECO "C44"]
[WhiteElo "1856"]
[BlackElo "1451"]
[PlyCount "94"]
[EventDate "2014.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d3 Nf6 4. Nbd2 d5 5. c3 Be7 6. Qc2 0-0 7. Be2 Be6 8. h3 Bd6 9. g4 Re8 10. Nf1 Bf8 11. Ng3 g6 12. Rg1 Bg7 13. g5 Nd7 14. h4 f6 15. gxf6 Qxf6 16. h5 Ne7 17. Bg5 Qf8 18. 0-0-0 c5 19. Rdf1 d4 20. Nh4 Bh6 21. Qd2 Bxg5 22. Qxg5 Qf4+ 23. Qxf4 exf4 24. Nh1 Ne5 25. Nf3 Nxf3 26. Bxf3 Kf7 27. hxg6+ hxg6 28. Rg5 Rac8 29. Rfg1 Rh8 30. c4 Rh3 31. Bg4 Rxd3 32. Kc2 Bxg4 33. R5xg4 Rh3 34. Rxf4+ Ke6 35. Ng3 Nc6 36. Nf1 Ne5 37. Nd2 Rch8 38. Rg5 R3h4 39. Rxh4 Rxh4 40. Rg3 Rf4 41. f3 a6 42. a4 b6 43. b3 Kf6 44. Kd1 Nc6 45. Ke2 Ne5 46. Rh3 Kg5 47. Kf2 Rh4 0-1

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2014.05.13"]
[Round "1"]
[White "Van Osch, Lo"]
[Black "Schenkelaars, Vincent"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "1451"]
[BlackElo "1777"]
[PlyCount "91"]
[EventDate "2014.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Bd3 g6 4. Ne2 c5 5. c3 cxd4 6. cxd4 Bg7 7. 0-0 0-0 8. Nd2 Nc6 9. Nf3 Bg4 10. Be3 Bxf3 11. gxf3 Rc8 12. Qb3 Qd7 13. Rfd1 a6 14. Ng3 Ne8 15. Be2 Qc7 16. Rac1 Qb8 17. Bxa6 bxa6 18. Qxb8 Rxb8 19. Rxc6 Rxb2 20. Rxa6 Nf6 21. Rd2 Rb7 22. a4 Nd7 23. a5 Rfb8 24. Ne2 Rc8 25. Ra2 Kf8 26. Kg2 Ke8 27. f4 h6 28. Kf3 Kd8 29. Ra3 e6 30. Rc3 Rxc3 31. Nxc3 Kc7 32. Na4 Nb8 33. Rb6 Nc6 34. Rxb7+ Kxb7 35. d5 Nxa5 36. Nb6 Kc7 37. h3 Bf6 38. dxe6 fxe6 39. f5 gxf5 40. exf5 Kc6 41. fxe6 d5 42. Bd4 Bd8 43. Nc8 Bc7 44. Bb6 Nc4 45. e7 Kd7 46. Bxc7 1-0

