[Event "Leiden Noteboom op 83rd"]
[Site "Leiden"]
[Date "2024.02.16"]
[Round "1"]
[White "Smeets, Jan"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "C84"]
[WhiteElo "2542"]
[BlackElo "2055"]
[PlyCount "89"]
[EventDate "2024.02.16"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 218 Extra"]
[Source "ChessBase"]
[SourceDate "2024.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.03.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. d3 d6 7. c4 0-0 8. h3 h6 9. Be3 Nh7 10. Bxc6 bxc6 11. d4 exd4 12. Nxd4 Bd7 13. Nc3 Bf6 14. Qd3 Re8 15. Rad1 Rb8 16. b3 c5 17. Nde2 Bc6 18. f3 Ng5 19. Nd5 Bxd5 20. cxd5 Qd7 21. Rc1 Qb5 22. Rc4 Nh7 23. Nc3 Qd7 24. Ra4 Ra8 25. Rc1 Bxc3 26. Rxc3 Qb5 27. Rcc4 Nf6 28. Bd2 Nd7 29. Ra5 Ne5 30. Qe2 Qb7 31. Rca4 f5 32. Rxa6 c4 33. Rxa8 Rxa8 34. Rxa8+ Qxa8 35. Bc3 cxb3 36. axb3 Qa7+ 37. Kh2 f4 38. Bxe5 dxe5 39. Qb2 g5 40. Qxe5 Qf2 41. Qa1 h5 42. Qd1 Qe3 43. b4 Kf7 44. d6 cxd6 45. Qd5+ 1-0

[Event "NED-chT Promotion Liga 1"]
[Site "Netherlands"]
[Date "2021.06.12"]
[Round "1.1"]
[White "Van der Marel, Bert"]
[Black "Keetman, Maaike"]
[Result "1-0"]
[ECO "D24"]
[WhiteElo "2077"]
[BlackElo "2169"]
[PlyCount "55"]
[EventDate "2021.06.12"]
[EventType "team-k.o."]
[EventRounds "2"]
[EventCountry "NED"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]
[WhiteTeam "Leiden Philidor"]
[BlackTeam "De Waagtoren"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. Nf3 Nf6 2. d4 d5 3. c4 e6 4. Nc3 dxc4 5. e3 a6 6. a4 b6 7. Bxc4 Bb7 8. 0-0 c5 9. Qe2 Qc7 10. Rd1 cxd4 11. exd4 Bd6 12. d5 0-0 13. dxe6 Bxf3 14. exf7+ Kh8 15. gxf3 Bxh2+ 16. Kg2 Nbd7 17. Rh1 Be5 18. Bg5 Bxc3 19. bxc3 Qe5 20. Qd2 Rad8 21. Rad1 Qc7 22. Qf4 Rc8 23. Be6 Qb7 24. Rxd7 Nxd7 25. Rxh7+ Kxh7 26. Qf5+ g6 27. Qh3+ Kg7 28. Qh6# 1-0

[Event "Leiden Noteboom op 80th"]
[Site "Leiden"]
[Date "2020.02.28"]
[Round "1"]
[White "Schoppen, Casper"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "A28"]
[WhiteElo "2489"]
[BlackElo "2066"]
[PlyCount "51"]
[EventDate "2020.02.28"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e4 Bc5 5. Nxe5 Nxe5 6. d4 Bb4 7. dxe5 Nxe4 8. Qf3 Nxc3 9. bxc3 Be7 10. Qg3 Kf8 11. Bf4 Bh4 12. Qf3 Bg5 13. Rd1 Bxf4 14. Qxf4 Qe7 15. Be2 h5 16. 0-0 Rh6 17. Rfe1 a5 18. Bf3 Raa6 19. h4 Rab6 20. Rd5 Ra6 21. Re3 Rhe6 22. Bxh5 Rh6 23. g4 Rh8 24. e6 dxe6 25. Rd8+ Qxd8 26. Qxf7# 1-0

[Event "Leiden op-A 13th"]
[Site "Leiden"]
[Date "2019.07.20"]
[Round "8"]
[White "Wiersma, Eelke"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "C41"]
[WhiteElo "2344"]
[BlackElo "2106"]
[PlyCount "51"]
[EventDate "2019.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. Nf3 e5 5. Bc4 Be7 6. a4 c6 7. 0-0 h6 8. b3 Qa5 9. Bb2 Nb6 10. Be2 Bg4 11. Qd3 Nbd7 12. Rfe1 Nh5 13. g3 Rd8 14. d5 0-0 15. Nd2 f5 16. Bxg4 fxg4 17. dxc6 bxc6 18. Qc4+ Kh8 19. Qxc6 d5 20. exd5 Bc5 21. Re2 Bd4 22. Nc4 Qb4 23. Na2 Qb8 24. Bxd4 exd4 25. Qg6 Ndf6 26. d6 1-0

[Event "Leiden op-A 13th"]
[Site "Leiden"]
[Date "2019.07.19"]
[Round "7"]
[White "Berrevoets, Jeroen"]
[Black "Van der Marel, Bert"]
[Result "0-1"]
[ECO "C41"]
[WhiteElo "1987"]
[BlackElo "2106"]
[PlyCount "92"]
[EventDate "2019.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 d6 2. Nf3 Nf6 3. Nc3 e5 4. d4 Nbd7 5. Bc4 h6 6. 0-0 Be7 7. Qe2 c6 8. a4 Qc7 9. dxe5 dxe5 10. Rd1 Nc5 11. Be3 Ne6 12. g3 g5 13. a5 Ng4 14. a6 b6 15. b4 Nxe3 16. fxe3 Bxb4 17. Nd5 cxd5 18. Bxd5 Bc3 19. Bxa8 Bxa1 20. Rxa1 0-0 21. Bd5 Qc3 22. Ra2 Nc5 23. Qd2 Qxd2 24. Nxd2 Be6 25. Kf2 Kg7 26. c4 Bh3 27. Ra3 f5 28. exf5 Bxf5 29. Ke2 e4 30. Nb3 Nd3 31. Nd4 Bg4+ 32. Kd2 Rf2+ 33. Kc3 Nc5 34. Nc6 Bc8 35. Nxa7 Bxa6 36. Kd4 Rxh2 37. Bxe4 Rd2+ 38. Ke5 Bxc4 39. Rc3 Nd7+ 40. Kf5 Rf2+ 41. Bf3 Rxf3+ 42. Ke4 Be2 43. Rc2 Nc5+ 44. Kd4 Bf1 45. Rb2 Nd7 46. e4 Rd3+ 0-1

[Event "Leiden op-A 13th"]
[Site "Leiden"]
[Date "2019.07.18"]
[Round "6"]
[White "Van der Marel, Bert"]
[Black "De Jong, Migchiel"]
[Result "0-1"]
[ECO "A05"]
[WhiteElo "2106"]
[BlackElo "2345"]
[PlyCount "100"]
[EventDate "2019.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 b5 3. Bg2 Bb7 4. 0-0 e6 5. a4 b4 6. d3 d5 7. Nbd2 Nbd7 8. a5 Rb8 9. Nb3 Bd6 10. Bd2 0-0 11. c3 bxc3 12. bxc3 c5 13. Qc2 Qc7 14. a6 Ba8 15. Rfb1 e5 16. Nh4 g6 17. c4 dxc4 18. dxc4 e4 19. Na5 Be5 20. Ra3 Rxb1+ 21. Qxb1 Qd6 22. Bh6 Rb8 23. Nb7 Ng4 24. Be3 Nxe3 25. fxe3 Nf6 26. Bxe4 Qe6 27. Bf3 Qxc4 28. Qd1 Kg7 29. Ra4 Qc3 30. Qd3 Qe1+ 31. Kg2 h5 32. Kh3 Qf1+ 33. Bg2 Qf2 34. Nf3 Ng4 35. Nxe5 Nxe5 36. Qe4 Ng4 37. Qf4 Qg1 38. Kh4 Qxg2 39. h3 Rf8 40. Qc7 Nh6 41. e4 g5+ 42. Kxg5 Qxh3 43. Kf4 h4 44. Ra3 Qf1+ 45. Rf3 Qc1+ 46. e3 h3 47. Nxc5 Qc4 48. Kg5 Kh7 49. g4 Rg8+ 50. Kh5 Bxe4 0-1

[Event "Leiden op-A 13th"]
[Site "Leiden"]
[Date "2019.07.17"]
[Round "5"]
[White "Miettinen, Teemu"]
[Black "Van der Marel, Bert"]
[Result "1/2-1/2"]
[ECO "C41"]
[WhiteElo "2021"]
[BlackElo "2106"]
[PlyCount "62"]
[EventDate "2019.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. Nf3 e5 5. Bc4 h6 6. a4 Be7 7. Ba2 c6 8. 0-0 Qc7 9. Qe2 Nf8 10. Be3 g5 11. Rae1 Ng6 12. Qc4 Rh7 13. Nd5 Nxd5 14. exd5 g4 15. Nd2 f5 16. dxc6 bxc6 17. Qg8+ Nf8 18. dxe5 d5 19. Bxd5 cxd5 20. Qxd5 Rb8 21. Nc4 Be6 22. Nd6+ Bxd6 23. exd6 Qxc2 24. Bxa7 Rxa7 25. Rxe6+ Nxe6 26. Qxe6+ Kf8 27. Qxh6+ Kg8 28. Qe6+ Rf7 29. d7 Qxa4 30. Qg6+ Rg7 31. Qe6+ Rf7 1/2-1/2

[Event "Leiden op-A 13th"]
[Site "Leiden"]
[Date "2019.07.14"]
[Round "3"]
[White "Van der Marel, Bert"]
[Black "De Zoeten, Cato"]
[Result "1-0"]
[ECO "E70"]
[WhiteElo "2106"]
[BlackElo "1684"]
[PlyCount "67"]
[EventDate "2019.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nge2 0-0 6. Ng3 e5 7. d5 a5 8. Be2 Na6 9. Be3 b6 10. 0-0 Ne8 11. f3 f5 12. exf5 gxf5 13. f4 Nc5 14. Nh5 Bh8 15. Rf3 Ng7 16. Rg3 Nd7 17. fxe5 Nxe5 18. Bg5 Qe8 19. Nf6+ Rxf6 20. Bxf6 Ba6 21. Qd2 Qf7 22. Qh6 Rf8 23. Bxe5 dxe5 24. Rf1 Bc8 25. c5 f4 26. Bc4 fxg3 27. Rxf7 Kxf7 28. d6+ Be6 29. Nd5 gxh2+ 30. Kxh2 Nf5 31. Qxh7+ Bg7 32. Qh5+ Kg8 33. Ne7+ Nxe7 34. Bxe6+ 1-0

[Event "Leiden op-A 13th"]
[Site "Leiden"]
[Date "2019.07.13"]
[Round "2"]
[White "Van der Werf, Mark"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "A28"]
[WhiteElo "2394"]
[BlackElo "2106"]
[PlyCount "111"]
[EventDate "2019.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. e3 Bb4 5. Qc2 Bxc3 6. bxc3 d6 7. e4 0-0 8. g3 h6 9. d3 Bg4 10. Nh4 Nh7 11. h3 Be6 12. Bg2 Qf6 13. Rb1 Rab8 14. Be3 b6 15. 0-0 Qd8 16. Qe2 Na5 17. Nf5 Bxf5 18. exf5 Re8 19. g4 c6 20. Qf3 Qh4 21. Qg3 Qxg3 22. fxg3 e4 23. dxe4 Nxc4 24. Bf4 Rbd8 25. Rfe1 Nf8 26. Rbd1 Ne5 27. Rd2 Rd7 28. Red1 Red8 29. g5 hxg5 30. Bxg5 f6 31. Bf4 g5 32. fxg6 Nfxg6 33. Rf2 Kg7 34. Bc1 Nc4 35. h4 d5 36. exd5 cxd5 37. h5 Nge5 38. Bh3 Rd6 39. h6+ Kh7 40. Rd4 Rg8 41. Bf5+ Kh8 42. Bf4 b5 43. Kg2 Rgd8 44. Re2 Ra6 45. g4 Ra3 46. g5 Rxc3 47. g6 Nxg6 48. Bxg6 Rg8 49. Re8 Rxe8 50. Bxe8 b4 51. Rxd5 Nb6 52. Ra5 Nc8 53. Bf7 Rc6 54. Rb5 Nd6 55. Bxd6 Rxd6 56. Bg6 1-0

[Event "Leiden Noteboom Memorial 79th"]
[Site "Leiden"]
[Date "2019.02.23"]
[Round "2"]
[White "Van der Marel, Bert"]
[Black "Van Vliet, Jeffrey"]
[Result "0-1"]
[ECO "A07"]
[WhiteElo "2140"]
[BlackElo "2379"]
[PlyCount "92"]
[EventDate "2019.02.22"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2019.05.31"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. 0-0 Bf5 5. d3 e6 6. Nbd2 Nbd7 7. b3 Bc5 8. Bb2 Qc7 9. a3 a5 10. Qe1 0-0 11. e4 dxe4 12. dxe4 Bg6 13. Nh4 Bh5 14. Nc4 Ng4 15. Qc3 f6 16. Bh3 b5 17. Ne3 Bxe3 18. fxe3 Nde5 19. Qc5 Qa7 20. Qxa7 Rxa7 21. Bxe5 Nxe5 22. Bxe6+ Kh8 23. Bh3 Rd8 24. Rf2 a4 25. b4 Nc4 26. Nf5 Bg6 27. Bg2 Rad7 28. Bf3 Ne5 29. Nd4 Re8 30. h3 Rd6 31. Bg2 Nc4 32. e5 Rxe5 33. Nxc6 Rxe3 34. Na7 Be8 35. Rf3 Ree6 36. Rd3 Ra6 37. Nc6 Raxc6 38. Bxc6 Bxc6 39. Rd8+ Re8 40. Rad1 Kg8 41. Rxe8+ Bxe8 42. Rd3 Bg6 43. Rc3 Kf7 44. Kf2 Ke6 45. Ke2 Be4 46. Kd1 Ke5 0-1

[Event "Leiden Noteboom Memorial 79th"]
[Site "Leiden"]
[Date "2019.02.22"]
[Round "1"]
[White "Schleipfenbauer, Bent"]
[Black "Van der Marel, Bert"]
[Result "0-1"]
[ECO "C29"]
[WhiteElo "1997"]
[BlackElo "2140"]
[PlyCount "68"]
[EventDate "2019.02.22"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2019.05.31"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. d3 Qh4+ 6. g3 Nxg3 7. Nf3 Qh5 8. Bg2 Nxh1 9. Nxd5 Bg4 10. d4 Na6 11. Bxh1 0-0-0 12. Nf4 Qf5 13. c3 Be7 14. Bg2 g5 15. h3 gxf4 16. hxg4 Qxg4 17. Qe2 Rhg8 18. Bf1 Qg3+ 19. Kd1 c5 20. Qe4 Nc7 21. Bxf4 Qg4 22. Bd3 Ne6 23. Be3 Qh3 24. Rc1 Rg3 25. Be2 Kb8 26. d5 Rg4 27. Qd3 c4 28. Qd2 Rg3 29. Kc2 Qf5+ 30. Kd1 Rxf3 31. d6 Bg5 32. Bxg5 Nxg5 33. Bxf3 Nxf3 34. Qe2 Nxe5 0-1

[Event "Leiden op-A 12th"]
[Site "Leiden"]
[Date "2018.07.19"]
[Round "6"]
[White "Umudova, Nargiz"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "C86"]
[WhiteElo "2212"]
[BlackElo "2111"]
[PlyCount "61"]
[EventDate "2018.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 185 Extra"]
[Source "ChessBase"]
[SourceDate "2018.07.29"]
[SourceVersion "1"]
[SourceVersionDate "2018.07.29"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 Be7 6. 0-0 b5 7. Bb3 0-0 8. d3 d6 9. c3 Be6 10. Bc2 d5 11. Nbd2 a5 12. d4 dxe4 13. Nxe4 exd4 14. Nxf6+ Bxf6 15. Qe4 d3 16. Bxd3 g6 17. Bxb5 Bd5 18. Qf4 Rb8 19. a4 Na7 20. Rd1 c6 21. Be3 Rb7 22. Bxa7 cxb5 23. Bc5 Re8 24. axb5 Rxb5 25. Ba3 Re4 26. Qxe4 Bxe4 27. Rxd8+ Bxd8 28. Nd4 Rd5 29. Re1 Bd3 30. Nc6 Bb5 31. c4 1-0

[Event "Leiden op-A 12th"]
[Site "Leiden"]
[Date "2018.07.18"]
[Round "5"]
[White "Van der Marel, Bert"]
[Black "Stork, Ornett J"]
[Result "1-0"]
[ECO "D74"]
[WhiteElo "2111"]
[BlackElo "2101"]
[PlyCount "41"]
[EventDate "2018.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 185 Extra"]
[Source "ChessBase"]
[SourceDate "2018.07.29"]
[SourceVersion "1"]
[SourceVersionDate "2018.07.29"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. g3 g6 4. Bg2 Bg7 5. 0-0 0-0 6. c4 c6 7. cxd5 Nxd5 8. Nc3 Nb6 9. h3 N8d7 10. Bf4 Nd5 11. Nxd5 cxd5 12. Rc1 Qb6 13. Qa4 Qxb2 14. Rxc8 Raxc8 15. Qxd7 e6 16. Ne5 Rcd8 17. Qa4 a6 18. e3 g5 19. Bxg5 f6 20. Nd3 Qc3 21. Nf4 1-0

[Event "Leiden op-A 12th"]
[Site "Leiden"]
[Date "2018.07.15"]
[Round "3"]
[White "Van der Marel, Bert"]
[Black "Shyam, Nikil P"]
[Result "0-1"]
[ECO "A49"]
[WhiteElo "2111"]
[BlackElo "2375"]
[PlyCount "76"]
[EventDate "2018.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 185 Extra"]
[Source "ChessBase"]
[SourceDate "2018.07.29"]
[SourceVersion "1"]
[SourceVersionDate "2018.07.29"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 b6 3. g3 Bb7 4. Bg2 g6 5. d4 Bg7 6. 0-0 c5 7. d5 b5 8. Nfd2 d6 9. Nc3 bxc4 10. Nxc4 0-0 11. h3 Nbd7 12. a4 Rb8 13. Bd2 Ba8 14. e4 Ne8 15. Nb5 Ne5 16. b3 a6 17. Nc3 e6 18. Rb1 Nc7 19. Qc2 f5 20. f4 Nf7 21. Ne3 fxe4 22. dxe6 Nxe6 23. Bxe4 Nd4 24. Qd3 Bxe4 25. Nxe4 Qc8 26. Kh2 Qc6 27. Ng4 d5 28. Nc3 Rxb3 29. Ne5 Nxe5 30. fxe5 Rxb1 31. Rxf8+ Kxf8 32. Nxb1 Bxe5 33. Bh6+ Kg8 34. Nc3 Qd6 35. Kg2 c4 36. Qb1 Nf5 37. Bd2 Bxc3 38. Bxc3 Qxg3+ 0-1

[Event "Leiden op-A 12th"]
[Site "Leiden"]
[Date "2018.07.13"]
[Round "1"]
[White "Van der Marel, Bert"]
[Black "Lobanov, Sergei"]
[Result "0-1"]
[ECO "A01"]
[WhiteElo "2111"]
[BlackElo "2521"]
[PlyCount "138"]
[EventDate "2018.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 185 Extra"]
[Source "ChessBase"]
[SourceDate "2018.07.29"]
[SourceVersion "1"]
[SourceVersionDate "2018.07.29"]
[SourceQuality "1"]

1. b3 e5 2. Bb2 Nc6 3. e3 Nf6 4. Bb5 Bd6 5. Na3 Na5 6. Nf3 a6 7. Be2 Qe7 8. Nc4 Nxc4 9. bxc4 b6 10. d3 Bb4+ 11. Kf1 d6 12. a3 Ba5 13. Nd2 b5 14. Nb3 Bb6 15. Bf3 Rb8 16. cxb5 axb5 17. Bc6+ Bd7 18. Qf3 0-0 19. Bxd7 Qxd7 20. h3 c5 21. Nd2 c4 22. dxc4 bxc4 23. Bc3 Qe6 24. g3 Nd5 25. Bb4 f5 26. Nxc4 Nxb4 27. Nxb6 Nxc2 28. Rc1 Rxb6 29. Rxc2 Rb3 30. Qc6 Rxa3 31. Kg2 f4 32. exf4 exf4 33. Rd1 fxg3 34. fxg3 Qg6 35. g4 Qh6 36. Qd5+ Kh8 37. Rd3 Rxd3 38. Qxd3 Qf4 39. Qe2 h6 40. Rd2 Qb4 41. Qd3 Qb7+ 42. Qd5 Qxd5+ 43. Rxd5 Rf6 44. h4 Kg8 45. g5 Re6 46. Kf3 Kf7 47. Kf4 h5 48. Ra5 g6 49. Rd5 Ke7 50. Ra5 Kd7 51. Ra6 Kc7 52. Ra1 d5 53. Ra5 Re4+ 54. Kf3 Kd6 55. Ra6+ Ke5 56. Rxg6 Rxh4 57. Rg8 Rf4+ 58. Ke3 d4+ 59. Kd3 Rg4 60. g6 Kf6 61. g7 h4 62. Rh8 Kxg7 63. Rh5 Kg6 64. Rh8 Kg5 65. Ke2 Kf4 66. Kf2 Ke4 67. Re8+ Kd3 68. Ra8 Rf4+ 69. Ke1 Ke3 0-1

[Event "Leiden Noteboom Memorial 78th"]
[Site "Leiden"]
[Date "2018.02.16"]
[Round "1"]
[White "Pruijssers, Roeland"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "2523"]
[BlackElo "2156"]
[PlyCount "81"]
[EventDate "2018.02.16"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. 0-0 d6 6. c3 Bb6 7. a4 a6 8. Nbd2 0-0 9. h3 Be6 10. Bxe6 fxe6 11. Nc4 Ba7 12. b4 Qd7 13. Rb1 b5 14. Na3 Ne7 15. axb5 axb5 16. Re1 Ng6 17. d4 exd4 18. cxd4 c6 19. Nc2 h6 20. Rb3 Qf7 21. Rc3 Rfc8 22. Nh2 e5 23. Rg3 Kh7 24. Ng4 Nxg4 25. hxg4 Rf8 26. Be3 Nf4 27. g5 Qe6 28. Qd2 Bb8 29. dxe5 dxe5 30. Bc5 Rf7 31. gxh6 Qxh6 32. Ne3 Bc7 33. Nf5 Qe6 34. Be3 Rd7 35. Bxf4 exf4 36. Rh3+ Kg8 37. Qe2 Be5 38. Qg4 Kf7 39. Rh7 Qg6 40. Nh6+ Kf6 41. Qxd7 1-0

[Event "Leiden op-A 10th"]
[Site "Leiden"]
[Date "2016.07.23"]
[Round "8"]
[White "Sahil, Tickoo"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "A46"]
[WhiteElo "2016"]
[BlackElo "2195"]
[PlyCount "105"]
[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 c5 2. e3 e6 3. Nf3 Nf6 4. Bd3 Qc7 5. 0-0 Nc6 6. c4 b6 7. b3 Bb7 8. Nc3 a6 9. Bb2 Ng4 10. d5 Ne7 11. h3 h5 12. d6 Qxd6 13. Be4 Qxd1 14. Rfxd1 d5 15. cxd5 Nf6 16. dxe6 Nxe4 17. Nxe4 Nd5 18. exf7+ Kxf7 19. Ne5+ Kg8 20. Nc3 Nf6 21. Nd7 Nxd7 22. Rxd7 Bc6 23. Rd2 Rh6 24. e4 Re8 25. Re1 b5 26. f3 Bd6 27. Ne2 g5 28. Red1 Bc7 29. Kf2 Rf8 30. Ng3 Rf7 31. Nf5 Re6 32. Re2 a5 33. g4 hxg4 34. hxg4 Rh7 35. Rg1 b4 36. Bc1 Bb5 37. Ree1 Rg6 38. Rh1 Rd7 39. Rd1 Rxd1 40. Rxd1 Kf8 41. Rd5 Bc6 42. Rd2 Bb5 43. Rd5 Bc6 44. Rd1 a4 45. Be3 axb3 46. Bxc5+ Ke8 47. axb3 Bd7 48. Bxb4 Be6 49. Rd3 Be5 50. Bc3 Bf4 51. Ng7+ Kf7 52. Nxe6 Rxe6 53. Bd2 1-0

[Event "Leiden op-A 10th"]
[Site "Leiden"]
[Date "2016.07.22"]
[Round "6"]
[White "Schmidt Schaeffer, Sebastian"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "A03"]
[WhiteElo "2384"]
[BlackElo "2195"]
[PlyCount "131"]
[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. f4 d5 2. e3 g6 3. Nf3 Bg7 4. Be2 Nh6 5. 0-0 0-0 6. d4 Nf5 7. Nc3 c6 8. Qe1 Nd6 9. b3 Nd7 10. Bb2 Nf6 11. Ne5 Nfe4 12. Nxe4 Nxe4 13. c4 f6 14. Nd3 Be6 15. Rc1 Qd7 16. Ba3 Rfc8 17. Qa5 b6 18. Qa6 Nd6 19. cxd5 Bxd5 20. Nb4 Be4 21. Bd3 f5 22. Rfd1 Rc7 23. Be2 Qc8 24. Qxc8+ Raxc8 25. Na6 Rd7 26. Bb4 Rcd8 27. Rd2 e6 28. Bf3 g5 29. fxg5 e5 30. dxe5 Bxe5 31. Bxe4 Nxe4 32. Rxd7 Rxd7 33. h4 c5 34. Be1 Kf7 35. Kf1 Ke6 36. b4 Bd6 37. Ke2 Kd5 38. Kf3 Rf7 39. a4 f4 40. Rd1+ Ke5 41. bxc5 bxc5 42. Rb1 fxe3+ 43. Kxe3 Re7 44. Rb5 Kf5 45. Kf3 Rf7 46. Nb8 Ke5+ 47. Ke2 Kd5 48. Rb1 Be5 49. a5 Re7 50. Kf3 Rf7+ 51. Ke2 Ng3+ 52. Kd3 Nf5 53. Bf2 c4+ 54. Ke2 c3 55. Rb5+ Ke4 56. Nc6 Bd6 57. Rb3 Kd5 58. Rxc3 Rc7 59. Nb4+ Ke4 60. Rxc7 Bxc7 61. a6 Ng3+ 62. Kd1 Nf5 63. Bxa7 Ne7 64. Bf2 Nc8 65. Ke2 Kf5 66. Kf3 1-0

[Event "Leiden op-A 10th"]
[Site "Leiden"]
[Date "2016.07.22"]
[Round "7"]
[White "Van der Marel, Bert"]
[Black "Mokal, Amruta Sunil"]
[Result "0-1"]
[ECO "A08"]
[WhiteElo "2195"]
[BlackElo "2078"]
[PlyCount "100"]
[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. b3 c5 2. Bb2 d5 3. Nf3 Nc6 4. g3 Nf6 5. Bg2 Qc7 6. d3 e5 7. Nbd2 Be7 8. e4 dxe4 9. dxe4 Be6 10. 0-0 0-0 11. Qe2 Rfd8 12. Nc4 Nd4 13. Bxd4 exd4 14. Ng5 Bg4 15. f3 Bc8 16. f4 h6 17. Nf3 b5 18. Nce5 Bb7 19. Nd2 a6 20. a4 Qb6 21. Kh1 Rac8 22. g4 Bd6 23. axb5 axb5 24. Ndc4 bxc4 25. Nxc4 Qc7 26. e5 Be7 27. exf6 Bxf6 28. Rae1 Bxg2+ 29. Kxg2 d3 30. cxd3 Qb7+ 31. Qf3 Qxb3 32. Rd1 Ra8 33. Rf2 Ra4 34. g5 Rxc4 35. gxf6 Rxf4 36. Qxf4 Qxd1 37. fxg7 Qh5 38. Qc4 Rd4 39. Qc2 Kxg7 40. h3 Rd5 41. Qb2+ Rd4 42. Rf3 Qd5 43. Kf2 Kh7 44. Qe2 Ra4 45. Kg3 h5 46. Rf2 Rd4 47. Rf3 c4 48. Kh2 Rxd3 49. Rxd3 cxd3 50. Qd2 Kg6 0-1

[Event "Leiden op-A 10th"]
[Site "Leiden"]
[Date "2016.07.19"]
[Round "5"]
[White "Van der Marel, Bert"]
[Black "Beerdsen, Thomas"]
[Result "0-1"]
[ECO "A01"]
[WhiteElo "2195"]
[BlackElo "2414"]
[PlyCount "66"]
[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. b3 e5 2. Bb2 Nc6 3. g3 d5 4. Bg2 Be6 5. d3 Qd7 6. Nf3 f6 7. Nbd2 0-0-0 8. a3 g5 9. h4 g4 10. Ng1 f5 11. e3 Nf6 12. Ne2 Bh6 13. d4 f4 14. dxe5 fxe3 15. fxe3 Nh5 16. Nf1 Qf7 17. Bd4 Bg7 18. Nf4 Bxe5 19. Bxe5 Nxe5 20. Qd4 Nc6 21. Qc5 Qf6 22. 0-0-0 Nxf4 23. exf4 Qa1+ 24. Kd2 Qb2 25. Re1 d4 26. Rxe6 d3 27. Ke3 dxc2 28. Nd2 Rxd2 29. Rxc6 Re2+ 30. Kd3 Rd8+ 31. Bd5 bxc6 32. Qxc6 Rxd5+ 33. Qxd5 Rd2+ 0-1

[Event "Leiden op-A 10th"]
[Site "Leiden"]
[Date "2016.07.18"]
[Round "4"]
[White "Van der Marel, Bert"]
[Black "Behrens, Harald"]
[Result "1-0"]
[ECO "A07"]
[WhiteElo "2195"]
[BlackElo "2248"]
[PlyCount "71"]
[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. b3 Nf6 2. Bb2 d5 3. Nf3 Bf5 4. g3 h6 5. d3 e6 6. Bg2 Be7 7. 0-0 0-0 8. Nbd2 a5 9. a4 Bh7 10. Ne5 Na6 11. e4 c6 12. Kh1 Nb4 13. f4 Bc5 14. Ng4 Nxg4 15. Qxg4 d4 16. Qd1 f5 17. Nc4 Qc7 18. Qe2 Rad8 19. Rad1 Rfe8 20. Bf3 Kh8 21. Ne5 Rf8 22. Bh5 Rf6 23. h4 Rg8 24. c3 dxc3 25. Bxc3 Rd8 26. g4 Bd4 27. Bxd4 Rxd4 28. g5 Rf8 29. Qb2 c5 30. gxh6 fxe4 31. Rc1 Qe7 32. hxg7+ Qxg7 33. Rxc5 Qg3 34. Ng6+ Bxg6 35. Qxd4+ Kg8 36. Rg5 1-0

[Event "Leiden op-A 10th"]
[Site "Leiden"]
[Date "2016.07.16"]
[Round "2"]
[White "Van der Marel, Bert"]
[Black "Bulthuis, Jelle"]
[Result "1-0"]
[ECO "D05"]
[WhiteElo "2195"]
[BlackElo "1962"]
[PlyCount "53"]
[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. b3 Nf6 2. Bb2 d5 3. e3 c5 4. Nf3 e6 5. d4 Nc6 6. Bd3 Bd6 7. 0-0 Qc7 8. c4 b6 9. Nc3 a6 10. Rc1 dxc4 11. bxc4 cxd4 12. exd4 Bf4 13. Rb1 0-0 14. Ne4 Nxe4 15. Bxe4 Bb7 16. d5 Rad8 17. g3 Bh6 18. Ba3 f5 19. Bd3 Rfe8 20. Qb3 Ne5 21. Nxe5 Qxe5 22. Qxb6 Ba8 23. Bb2 Qd6 24. Qxd6 Rxd6 25. Rfe1 Bd2 26. Re2 Ba5 27. Bxf5 1-0

[Event "Leiden op-A 10th"]
[Site "Leiden"]
[Date "2016.07.15"]
[Round "1"]
[White "Van Wely, Loek"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "A67"]
[WhiteElo "2662"]
[BlackElo "2195"]
[PlyCount "43"]
[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 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Bb5+ Nfd7 9. Bd3 0-0 10. Nf3 Nf6 11. h3 a6 12. a4 b6 13. 0-0 Re8 14. Re1 Ra7 15. Bc4 Rae7 16. e5 Nfd7 17. Ne4 dxe5 18. d6 Re6 19. Bxe6 Rxe6 20. Neg5 Re8 21. Nxf7 Kxf7 22. Qd5+ 1-0

[Event "NED-chT 1516"]
[Site "Netherlands"]
[Date "2015.12.12"]
[Round "4.10"]
[White "Van der Marel, Bert"]
[Black "Wagenaar, Harm Theo"]
[Result "1-0"]
[ECO "A01"]
[WhiteElo "2201"]
[BlackElo "1975"]
[PlyCount "57"]
[EventDate "2015.09.26"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 170 Extra"]
[Source "ChessBase"]
[SourceDate "2016.02.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.02.25"]
[SourceQuality "1"]
[WhiteTeam "SISSA"]
[BlackTeam "Utrecht"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. b3 e5 2. Bb2 Nc6 3. e3 d6 4. d3 Nf6 5. Nf3 Be7 6. Be2 0-0 7. 0-0 h6 8. Nbd2 Re8 9. a3 a5 10. c4 Bf8 11. Qc2 Bf5 12. e4 Bh7 13. Rfe1 Qd7 14. Nf1 Rec8 15. Ne3 b6 16. Bc3 Ne7 17. b4 axb4 18. axb4 c5 19. Qb2 Qc7 20. b5 Qb7 21. Rxa8 Rxa8 22. Ra1 Nd7 23. Nh4 g6 24. g3 Ra7 25. Bg4 Nf6 26. f4 Nxg4 27. Nxg4 Bg7 28. fxe5 g5 29. exd6 1-0

[Event "Hoogeveen Unive op 19th"]
[Site "Hoogeveen"]
[Date "2015.10.24"]
[Round "9"]
[White "Van der Marel, Bert"]
[Black "Van der Veen, Jan"]
[Result "1-0"]
[ECO "A05"]
[WhiteElo "2212"]
[BlackElo "2070"]
[PlyCount "125"]
[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. b3 Nf6 2. Bb2 g6 3. Nf3 Bg7 4. g3 0-0 5. Bg2 d5 6. 0-0 c5 7. c4 d4 8. b4 Re8 9. d3 e5 10. bxc5 Nbd7 11. c6 bxc6 12. Nbd2 Rb8 13. Qc2 c5 14. Rfb1 Bb7 15. Ne4 Nxe4 16. dxe4 f5 17. Nd2 Rf8 18. Bc1 Qc7 19. Rb3 Bc6 20. Rxb8 Qxb8 21. Rb1 Qd6 22. Bh3 Qf6 23. f3 Bh6 24. Nb3 Bxc1 25. Rxc1 h5 26. Rf1 Ba8 27. Qc1 Kg7 28. Qa3 Qb6 29. Rb1 Rf7 30. Qc1 Qd6 31. Qg5 Qf6 32. Qd2 fxe4 33. Bxd7 e3 34. Qa5 Rxd7 35. Nxc5 Re7 36. Qd8 Bc6 37. Rb8 Re8 38. Qc7+ Re7 39. Qa5 e4 40. f4 d3 41. Qd8 Kh7 42. Rb1 d2 43. Kg2 Kg7 44. h4 Rd7 45. Qe8 d1Q 46. Rxd1 Rxd1 47. Ne6+ Kh6 48. Qxc6 Rd2 49. Qxe4 Rxe2+ 50. Kf3 Qb2 51. Qa8 Rf2+ 52. Ke4 Qc2+ 53. Ke5 Qf5+ 54. Kd6 Qf6 55. Qe4 Rd2+ 56. Kc6 e2 57. c5 Qe7 58. Kb5 Rb2+ 59. Kc4 a5 60. Qe5 Rb4+ 61. Kc3 Kh7 62. Ng5+ Qxg5 63. hxg5 1-0

[Event "Hoogeveen Unive op 19th"]
[Site "Hoogeveen"]
[Date "2015.10.23"]
[Round "8"]
[White "Hilwerda, Jonas"]
[Black "Van der Marel, Bert"]
[Result "0-1"]
[ECO "C30"]
[WhiteElo "1954"]
[BlackElo "2212"]
[PlyCount "32"]
[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. f4 Nc6 3. Nf3 f5 4. exf5 e4 5. Ne5 Nf6 6. d3 Qe7 7. Nc3 Nxe5 8. fxe5 Qxe5 9. dxe4 d5 10. Bd3 dxe4 11. Qe2 Bxf5 12. 0-0 0-0-0 13. Bc4 Bc5+ 14. Be3 Ng4 15. g3 Bxe3+ 16. Kg2 Rd2 0-1

[Event "Hoogeveen Unive op 19th"]
[Site "Hoogeveen"]
[Date "2015.10.22"]
[Round "7"]
[White "Van der Marel, Bert"]
[Black "Halfhide, Sebastian"]
[Result "0-1"]
[ECO "A01"]
[WhiteElo "2212"]
[BlackElo "2102"]
[PlyCount "90"]
[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. b3 e5 2. Bb2 d6 3. g3 Nf6 4. Bg2 Be7 5. d3 0-0 6. Nf3 Re8 7. 0-0 Bf8 8. Nbd2 Nc6 9. e4 g6 10. h3 Bg7 11. Nc4 b5 12. Ne3 Bb7 13. Nh4 Nd4 14. f4 exf4 15. Bxd4 fxe3 16. Qf3 Re6 17. Rae1 Qe7 18. Bxe3 d5 19. exd5 Re8 20. dxe6 Bxf3 21. exf7+ Qxf7 22. Nxf3 Qd7 23. Kh2 Nh5 24. Ng5 Be5 25. Ne4 c6 26. Bg5 Qc7 27. Rf3 Bxg3+ 28. Nxg3 Rxe1 29. Bh6 Re8 30. h4 Qd6 31. Kh3 Qe6+ 32. Kh2 Qe5 33. Kh3 Qe6+ 34. Kh2 Qe5 35. Kh3 Nxg3 36. Rxg3 Qc5 37. c4 Qf5+ 38. Kh2 Re2 39. Kh1 Re1+ 40. Kh2 Re2 41. Kh1 Qf6 42. Bg5 Qf2 43. Kh2 Kg7 44. h5 h6 45. Bd8 Qf4 0-1

[Event "Hoogeveen Unive op 19th"]
[Site "Hoogeveen"]
[Date "2015.10.21"]
[Round "6"]
[White "Bluhm, Sonja Maria"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "2128"]
[BlackElo "2212"]
[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. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. c3 d6 6. Bb3 a6 7. 0-0 Ba7 8. Re1 h6 9. h3 0-0 10. Nbd2 Be6 11. Nf1 Qd7 12. Ng3 Ne7 13. d4 Ng6 14. Be3 Qc8 15. Qd2 c5 16. Rad1 Bb8 17. Bxe6 fxe6 18. dxc5 dxc5 19. Nh2 Nf4 20. Ng4 Nxg4 21. hxg4 c4 22. Bxf4 exf4 23. Ne2 Qe8 24. Qd7 Qg6 25. Nd4 Re8 26. e5 Ba7 27. Qxb7 Qxg4 28. Qf3 Qh4 29. Re4 g5 30. g3 Qh3 31. gxf4 Qxf3 32. Nxf3 g4 33. Nd4 Rac8 34. f5 exf5 35. Nxf5 h5 36. Rd7 Bc5 37. Kg2 Bf8 38. Ng3 Bg7 39. Nxh5 Bxe5 40. Ra7 Rc6 41. Rxg4+ Kf8 42. Nf4 Bc7 43. Nd5 Bb8 44. Rag7 Be5 45. Rg8+ Kf7 46. Rxe8 Kxe8 47. Re4 1-0

[Event "Hoogeveen Unive op 19th"]
[Site "Hoogeveen"]
[Date "2015.10.20"]
[Round "5"]
[White "Van der Marel, Bert"]
[Black "Hortensius, Lisa"]
[Result "1/2-1/2"]
[ECO "A05"]
[WhiteElo "2212"]
[BlackElo "2154"]
[PlyCount "88"]
[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. b3 Nf6 2. Bb2 d5 3. g3 g6 4. Bg2 Bg7 5. Nf3 0-0 6. 0-0 c5 7. c4 d4 8. b4 Nfd7 9. d3 e5 10. b5 f5 11. Nbd2 Re8 12. Nb3 Qe7 13. Ba3 a5 14. Ne1 a4 15. Nd2 Nf6 16. Nc2 e4 17. e3 exd3 18. Nxd4 Ng4 19. Qf3 Nd7 20. h3 Ngf6 21. Qd1 Ne4 22. Rc1 Qd8 23. N4f3 Nc3 24. Rxc3 Bxc3 25. Nb1 Bf6 26. Qxd3 Nb6 27. Qxd8 Rxd8 28. Bxc5 Nxc4 29. Nd4 Nd6 30. Nc3 Ne4 31. Nxe4 fxe4 32. Bxe4 Bxh3 33. Rc1 Rd7 34. Kh2 Bxd4 35. Bxd4 Be6 36. a3 Bd5 37. Bxd5+ Rxd5 38. b6 Rd7 39. g4 Kf7 40. f4 Ke6 41. Kg3 Ra5 42. g5 Kd5 43. Kf3 Rb5 44. Rc7 Ke6 1/2-1/2

[Event "Hoogeveen Unive op 19th"]
[Site "Hoogeveen"]
[Date "2015.10.19"]
[Round "4"]
[White "Shabalov, Alexander"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "A61"]
[WhiteElo "2522"]
[BlackElo "2212"]
[PlyCount "85"]
[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 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. Nd2 Bg7 8. Nc4 0-0 9. Bg5 h6 10. Bf4 Ne8 11. h4 f5 12. Qd2 Kh7 13. e3 b6 14. Nb5 Rf7 15. Nbxd6 Rd7 16. Nxe8 Qxe8 17. Nd6 Qd8 18. Nxc8 Rxd5 19. Qc2 Qxc8 20. Bc4 Rd8 21. 0-0 Nc6 22. Rad1 Qb7 23. h5 Ne5 24. hxg6+ Kxg6 25. Be6 Qe4 26. Qxe4 fxe4 27. Bd5 Rxd5 28. Rxd5 Nd3 29. b3 b5 30. Rd6+ Kh7 31. Rc6 a5 32. Bd6 c4 33. bxc4 b4 34. Rb6 Bc3 35. c5 Nb2 36. Rb8 Ra6 37. Rb7+ Kg8 38. f3 Nc4 39. fxe4 Nxd6 40. cxd6 Rxd6 41. Rf5 Ra6 42. Rc5 Ra8 43. a4 1-0

[Event "Hoogeveen Unive op 19th"]
[Site "Hoogeveen"]
[Date "2015.10.19"]
[Round "3"]
[White "Van der Marel, Bert"]
[Black "Hendriks, Richard V"]
[Result "1-0"]
[ECO "A05"]
[WhiteElo "2212"]
[BlackElo "2107"]
[PlyCount "65"]
[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. b3 e5 2. Bb2 d6 3. g3 Nf6 4. Bg2 g6 5. d3 Bg7 6. Nf3 0-0 7. 0-0 Nc6 8. Nbd2 h6 9. e4 Be6 10. h3 Qd7 11. Kh2 g5 12. Ng1 Ne7 13. Nc4 Bxc4 14. bxc4 c5 15. Ne2 Ng6 16. Rb1 Kh7 17. f4 gxf4 18. gxf4 Nh5 19. f5 Ngf4 20. Nxf4 Nxf4 21. f6 Bh8 22. Rxf4 exf4 23. e5 Rg8 24. Be4+ Rg6 25. Bc3 Rb8 26. Qh5 Qa4 27. Rg1 Rbg8 28. Rg2 d5 29. Bf5 dxc4 30. e6 Qc6 31. Rg4 Qf3 32. Rxg6 Qxh5 33. Rg7# 1-0

[Event "Hoogeveen Unive op 19th"]
[Site "Hoogeveen"]
[Date "2015.10.18"]
[Round "2"]
[White "Zepeda, Lorena"]
[Black "Van der Marel, Bert"]
[Result "0-1"]
[ECO "C55"]
[WhiteElo "2106"]
[BlackElo "2212"]
[PlyCount "116"]
[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. Nf3 Nc6 3. Bc4 Nf6 4. Qe2 Be7 5. c3 0-0 6. Bb3 d6 7. d3 Na5 8. Bc2 c5 9. Nbd2 Bd7 10. Nf1 Ne8 11. Ng3 b5 12. 0-0 Qc7 13. Be3 g6 14. Nd2 Ng7 15. Bh6 Rfe8 16. f4 exf4 17. Bxf4 Nc6 18. Qf2 Rf8 19. Nf3 Ne5 20. Rac1 Rac8 21. h3 Be6 22. Bb1 f6 23. d4 Nxf3+ 24. Qxf3 Qb6 25. Be3 Qa5 26. a3 b4 27. axb4 cxb4 28. Bd2 Qb6 29. Kh2 a5 30. cxb4 axb4 31. d5 Bd7 32. Qb3 Rxc1 33. Rxc1 Rb8 34. Bf4 Qf2 35. Be3 Ba4 36. Qd3 Qxb2 37. Rc7 Bd8 38. Ra7 Bb5 39. Qd1 Bb6 40. Bxb6 Rxb6 41. Qg1 Ra6 42. Rxa6 Bxa6 43. Qb6 h5 44. Qxa6 h4 45. Nh1 Qxb1 46. Qxd6 Qxe4 47. Qxf6 Qxd5 48. Qxg6 Qe5+ 49. Kg1 Qe3+ 50. Kh2 Qf4+ 51. Kg1 b3 52. Qd3 Qc1+ 53. Kh2 Qc7+ 54. Kg1 Qb6+ 55. Kh2 b2 56. Qc4+ Qe6 57. Qb4 Qa2 58. Qb8+ Kh7 0-1

[Event "Hoogeveen Unive op 19th"]
[Site "Hoogeveen"]
[Date "2015.10.17"]
[Round "1"]
[White "Van der Marel, Bert"]
[Black "Kouwenhoven, Derk"]
[Result "0-1"]
[ECO "A01"]
[WhiteElo "2212"]
[BlackElo "1918"]
[PlyCount "86"]
[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. b3 e5 2. Bb2 Nc6 3. e3 Nf6 4. Bb5 d6 5. d4 exd4 6. exd4 Bd7 7. Nf3 a6 8. Be2 Bf5 9. 0-0 Be7 10. d5 Nb8 11. c4 Nbd7 12. Nbd2 0-0 13. Nh4 Bg6 14. f4 Be4 15. Nhf3 Bg6 16. Nd4 h6 17. Qe1 Bh5 18. Bd3 Nc5 19. Bc2 Ng4 20. h3 Bh4 21. g3 Re8 22. hxg4 Rxe1 23. Raxe1 Bxg3 24. gxh5 Bxe1 25. Rxe1 Qh4 26. Re2 Qg3+ 27. Rg2 Qe3+ 28. Kh2 Qxf4+ 29. Kh1 f6 30. Nf5 Re8 31. Rxg7+ Kf8 32. Bc3 Re1+ 33. Rg1 Re2 34. Rg2 Re1+ 35. Rg1 Rxg1+ 36. Kxg1 Nd7 37. Kg2 Ne5 38. Nd4 Qe3 39. Nb1 Nd3 40. Ne6+ Ke7 41. Bd2 Qf2+ 42. Kh3 Ne5 43. Be4 Qe2 0-1

[Event "Leiden op-A 9th"]
[Site "Leiden"]
[Date "2015.07.19"]
[Round "3"]
[White "Van der Marel, Bert"]
[Black "Van Delft, Merijn"]
[Result "1-0"]
[ECO "A01"]
[WhiteElo "2161"]
[BlackElo "2428"]
[PlyCount "77"]
[EventDate "2015.07.17"]
[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. b3 d5 2. Bb2 c6 3. g3 Bf5 4. Bg2 e6 5. Nf3 h6 6. d3 Nf6 7. Nbd2 Be7 8. Nh4 Bh7 9. e4 a5 10. a3 0-0 11. Qe2 a4 12. 0-0 axb3 13. cxb3 Nbd7 14. Nhf3 Nc5 15. Ne5 Qb6 16. Bd4 Qa6 17. Qe3 Qb5 18. Rfc1 Ncd7 19. Nxd7 Nxd7 20. a4 Qa5 21. exd5 cxd5 22. Bh3 Bf6 23. Nf3 Qb4 24. Rc7 Rad8 25. Bxf6 Nxf6 26. d4 Ne4 27. Rac1 Rd6 28. Ne5 Ng5 29. Bf1 f6 30. Nd7 Rd8 31. Nc5 Qxd4 32. Nxb7 Be4 33. Bg2 Qb4 34. Nxd8 Rxd8 35. h4 d4 36. Qf4 e5 37. Qg4 h5 38. Qxh5 Bxg2 39. Kxg2 1-0

[Event "Leiden op-A 9th"]
[Site "Leiden"]
[Date "2015.07.18"]
[Round "2"]
[White "Van der Marel, Bert"]
[Black "Pijpers, Arthur"]
[Result "1/2-1/2"]
[ECO "A12"]
[WhiteElo "2161"]
[BlackElo "2433"]
[PlyCount "131"]
[EventDate "2015.07.17"]
[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. b3 d5 2. Bb2 Bg4 3. g3 e6 4. Bg2 Nf6 5. Nf3 Nbd7 6. 0-0 Bd6 7. d3 0-0 8. Nbd2 Qe7 9. c4 c6 10. Qc2 Bh5 11. Rae1 a5 12. e4 dxe4 13. dxe4 e5 14. Nh4 Bb4 15. Nf5 Qc5 16. h3 Rfd8 17. g4 Nf8 18. Rd1 Bg6 19. Nf3 N6d7 20. Qc1 Bxf5 21. exf5 Qe7 22. a3 Bc5 23. Rfe1 f6 24. Nd2 Bb6 25. Qc2 Bc5 26. Qc1 Bb6 27. Qc2 Nc5 28. Ne4 Nxe4 29. Bxe4 Bc5 30. Qc1 Rxd1 31. Rxd1 Rd8 32. Rxd8 Qxd8 33. Bc3 Qb6 34. Qb2 Bd4 35. b4 axb4 36. axb4 Bxc3 37. Qxc3 Qd4 38. Qxd4 exd4 39. f4 c5 40. Bxb7 Nd7 41. Bc6 Nb8 42. Bd5+ Kf8 43. bxc5 Na6 44. c6 Ke7 45. Kf2 Kd6 46. Ke2 Kc5 47. h4 Nc7 48. Kd3 Na6 49. Ke4 Nc7 50. g5 Ne8 51. Kf3 Nc7 52. Kg4 d3 53. Bf3 Ne8 54. Kh5 Kd6 55. gxf6 Nxf6+ 56. Kg5 d2 57. h5 Ne4+ 58. Kh4 h6 59. f6 Nxf6 60. Kg3 Ne4+ 61. Kg4 Nf2+ 62. Kf5 Nd3 63. Kg6 Nxf4+ 64. Kxg7 Nxh5+ 65. Bxh5 Kxc6 66. Kxh6 1/2-1/2

[Event "Leiden op-A 9th"]
[Site "Leiden"]
[Date "2015.07.17"]
[Round "1"]
[White "Hawkins, James Nick"]
[Black "Van der Marel, Bert"]
[Result "0-1"]
[ECO "C50"]
[WhiteElo "1942"]
[BlackElo "2161"]
[PlyCount "76"]
[EventDate "2015.07.17"]
[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. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. Nc3 a6 6. a3 d6 7. h3 Be6 8. Qe2 Qd7 9. Be3 0-0 10. Bxe6 fxe6 11. Bxc5 dxc5 12. 0-0 Nd4 13. Qd1 Qd6 14. Nxd4 cxd4 15. Ne2 Nd7 16. Qd2 Rf6 17. f4 Raf8 18. fxe5 Nxe5 19. Rxf6 Rxf6 20. Rf1 Rxf1+ 21. Kxf1 c5 22. Kg1 Ng6 23. Qg5 Qe7 24. Qg4 Qf6 25. Qg3 Qe5 26. Qf3 b5 27. g3 Qg5 28. Qf2 Ne5 29. Nf4 Qh6 30. Kg2 g5 31. Ne2 g4 32. Ng1 gxh3+ 33. Nxh3 Ng4 34. Qe2 Qh5 35. Ng1 Qh2+ 36. Kf3 Ne5+ 37. Kf4 Ng6+ 38. Kf3 Qxg1 0-1

[Event "NED-chT 1415"]
[Site "Netherlands"]
[Date "2014.09.27"]
[Round "1.10"]
[White "Van der Marel, Bert"]
[Black "Bohm, Hans"]
[Result "0-1"]
[ECO "A81"]
[WhiteElo "2162"]
[BlackElo "2311"]
[PlyCount "60"]
[EventDate "2014.09.27"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 162 Extra"]
[Source "ChessBase"]
[SourceDate "2014.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2014.10.17"]
[SourceQuality "1"]
[WhiteTeam "SISSA"]
[BlackTeam "En Passant"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 e6 2. g3 d5 3. Bg2 f5 4. Nh3 Nf6 5. 0-0 Bd6 6. Bf4 b6 7. Nd2 0-0 8. Bxd6 cxd6 9. c4 Nc6 10. e3 Ne7 11. Nf4 g5 12. Nd3 Bb7 13. c5 Ba6 14. Nb3 Rc8 15. cxd6 Qxd6 16. Re1 Rc7 17. Ne5 g4 18. f3 gxf3 19. Bxf3 Ng6 20. Nd3 Rfc8 21. Be2 Ne4 22. Nf2 Bxe2 23. Rxe2 Nxg3 24. hxg3 Qxg3+ 25. Kf1 Rg7 26. Rc2 Rf8 27. Nc1 Nh4 28. Ncd3 Ng2 29. Re2 Nf4 30. exf4 Qg1# 0-1

[Event "Leiden op-A 8th"]
[Site "Leiden"]
[Date "2014.07.19"]
[Round "8"]
[White "Van der Marel, Bert"]
[Black "Kerkvliet, Maximiliaan"]
[Result "0-1"]
[ECO "D53"]
[WhiteElo "2161"]
[BlackElo "2091"]
[PlyCount "84"]
[EventDate "2014.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 161 Extra"]
[Source "ChessBase"]
[SourceDate "2014.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2014.08.29"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 Be7 6. e3 Nbd7 7. Bd3 dxc4 8. Bxc4 b5 9. Bd3 Bb7 10. 0-0 a6 11. e4 b4 12. Na4 c5 13. e5 Nd5 14. Bxe7 Qxe7 15. Nxc5 Nxc5 16. dxc5 Qxc5 17. Rc1 Qe7 18. Qa4+ Kf8 19. Qa5 g6 20. Rc4 Kg7 21. Be4 Rab8 22. h4 Qd8 23. Qxd8 Rhxd8 24. Rd1 Rdc8 25. Rdc1 Rd8 26. Kh2 h6 27. R1c2 Kf8 28. Nd2 a5 29. Rc5 Rdc8 30. Rxa5 Rxc2 31. Bxc2 Ne7 32. Be4 Rd8 33. Bxb7 Rxd2 34. Ra8+ Kg7 35. a4 Rxb2 36. a5 Ra2 37. a6 b3 38. Be4 b2 39. f4 Nc6 40. Rc8 Rxa6 41. Rc7 Ra4 42. Bxc6 Rb4 0-1

[Event "Leiden op-A 8th"]
[Site "Leiden"]
[Date "2014.07.18"]
[Round "7"]
[White "Van der Marel, Bert"]
[Black "Oosterom, Erik"]
[Result "1/2-1/2"]
[ECO "A07"]
[WhiteElo "2161"]
[BlackElo "2085"]
[PlyCount "115"]
[EventDate "2014.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 161 Extra"]
[Source "ChessBase"]
[SourceDate "2014.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2014.08.29"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 c6 3. Bg2 Bg4 4. d3 Nd7 5. Nbd2 Ngf6 6. 0-0 e5 7. h3 Bh5 8. e4 dxe4 9. dxe4 Bc5 10. c3 a5 11. Qc2 Qc7 12. Nc4 Bxf3 13. Bxf3 0-0 14. Bd2 Rfe8 15. Rad1 Rad8 16. Ne3 Nf8 17. Nf5 Ne6 18. Bc1 Rxd1 19. Rxd1 Rd8 20. Rxd8+ Qxd8 21. Qd2 Qxd2 22. Bxd2 h5 23. h4 Bf8 24. Ne3 Nc5 25. Nc4 Ncxe4 26. Be3 a4 27. a3 Bc5 28. Bxc5 Nxc5 29. Nxe5 g6 30. Be2 Nfd7 31. Nc4 Kg7 32. f4 Kf6 33. Kg2 Ke6 34. Kf3 Kd5 35. Ke3 Ne4 36. Kf3 Nec5 37. Ne3+ Kd6 38. Nc2 Nb6 39. Ne3 Ke7 40. f5 Kf6 41. fxg6 fxg6 42. g4 hxg4+ 43. Nxg4+ Kf5 44. Bd1 Nc4 45. Bc2+ Ke6 46. Bxg6 Nd7 47. Kf4 Nf8 48. Bf5+ Ke7 49. h5 Nxb2 50. Ne3 Kf6 51. h6 b5 52. Ng4+ Kf7 53. Bb1 Nd1 54. Ne5+ Kf6 55. Ng4+ Kf7 56. Ba2+ Kg6 57. Bb1+ Kf7 58. Ba2+ 1/2-1/2

[Event "Leiden op-A 8th"]
[Site "Leiden"]
[Date "2014.07.17"]
[Round "6"]
[White "Stany, George Anthony"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "C41"]
[WhiteElo "2399"]
[BlackElo "2161"]
[PlyCount "72"]
[EventDate "2014.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 161 Extra"]
[Source "ChessBase"]
[SourceDate "2014.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2014.08.29"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Bc4 Be7 6. 0-0 0-0 7. a4 c6 8. Ba2 a5 9. h3 Qc7 10. Be3 b6 11. Nd2 Ba6 12. Re1 Rad8 13. f4 c5 14. dxe5 dxe5 15. f5 c4 16. Qe2 Bc5 17. Nb5 Bxe3+ 18. Qxe3 Bxb5 19. axb5 Nc5 20. Rad1 Rd4 21. Nxc4 Rxe4 22. Qg3 Rxc4 23. Bxc4 Nce4 24. Qb3 Qc5+ 25. Kh2 Nd6 26. Bf1 e4 27. Qa3 Qe5+ 28. Qg3 Qxg3+ 29. Kxg3 Nxf5+ 30. Kf4 g6 31. g4 Ne7 32. g5 Nh5+ 33. Kxe4 Nf5 34. Bc4 Rc8 35. b3 Rc5 36. Rd7 Nfg3+ 1-0

[Event "Leiden op-A 8th"]
[Site "Leiden"]
[Date "2014.07.15"]
[Round "5"]
[White "Pijpers, Arthur"]
[Black "Van der Marel, Bert"]
[Result "1/2-1/2"]
[ECO "C97"]
[WhiteElo "2371"]
[BlackElo "2161"]
[PlyCount "91"]
[EventDate "2014.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 161 Extra"]
[Source "ChessBase"]
[SourceDate "2014.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2014.08.29"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Bd7 13. Nf1 Rfc8 14. dxe5 dxe5 15. Ne3 Rd8 16. Nd5 Nxd5 17. exd5 f6 18. Be4 Rab8 19. Qd3 h6 20. Bxh6 gxh6 21. Bh7+ Kh8 22. Qg6 Rb6 23. Qf7 Rf8 24. Qxe7 Qd6 25. Qxd6 Rxd6 26. Be4 f5 27. Bc2 e4 28. Ne5 Nc4 29. Nxc4 bxc4 30. Rad1 Rd8 31. f3 exf3 32. gxf3 Rg8+ 33. Kf2 Rdg6 34. Re7 Rg2+ 35. Ke3 R8g7 36. Rxg7 Kxg7 37. Rc1 Kf6 38. Kf4 Rd2 39. b3 Rxd5 40. bxc4 Rd2 41. Rd1 Rxd1 42. Bxd1 a5 43. Be2 Be6 44. Bf1 Bf7 45. Kg3 Ke5 46. Bd3 1/2-1/2

[Event "Leiden op-A 8th"]
[Site "Leiden"]
[Date "2014.07.14"]
[Round "4"]
[White "Van der Marel, Bert"]
[Black "Kouwenhoven, Arjen"]
[Result "1-0"]
[ECO "A67"]
[WhiteElo "2161"]
[BlackElo "1995"]
[PlyCount "65"]
[EventDate "2014.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 161 Extra"]
[Source "ChessBase"]
[SourceDate "2014.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2014.08.29"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Bb5+ Nfd7 9. a4 Qh4+ 10. g3 Qe7 11. Nf3 0-0 12. 0-0 Na6 13. Re1 Nb4 14. e5 a6 15. Bf1 Rb8 16. e6 Nb6 17. a5 Na8 18. f5 fxe6 19. fxe6 b6 20. Bg5 Bf6 21. Qd2 Bb7 22. Ne4 Bxg5 23. Qxg5 Qxg5 24. Nfxg5 Bxd5 25. e7 Rfe8 26. Nxd6 Nc2 27. Nxe8 Rxe8 28. Rad1 Nxe1 29. Rxd5 Rxe7 30. Rd8+ Kg7 31. Rxa8 h6 32. axb6 Rb7 33. Ra7 1-0

[Event "Leiden op-A 8th"]
[Site "Leiden"]
[Date "2014.07.13"]
[Round "3"]
[White "Van der Marel, Bert"]
[Black "Oudshoorn, Arres"]
[Result "1-0"]
[ECO "E70"]
[WhiteElo "2161"]
[BlackElo "2038"]
[PlyCount "123"]
[EventDate "2014.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 161 Extra"]
[Source "ChessBase"]
[SourceDate "2014.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2014.08.29"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nge2 0-0 6. Ng3 e5 7. d5 a5 8. Be2 Na6 9. Bg5 h6 10. Be3 h5 11. h4 Qe8 12. f3 Nc5 13. Qd2 Bd7 14. Bh6 Nh7 15. Bxg7 Kxg7 16. 0-0-0 a4 17. Rdg1 Qe7 18. Bd1 Rfb8 19. Bc2 b5 20. cxb5 Bxb5 21. Nd1 Rb7 22. Nf1 a3 23. Nfe3 axb2+ 24. Kb1 Rba7 25. Nc3 Ba4 26. g4 Bxc2+ 27. Qxc2 Na4 28. Ncd1 hxg4 29. Rxg4 Qf6 30. Qg2 Nc5 31. Nc3 Nd3 32. h5 g5 33. h6+ Kh8 34. Qe2 Nb4 35. a4 Rb8 36. Nc4 Na6 37. Na5 Raa8 38. Nc6 Rb3 39. Kc2 Nc5 40. a5 Kg8 41. Rgg1 Kf8 42. Rb1 Qf4 43. Rxb2 Rxb2+ 44. Kxb2 f5 45. Nb5 Rc8 46. Ra1 Ke8 47. a6 Kd7 48. a7 Ra8 49. Nc3 Nf6 50. Rh1 Nh7 51. Kc2 Ke8 52. Qb5 Kf7 53. Qb8 Na6 54. Qxa8 Qxf3 55. Re1 Nc5 56. Rd1 fxe4 57. Qh8 Kg6 58. Ne7+ Kh5 59. Qxh7 e3 60. Qg6+ Kh4 61. Nf5+ Kh3 62. Nxe3 1-0

[Event "Leiden Noteboom Memorial 74th"]
[Site "Leiden"]
[Date "2014.03.01"]
[Round "4"]
[White "Van der Marel, Bert"]
[Black "Hachijan, Armen"]
[Result "1-0"]
[ECO "E70"]
[WhiteElo "2153"]
[BlackElo "2245"]
[PlyCount "93"]
[EventDate "2014.02.28"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 159 Extra"]
[Source "ChessBase"]
[SourceDate "2014.04.24"]
[SourceVersion "1"]
[SourceVersionDate "2014.04.24"]
[SourceQuality "1"]

1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. e4 Nf6 5. Nge2 0-0 6. Ng3 e5 7. d5 a5 8. Be2 Na6 9. Bg5 c6 10. Qd2 cxd5 11. cxd5 Nc5 12. 0-0 a4 13. f3 Bd7 14. Rfc1 Qa5 15. Nd1 Qa7 16. Be3 Rfc8 17. Nf2 Be8 18. Rc3 Nfd7 19. Rac1 Bf6 20. Bg5 Bg7 21. Kh1 Qa5 22. Ng4 b5 23. Bh6 b4 24. Bxg7 Kxg7 25. Qh6+ Kg8 26. Rc4 b3 27. a3 Qd8 28. R4c3 Nf6 29. Ne3 Bd7 30. Nc4 Nb7 31. f4 Bb5 32. fxe5 dxe5 33. Nxe5 Rxc3 34. Rxc3 Bxe2 35. Nc6 Qf8 36. Qh4 Qg7 37. Ne7+ Kh8 38. Nxe2 g5 39. Qh3 Nxe4 40. Qc8+ Qf8 41. Qxb7 Nxc3 42. Nxc3 Rb8 43. Qc7 f6 44. d6 Rd8 45. Ncd5 Re8 46. d7 Ra8 47. Nc8 1-0

[Event "Leiden LCT op-A 7th"]
[Site "Leiden"]
[Date "2013.07.21"]
[Round "9"]
[White "Van der Marel, Bert"]
[Black "De Coverly, Roger D"]
[Result "1-0"]
[ECO "D38"]
[WhiteElo "2176"]
[BlackElo "2036"]
[PlyCount "49"]
[EventDate "2013.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Bb4 5. Bd2 dxc4 6. e3 c5 7. dxc5 0-0 8. Bxc4 Bxc5 9. 0-0 a6 10. a4 Nc6 11. Qe2 e5 12. e4 Bg4 13. Be3 Nd4 14. Bxd4 exd4 15. Rfd1 Qe7 16. Nd5 Nxd5 17. Bxd5 Rad8 18. Qd3 Rd6 19. Rdc1 Rh6 20. h3 Bxf3 21. Qxf3 Bd6 22. g3 Be5 23. Qb3 Rxh3 24. Qxb7 Qg5 25. Qxf7+ 1-0

[Event "Leiden LCT op-A 7th"]
[Site "Leiden"]
[Date "2013.07.20"]
[Round "8"]
[White "Van der Zon, Stef"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "A31"]
[WhiteElo "1870"]
[BlackElo "2176"]
[PlyCount "53"]
[EventDate "2013.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. Nf3 g6 4. Nc3 Bg7 5. g3 cxd4 6. Nxd4 d5 7. cxd5 Nxd5 8. Ndb5 Nxc3 9. Qxd8+ Kxd8 10. Nxc3 Nc6 11. Bg2 f6 12. 0-0 Ke8 13. Nb5 Kf7 14. Bd5+ e6 15. Bg2 Rd8 16. Be3 f5 17. Rad1 Be5 18. Bxc6 Rxd1 19. Rxd1 bxc6 20. Nxa7 Ke8 21. Nxc6 Bf6 22. Bd4 Bxd4 23. Rxd4 Bb7 24. Nb4 e5 25. Rc4 Rd8 26. f3 e4 27. Rc7 1-0

[Event "Leiden LCT op-A 7th"]
[Site "Leiden"]
[Date "2013.07.19"]
[Round "7"]
[White "Van der Marel, Bert"]
[Black "Tinga, Tjerk"]
[Result "1-0"]
[ECO "C44"]
[WhiteElo "2176"]
[BlackElo "2026"]
[PlyCount "103"]
[EventDate "2013.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. 0-0 d6 6. Bg5 f6 7. Bh4 Bg4 8. h3 Bxf3 9. Qxf3 Ne5 10. Qb3 Nxc4 11. Qxc4 Qe7 12. c3 0-0-0 13. Nd2 dxc3 14. bxc3 Nh6 15. Rab1 Nf7 16. Nf3 Ne5 17. Qa4 Bb6 18. Nd4 Nd7 19. Rfe1 Qe5 20. Bg3 Nc5 21. Qc2 Qe8 22. Rb4 Ba5 23. Rb5 b6 24. f3 Ne6 25. Reb1 a6 26. Rxa5 Nxd4 27. cxd4 bxa5 28. Rc1 c6 29. d5 Kd7 30. Rb1 Ke7 31. dxc6 Rb8 32. Rd1 Rd8 33. c7 Rd7 34. Qc6 Qc8 35. Bxd6+ Kf7 36. Qd5+ Kg6 37. g4 h5 38. Qf5+ Kf7 39. e5 Re8 40. Qxh5+ Kg8 41. Rc1 fxe5 42. Qxe8+ Qxe8 43. c8Q Rd8 44. Qc4+ Kh8 45. Bc5 Qc6 46. Qe4 Rd5 47. Be3 Qb7 48. Kg2 Kg8 49. Kg3 Qd7 50. Qc4 Kh7 51. Qe4+ Kg8 52. h4 1-0

[Event "Leiden LCT op-A 7th"]
[Site "Leiden"]
[Date "2013.07.18"]
[Round "6"]
[White "Kerkvliet, Maximiliaan"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "A35"]
[WhiteElo "2042"]
[BlackElo "2176"]
[PlyCount "75"]
[EventDate "2013.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. e3 g6 4. Nf3 Bg7 5. Nc3 0-0 6. Be2 cxd4 7. Nxd4 Nc6 8. 0-0 d6 9. b3 Bd7 10. Bb2 Rc8 11. Rc1 Qa5 12. Qd2 Rfe8 13. Rfd1 Qg5 14. Nf3 Qh6 15. Nd5 Ne4 16. Qc2 f5 17. a3 g5 18. Bxg7 Qxg7 19. Nd2 e6 20. Nxe4 fxe4 21. Nc3 d5 22. cxd5 exd5 23. Rxd5 Ne5 24. Rd4 Bf5 25. Qd2 g4 26. Kh1 Qg6 27. Nd5 Nd3 28. Bxd3 exd3 29. Rxc8 Bxc8 30. Qxd3 Bf5 31. Qb5 Bd7 32. Nf6+ Qxf6 33. Qxd7 Rf8 34. Rxg4+ Kh8 35. h3 Rf7 36. Qd4 Qxd4 37. Rxd4 Rxf2 38. Rd8+ 1-0

[Event "Leiden LCT op-A 7th"]
[Site "Leiden"]
[Date "2013.07.16"]
[Round "5"]
[White "Van der Marel, Bert"]
[Black "Klop, Tjomme"]
[Result "1/2-1/2"]
[ECO "D37"]
[WhiteElo "2176"]
[BlackElo "2069"]
[PlyCount "117"]
[EventDate "2013.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bf4 c6 6. e3 0-0 7. Bd3 Nbd7 8. Qc2 dxc4 9. Bxc4 Nb6 10. Bd3 Nbd5 11. Nxd5 exd5 12. 0-0 g6 13. a3 Nh5 14. Bh6 Re8 15. b4 a6 16. Ne5 Ng7 17. e4 dxe4 18. Bc4 Ne6 19. Qxe4 Bg5 20. Bxg5 Nxg5 21. Qf4 Rf8 22. Rad1 Be6 23. Bxe6 Nxe6 24. Qe3 Qd5 25. Rd3 Rae8 26. Qh6 Re7 27. f4 f5 28. Qh4 Rg7 29. h3 Qd8 30. Qe1 Qd5 31. Qd2 Re7 32. Re1 Rd8 33. Nf3 Red7 34. Re5 Qd6 35. Qa2 Re7 36. d5 cxd5 37. Rdxd5 Qb6+ 38. Kh2 Rxd5 39. Qxd5 Kf8 40. Qc4 Qc7 41. Qxc7 Nxc7 42. Rc5 Ne6 43. Rc4 Rc7 44. Rxc7 Nxc7 45. Nd4 Ke7 46. g4 Ne6 47. Nb3 b6 48. gxf5 gxf5 49. Kg3 Kd6 50. Kf3 Kd5 51. Ke3 h6 52. Nd2 Nd4 53. Kd3 b5 54. Nf1 Nf3 55. Ng3 Nh4 56. Ne2 Ng2 57. Nc3+ Kd6 58. Ne2 Kd5 59. Nc3+ 1/2-1/2

[Event "Leiden LCT op-A 7th"]
[Site "Leiden"]
[Date "2013.07.15"]
[Round "4"]
[White "Howell, David"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "E60"]
[WhiteElo "2639"]
[BlackElo "2176"]
[PlyCount "39"]
[EventDate "2013.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. b3 Bg7 4. Bb2 0-0 5. g3 d6 6. d4 e5 7. dxe5 Ng4 8. Nc3 Nxe5 9. Nxe5 Bxe5 10. Bg2 Nc6 11. 0-0 Bg4 12. Qd2 Bg7 13. Rae1 Qf6 14. Ba1 Qd4 15. Qc2 Nb4 16. Qc1 c6 17. Rd1 Qe5 18. h3 Bd7 19. Qd2 Qa5 20. Ne4 1-0

[Event "Leiden LCT op-A 7th"]
[Site "Leiden"]
[Date "2013.07.14"]
[Round "3"]
[White "Van der Marel, Bert"]
[Black "Blankert, Willem"]
[Result "1-0"]
[ECO "A91"]
[WhiteElo "2176"]
[BlackElo "2010"]
[PlyCount "49"]
[EventDate "2013.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. d4 e6 2. c4 f5 3. g3 Nf6 4. Bg2 c6 5. Nh3 d6 6. 0-0 Be7 7. Nc3 0-0 8. b3 Na6 9. Bb2 Qe8 10. Qd2 Nc7 11. Rae1 e5 12. e4 f4 13. gxf4 Bxh3 14. Bxh3 Qh5 15. Bg2 exf4 16. f3 Nd7 17. e5 Bh4 18. exd6 Bg3 19. hxg3 fxg3 20. Bh1 Rf4 21. Ne4 Ne8 22. Nxg3 Qh4 23. Qh2 Qf6 24. Ne4 Qf5 25. Bc1 1-0

[Event "Leiden LCT op-A 7th"]
[Site "Leiden"]
[Date "2013.07.13"]
[Round "2"]
[White "Hasangatin, Ramil"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "D01"]
[WhiteElo "2489"]
[BlackElo "2176"]
[PlyCount "31"]
[EventDate "2013.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. d4 Nf6 2. Nc3 d5 3. Bg5 c6 4. e3 Bf5 5. Bxf6 exf6 6. Bd3 Bxd3 7. Qxd3 Bd6 8. e4 dxe4 9. Qxe4+ Qe7 10. Qxe7+ Bxe7 11. 0-0-0 0-0 12. Nf3 Nd7 13. d5 cxd5 14. Nxd5 Bc5 15. b4 Bd6 16. Ne3 1-0

[Event "Leiden LCT op-A 7th"]
[Site "Leiden"]
[Date "2013.07.12"]
[Round "1"]
[White "Van der Marel, Bert"]
[Black "De Bruijne, Arian"]
[Result "1-0"]
[ECO "B70"]
[WhiteElo "2176"]
[BlackElo "1941"]
[PlyCount "49"]
[EventDate "2013.07.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. Nc3 c5 2. Nf3 Nf6 3. e4 d6 4. g3 Nc6 5. Bg2 g6 6. d4 cxd4 7. Nxd4 Bg7 8. Nxc6 bxc6 9. e5 Nd5 10. Nxd5 cxd5 11. Qxd5 Rb8 12. exd6 e6 13. Qc5 Qb6 14. Be3 Qxc5 15. Bxc5 Kd7 16. 0-0 Ba6 17. Rfd1 Rxb2 18. c4 Rc8 19. Ba3 Rbb8 20. Rab1 Bxc4 21. Bb7 Rd8 22. Rdc1 Bd5 23. Bxd5 exd5 24. Rc7+ Ke8 25. d7+ 1-0

[Event "Leiden LCT op-A 6th"]
[Site "Leiden"]
[Date "2012.07.12"]
[Round "6"]
[White "Van der Auweraert, Elwin"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "C60"]
[WhiteElo "2078"]
[BlackElo "2155"]
[PlyCount "105"]
[EventDate "2012.07.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 149 Extra"]
[Source "ChessBase"]
[SourceDate "2012.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2012.08.24"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. 0-0 g6 5. c3 Bg7 6. d4 0-0 7. Bg5 f6 8. Be3 d6 9. Nbd2 h6 10. d5 Nb8 11. Ne1 f5 12. f4 exf4 13. Bxf4 g5 14. Be3 Nd7 15. Bxd7 Bxd7 16. Bd4 Ng6 17. Bxg7 Kxg7 18. Nef3 f4 19. Nc4 Qf6 20. Qd4 Rfe8 21. Rfe1 Ne5 22. Nfxe5 dxe5 23. Qc5 Rac8 24. Qxa7 b6 25. d6 Qf7 26. Nd2 cxd6 27. Qxb6 Re6 28. Qf2 g4 29. a4 Rg6 30. g3 h5 31. Kf1 Rf6 32. Ke2 d5 33. Kd1 Rb8 34. b3 dxe4 35. Rxe4 Rxb3 36. Rxe5 Rxc3 37. Qd4 Rcc6 38. Ne4 fxg3 39. hxg3 Kg8 40. Nxf6+ Qxf6 41. Qd5+ Kf8 42. Ke2 Rc2+ 43. Kd3 Rf2 44. Qc5+ Kf7 45. Qd5+ Kf8 46. Rae1 Qg6+ 47. R1e4 Rf3+ 48. Kd4 Qg7 49. Rf4+ Rxf4+ 50. gxf4 g3 51. Qa8+ Kf7 52. Qd8 Kg6 53. Qg5+ 1-0

[Event "Leiden LCT op-A 5th"]
[Site "Leiden"]
[Date "2011.07.16"]
[Round "8"]
[White "Spirin, Oleg"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "E62"]
[WhiteElo "2491"]
[BlackElo "2168"]
[PlyCount "91"]
[EventDate "2011.07.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 143 Extra"]
[Source "ChessBase"]
[SourceDate "2011.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2011.08.29"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 0-0 5. 0-0 d6 6. d4 c6 7. Nc3 Na6 8. h3 Nc7 9. d5 c5 10. a4 e6 11. e4 exd5 12. cxd5 Nd7 13. Bg5 f6 14. Bc1 Ne5 15. Ne1 f5 16. f4 Nf7 17. Nf3 fxe4 18. Nxe4 Bf5 19. Nf2 Rb8 20. g4 Bd7 21. Ne4 a6 22. Ng3 b5 23. f5 bxa4 24. fxg6 hxg6 25. Qc2 Rb3 26. Qxg6 Nh8 27. Qc2 Bb5 28. Ng5 Bd3 29. Rxf8+ Qxf8 30. Qd1 Bd4+ 31. Kh1 Qf2 32. N5e4 Bxe4 33. Nxe4 Qh4 34. Qf1 Nf7 35. Rxa4 Be3 36. Nf6+ Kh8 37. Bxe3 Rxe3 38. Re4 Rxe4 39. Nxe4 Kg7 40. Qd1 Nb5 41. Qd2 Ne5 42. Qf4 Nd3 43. Qf5 Qe7 44. Ng3 Qe3 45. Nh5+ Kg8 46. Qg6+ 1-0

[Event "Leiden LCT op-A 5th"]
[Site "Leiden"]
[Date "2011.07.15"]
[Round "7"]
[White "Van der Marel, Bert"]
[Black "Ducarmon, Renzo"]
[Result "1-0"]
[ECO "E70"]
[WhiteElo "2168"]
[BlackElo "1990"]
[PlyCount "77"]
[EventDate "2011.07.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 143 Extra"]
[Source "ChessBase"]
[SourceDate "2011.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2011.08.29"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. Nge2 0-0 6. Ng3 e5 7. d5 c6 8. Be2 cxd5 9. cxd5 Nbd7 10. 0-0 Nb6 11. Be3 Bd7 12. a4 Ne8 13. a5 Nc8 14. Qd2 Ne7 15. Nb5 Bxb5 16. Bxb5 Nc7 17. Ba4 Kh8 18. f3 f5 19. Ne2 f4 20. Bf2 Na6 21. b4 b6 22. axb6 axb6 23. Rfc1 Rb8 24. Bc6 Nc7 25. Ra7 Nxc6 26. Rxc6 Na8 27. b5 Re8 28. Qb4 Bf8 29. Qb2 g5 30. h3 Re7 31. Qa1 Reb7 32. Nc1 Kg8 33. Nd3 Be7 34. Nb4 Kf7 35. Rc2 Rxa7 36. Qxa7 Rc8 37. Rxc8 Qxc8 38. Nc6 Qe8 39. Nxe7 1-0

[Event "Leiden LCT op-A 5th"]
[Site "Leiden"]
[Date "2011.07.14"]
[Round "6"]
[White "Van Dongen, Cor"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "A25"]
[WhiteElo "2381"]
[BlackElo "2168"]
[PlyCount "61"]
[EventDate "2011.07.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 143 Extra"]
[Source "ChessBase"]
[SourceDate "2011.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2011.08.29"]
[SourceQuality "1"]

1. c4 e5 2. g3 Nc6 3. Bg2 Bc5 4. Nc3 Nf6 5. d3 a5 6. Nf3 d6 7. 0-0 h6 8. e3 0-0 9. d4 Ba7 10. h3 Bf5 11. a3 Re8 12. d5 Nb8 13. Kh2 Na6 14. Nh4 Bh7 15. e4 Nc5 16. Qc2 a4 17. Be3 Nb3 18. Rae1 Qd7 19. g4 Nd4 20. Qd1 c6 21. Nf5 Bxf5 22. exf5 cxd5 23. Nxd5 Nh7 24. Qd3 Qd8 25. Nc3 Ng5 26. f4 Nh7 27. Nxa4 Nf6 28. Nc3 Qb6 29. Nb5 d5 30. Nxa7 Qxa7 31. fxe5 1-0

[Event "Leiden LCT op-A 5th"]
[Site "Leiden"]
[Date "2011.07.09"]
[Round "2"]
[White "Polak, Tomas"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "E91"]
[WhiteElo "2540"]
[BlackElo "2168"]
[PlyCount "75"]
[EventDate "2011.07.08"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 143 Extra"]
[Source "ChessBase"]
[SourceDate "2011.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2011.08.29"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 Bg4 7. Bg5 h6 8. Be3 Bxf3 9. Bxf3 Nfd7 10. Be2 c5 11. d5 Na6 12. 0-0 Nc7 13. Qd2 Kh7 14. Kh1 b6 15. f4 Rb8 16. a4 a6 17. h3 Nf6 18. Rad1 Ng8 19. Kh2 Nf6 20. Qc2 Nd7 21. Rf3 Ne8 22. Bd3 Qc7 23. Kh1 Qd8 24. e5 dxe5 25. f5 e4 26. Bxe4 Ne5 27. fxg6+ fxg6 28. Rxf8 Bxf8 29. Bf4 Bg7 30. Re1 Nxc4 31. Bxg6+ Kh8 32. Bxb8 Qxb8 33. Rxe7 Ned6 34. Qe2 Qf8 35. Bd3 Qf4 36. Bxc4 Nxc4 37. Re8+ Kh7 38. Qd3+ 1-0

[Event "Leiden LCT op-A 4th"]
[Site "Leiden"]
[Date "2010.07.10"]
[Round "2"]
[White "Koes, Richard"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "1947"]
[BlackElo "2178"]
[PlyCount "59"]
[EventDate "2010.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 137 Extra"]
[Source "ChessBase"]
[SourceDate "2010.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2010.09.01"]
[SourceQuality "1"]

1. Nc3 d5 2. e4 d4 3. Nce2 e5 4. Ng3 Be6 5. Nf3 Nc6 6. Be2 f6 7. 0-0 Nge7 8. d3 Ng6 9. Nf5 Qd7 10. N3h4 Nf4 11. Bxf4 exf4 12. c3 g6 13. cxd4 Nxd4 14. Nxd4 Qxd4 15. Nf3 Qd7 16. d4 Bg7 17. d5 Bf7 18. Qd2 g5 19. Nd4 0-0 20. Nf5 Bg6 21. Bg4 Kh8 22. Qe2 Rfe8 23. Qf3 Qf7 24. Nxg7 Bxe4 25. Be6 Qg6 26. Nxe8 Bxf3 27. Nxc7 Bxd5 28. Bxd5 Rd8 29. Rad1 Qf5 30. Be6 1-0

[Event "Groningen-B"]
[Site "Groningen"]
[Date "2009.07.11"]
[Round "9"]
[White "Hummel, Erik Jan"]
[Black "Van der Marel, Bert"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2236"]
[BlackElo "2226"]
[PlyCount "126"]
[EventDate "2009.07.03"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 131 Extra"]
[Source "ChessBase"]
[SourceDate "2009.09.03"]
[SourceVersion "2"]
[SourceVersionDate "2009.09.16"]
[SourceQuality "1"]

1. Nc3 d5 2. e4 d4 3. Nce2 e5 4. Ng3 Be6 5. Be2 Qd7 6. h3 g6 7. Nf3 f6 8. Nh4 Nc6 9. Bg4 Nh6 10. Bxe6 Qxe6 11. d3 Bb4+ 12. Kf1 Nf7 13. Qg4 Kd7 14. a3 Bd6 15. c4 Bf8 16. Bd2 Bh6 17. Be1 Qxg4 18. hxg4 Ncd8 19. Ne2 Ne6 20. g3 a5 21. Rd1 a4 22. Nf3 Rab8 23. Bd2 Bg7 24. Bc1 b5 25. cxb5 Nc5 26. Neg1 Rxb5 27. Ke2 Nb3 28. Bd2 h6 29. Nh4 g5 30. Nf5 Bf8 31. Nf3 Nd6 32. Nxd6 Kxd6 33. Rb1 Bg7 34. Bc1 Rhb8 35. Nd2 Na5 36. Kd1 Ke6 37. f3 Bf8 38. Ra1 Nb3 39. Ra2 Na5 40. Rh2 Rc8 41. Nb1 Rb3 42. Bd2 Nb7 43. Ke2 Nc5 44. Rh1 Nxd3 45. Bc1 Nc5 46. Nd2 Re3+ 47. Kd1 Nb3 48. Rf1 Na5 49. Re1 Rxe1+ 50. Kxe1 c5 51. Ra1 c4 52. Nf1 Rb8 53. Bd2 Nb3 54. Rd1 Bc5 55. Bc1 Bb6 56. Kf2 Ba5 57. Kg1 Kd6 58. Ne3 Kc5 59. Nd5 Nxc1 60. Rxc1 Rxb2 61. Nxf6 d3 62. Nd5 Kd4 63. Kf1 c3 0-1

[Event "Groningen-B"]
[Site "Groningen"]
[Date "2009.07.10"]
[Round "8"]
[White "Van der Marel, Bert"]
[Black "Bijlsma, Nick"]
[Result "1/2-1/2"]
[ECO "D09"]
[WhiteElo "2226"]
[BlackElo "1982"]
[PlyCount "62"]
[EventDate "2009.07.03"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 131 Extra"]
[Source "ChessBase"]
[SourceDate "2009.09.03"]
[SourceVersion "2"]
[SourceVersionDate "2009.09.16"]
[SourceQuality "1"]

1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3 Nge7 6. Bg2 Ng6 7. a3 a5 8. b3 Bg4 9. Nbd2 Qd7 10. Bb2 0-0-0 11. b4 Ncxe5 12. 0-0 h5 13. bxa5 Bh3 14. Bxd4 Bxg2 15. Kxg2 Qc6 16. Kg1 Ng4 17. Qb3 h4 18. Qb5 hxg3 19. fxg3 Qe6 20. e4 Nxh2 21. Nxh2 Rxd4 22. Ndf3 Rd7 23. Qf5 Qxf5 24. exf5 Bc5+ 25. Kg2 Ne7 26. f6 gxf6 27. Ng4 Rd3 28. Nxf6 Bxa3 29. Ne5 Rd2+ 30. Rf2 Rxf2+ 31. Kxf2 Bb2 1/2-1/2

[Event "Groningen-B"]
[Site "Groningen"]
[Date "2009.07.08"]
[Round "6"]
[White "Van der Marel, Bert"]
[Black "Balje, Jan"]
[Result "0-1"]
[ECO "D44"]
[WhiteElo "2226"]
[BlackElo "2202"]
[PlyCount "68"]
[EventDate "2009.07.03"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 131 Extra"]
[Source "ChessBase"]
[SourceDate "2009.09.03"]
[SourceVersion "2"]
[SourceVersionDate "2009.09.16"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 e6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5 Nbd7 11. exf6 Bb7 12. g3 Qb6 13. Bg2 c5 14. d5 0-0-0 15. 0-0 b4 16. Na4 Qa6 17. a3 Bxd5 18. Bxd5 Ne5 19. axb4 Rxd5 20. Qe2 cxb4 21. Nc3 Ra5 22. Rxa5 Qxa5 23. Ne4 Nd3 24. Rd1 Qe5 25. Rxd3 cxd3 26. Qxd3 Qd5 27. Qc2+ Kb7 28. Be3 b3 29. Qe2 Bb4 30. Ng5 e5 31. h4 Rc8 32. Nxf7 Rc2 33. Qh5 Bd2 34. Nd8+ Ka8 0-1

[Event "Groningen-B"]
[Site "Groningen"]
[Date "2009.07.07"]
[Round "5"]
[White "Van der Marel, Bert"]
[Black "Hoeksema, Hendrik Pieter"]
[Result "0-1"]
[ECO "A57"]
[WhiteElo "2226"]
[BlackElo "2309"]
[PlyCount "72"]
[EventDate "2009.07.03"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 131 Extra"]
[Source "ChessBase"]
[SourceDate "2009.09.03"]
[SourceVersion "2"]
[SourceVersionDate "2009.09.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. a4 bxc4 5. Nc3 d6 6. e4 Ba6 7. Nf3 Nbd7 8. h3 g6 9. Bf4 Bg7 10. Nd2 Qa5 11. Qc2 Nb6 12. Be2 Nfd7 13. 0-0 Ne5 14. Bxe5 Bxe5 15. Rfb1 0-0 16. Nd1 e6 17. Ne3 exd5 18. exd5 Bd4 19. Nexc4 Bxc4 20. Nxc4 Nxc4 21. Bxc4 Rab8 22. Ra2 Rfe8 23. b3 Re1+ 24. Rxe1 Qxe1+ 25. Bf1 Re8 26. Qd3 Qb4 27. Qb5 Re1 28. Re2 Rb1 29. Qe8+ Kg7 30. Qb5 Rxb3 31. Rc2 Qa3 32. Qa6 Rb1 33. Qe2 Qxa4 34. Ra2 Qd7 35. Qa6 Qf5 36. Qxa7 Qd3 0-1

[Event "Groningen-B"]
[Site "Groningen"]
[Date "2009.07.06"]
[Round "4"]
[White "Knol, Geon"]
[Black "Van der Marel, Bert"]
[Result "1/2-1/2"]
[ECO "C51"]
[WhiteElo "2070"]
[BlackElo "2226"]
[PlyCount "22"]
[EventDate "2009.07.03"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 131 Extra"]
[Source "ChessBase"]
[SourceDate "2009.09.03"]
[SourceVersion "2"]
[SourceVersionDate "2009.09.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Be7 6. d4 Na5 7. Nxe5 Nxc4 8. Nxc4 d5 9. exd5 Qxd5 10. Ne3 Qd8 11. 0-0 Nf6 1/2-1/2

[Event "Groningen-B"]
[Site "Groningen"]
[Date "2009.07.05"]
[Round "3"]
[White "Van der Marel, Bert"]
[Black "Kroencke, Manfred"]
[Result "1/2-1/2"]
[ECO "D58"]
[WhiteElo "2226"]
[BlackElo "2121"]
[PlyCount "49"]
[EventDate "2009.07.03"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 131 Extra"]
[Source "ChessBase"]
[SourceDate "2009.09.03"]
[SourceVersion "2"]
[SourceVersionDate "2009.09.16"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. Nf3 0-0 6. e3 h6 7. Bh4 b6 8. Rc1 Bb7 9. Bxf6 Bxf6 10. cxd5 exd5 11. Bd3 c6 12. 0-0 Nd7 13. Bb1 Re8 14. Qc2 Nf8 15. a3 g6 16. Rfd1 Ne6 17. b4 Qe7 18. Qb3 Rad8 19. Ba2 Kg7 20. Qa4 Rd7 21. Qc2 Rc8 22. Qb3 Rcd8 23. Na4 Nc7 24. Nc3 Ne6 25. Na4 1/2-1/2

[Event "Groningen-B"]
[Site "Groningen"]
[Date "2009.07.04"]
[Round "2"]
[White "Mostertman, Milan"]
[Black "Van der Marel, Bert"]
[Result "1/2-1/2"]
[ECO "C47"]
[WhiteElo "2119"]
[BlackElo "2226"]
[PlyCount "39"]
[EventDate "2009.07.03"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 131 Extra"]
[Source "ChessBase"]
[SourceDate "2009.09.03"]
[SourceVersion "2"]
[SourceVersionDate "2009.09.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nxd4 Bb4 6. Nxc6 bxc6 7. Bd3 d5 8. exd5 cxd5 9. 0-0 0-0 10. Bg5 c6 11. Ne2 Bg4 12. c3 Bc5 13. Qa4 Bxe2 14. Bxe2 Qd6 15. Bf3 Rfe8 16. Rad1 Qe6 17. Bxf6 Qxf6 18. c4 Qf4 19. Qxc6 Bd6 20. g3 1/2-1/2

[Event "Groningen-B"]
[Site "Groningen"]
[Date "2009.07.03"]
[Round "1"]
[White "Van der Marel, Bert"]
[Black "Groenewold, Jan Joris"]
[Result "0-1"]
[ECO "D32"]
[WhiteElo "2226"]
[BlackElo "2117"]
[PlyCount "62"]
[EventDate "2009.07.03"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 131 Extra"]
[Source "ChessBase"]
[SourceDate "2009.09.03"]
[SourceVersion "2"]
[SourceVersionDate "2009.09.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 c5 5. dxc5 Bxc5 6. Nc3 a6 7. e3 Nc6 8. Be2 0-0 9. 0-0 d5 10. cxd5 exd5 11. Rc1 Ba7 12. a3 Ne4 13. Be1 Be6 14. Nxe4 dxe4 15. Qxd8 Rfxd8 16. Ng5 Bd5 17. Bc4 Bxc4 18. Rxc4 f5 19. Bc3 Rd6 20. Bb4 Nxb4 21. axb4 h6 22. Nh3 Rad8 23. g3 g5 24. Rfc1 Rd1+ 25. Rxd1 Rxd1+ 26. Kg2 Rd7 27. Kf1 Kf7 28. Ke1 Bb8 29. b5 a5 30. b4 a4 31. Rc8 Bd6 0-1

[Event "Groningen Atlantis-B"]
[Site "Groningen"]
[Date "2008.07.03"]
[Round "8"]
[White "Van der Marel, Bert"]
[Black "Akotchik, Victor"]
[Result "1-0"]
[ECO "D31"]
[WhiteElo "2223"]
[BlackElo "2121"]
[PlyCount "65"]
[EventDate "2008.06.27"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 a5 8. axb5 Bxc3 9. Bxc3 cxb5 10. b3 Bb7 11. bxc4 b4 12. Bb2 Nf6 13. Bd3 Nbd7 14. 0-0 Qc7 15. Re1 0-0 16. e4 e5 17. c5 Rfe8 18. Rc1 exd4 19. c6 Bxc6 20. Bb5 Nb8 21. Nxd4 Rd8 22. e5 Qb6 23. exf6 Bxb5 24. Nf5 g6 25. Qf3 Ra7 26. Ne7+ Rxe7 27. fxe7 Re8 28. Qf4 Nd7 29. Rc8 Nc5 30. Rxe8+ Bxe8 31. Qh6 Ne6 32. Rxe6 Qxe6 33. Qg7# 1-0

[Event "Groningen Atlantis-B"]
[Site "Groningen"]
[Date "2008.07.02"]
[Round "6"]
[White "Balje, Jan"]
[Black "Van der Marel, Bert"]
[Result "1/2-1/2"]
[ECO "A70"]
[WhiteElo "2197"]
[BlackElo "2223"]
[PlyCount "78"]
[EventDate "2008.06.27"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. h3 0-0 9. Bd3 a6 10. a4 Nbd7 11. 0-0 Ne8 12. Bf4 Ne5 13. Nxe5 Bxe5 14. Bxe5 dxe5 15. a5 Nd6 16. Qd2 Bd7 17. Na4 c4 18. Bc2 Bb5 19. Qc3 Qe7 20. Rae1 f6 21. Nc5 Rfc8 22. Na4 Bxa4 23. Bxa4 g5 24. Qb4 Qc7 25. Qc3 Qc5 26. h4 h6 27. hxg5 hxg5 28. Qh3 Rc7 29. Qh6 Rf8 30. Re3 Rh7 31. Qg6+ Rg7 32. Qh6 Qxa5 33. Bd1 g4 34. Rg3 Nxe4 35. Rxg4 Ng5 36. Rxc4 Nf7 37. Qh3 Ng5 38. Qh5 Rh7 39. Qg6+ Rg7 1/2-1/2

[Event "Groningen Atlantis-B"]
[Site "Groningen"]
[Date "2008.07.02"]
[Round "7"]
[White "Van der Marel, Bert"]
[Black "Hummel, Erik Jan"]
[Result "1/2-1/2"]
[ECO "A42"]
[WhiteElo "2223"]
[BlackElo "2209"]
[PlyCount "37"]
[EventDate "2008.06.27"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[SourceQuality "1"]

1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 Nc6 5. Nge2 e5 6. d5 Nce7 7. Ng3 f5 8. exf5 Nxf5 9. Nge4 Nf6 10. Bd3 0-0 11. Bg5 Qe8 12. Nxf6+ Bxf6 13. Bxf6 Rxf6 14. Ne4 Rf8 15. 0-0 Nd4 16. Qd2 Rf4 17. Rae1 Qf8 18. Re3 Bf5 19. Ng3 1/2-1/2

[Event "Groningen Atlantis-B"]
[Site "Groningen"]
[Date "2008.07.01"]
[Round "5"]
[White "Van der Marel, Bert"]
[Black "Veltman, Jelmer"]
[Result "1-0"]
[ECO "E15"]
[WhiteElo "2223"]
[BlackElo "2174"]
[PlyCount "67"]
[EventDate "2008.06.27"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb7 6. Bg2 Bb4+ 7. Bd2 c5 8. 0-0 0-0 9. Nc3 cxd4 10. Nxd4 Bxg2 11. Kxg2 Nc6 12. Nc2 Be7 13. Bf4 d5 14. cxd5 exd5 15. e3 h6 16. h4 Qd7 17. Qf3 Qf5 18. Nd4 Nxd4 19. exd4 Bb4 20. Rac1 Rac8 21. g4 Nxg4 22. Nxd5 Ba3 23. b4 Qd7 24. Rce1 Bxb4 25. Nxb4 Rc4 26. Nd5 Rxd4 27. Rd1 Rxd1 28. Rxd1 Qe6 29. Rd2 h5 30. Re2 Qd7 31. Bg3 Rd8 32. Ne7+ Kf8 33. Nf5 Qd1 34. Bd6+ 1-0

[Event "Groningen Atlantis-B"]
[Site "Groningen"]
[Date "2008.06.30"]
[Round "4"]
[White "Vogel, Jaap"]
[Black "Van der Marel, Bert"]
[Result "1/2-1/2"]
[ECO "E11"]
[WhiteElo "2254"]
[BlackElo "2223"]
[PlyCount "69"]
[EventDate "2008.06.27"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Nc6 5. d4 Bb4+ 6. Bd2 a5 7. Bxb4 axb4 8. Nbd2 0-0 9. 0-0 Qe7 10. Qc2 Rd8 11. Rfd1 Bd7 12. e4 b3 13. axb3 Nb4 14. Qc3 Na2 15. Qe3 dxe4 16. Ne5 Nb4 17. Rxa8 Rxa8 18. Nxe4 Bc8 19. Nxf6+ Qxf6 20. Qc3 Qe7 21. Re1 f6 22. Nf3 Na2 23. Qe3 Nb4 24. Qd2 c5 25. Bh3 Ra6 26. dxc5 Qxc5 27. Qd8+ Qf8 28. Rd1 Rc6 29. Bg2 Kf7 30. Qxf8+ Kxf8 31. Rd8+ Ke7 32. Rg8 Kf7 33. Rh8 Bd7 34. Rb8 b6 35. h4 1/2-1/2

[Event "Groningen Atlantis-B"]
[Site "Groningen"]
[Date "2008.06.29"]
[Round "3"]
[White "Van der Marel, Bert"]
[Black "Hoeksema, Hendrik Pieter"]
[Result "1/2-1/2"]
[ECO "E17"]
[WhiteElo "2223"]
[BlackElo "2347"]
[PlyCount "44"]
[EventDate "2008.06.27"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. 0-0 0-0 7. d5 exd5 8. Nh4 c6 9. cxd5 Nxd5 10. Nf5 Nc7 11. e4 d5 12. Nc3 Nba6 13. Qg4 g6 14. Bh6 Re8 15. exd5 cxd5 16. Rad1 Bf6 17. Ne3 Qc8 18. Ncxd5 Nxd5 19. Nxd5 Bxd5 20. Qxc8 Raxc8 21. Bxd5 Nb4 22. Bb3 Red8 1/2-1/2

[Event "Groningen Atlantis-B"]
[Site "Groningen"]
[Date "2008.06.28"]
[Round "2"]
[White "Schoorl, Rob"]
[Black "Van der Marel, Bert"]
[Result "1/2-1/2"]
[ECO "C92"]
[WhiteElo "2257"]
[BlackElo "2223"]
[PlyCount "46"]
[EventDate "2008.06.27"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Bb7 10. d4 Re8 11. Nbd2 Bf8 12. a4 h6 13. Bc2 exd4 14. cxd4 Nb4 15. Bb1 c5 16. d5 g6 17. Nh2 Bg7 18. Ndf3 Qb6 19. a5 Qd8 20. Bd2 Qe7 21. Bc3 Nd7 22. Qd2 Ne5 23. Nxe5 dxe5 1/2-1/2

[Event "Groningen Atlantis-B"]
[Site "Groningen"]
[Date "2008.06.27"]
[Round "1"]
[White "Van der Marel, Bert"]
[Black "Houtman, Joop"]
[Result "1/2-1/2"]
[ECO "D60"]
[WhiteElo "2223"]
[BlackElo "2233"]
[PlyCount "83"]
[EventDate "2008.06.27"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 Nbd7 6. e3 0-0 7. Bd3 dxc4 8. Bxc4 c5 9. 0-0 a6 10. a4 b6 11. d5 Nxd5 12. Bxd5 exd5 13. Qxd5 Ra7 14. Bxe7 Qxe7 15. Rfd1 Nf6 16. Qd6 Qxd6 17. Rxd6 Rb7 18. Ne5 Be6 19. f3 Re8 20. e4 Bb3 21. Nd3 Re6 22. Rxe6 Bxe6 23. Kf2 Kf8 24. Ke3 Nd7 25. Nf4 Ke7 26. Nfd5+ Bxd5 27. Nxd5+ Ke6 28. b3 f5 29. Nf4+ Kf6 30. exf5 Kxf5 31. g4+ Kf6 32. Rd1 Kf7 33. h4 b5 34. axb5 axb5 35. Rc1 Ra7 36. Rd1 c4 37. bxc4 Ra3+ 38. Ke2 Ra2+ 39. Kd3 bxc4+ 40. Kxc4 Ne5+ 41. Kd5 Nxf3 42. h5 1/2-1/2

[Event "Groningen op"]
[Site "Groningen"]
[Date "2007.04.14"]
[Round "2"]
[White "Bodewes, Peter"]
[Black "Van der Marel, Bert"]
[Result "0-1"]
[ECO "C30"]
[BlackElo "2236"]
[PlyCount "50"]
[EventDate "2007.04.13"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 118 Extra"]
[Source "ChessBase"]
[SourceDate "2007.07.04"]
[SourceVersion "1"]
[SourceVersionDate "2007.07.04"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Bc5 3. Bc4 Nf6 4. d3 a6 5. f4 d6 6. Nf3 Nc6 7. Rf1 h6 8. a3 0-0 9. f5 Nd4 10. Ng1 d5 11. Nxd5 Nxd5 12. Bxd5 Qh4+ 13. Kd2 c6 14. b4 cxd5 15. bxc5 dxe4 16. f6 e3+ 17. Kxe3 Bg4 18. Nf3 Bxf3 19. gxf3 Qf4+ 20. Kf2 Qxh2+ 21. Ke3 Nxc2+ 22. Ke4 Rad8 23. Be3 Rd4+ 24. Bxd4 Qf4+ 25. Kd5 Qxd4# 0-1

[Event "Groningen op"]
[Site "Groningen"]
[Date "2007.04.14"]
[Round "3"]
[White "Van der Marel, Bert"]
[Black "Goetzee, Rick W"]
[Result "1/2-1/2"]
[ECO "D19"]
[WhiteElo "2236"]
[BlackElo "1976"]
[PlyCount "62"]
[EventDate "2007.04.13"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 118 Extra"]
[Source "ChessBase"]
[SourceDate "2007.07.04"]
[SourceVersion "1"]
[SourceVersionDate "2007.07.04"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. 0-0 0-0 9. Qe2 Bg6 10. Ne5 Nbd7 11. Nxg6 hxg6 12. Rd1 Qa5 13. Bd2 Rac8 14. e4 Rfe8 15. e5 Nd5 16. Ne4 Bxd2 17. Rxd2 Red8 18. Nd6 Rb8 19. Rdd1 Ne7 20. Qg4 Nf5 21. Nxf5 gxf5 22. Qe2 Nb6 23. Ba2 c5 24. d5 Nxd5 25. Bxd5 Rxd5 26. Rxd5 exd5 27. e6 Re8 28. exf7+ Kxf7 29. Qh5+ g6 30. Qh7+ Kf6 31. Rf1 Qb6 1/2-1/2

[Event "Groningen op"]
[Site "Groningen"]
[Date "2007.04.14"]
[Round "4"]
[White "Van der Marel, Bert"]
[Black "Hoeksema, Hendrik Pieter"]
[Result "1/2-1/2"]
[ECO "E91"]
[WhiteElo "2236"]
[BlackElo "2386"]
[PlyCount "66"]
[EventDate "2007.04.13"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 118 Extra"]
[Source "ChessBase"]
[SourceDate "2007.07.04"]
[SourceVersion "1"]
[SourceVersionDate "2007.07.04"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 0-0 5. e4 d6 6. Be2 Bg4 7. Be3 Nfd7 8. 0-0 c5 9. d5 Na6 10. Qd2 Qa5 11. Rfc1 Rfb8 12. a3 Qd8 13. h3 Bxf3 14. Bxf3 Nc7 15. Be2 e6 16. Rab1 exd5 17. exd5 Qf8 18. b4 b6 19. Nb5 Nxb5 20. cxb5 Re8 21. Re1 Nf6 22. Bf3 Ne4 23. Bxe4 Rxe4 24. bxc5 bxc5 25. Qa5 Qc8 26. b6 axb6 27. Qxb6 Bf8 28. Qc6 Rea4 29. Bc1 Qf5 30. Rb3 R4a6 31. Qb7 R6a7 32. Qc6 Ra6 33. Qb7 R6a7 1/2-1/2

[Event "Eger Agria op"]
[Site "Eger"]
[Date "2005.08.01"]
[Round "9"]
[White "Torok, Sandor"]
[Black "Van der Marel, Bert"]
[Result "0-1"]
[ECO "C33"]
[WhiteElo "2318"]
[BlackElo "2222"]
[PlyCount "78"]
[EventDate "2005.07.18"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "HUN"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 e5 2. f4 exf4 3. Bc4 d5 4. Bxd5 Qh4+ 5. Kf1 Nf6 6. Nf3 Qh6 7. Nc3 Bb4 8. e5 Bxc3 9. exf6 Bxf6 10. Qe2+ Kf8 11. b3 g6 12. Ne5 Qg5 13. Bb2 Nd7 14. h4 Qf5 15. Be4 Qe6 16. Bxb7 Bxe5 17. Bxe5 Bxb7 18. Bxh8 Qxe2+ 19. Kxe2 f6 20. h5 g5 21. h6 Kf7 22. Bg7 Bxg2 23. Rhe1 Ne5 24. d4 f3+ 25. Kf2 Ng6 26. Re3 Rd8 27. Rc3 Rd7 28. Rc6 Rd6 29. Rxc7+ Ke6 30. Re1+ Kf5 31. Rf7 Nf4 32. Bxf6 Rxf6 33. Rxh7 Kg6 34. Rhe7 Kxh6 35. Kg3 Nh5+ 36. Kf2 g4 37. R7e6 g3+ 38. Kg1 Bh3 39. Rxf6+ Nxf6 0-1

[Event "Eger Agria op"]
[Site "Eger"]
[Date "2005.07.31"]
[Round "8"]
[White "Van der Marel, Bert"]
[Black "Krivolapov, Konstantin"]
[Result "1/2-1/2"]
[ECO "A81"]
[WhiteElo "2222"]
[BlackElo "2352"]
[PlyCount "120"]
[EventDate "2005.07.18"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "HUN"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. d4 f5 2. Nf3 Nf6 3. g3 g6 4. Bg2 Bg7 5. 0-0 0-0 6. b4 e6 7. c4 d6 8. Bb2 Qe7 9. Nbd2 Ne4 10. Nxe4 fxe4 11. Ne1 d5 12. Qb3 c6 13. f3 exf3 14. Nxf3 Nd7 15. Rae1 Kh8 16. e4 dxc4 17. Qxc4 e5 18. d5 Nb6 19. Qc5 Qxc5+ 20. bxc5 Nc4 21. Ba1 b6 22. Ng5 h6 23. Rxf8+ Bxf8 24. Nf7+ Kg8 25. Nxe5 Bxc5+ 26. Kf1 Nxe5 27. Bxe5 cxd5 28. exd5 Bd7 29. Bf4 g5 30. d6 Re8 31. Bd5+ Kh7 32. Rxe8 Bxe8 33. Be5 Kg6 34. g4 Bd7 35. h3 b5 36. Kg2 a5 37. Kf3 Ba3 38. Ke2 Bc5 39. Kd2 Bb4+ 40. Kc2 Bc5 41. Kb2 Be3 42. Kb3 Bc5 43. Kc3 Ba3 44. Kd4 Bb2+ 45. Ke4 Ba3 46. Bb7 h5 47. Kd5 hxg4 48. hxg4 Bxg4 49. Kc6 Bf3+ 50. Kc7 Bxb7 51. d7 Be7 52. Bd6 Bf6 53. Kxb7 Kf5 54. Bc7 a4 55. Kc6 b4 56. Kd5 b3 57. axb3 axb3 58. Be5 Bd8 59. Bc3 g4 60. Kc4 Ke6 1/2-1/2

[Event "Eger Agria op"]
[Site "Eger"]
[Date "2005.07.30"]
[Round "7"]
[White "Nemeth, Balazs"]
[Black "Van der Marel, Bert"]
[Result "0-1"]
[ECO "C47"]
[WhiteElo "1902"]
[BlackElo "2222"]
[PlyCount "106"]
[EventDate "2005.07.18"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "HUN"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. Nxc6 bxc6 7. Bg5 h6 8. Bh4 Qe7 9. f3 d5 10. Qd4 g5 11. Bg3 c5 12. Qe5 d4 13. a3 Ba5 14. b4 cxb4 15. Qxa5 bxc3 16. Qxc7 Nd7 17. Qc6 0-0 18. Qxa8 Nc5 19. Qc6 Rd8 20. Bc7 Rd7 21. Bd6 Qxd6 22. Qxc8+ Rd8 23. Qf5 d3 24. Bxd3 Nxd3+ 25. cxd3 Qb6 26. Qe5 Qe3+ 27. Kf1 c2 28. Qc3 Rxd3 29. Qxc2 Rd2 30. Qxd2 Qxd2 31. Re1 h5 32. h4 g4 33. Re2 Qd3 34. fxg4 hxg4 35. h5 g3 36. Rh4 Kh7 37. Ke1 Qxa3 38. Kd2 a5 39. Rh1 a4 40. Ree1 Qb2+ 41. Kd3 Qxg2 42. Rhg1 Qb2 43. Ke3 Qf2+ 44. Kd3 g2 45. Kc3 a3 46. e5 Qb2+ 47. Kc4 a2 48. Kd5 Qd2+ 49. Kc5 Kg7 50. Rd1 Qf2+ 51. Kd6 Kh6 52. Rge1 Kxh5 53. e6 Qb6+ 0-1

[Event "Eger Agria op"]
[Site "Eger"]
[Date "2005.07.29"]
[Round "6"]
[White "Van der Marel, Bert"]
[Black "Balazs, Andras"]
[Result "1-0"]
[ECO "D37"]
[WhiteElo "2222"]
[BlackElo "2077"]
[PlyCount "59"]
[EventDate "2005.07.18"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "HUN"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 e6 3. c4 a6 4. cxd5 exd5 5. Nc3 Nf6 6. Bg5 Be7 7. e3 0-0 8. Bd3 c6 9. Qc2 b5 10. Bxf6 Bxf6 11. Bxh7+ Kh8 12. Bd3 Be6 13. 0-0 Bg4 14. Nd2 Qd6 15. Bf5 Bxf5 16. Qxf5 g6 17. Qd3 Qd7 18. Nb3 Kg7 19. Nc5 Qd6 20. f4 Rh8 21. h3 Rh5 22. Nd1 Be7 23. Nf2 Qc7 24. Ng4 Qd6 25. Ne5 f5 26. Rf3 a5 27. Rg3 Rh6 28. Qxf5 Qf6 29. Qc8 Rh8 30. Qb7 1-0

[Event "Eger Agria op"]
[Site "Eger"]
[Date "2005.07.28"]
[Round "5"]
[White "Gal, Jozsef Istvan"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "2348"]
[BlackElo "2222"]
[PlyCount "85"]
[EventDate "2005.07.18"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "HUN"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. g3 c5 4. Bg2 cxd4 5. Nxd4 d5 6. 0-0 e5 7. Nb3 Be7 8. N1d2 Nc6 9. c4 Be6 10. cxd5 Bxd5 11. e4 Be6 12. Qe2 0-0 13. f4 a5 14. f5 Bd7 15. Nf3 a4 16. Nbd2 Qb6+ 17. Kh1 Nd4 18. Nc4 Qa6 19. Nxd4 exd4 20. Bg5 Bb5 21. Rac1 h6 22. Bh4 Rad8 23. Qd3 Bd6 24. Bxf6 gxf6 25. b3 axb3 26. axb3 Be5 27. Qd2 Kh7 28. Ra1 Bxc4 29. bxc4 Qxc4 30. Rac1 Qa6 31. Rf3 Rg8 32. Bf1 Qd6 33. Bc4 Rd7 34. Bd5 Rc7 35. Rb1 Rc3 36. Bxf7 Rxf3 37. Rxb7 Rg7 38. Bg6+ Kg8 39. Qa2+ Rb3 40. Qxb3+ Kh8 41. Rxg7 Kxg7 42. Qb7+ Kh8 43. Qh7# 1-0

[Event "Eger Agria op"]
[Site "Eger"]
[Date "2005.07.27"]
[Round "4"]
[White "Van der Marel, Bert"]
[Black "Blasko, Istvan"]
[Result "1/2-1/2"]
[ECO "A57"]
[WhiteElo "2222"]
[BlackElo "2323"]
[PlyCount "149"]
[EventDate "2005.07.18"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "HUN"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3 e6 6. e4 Bb7 7. bxa6 Nxa6 8. Bc4 Qb6 9. Nf3 Be7 10. 0-0 0-0 11. b3 Nb4 12. Bb2 Nxe4 13. Nxe4 exd5 14. Ned2 dxc4 15. Nxc4 Qc7 16. Ne3 Be4 17. Nd2 Bg6 18. Ndc4 Rfe8 19. Nd5 Nxd5 20. Qxd5 Bf8 21. Be5 Qc6 22. Qxc6 dxc6 23. Rfd1 Bc2 24. Rdc1 Bd3 25. Bd6 Bxc4 26. Bxf8 Bxb3 27. Bxc5 Bxa2 28. h3 h5 29. Rc3 Bd5 30. Rxa8 Rxa8 31. Kh2 Kh7 32. Rg3 g6 33. Ra3 Rb8 34. h4 Kg7 35. Bd4+ Kf8 36. Ra7 Rc8 37. Bc5+ Kg7 38. f3 Kf6 39. Kg3 Ke5 40. Ra4 Be6 41. Rd4 Ra8 42. Rd2 Ra2 43. Bd6+ Kf5 44. Rd4 Bd5 45. Rd3 Ke6 46. Bb4 Kd7 47. Rd4 Ke6 48. Kf4 Rc2 49. Rd2 Rxd2 50. Bxd2 Bc4 51. g4 Be2 52. gxh5 gxh5 53. Bc3 Kd5 54. Ke3 Bd1 55. f4 Bc2 56. Bg7 Ke6 57. Bc3 Kf5 58. Bb4 Bb1 59. Kf3 Bc2 60. Bd6 Be4+ 61. Ke3 Bd5 62. Bc5 Kg4 63. Be7 Kg3 64. Bg5 Kg4 65. Be7 Bg2 66. Bf6 c5 67. Bg5 c4 68. Kd4 Bf1 69. Ke5 c3 70. f5 c2 71. f6 Bg2 72. Kd4 Bf3 73. Kd3 c1Q 74. Bxc1 Kxh4 75. Bf4 1/2-1/2

[Event "Eger Agria op"]
[Site "Eger"]
[Date "2005.07.26"]
[Round "3"]
[White "Cierny, Lubomir"]
[Black "Van der Marel, Bert"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "2038"]
[BlackElo "2222"]
[PlyCount "70"]
[EventDate "2005.07.18"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "HUN"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 d5 3. d4 c6 4. Bg2 Bg4 5. 0-0 Nbd7 6. h3 Bh5 7. Nbd2 e6 8. b3 Bd6 9. Bb2 a5 10. c4 0-0 11. c5 Bc7 12. a3 Re8 13. Ne5 Nxe5 14. dxe5 Nd7 15. b4 Nxe5 16. f4 Nd3 17. Bc3 d4 18. Nf3 Nxf4 19. Bxd4 Nxg2 20. Kxg2 e5 21. Bc3 e4 22. Nd4 Qg5 23. Nf5 Rad8 24. Nd6 Re6 25. Qe1 Bxd6 26. cxd6 Rexd6 27. g4 Bg6 28. Qg3 h5 29. Rf4 h4 30. Qf2 e3 31. Qxe3 Re6 32. Qf3 Rxe2+ 33. Kg1 Rd3 34. Qxe2 Qxf4 35. Be1 Qd4+ 0-1

[Event "Eger Agria op"]
[Site "Eger"]
[Date "2005.07.25"]
[Round "2"]
[White "Van der Marel, Bert"]
[Black "Reiss, Tibor"]
[Result "0-1"]
[ECO "D15"]
[WhiteElo "2222"]
[BlackElo "2397"]
[PlyCount "100"]
[EventDate "2005.07.18"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "HUN"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 a6 5. c5 Nbd7 6. b4 g6 7. Bg5 Bg7 8. e3 h6 9. Bh4 Nh5 10. g4 g5 11. gxh5 gxh4 12. Nxh4 e6 13. Nf3 e5 14. Rg1 Qf6 15. Bh3 exd4 16. Qxd4 Qxd4 17. exd4 Bf6 18. 0-0-0 Nf8 19. Bxc8 Rxc8 20. Ne2 Ne6 21. Rg4 Ke7 22. Ng3 Bg5+ 23. Kc2 Bf4 24. Re1 Bc7 25. Ne5 Kf6 26. Re3 Nxd4+ 27. Rxd4 Bxe5 28. Rg4 Rcg8 29. Rf3+ Ke6 30. h3 Rxg4 31. hxg4 Rg8 32. Nf5 Rxg4 33. Nxh6 Rc4+ 34. Kb3 Rf4 35. Re3 f6 36. Rh3 Rxf2 37. Ng4 Rg2 38. Rh4 Rg3+ 39. Ka4 Kf5 40. Nf2 Kg5 41. Rh1 Kh6 42. Ka5 Bc7+ 43. Ka4 Rg2 44. Nd1 Rxa2+ 45. Kb3 Rg2 46. Rh3 Rg3+ 47. Rxg3 Bxg3 48. Ne3 Kxh5 49. Nf5 Kg4 50. Nd6 f5 0-1

[Event "Eger Agria op"]
[Site "Eger"]
[Date "2005.07.24"]
[Round "1"]
[White "Hollenstein, Walter"]
[Black "Van der Marel, Bert"]
[Result "0-1"]
[ECO "C88"]
[WhiteElo "1944"]
[BlackElo "2222"]
[PlyCount "52"]
[EventDate "2005.07.18"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "HUN"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 Bb7 8. c3 d5 9. exd5 Nxd5 10. d3 Nf4 11. Bxf4 exf4 12. Ng5 0-0 13. Ne4 Ne5 14. d4 Ng6 15. Nbd2 Qd7 16. Qh5 Nh4 17. Ng5 Bxg5 18. Qxg5 Nxg2 19. Re7 Qd8 20. Qe5 Rc8 21. Ne4 Nh4 22. Ng5 Ng6 23. Rxf7 Nxe5 24. Rxf8+ Kxf8 25. Ne6+ Ke7 26. Nxd8 Nf3+ 0-1

[Event "Groningen op-A"]
[Site "Groningen"]
[Date "2004.12.30"]
[Round "9"]
[White "Van der Marel, Bert"]
[Black "Burggraaf, Jan Theodoor"]
[Result "1-0"]
[ECO "A56"]
[WhiteElo "2201"]
[PlyCount "85"]
[EventDate "2004.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 104 Extra"]
[Source "ChessBase"]
[SourceDate "2005.03.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.03.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 Ne4 4. Qc2 Qa5+ 5. Nd2 Nf6 6. e4 d6 7. b3 e5 8. Bb2 Nbd7 9. Ngf3 g6 10. g3 Bh6 11. Bc3 Qc7 12. a4 a5 13. Bg2 0-0 14. 0-0 Nh5 15. Ne1 f5 16. Nd3 Ndf6 17. f4 Ng4 18. Rae1 fxe4 19. Bxe4 exf4 20. Nxf4 Nxf4 21. gxf4 Bg7 22. Nf3 Nf6 23. Bd3 Bh3 24. Rf2 Rae8 25. Ng5 Rxe1+ 26. Bxe1 Ng4 27. Nxh3 Bd4 28. Qe2 Nxf2 29. Bxf2 Bxf2+ 30. Qxf2 Qf7 31. Qh4 Qg7 32. Ng5 Qd4+ 33. Kg2 h5 34. Bxg6 Qxf4 35. Qxf4 Rxf4 36. Bxh5 Rd4 37. Bf7+ Kh8 38. Be6 Rd2+ 39. Kg3 Rd3+ 40. Kg4 Rxb3 41. Nf7+ Kg7 42. Nxd6 Rb4 43. Bd7 1-0

[Event "Groningen op-A"]
[Site "Groningen"]
[Date "2004.12.29"]
[Round "8"]
[White "Costello, Colin"]
[Black "Van der Marel, Bert"]
[Result "0-1"]
[ECO "A55"]
[WhiteElo "2067"]
[BlackElo "2201"]
[PlyCount "70"]
[EventDate "2004.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 104 Extra"]
[Source "ChessBase"]
[SourceDate "2005.03.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.03.01"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 c6 3. e4 e5 4. Nf3 d6 5. d4 Qc7 6. Be2 Be7 7. 0-0 Nbd7 8. b3 Nf8 9. Bb2 Ng6 10. Qc2 0-0 11. c5 dxc5 12. dxe5 Ng4 13. Na4 Nf4 14. Rac1 b5 15. Nc3 f5 16. Rfe1 fxe4 17. Nxe4 Nxe2+ 18. Qxe2 Be6 19. h3 Nh6 20. Nf6+ Kh8 21. Qe4 Bf5 22. Qh4 Ng8 23. g4 Bg6 24. g5 Rad8 25. Nh2 Rd2 26. Bc3 Rd3 27. Nhg4 Qd8 28. Ba1 c4 29. Nxh7 Bxh7 30. Nf6 Nh6 31. gxh6 gxf6 32. exf6 Bxf6 33. Re8 Rg8+ 34. Kh1 Qd5+ 35. Kh2 Qg2# 0-1

[Event "Groningen op-A"]
[Site "Groningen"]
[Date "2004.12.28"]
[Round "7"]
[White "Van der Marel, Bert"]
[Black "Haveman, Koen"]
[Result "1-0"]
[ECO "D58"]
[WhiteElo "2201"]
[PlyCount "91"]
[EventDate "2004.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 104 Extra"]
[Source "ChessBase"]
[SourceDate "2005.03.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.03.01"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 h6 6. Bh4 0-0 7. e3 b6 8. Rc1 Bb7 9. Bxf6 Bxf6 10. cxd5 exd5 11. b4 c6 12. Bd3 a5 13. b5 c5 14. 0-0 Nd7 15. Bb1 Rc8 16. Qd3 g6 17. Ne2 Qe7 18. Nf4 c4 19. Qc2 Rfe8 20. h4 Bg7 21. h5 g5 22. Ne2 g4 23. Nh2 Qh4 24. Qh7+ Kf8 25. Ng3 Qg5 26. Qf5 Nf6 27. Qxg5 hxg5 28. Bf5 Rc7 29. Nxg4 Nxg4 30. Bxg4 Kg8 31. Bf5 Bc8 32. Bxc8 Rexc8 33. Rc3 Bf8 34. Nf5 Bb4 35. Rc2 Ba3 36. g4 c3 37. f3 Rc4 38. Kf2 R8c7 39. Rb1 Bb2 40. Nd6 Ra4 41. Ne8 Rcc4 42. Nf6+ Kf8 43. Nxd5 Rxa2 44. Ke2 Rb4 45. Kd3 Ra3 46. h6 1-0

[Event "Groningen op-A"]
[Site "Groningen"]
[Date "2004.12.27"]
[Round "6"]
[White "Otte, Marijn Willem"]
[Black "Van der Marel, Bert"]
[Result "1-0"]
[ECO "C39"]
[BlackElo "2201"]
[PlyCount "47"]
[EventDate "2004.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 104 Extra"]
[Source "ChessBase"]
[SourceDate "2005.03.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.03.01"]
[SourceQuality "1"]

1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 d6 6. Nxg4 Nf6 7. Nxf6+ Qxf6 8. Nc3 Nc6 9. Bb5 Rg8 10. Qf3 Bd7 11. Nd5 Qe5 12. c3 0-0-0 13. d4 Qg7 14. 0-0 Bg4 15. Qf2 f3 16. Kh2 fxg2 17. Rg1 Be6 18. Nf6 Be7 19. Nxg8 Rxg8 20. Rxg2 Bg4 21. h5 d5 22. Be2 Bd6+ 23. Kh1 f5 24. exf5 1-0

[Event "Groningen op-A"]
[Site "Groningen"]
[Date "2004.12.26"]
[Round "5"]
[White "Van der Marel, Bert"]
[Black "Jelic, Bruno"]
[Result "0-1"]
[ECO "E92"]
[WhiteElo "2201"]
[PlyCount "124"]
[EventDate "2004.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 104 Extra"]
[Source "ChessBase"]
[SourceDate "2005.03.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.03.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 e5 7. d5 a5 8. Bg5 h6 9. Bh4 Na6 10. 0-0 Nc5 11. Nd2 Bd7 12. Qc2 g5 13. Bg3 h5 14. f3 Bh6 15. Bf2 Kh8 16. Be3 Rg8 17. Nb3 b6 18. Nxc5 bxc5 19. Qd2 Rg6 20. b3 Kg7 21. g3 g4 22. f4 exf4 23. Bxf4 Qe7 24. Qb2 Bxf4 25. Rxf4 Qe5 26. Nd1 h4 27. Bd3 hxg3 28. hxg3 Qxb2 29. Nxb2 Nh5 30. Rf2 Nxg3 31. Kg2 Nh5 32. e5 Rg5 33. Raf1 Be8 34. Rf5 Rxf5 35. Rxf5 Kh6 36. exd6 cxd6 37. Be2 Kg6 38. Bxg4 Bd7 39. Rxh5 Bxg4 40. Rh2 Re8 41. Kf1 f5 42. Nd3 Kg5 43. Rd2 Re3 44. Kf2 f4 45. Kg2 Bf5 46. Nf2 Kh4 47. Rb2 f3+ 48. Kf1 Rc3 49. Rd2 Rc1+ 50. Rd1 Rc2 51. Ra1 Kg3 52. Nh1+ Kf4 53. Nf2 Rb2 54. Kg1 Re2 55. Kf1 Kg3 56. Nh1+ Kh2 57. Nf2 Bh3+ 58. Nxh3 Kxh3 59. Kg1 Kg3 60. Rf1 Rg2+ 61. Kh1 Rh2+ 62. Kg1 f2+ 0-1

[Event "Groningen op-A"]
[Site "Groningen"]
[Date "2004.12.24"]
[Round "4"]
[White "Akotchik, Victor"]
[Black "Van der Marel, Bert"]
[Result "0-1"]
[ECO "A43"]
[BlackElo "2201"]
[PlyCount "120"]
[EventDate "2004.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 104 Extra"]
[Source "ChessBase"]
[SourceDate "2005.03.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.03.01"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 c5 3. d5 e6 4. dxe6 fxe6 5. Nc3 d5 6. Bg5 Be7 7. e3 Nc6 8. Bb5 0-0 9. 0-0 Bd7 10. h3 a6 11. Bxc6 Bxc6 12. Ne5 Be8 13. a4 Bd6 14. Ng4 Qc7 15. Nxf6+ gxf6 16. Bh6 Rf7 17. Qg4+ Kh8 18. Qxe6 Bc6 19. Nxd5 Rg8 20. Rfd1 Qd7 21. Qxd7 Rxd7 22. a5 Bxd5 23. Rxd5 Bh2+ 24. Kxh2 Rxd5 25. e4 Rd4 26. f3 Rgd8 27. c3 Rd1 28. Ra3 Rb1 29. Rb3 Rd7 30. Rb6 Kg8 31. Rxf6 Rf7 32. Rd6 Rc7 33. Rf6 Rf7 34. Rd6 Rc7 35. Rb6 Rc6 36. Rxc6 bxc6 37. Be3 c4 38. g4 Rxb2+ 39. Kg3 Rb3 40. Bd4 Ra3 41. e5 Rxa5 42. e6 Rd5 43. Kf4 a5 44. Be3 Rd3 45. Ke4 a4 46. Bc5 Rxc3 47. f4 Rb3 48. f5 Rb5 49. Bd4 a3 50. f6 a2 51. Bc3 Rb3 52. Bd4 Rb5 53. Bc3 Rb1 54. Bd4 Re1+ 55. Kf5 Rf1+ 56. Ke4 a1Q 57. f7+ Kf8 58. Bc5+ Kg7 59. Bd4+ Qxd4+ 60. Kxd4 Re1 0-1

[Event "Groningen op-A"]
[Site "Groningen"]
[Date "2004.12.23"]
[Round "3"]
[White "Van der Marel, Bert"]
[Black "Van Kesteren, Stef"]
[Result "1-0"]
[ECO "E15"]
[WhiteElo "2201"]
[PlyCount "87"]
[EventDate "2004.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 104 Extra"]
[Source "ChessBase"]
[SourceDate "2005.03.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.03.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb7 6. Bg2 Bb4+ 7. Bd2 a5 8. 0-0 0-0 9. Nc3 d5 10. a3 Be7 11. Bc1 Nbd7 12. Bb2 Rb8 13. Qc2 c5 14. cxd5 exd5 15. Rfd1 Qc8 16. Rac1 Ne4 17. dxc5 Nxc3 18. Bxc3 Nxc5 19. Qb2 f6 20. Ne1 Qe6 21. Bd4 Rfe8 22. b4 axb4 23. axb4 Ne4 24. Nd3 Nd6 25. Nf4 Qf7 26. Rc7 Ba8 27. Ra1 Ne4 28. Raa7 g5 29. Nd3 Qe6 30. Qa2 Kf8 31. e3 Nd6 32. Qa4 Nf5 33. Bh3 Qe4 34. Bxf5 Qxf5 35. Qa3 Qf3 36. Rxe7 Rxe7 37. Rxa8 Rxa8 38. Qxa8+ Kf7 39. Ne1 Qe2 40. Qxd5+ Kf8 41. Nf3 g4 42. Nh4 Qd1+ 43. Kg2 Rxe3 44. Bc5+ 1-0

[Event "Groningen op-A"]
[Site "Groningen"]
[Date "2004.12.22"]
[Round "2"]
[White "Van der Marel, Bert"]
[Black "De Vrieze, Michael"]
[Result "0-1"]
[ECO "A56"]
[WhiteElo "2201"]
[PlyCount "122"]
[EventDate "2004.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 104 Extra"]
[Source "ChessBase"]
[SourceDate "2005.03.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.03.01"]
[SourceQuality "1"]

1. d4 c5 2. d5 e5 3. c4 d6 4. e4 Be7 5. Nf3 Nf6 6. Nc3 Nbd7 7. Bd3 h6 8. h3 Nf8 9. Be3 Ng6 10. Qd2 Bd7 11. a4 a5 12. Nb5 b6 13. Rc1 0-0 14. g4 Nh7 15. b3 Bxb5 16. cxb5 Ng5 17. Ng1 Nh4 18. Kd1 Ngf3 19. Nxf3 Nxf3 20. Qe2 Nh4 21. f4 exf4 22. Bxf4 Bg5 23. Rf1 Re8 24. Qf2 Ra7 25. Kc2 Ng6 26. Bxg5 hxg5 27. Rce1 Re5 28. Qd2 Nh4 29. Rf2 f6 30. Ref1 Qe7 31. Re2 Rc7 32. Kb2 Kf8 33. Ref2 Ke8 34. Rc1 Kd8 35. Rc4 Kc8 36. Qc1 Kb8 37. Ka1 Rc8 38. Rfc2 Rh8 39. Qg1 Qa7 40. Qe3 Ng6 41. Bf1 Nf4 42. Qf2 Ree8 43. Qg3 Qe7 44. Rf2 Qe5+ 45. Ka2 Kb7 46. Rf3 Rh4 47. Qf2 Reh8 48. Rcc3 Ng6 49. Bg2 Qh2 50. e5 Qxe5 51. Rfe3 Qf4 52. Qc2 Ne5 53. Re4 Qh2 54. Qf2 Rxh3 55. Rxh3 Rxh3 56. Rxe5 dxe5 57. d6+ Ka7 58. d7 Rd3 59. d8Q Rxd8 60. Qf3 e4 61. Qxe4 Rd2+ 0-1

[Event "Leeuwarden op"]
[Site "Leeuwarden"]
[Date "2004.??.??"]
[Round "7"]
[White "Bax, Frank"]
[Black "Van der Marel, Bert"]
[Result "1/2-1/2"]
[ECO "C45"]
[BlackElo "2186"]
[PlyCount "61"]
[EventDate "2004.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 103 Extra"]
[Source "ChessBase"]
[SourceDate "2005.01.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.01.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. e5 Qe7 7. Qe2 Nd5 8. c4 Nb6 9. Nd2 Qe6 10. b3 a5 11. a4 Bb4 12. Bb2 Ba6 13. 0-0-0 0-0 14. Qf3 d5 15. exd6 cxd6 16. Bd3 d5 17. Rhe1 Bxd2+ 18. Kxd2 Qh6+ 19. Kc2 dxc4 20. Be4 cxb3+ 21. Kb1 Nc4 22. Bc1 Qf6 23. Qxf6 gxf6 24. Rd3 Kh8 25. Rh3 Rfe8 26. Rxh7+ Kg8 27. Rh3 f5 28. Rg3+ Kh8 29. Rh3+ Kg7 30. Rg3+ Kh8 31. Rh3+ 1/2-1/2

[Event "Leeuwarden op"]
[Site "Leeuwarden"]
[Date "2004.??.??"]
[Round "9"]
[White "Kuitert, Christian"]
[Black "Van der Marel, Bert"]
[Result "0-1"]
[ECO "C26"]
[BlackElo "2186"]
[PlyCount "104"]
[EventDate "2004.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 103 Extra"]
[Source "ChessBase"]
[SourceDate "2005.01.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.01.01"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Bc5 3. g3 Nf6 4. Bg2 Nc6 5. d3 a6 6. h3 d6 7. Nge2 Be6 8. 0-0 Qd7 9. Kh2 h5 10. Nd5 h4 11. Nxf6+ gxf6 12. g4 d5 13. f4 dxe4 14. f5 Bd5 15. Nc3 Ne7 16. Bxe4 c6 17. Qf3 0-0-0 18. Be3 Bxe3 19. Qxe3 Qc7 20. Rfb1 Bxe4 21. Nxe4 Nd5 22. Qf2 Nf4 23. Rf1 Rd4 24. Rae1 Qd8 25. Nd2 Qd6 26. Re4 c5 27. Rxd4 cxd4 28. Ne4 Qc6 29. a3 Kb8 30. Rd1 Rc8 31. Rd2 Nd5 32. Qxh4 Ne3 33. Kg1 Qb6 34. b4 Nxc2 35. Nc5 Rxc5 36. bxc5 Qb1+ 37. Kh2 Ne3 38. Qf2 Nf1+ 39. Kg2 Ne3+ 40. Kg3 Qc1 41. Rb2 Qxc5 42. Qe1 Qc7 43. Qb4 e4+ 44. Kh4 Nxf5+ 45. Kh5 Qc8 46. g5 Qh8+ 47. Kg4 Qc8 48. dxe4 Nd6+ 49. Kh4 Nxe4 50. gxf6 Qc7 51. Kg4 Qg3+ 52. Kf5 Nd6+ 0-1

[Event "Leeuwarden op"]
[Site "Leeuwarden"]
[Date "2004.??.??"]
[Round "3"]
[White "Van der Marel, Bert"]
[Black "Delleman, Michiel"]
[Result "0-1"]
[ECO "E70"]
[WhiteElo "2186"]
[PlyCount "104"]
[EventDate "2004.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 103 Extra"]
[Source "ChessBase"]
[SourceDate "2005.01.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.01.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nge2 0-0 6. Ng3 Nfd7 7. Be3 e5 8. d5 f5 9. exf5 gxf5 10. Nh5 Bh8 11. Bh6 Rf7 12. g4 Nc5 13. gxf5 Bxf5 14. Rg1+ Bg6 15. Qc2 e4 16. 0-0-0 Qh4 17. Be2 Nba6 18. a3 Rf5 19. Be3 Rxh5 20. Rg4 Qe7 21. Rdg1 Kf7 22. Rxg6 hxg6 23. Bxh5 gxh5 24. Qd1 Qh4 25. Rg5 Rg8 26. Rxh5 Qf6 27. Rh7+ Kf8 28. Qh5 Bg7 29. Qh3 Rh8 30. Qc8+ Kf7 31. Rxh8 Bxh8 32. Bxc5 Nxc5 33. Qxc7+ Kg6 34. Qc8 Qe5 35. Qh3 Bf6 36. Kc2 Qf4 37. Qg3+ Kf5 38. Nb5 Be5 39. b4 Nd3 40. Qxf4+ Kxf4 41. Nc7 Kf3 42. Ne6 Kxf2 43. Ng5 Ne1+ 44. Kd1 e3 45. Nh3+ Kf1 46. Ng1 Kxg1 47. Kxe1 b6 48. Ke2 Bf4 49. h4 Kg2 50. a4 Kg3 51. c5 dxc5 52. bxc5 bxc5 0-1

[Event "Leeuwarden op"]
[Site "Leeuwarden"]
[Date "2004.??.??"]
[Round "1"]
[White "Van der Marel, Bert"]
[Black "Van der Laar, Bert"]
[Result "1-0"]
[ECO "D15"]
[WhiteElo "2186"]
[PlyCount "79"]
[EventDate "2004.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 103 Extra"]
[Source "ChessBase"]
[SourceDate "2005.01.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.01.01"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 Bf5 5. Qb3 b6 6. cxd5 Nxd5 7. Ne5 e6 8. Nxd5 exd5 9. Bf4 Bd6 10. Rc1 f6 11. Nd3 Bxd3 12. Bxd6 Bc4 13. Qg3 Kf7 14. b3 Ba6 15. Bb4 Re8 16. Qd6 Qxd6 17. Bxd6 Re6 18. Bb4 Nd7 19. h4 Rc8 20. Rh3 c5 21. dxc5 Nxc5 22. Bxc5 Rxc5 23. Rhc3 Rec6 24. Kd2 Ke6 25. g3 Rxc3 26. Rxc3 Rc5 27. Bh3+ Kf7 28. e3 g6 29. b4 Rxc3 30. Kxc3 f5 31. Kd4 Ke6 32. a3 Bb5 33. Bg2 Bc6 34. Bf1 Kd6 35. Bd3 Ba4 36. h5 Bd1 37. h6 Ke6 38. Bb5 Kd6 39. Be8 Bh5 40. Bf7 1-0

[Event "Groningen SO ON op A"]
[Site "Groningen"]
[Date "2001.12.27"]
[Round "5"]
[White "Van der Marel, Bert"]
[Black "Meis, Eric"]
[Result "1-0"]
[ECO "B20"]
[WhiteElo "2229"]
[BlackElo "2095"]
[PlyCount "81"]
[EventDate "2001.12.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 d6 2. f4 c5 3. Nf3 Nc6 4. g3 g6 5. Bg2 Bg7 6. 0-0 e6 7. d3 Nge7 8. c3 0-0 9. Na3 d5 10. e5 a6 11. Nc2 b5 12. Be3 c4 13. dxc4 bxc4 14. b3 cxb3 15. axb3 Bb7 16. Bc5 Qd7 17. Ncd4 Rfc8 18. b4 Bf8 19. g4 Nxd4 20. cxd4 Bc6 21. f5 exf5 22. gxf5 Nxf5 23. Bh3 Bh6 24. Nh4 Nxh4 25. Bxd7 Bxd7 26. Ra3 Nf5 27. Qa1 Bb5 28. Rxf5 gxf5 29. Rg3+ Kh8 30. Be7 Rc6 31. Bf6+ Rxf6 32. exf6 Rc8 33. Qe1 Re8 34. Qb1 Bd2 35. Qxf5 Re4 36. Kg2 Bf1+ 37. Kf2 Bb5 38. Qc8+ Re8 39. Qg4 Re2+ 40. Kf3 Re3+ 41. Kg2 1-0

