[Event "Dieren op"]
[Site "Dieren"]
[Date "2023.08.03"]
[Round "9"]
[White "Kools, Thomas"]
[Black "Otten, Martijn"]
[Result "0-1"]
[ECO "B31"]
[WhiteElo "2112"]
[BlackElo "2166"]
[PlyCount "72"]
[EventDate "2023.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. Bxc6 bxc6 5. d4 cxd4 6. Qxd4 f6 7. c4 d6 8. 0-0 c5 9. Qd5 Rb8 10. Nc3 Bb7 11. Qd3 Nh6 12. Nh4 Nf7 13. f4 Bg7 14. f5 Ne5 15. Qe2 g5 16. Nf3 Nf7 17. g4 0-0 18. b3 Re8 19. Rd1 Qc8 20. Bb2 e6 21. Qg2 Qc6 22. Re1 Nh6 23. fxe6 Rxe6 24. Nd5 Rbe8 25. h3 Qd7 26. Qc2 Nf7 27. Kg2 Nh8 28. Nd2 Ng6 29. Nf1 Nf4+ 30. Nxf4 gxf4 31. Kf3 Rxe4 32. Kf2 f5 33. Nh2 Qe7 34. Nf3 Re3 35. Nd2 Rxe1 36. Rxe1 Qxe1# 0-1

[Event "Dieren op"]
[Site "Dieren"]
[Date "2023.08.02"]
[Round "8"]
[White "Noordenbos, Daan"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "D17"]
[WhiteElo "2077"]
[BlackElo "2166"]
[PlyCount "55"]
[EventDate "2023.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 7. Nxc4 Nb6 8. Ne5 a5 9. e3 e6 10. g4 Bg6 11. h4 h6 12. Nxg6 fxg6 13. Bd3 Kf7 14. Qf3 Bb4 15. Bd2 g5 16. hxg5 hxg5 17. Rxh8 Qxh8 18. Ne4 Qh4 19. Ke2 Qxg4 20. Qxg4 Nxg4 21. Bxb4 axb4 22. a5 Nf6 23. Nd6+ Ke7 24. Nxb7 Nc8 25. a6 Nd7 26. Be4 Nb8 27. Nc5 Nd6 28. a7 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2023.08.01"]
[Round "7"]
[White "Otten, Martijn"]
[Black "Decrop, Hendrik"]
[Result "1/2-1/2"]
[ECO "D47"]
[WhiteElo "2166"]
[BlackElo "2033"]
[PlyCount "124"]
[EventDate "2023.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7 9. e4 b4 10. Na4 c5 11. e5 Nd5 12. 0-0 cxd4 13. Nxd4 Nxe5 14. Bb5+ Nd7 15. Re1 Rc8 16. Qh5 g6 17. Qe2 a6 18. Bxa6 Bxa6 19. Qxa6 Bg7 20. Bg5 Nc7 21. Qb7 Rb8 22. Bxd8 Rxb7 23. Nc6 Nd5 24. Rad1 0-0 25. b3 Nb8 26. Nxb8 Rxd8 27. Na6 Rc8 28. Kf1 Nc3 29. Rc1 Bd4 30. Red1 e5 31. Rd3 Ra8 32. N6c5 Rb5 33. Nxc3 Rxc5 34. Ne2 Rxa2 35. Rxd4 exd4 36. Rxc5 d3 37. Rc1 dxe2+ 38. Ke1 Rb2 39. Rc4 Rxb3 40. Kxe2 Rb2+ 41. Kf3 Kg7 42. Rc6 h5 43. h4 Rb3+ 44. Kf4 Rc3 45. Rb6 Rc4+ 46. Kg3 Kf8 47. Rb7 Ke8 48. f3 Rd4 49. Kh3 f6 50. g4 hxg4+ 51. fxg4 Rd3+ 52. Kg2 b3 53. h5 gxh5 54. gxh5 Kf8 55. h6 Kg8 56. Kf2 Rh3 57. Kg2 Rc3 58. Kf2 Rc2+ 59. Ke3 Rh2 60. Ke4 Rb2 61. Kf5 Rb1 62. Kg6 Rg1+ 1/2-1/2

[Event "Dieren op"]
[Site "Dieren"]
[Date "2023.07.28"]
[Round "4"]
[White "Otten, Martijn"]
[Black "Markus, John Raymond"]
[Result "1-0"]
[ECO "A42"]
[WhiteElo "2166"]
[BlackElo "2001"]
[PlyCount "93"]
[EventDate "2023.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 e5 5. Nge2 exd4 6. Nxd4 Ne7 7. h4 h6 8. h5 g5 9. Be3 Nbc6 10. Qd2 0-0 11. 0-0-0 f5 12. f3 f4 13. Bf2 Ne5 14. Be2 a6 15. g3 fxg3 16. Bxg3 c5 17. Nb3 Nxf3 18. Qxd6 Nd4 19. Qxc5 Nxe2+ 20. Nxe2 Qe8 21. Be5 Bxe5 22. Qxe5 Bg4 23. Rd6 Qf7 24. Nc3 Qg7 25. Qxg7+ Kxg7 26. Nc5 Rf2 27. Nd3 Rg2 28. Ne5 Rf8 29. Nxg4 Rxg4 30. Rd7 Rf7 31. Rxb7 Rh4 32. Rd1 g4 33. Rdd7 g3 34. Rxe7 Rxe7 35. Rxe7+ Kf8 36. Re5 g2 37. Ne2 Rh1+ 38. Kd2 Rb1 39. Kc3 Re1 40. Re6 Rxe2 41. Rg6 a5 42. a3 a4 43. b4 Ra2 44. Kd4 Rxa3 45. Rxg2 Rb3 46. b5 a3 47. Rg6 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2023.07.27"]
[Round "3"]
[White "Zwirs, Nico"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "A11"]
[WhiteElo "2443"]
[BlackElo "2166"]
[PlyCount "115"]
[EventDate "2023.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. c4 c6 2. Nf3 d5 3. g3 Nf6 4. Bg2 dxc4 5. 0-0 b5 6. Ne5 Bb7 7. d3 cxd3 8. Qb3 e6 9. Rd1 Qb6 10. Be3 c5 11. Bxb7 Qxb7 12. Qxd3 Nc6 13. Nxc6 Qxc6 14. a4 b4 15. Qb5 Rc8 16. Nd2 Nd5 17. Nc4 Nxe3 18. fxe3 a6 19. Qxc6+ Rxc6 20. Rd3 Be7 21. Rad1 0-0 22. Rd7 Bf6 23. e4 g5 24. e5 Bg7 25. R1d6 Rfc8 26. Ra7 Bxe5 27. Rxc6 Bd4+ 28. e3 Rxc6 29. exd4 cxd4 30. b3 f6 31. Kf2 e5 32. g4 f5 33. gxf5 Rf6 34. Re7 Rxf5+ 35. Ke2 Rf4 36. Rxe5 h6 37. Re6 Rh4 38. Rxa6 Rxh2+ 39. Kd3 Rh3+ 40. Kxd4 Rxb3 41. Rxh6 Kg7 42. Rh1 Rf3 43. a5 Rf6 44. Ra1 Ra6 45. Ne3 b3 46. Kc3 Kf6 47. Kxb3 Ke5 48. Ra4 Kd6 49. Rg4 Ke5 50. Kb4 Ra8 51. Kb5 Rb8+ 52. Kc6 Rb3 53. Rxg5+ Kf4 54. Rg4+ Kf3 55. Rh4 Rxe3 56. Rh3+ Kf4 57. Rxe3 Kxe3 58. a6 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2023.07.26"]
[Round "2"]
[White "Hu, Yu A"]
[Black "Otten, Martijn"]
[Result "0-1"]
[ECO "B31"]
[WhiteElo "2056"]
[BlackElo "2166"]
[PlyCount "52"]
[EventDate "2023.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. 0-0 Bg7 5. c3 Nf6 6. Re1 0-0 7. d4 d5 8. e5 Ne4 9. Be3 Qb6 10. Bxc6 Qxc6 11. dxc5 Bg4 12. b4 f6 13. e6 Ng5 14. Bxg5 fxg5 15. Nd4 Bxd1 16. Nxc6 bxc6 17. Rxd1 a5 18. b5 cxb5 19. Rxd5 b4 20. Nd2 bxc3 21. Nc4 Rf5 22. Rxf5 gxf5 23. Kf1 Rc8 24. Nxa5 Rxc5 25. Nb3 c2 26. Re1 Bc3 0-1

[Event "Dieren op"]
[Site "Dieren"]
[Date "2023.07.25"]
[Round "1"]
[White "Otten, Martijn"]
[Black "Van den Doel, Erik"]
[Result "0-1"]
[ECO "D47"]
[WhiteElo "2166"]
[BlackElo "2576"]
[PlyCount "106"]
[EventDate "2023.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bd6 9. 0-0 0-0 10. a3 Bb7 11. Qe2 a5 12. Rd1 Qb8 13. h3 b4 14. Na4 c5 15. dxc5 Bxc5 16. Bb5 Bd6 17. Qd3 Bxf3 18. gxf3 Ne5 19. Qe2 Nxf3+ 20. Qxf3 Qxb5 21. Rxd6 Qxa4 22. e4 bxa3 23. Rxa3 Qxe4 24. Qxe4 Nxe4 25. Rd4 Rfc8 26. Be3 Nf6 27. Rda4 Nd5 28. Bd4 f6 29. Rxa5 Rxa5 30. Rxa5 Rc4 31. Bc5 g5 32. Kh2 Kf7 33. Ra7+ Kg6 34. Bf8 Rc2 35. Kg3 h5 36. b4 h4+ 37. Kf3 Kf5 38. Ra3 e5 39. Kg2 Rb2 40. Rf3+ Ke6 41. Ra3 Nxb4 42. Bxb4 Rxb4 43. Ra6+ Kf5 44. Ra3 e4 45. Ra5+ Kf4 46. Ra6 f5 47. Ra8 Rb2 48. Re8 Re2 49. Kg1 Kf3 50. Rg8 Rxf2 51. Rxg5 f4 52. Rg4 e3 53. Rxh4 Rg2+ 0-1

[Event "Leiden Noteboom Memorial 82nd"]
[Site "Leiden"]
[Date "2023.02.25"]
[Round "2"]
[White "Otten, Martijn"]
[Black "Van der Werf, Mark"]
[Result "1/2-1/2"]
[ECO "E46"]
[WhiteElo "2160"]
[BlackElo "2392"]
[PlyCount "116"]
[EventDate "2023.02.24"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Nge2 Re8 6. a3 Bf8 7. b4 d5 8. c5 b6 9. Ng3 a5 10. Rb1 axb4 11. axb4 bxc5 12. dxc5 e5 13. Bd3 g6 14. 0-0 h5 15. h3 Bb7 16. Qc2 h4 17. Nge2 Nbd7 18. e4 d4 19. Nd1 Ba6 20. Bg5 Bxd3 21. Qxd3 Ra4 22. Bxh4 Qa8 23. f3 Rb8 24. Be1 Ra3 25. Qc4 Bxc5 26. Nf2 Bd6 27. Bd2 Qa4 28. Qc1 Ra2 29. Ng3 Qc2 30. Qxc2 Rxc2 31. Rfd1 Nb6 32. Nd3 Nc4 33. Bg5 Nh7 34. Bh6 Nf8 35. Rdc1 Rxc1+ 36. Rxc1 Na3 37. Bd2 Ne6 38. h4 Nb5 39. h5 Ra8 40. hxg6 fxg6 41. Nc5 Bxc5 42. bxc5 Ra2 43. Nf1 c6 44. g3 d3 45. Kf2 Ned4 46. Ke3 Ra3 47. f4 Nc2+ 48. Kf2 Ra4 49. Ne3 exf4 50. gxf4 Rxe4 51. Kf3 Re6 52. Nxc2 dxc2 53. Be3 Na3 54. Bd4 Re8 55. Bb2 Rb8 56. Bxa3 Rb3+ 57. Ke4 Rxa3 58. Rxc2 Kf7 1/2-1/2

[Event "Hoogeveen op 23rd"]
[Site "Hoogeveen"]
[Date "2019.10.25"]
[Round "8"]
[White "Vasse, Albert"]
[Black "Otten, Martijn"]
[Result "0-1"]
[ECO "C00"]
[WhiteElo "1934"]
[BlackElo "2101"]
[PlyCount "88"]
[EventDate "2019.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. e4 e6 2. Nf3 d5 3. e5 c5 4. b4 d4 5. Bc4 Nc6 6. bxc5 Bxc5 7. 0-0 Nge7 8. d3 Ng6 9. Bb5 Bd7 10. Bxc6 Bxc6 11. Re1 0-0 12. a4 Qc7 13. Qe2 Bxf3 14. gxf3 Bb4 15. Bd2 Bxd2 16. Nxd2 Qxc2 17. Rec1 Nf4 18. Rxc2 Nxe2+ 19. Kf1 Nf4 20. Ra3 Rac8 21. Nc4 Rc5 22. Ke1 Rfc8 23. Kd2 Ng6 24. Rb3 b6 25. Na3 Nxe5 26. Rxc5 Rxc5 27. Nb5 Nxf3+ 28. Ke2 Nxh2 29. Nxa7 h5 30. Rxb6 Ra5 31. Nc6 Rxa4 32. Rb8+ Kh7 33. Rd8 Ra2+ 34. Ke1 Nf3+ 35. Kf1 e5 36. Rd5 f6 37. Ne7 h4 38. Nf5 h3 39. Ng3 Ra1+ 40. Ke2 Ng5 41. Nf1 Ra2+ 42. Nd2 h2 43. Rd7 h1Q 44. Rxg7+ Kxg7 0-1

[Event "Hoogeveen op 23rd"]
[Site "Hoogeveen"]
[Date "2019.10.24"]
[Round "7"]
[White "Djukic, Sandra"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "D12"]
[WhiteElo "2179"]
[BlackElo "2101"]
[PlyCount "109"]
[EventDate "2019.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. Nc3 e6 6. Nh4 Be4 7. f3 Bg6 8. Qb3 Qc7 9. Nxg6 hxg6 10. f4 Be7 11. Be2 Nbd7 12. Bd2 dxc4 13. Qxc4 a6 14. Rc1 g5 15. b4 gxf4 16. exf4 Nb6 17. Qb3 Qd6 18. d5 Nbxd5 19. 0-0 g5 20. Rcd1 Qc7 21. Nxd5 Nxd5 22. g3 Rg8 23. f5 e5 24. Kg2 0-0-0 25. a4 e4 26. b5 axb5 27. axb5 Nf4+ 28. gxf4 gxf4+ 29. Kh1 f3 30. Bxf3 Rh8 31. Rf2 Rd3 32. Qb2 Rh4 33. Rg1 Rxf3 34. Rg8+ Kd7 35. Qd4+ Bd6 36. b6 Rxf2 37. Qxf2 Rxh2+ 38. Qxh2 Bxh2 39. bxc7 Bxc7 40. Bb4 Bd6 41. Bxd6 Kxd6 42. Kg2 Ke5 43. Kf2 Kxf5 44. Re8 Kf4 45. Re7 f5 46. Rxb7 Ke5 47. Rc7 Kd5 48. Ke3 c5 49. Rc8 c4 50. Rc7 f4+ 51. Kxf4 Kd4 52. Rd7+ Kc3 53. Kxe4 Kb2 54. Rc7 c3 55. Kd3 1-0

[Event "Hoogeveen op 23rd"]
[Site "Hoogeveen"]
[Date "2019.10.23"]
[Round "6"]
[White "Otten, Martijn"]
[Black "Hoffman, Ron"]
[Result "0-1"]
[ECO "A80"]
[WhiteElo "2101"]
[BlackElo "1991"]
[PlyCount "112"]
[EventDate "2019.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. d4 f5 2. Bg5 g6 3. Nd2 Bg7 4. e4 fxe4 5. Nxe4 d5 6. Nc5 b6 7. Nb3 Nh6 8. Nf3 Nf7 9. Bf4 0-0 10. Qd2 c5 11. c3 c4 12. Nc1 Nc6 13. Be2 Bf5 14. 0-0 Qd7 15. Re1 h6 16. Ne5 Ncxe5 17. dxe5 g5 18. Bg3 Rad8 19. f4 b5 20. Qd4 gxf4 21. Bxf4 Ng5 22. a4 Ne6 23. Qd2 Nxf4 24. Qxf4 a6 25. Qd4 Be4 26. h3 Qe6 27. Bg4 Qg6 28. axb5 axb5 29. Qa7 h5 30. Ra6 Qg5 31. Qe3 Qxe3+ 32. Rxe3 hxg4 33. hxg4 Bxe5 34. Ne2 Ra8 35. Rxa8 Rxa8 36. Nd4 b4 37. Nf5 Ra1+ 38. Kf2 Bf4 39. Re2 e6 40. Nd4 bxc3 41. bxc3 Kf7 42. Rb2 Rb1 43. Ra2 Rb7 44. Nc6 Kf6 45. g3 Bc1 46. Nd4 Rb2+ 47. Rxb2 Bxb2 48. Nb5 Bg6 49. Ke3 Be8 50. Nc7 Bd7 51. Kd4 Ba3 52. Na8 Bc6 53. Nc7 e5+ 54. Ke3 Bc5+ 55. Ke2 Bd6 56. Na6 Bb5 0-1

[Event "Hoogeveen op 23rd"]
[Site "Hoogeveen"]
[Date "2019.10.21"]
[Round "4"]
[White "Klaren, Duncan"]
[Black "Otten, Martijn"]
[Result "0-1"]
[ECO "C16"]
[WhiteElo "1923"]
[BlackElo "2101"]
[PlyCount "54"]
[EventDate "2019.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 b6 5. Qg4 Bf8 6. Nf3 Nc6 7. Bd2 Bb7 8. a3 Qd7 9. Bd3 0-0-0 10. 0-0 Kb8 11. b4 f6 12. b5 Na5 13. Rfe1 f5 14. Qf4 g6 15. Qe3 h6 16. Ne2 Nc4 17. Bxc4 dxc4 18. Nf4 Ne7 19. Qc3 g5 20. Nh5 Qxb5 21. a4 Qc6 22. Nf6 Nd5 23. Nxd5 Qxd5 24. Reb1 g4 25. Ne1 Qxd4 26. Qxd4 Rxd4 27. Be3 Rd5 0-1

[Event "Hoogeveen op 23rd"]
[Site "Hoogeveen"]
[Date "2019.10.21"]
[Round "3"]
[White "Otten, Martijn"]
[Black "Ypma, Jord"]
[Result "1/2-1/2"]
[ECO "D45"]
[WhiteElo "2101"]
[BlackElo "2013"]
[PlyCount "93"]
[EventDate "2019.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 a6 6. b3 Bb4 7. Bd2 Nbd7 8. Bd3 0-0 9. 0-0 Bd6 10. Qc2 e5 11. cxd5 cxd5 12. e4 exd4 13. Nxd5 Nxd5 14. exd5 Nf6 15. h3 Bd7 16. Rad1 Rc8 17. Qb2 Rc5 18. Bb4 Rxd5 19. Bxd6 Rxd6 20. Nxd4 Re8 21. Bc2 Qb6 22. Nf3 Bb5 23. Rxd6 Qxd6 24. Rd1 Qc5 25. b4 Qc7 26. Nd4 Qe5 27. Qb3 Be2 28. Nxe2 Qxe2 29. Bd3 Qh5 30. b5 axb5 31. Bxb5 Rf8 32. Bd3 h6 33. Rc1 Qg5 34. Rc7 Nh5 35. Qb5 Qf4 36. Qc4 Qd2 37. Rxb7 Nf4 38. Rxf7 Rxf7 39. Qc8+ Rf8 40. Bc4+ Kh7 41. Qxf8 Qc1+ 42. Bf1 Ne2+ 43. Kh2 Qxf1 44. Qf5+ Kg8 45. Qc8+ Kf7 46. Qf5+ Kg8 47. Qc8+ 1/2-1/2

[Event "Hoogeveen op 23rd"]
[Site "Hoogeveen"]
[Date "2019.10.19"]
[Round "1"]
[White "Romanishin, Oleg M"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "D15"]
[WhiteElo "2441"]
[BlackElo "2101"]
[PlyCount "57"]
[EventDate "2019.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 dxc4 5. e3 b5 6. a4 b4 7. Ne2 e6 8. Nf4 Ba6 9. Ne5 c5 10. Bxc4 Bxc4 11. Nxc4 Nbd7 12. 0-0 Qc7 13. Bd2 Rd8 14. Rc1 Be7 15. Qe2 Qb8 16. e4 cxd4 17. e5 d3 18. Nxd3 Nd5 19. Na5 Qb6 20. Nc6 Ra8 21. Nxe7 Kxe7 22. Qg4 Rag8 23. Nxb4 Nc7 24. Nc6+ Ke8 25. Ba5 Qb7 26. Qb4 Qxb4 27. Nxb4 Nd5 28. Rc8+ Ke7 29. Nc6# 1-0

[Event "Leiden Noteboom Memorial 79th"]
[Site "Leiden"]
[Date "2019.02.23"]
[Round "4"]
[White "Otten, Martijn"]
[Black "Oosterom, Erik"]
[Result "1-0"]
[ECO "D10"]
[WhiteElo "2081"]
[BlackElo "2108"]
[PlyCount "77"]
[EventDate "2019.02.22"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Qb3 Nc6 7. Qxb7 Bd7 8. Nb5 Rc8 9. Bd2 Ne4 10. Nf3 Nxd2 11. Nxd2 e5 12. dxe5 Nb4 13. Rd1 Be7 14. a3 Nc6 15. Nxa7 Rc7 16. Nxc6 Bxc6 17. Qa6 0-0 18. Bb5 Bb7 19. Qa4 Bc5 20. Rc1 Qe7 21. Qf4 Rfc8 22. Ke2 Qe6 23. Rc3 Qb6 24. Rb3 Ba6 25. Qa4 Bxb5+ 26. Rxb5 Qe6 27. Rc1 h6 28. Nb3 Be7 29. Rxc7 Rxc7 30. Rb8+ Kh7 31. Qd4 g6 32. Nd2 Rc1 33. h3 Bc5 34. Qa4 Qxe5 35. Qe8 Qxe8 36. Rxe8 d4 37. Rc8 dxe3 38. fxe3 Rc2 39. b4 1-0

[Event "Leiden Noteboom Memorial 79th"]
[Site "Leiden"]
[Date "2019.02.23"]
[Round "2"]
[White "Otten, Martijn"]
[Black "Van den Bergh, Ben G"]
[Result "1-0"]
[ECO "E79"]
[WhiteElo "2081"]
[BlackElo "1997"]
[PlyCount "67"]
[EventDate "2019.02.22"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. f4 c5 7. Nf3 cxd4 8. Nxd4 Nc6 9. Be3 Nd7 10. Nb3 Na5 11. 0-0 Nxb3 12. axb3 b6 13. Qd5 Rb8 14. Rxa7 Nc5 15. Qd1 Bxc3 16. bxc3 Nxe4 17. Bf3 d5 18. cxd5 Bf5 19. c4 h5 20. Bd4 b5 21. Re1 Nd6 22. c5 Nc8 23. Ra6 Qc7 24. Rc6 Qd7 25. Bb2 b4 26. Qd4 f6 27. d6 e6 28. Rc7 Qd8 29. h3 h4 30. Be4 Rf7 31. Rxf7 Kxf7 32. Bxf5 gxf5 33. c6 Qb6 34. d7 1-0

[Event "Leiden Noteboom Memorial 79th"]
[Site "Leiden"]
[Date "2019.02.22"]
[Round "1"]
[White "Nikolic, Predrag"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "D15"]
[WhiteElo "2573"]
[BlackElo "2081"]
[PlyCount "55"]
[EventDate "2019.02.22"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 dxc4 5. e3 b5 6. a4 b4 7. Nb1 Ba6 8. Be2 c5 9. 0-0 e6 10. Nbd2 c3 11. bxc3 bxc3 12. Nb1 Qa5 13. Ba3 Bxe2 14. Qxe2 Nbd7 15. Rc1 cxd4 16. Bxf8 Kxf8 17. Nxd4 g6 18. Nxc3 Kg7 19. Ncb5 Rhc8 20. Nc6 Qa6 21. Qf3 Nb6 22. Nd6 Rc7 23. Ne5 Qxa4 24. Nexf7 Rf8 25. Ng5 Rxc1+ 26. Rxc1 Qd7 27. Rc7 Qxc7 28. Nxe6+ 1-0

[Event "Leiden Noteboom Memorial 75th"]
[Site "Leiden"]
[Date "2015.02.15"]
[Round "5"]
[White "Otten, Martijn"]
[Black "Guliyev, Namig"]
[Result "0-1"]
[ECO "D20"]
[WhiteElo "2046"]
[BlackElo "2536"]
[PlyCount "76"]
[EventDate "2015.02.13"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 164 Extra"]
[Source "ChessBase"]
[SourceDate "2015.03.02"]
[SourceVersion "1"]
[SourceVersionDate "2015.03.02"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. e4 b5 4. a4 c6 5. axb5 cxb5 6. Nc3 Bd7 7. Nf3 e6 8. Be2 Bb4 9. 0-0 Ne7 10. Qc2 0-0 11. Bf4 a5 12. Rfd1 Ng6 13. Bg3 Re8 14. h4 Na6 15. h5 Nf8 16. Ne5 f6 17. Nxd7 Qxd7 18. e5 Bxc3 19. Qxc3 Nb4 20. h6 Nd5 21. Qd2 f5 22. hxg7 Ng6 23. Rxa5 c3 24. Bxb5 Qxb5 25. Rxb5 cxd2 26. f3 f4 27. Bf2 Ne3 28. Rxd2 Ra1+ 29. Be1 Rxe1+ 30. Kf2 Rf1+ 31. Ke2 Rg1 32. g4 fxg3 33. Kxe3 Re1+ 34. Re2 Rxe2+ 35. Kxe2 Nf4+ 36. Ke3 g2 37. Kf2 Rc8 38. Rc5 Nd3+ 0-1

[Event "Leiden Noteboom Memorial 75th"]
[Site "Leiden"]
[Date "2015.02.15"]
[Round "6"]
[White "Van Haastert, Edwin"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "C16"]
[WhiteElo "2430"]
[BlackElo "2046"]
[PlyCount "73"]
[EventDate "2015.02.13"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 164 Extra"]
[Source "ChessBase"]
[SourceDate "2015.03.02"]
[SourceVersion "1"]
[SourceVersionDate "2015.03.02"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 b6 5. a3 Bf8 6. Bb5+ c6 7. Ba4 Bd7 8. Nce2 c5 9. Bb3 Bb5 10. c3 Ne7 11. h4 h6 12. Nf3 Nec6 13. Bc2 Nd7 14. Rh3 Rc8 15. Nf4 Qc7 16. Bd3 Bxd3 17. Nxd3 b5 18. Be3 Na5 19. dxc5 Nc4 20. b4 Ndxe5 21. Nfxe5 Nxe5 22. a4 Nc4 23. axb5 Nxe3 24. Rxe3 Be7 25. Qa4 0-0 26. Qxa7 Qh2 27. g3 Bf6 28. Ne5 Ra8 29. Qxa8 Rxa8 30. Rxa8+ Kh7 31. c6 d4 32. cxd4 Qh1+ 33. Kd2 Be7 34. Nd3 Bd6 35. Ra2 Qd5 36. Rc2 Bc7 37. b6 1-0

[Event "Leiden Noteboom Memorial 75th"]
[Site "Leiden"]
[Date "2015.02.14"]
[Round "3"]
[White "Otten, Martijn"]
[Black "Lommen, Frank"]
[Result "1-0"]
[ECO "A41"]
[WhiteElo "2046"]
[BlackElo "2087"]
[PlyCount "59"]
[EventDate "2015.02.13"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 164 Extra"]
[Source "ChessBase"]
[SourceDate "2015.03.02"]
[SourceVersion "1"]
[SourceVersionDate "2015.03.02"]
[SourceQuality "1"]

1. d4 d6 2. c4 e5 3. d5 f5 4. Nc3 Nf6 5. e3 g6 6. Nf3 Bg7 7. Be2 a5 8. a3 Nbd7 9. Rb1 Nc5 10. b4 axb4 11. axb4 Nce4 12. Nxe4 Nxe4 13. Bb2 0-0 14. 0-0 f4 15. exf4 Rxf4 16. Qc2 Bf5 17. Bd3 Rxf3 18. gxf3 Qg5+ 19. Kh1 Qh5 20. Bxe4 Rf8 21. Rg1 Bh6 22. Bc1 Bf4 23. Bxf4 Bxe4 24. Qxe4 Rxf4 25. Qe2 Rh4 26. Rg2 e4 27. Rb3 Qe5 28. fxe4 Qa1+ 29. Rg1 Qe5 30. f3 1-0

[Event "Leiden Noteboom Memorial 75th"]
[Site "Leiden"]
[Date "2015.02.14"]
[Round "4"]
[White "Warmerdam, Max"]
[Black "Otten, Martijn"]
[Result "0-1"]
[ECO "C16"]
[WhiteElo "2230"]
[BlackElo "2046"]
[PlyCount "94"]
[EventDate "2015.02.13"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 164 Extra"]
[Source "ChessBase"]
[SourceDate "2015.03.02"]
[SourceVersion "1"]
[SourceVersionDate "2015.03.02"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 b6 5. a3 Bf8 6. f4 Nh6 7. Nf3 Qd7 8. Be3 Be7 9. Bb5 c6 10. Ba4 a5 11. Ne2 Ba6 12. Qd2 0-0 13. c3 Bc4 14. h3 Nf5 15. Bf2 Qd8 16. Bc2 c5 17. Rg1 Nc6 18. g4 Nh4 19. Nh2 cxd4 20. cxd4 Rc8 21. Kd1 Ng6 22. Be3 Bxe2+ 23. Kxe2 Nxf4+ 24. Bxf4 Nxd4+ 25. Qxd4 Rxc2+ 26. Bd2 Bc5 27. Qd3 Bxg1 28. Rxg1 Qc7 29. Nf3 Rxb2 30. Ke3 Qc4 31. Qxc4 dxc4 32. Rc1 Rb3+ 33. Rc3 Rxc3+ 34. Bxc3 Rd8 35. Nd4 Rd5 36. Ke4 Kf8 37. g5 Ke7 38. Nc6+ Kd7 39. Nd4 Rc5 40. a4 h6 41. gxh6 gxh6 42. Nb5 Rd5 43. Bd4 Kc6 44. Nd6 f5+ 45. Ke3 c3 46. Bxc3 Rd1 47. Kf4 Rd3 0-1

[Event "Roosendaal LBV op-A"]
[Site "Roosendaal"]
[Date "2012.08.19"]
[Round "6"]
[White "Eerens, Pim"]
[Black "Otten, Martijn"]
[Result "0-1"]
[ECO "D30"]
[WhiteElo "2180"]
[BlackElo "2015"]
[PlyCount "64"]
[EventDate "2012.08.16"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 150 Extra"]
[Source "ChessBase"]
[SourceDate "2012.10.19"]
[SourceVersion "1"]
[SourceVersionDate "2012.10.19"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. e3 c6 4. c4 e6 5. Nbd2 Nbd7 6. b3 Bb4 7. Bd3 0-0 8. 0-0 Re8 9. Bb2 Bd6 10. Ne5 Qc7 11. f4 c5 12. g4 Nf8 13. g5 N6d7 14. Qh5 Bxe5 15. fxe5 Re7 16. Rf3 Ng6 17. Raf1 b6 18. Bxg6 fxg6 19. Qh4 Bb7 20. cxd5 Bxd5 21. e4 Bb7 22. Nc4 Rf8 23. Rxf8+ Nxf8 24. Rxf8+ Kxf8 25. Qxh7 Ke8 26. Nd6+ Kd7 27. Qxg6 cxd4 28. Nxb7 Qc2 29. Ba3 d3 30. Bb4 a5 31. Be1 Qd1 32. Kf2 Qe2+ 0-1

[Event "Roosendaal LBV op-A"]
[Site "Roosendaal"]
[Date "2012.08.18"]
[Round "4"]
[White "Bosboom, Manuel"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "A11"]
[WhiteElo "2383"]
[BlackElo "2015"]
[PlyCount "57"]
[EventDate "2012.08.16"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 150 Extra"]
[Source "ChessBase"]
[SourceDate "2012.10.19"]
[SourceVersion "1"]
[SourceVersionDate "2012.10.19"]
[SourceQuality "1"]

1. c4 c6 2. Nf3 d5 3. e3 Nf6 4. Nc3 g6 5. b3 Bg7 6. Bb2 0-0 7. Qc2 Nbd7 8. Rc1 e5 9. cxd5 cxd5 10. Nb5 Ne8 11. Ba3 a6 12. Nc3 d4 13. Ne4 b5 14. exd4 exd4 15. Bd3 Bb7 16. 0-0 f5 17. Neg5 Rf6 18. Rfe1 Rc6 19. Bxf5 Nc7 20. Be7 Rxc2 21. Bxd8 Rxc1 22. Rxc1 Rxd8 23. Rxc7 gxf5 24. Rxb7 Nc5 25. Rc7 Rd5 26. b4 h6 27. Rxc5 Rxc5 28. bxc5 hxg5 29. c6 1-0

[Event "Roosendaal LBV op-A"]
[Site "Roosendaal"]
[Date "2012.08.18"]
[Round "5"]
[White "Otten, Martijn"]
[Black "Smits, Mark"]
[Result "0-1"]
[ECO "E24"]
[WhiteElo "2015"]
[BlackElo "2206"]
[PlyCount "98"]
[EventDate "2012.08.16"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 150 Extra"]
[Source "ChessBase"]
[SourceDate "2012.10.19"]
[SourceVersion "1"]
[SourceVersionDate "2012.10.19"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 d6 6. f3 e5 7. Bg5 h6 8. Bh4 c5 9. e3 Nc6 10. Ne2 b6 11. Nc1 Qe7 12. Be2 0-0 13. Bf2 Na5 14. Nb3 Nxb3 15. Qxb3 exd4 16. cxd4 cxd4 17. exd4 d5 18. Be3 Ba6 19. Kf2 Rac8 20. Rac1 Bxc4 21. Bxc4 dxc4 22. Rxc4 Rxc4 23. Qxc4 Qxa3 24. Rd1 Qd6 25. g3 Nd5 26. Bd2 Qd7 27. Rc1 Rd8 28. Kg2 Ne7 29. Be3 Rc8 30. Qf1 Rxc1 31. Qxc1 Qc6 32. Kf2 Qxc1 33. Bxc1 Nd5 34. Ba3 b5 35. Bc5 a5 36. Ke2 f5 37. g4 g6 38. h4 h5 39. gxf5 gxf5 40. Bd6 Kf7 41. Kd3 Ke6 42. Bg3 Kd7 43. Be1 a4 44. Bd2 Kc6 45. Bh6 b4 46. Kc4 b3 47. Bc1 Nb6+ 48. Kb4 Kd5 49. Kc3 Nc4 0-1

[Event "Roosendaal LBV op-A"]
[Site "Roosendaal"]
[Date "2012.08.17"]
[Round "3"]
[White "Otten, Martijn"]
[Black "L'Ami, Erwin"]
[Result "1/2-1/2"]
[ECO "E79"]
[WhiteElo "2015"]
[BlackElo "2628"]
[PlyCount "78"]
[EventDate "2012.08.16"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 150 Extra"]
[Source "ChessBase"]
[SourceDate "2012.10.19"]
[SourceVersion "1"]
[SourceVersionDate "2012.10.19"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. f4 c5 7. Nf3 cxd4 8. Nxd4 Nc6 9. Be3 Bg4 10. Nxc6 Bxe2 11. Nxd8 Bxd1 12. Rxd1 Rfxd8 13. Ke2 a6 14. c5 Ng4 15. cxd6 Nxe3 16. Kxe3 Bxc3 17. bxc3 exd6 18. Rd4 Rac8 19. Kd3 Rc6 20. Rb1 Rd7 21. a4 Kf8 22. Rdb4 Rcc7 23. Kd4 f5 24. exf5 gxf5 25. Rb6 Ke7 26. c4 Kd8 27. g3 Kc8 28. Re1 Rc5 29. Rxd6 Rxc4+ 30. Kxc4 Rxd6 31. Re7 Rh6 32. Rf7 Rxh2 33. Rxf5 Rc2+ 34. Kb3 Rg2 35. Rg5 Kc7 36. Kc4 Kc6 37. Rc5+ Kd6 38. Rh5 Rxg3 39. Rxh7 Rf3 1/2-1/2

[Event "Borne Euro Chess op-A"]
[Site "Borne"]
[Date "2011.08.05"]
[Round "7"]
[White "Hummel, Thomas"]
[Black "Otten, Martijn"]
[Result "0-1"]
[ECO "D10"]
[BlackElo "1956"]
[PlyCount "38"]
[EventDate "2011.08.01"]
[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 c6 2. Nc3 d5 3. cxd5 cxd5 4. d4 Nf6 5. g3 Bf5 6. Bg2 e6 7. Qb3 Nc6 8. Bf4 Nxd4 9. Qxb7 Bc5 10. e4 dxe4 11. Nxe4 0-0 12. Nxc5 Nc2+ 13. Ke2 Nxa1 14. Nf3 Rc8 15. Rxa1 Rxc5 16. Qxa7 Qd3+ 17. Ke1 Rc2 18. Nd4 Rxb2 19. a4 e5 0-1

[Event "Borne Euro Chess op-A"]
[Site "Borne"]
[Date "2011.08.05"]
[Round "8"]
[White "Otten, Martijn"]
[Black "Rauw, Gert Jan"]
[Result "0-1"]
[ECO "E24"]
[WhiteElo "1956"]
[BlackElo "2089"]
[PlyCount "50"]
[EventDate "2011.08.01"]
[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 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 b6 6. f3 Nc6 7. e4 Ba6 8. Bg5 Na5 9. e5 h6 10. Bh4 g5 11. Bf2 Nh5 12. h4 f5 13. d5 Qe7 14. hxg5 Qxg5 15. Qa4 Ng3 16. dxe6 0-0-0 17. f4 Qxf4 18. Ne2 Nxe2 19. Bxe2 Qe4 20. Bh4 Bxc4 21. 0-0 Qxh4 22. e7 Qxe7 23. Rxf5 Bxe2 24. Qe4 Qc5+ 25. Kh1 Kb8 0-1

[Event "Borne Euro Chess op-A"]
[Site "Borne"]
[Date "2011.08.04"]
[Round "6"]
[White "Otten, Martijn"]
[Black "Mostertman, Milan"]
[Result "0-1"]
[ECO "E24"]
[WhiteElo "1956"]
[BlackElo "2232"]
[PlyCount "66"]
[EventDate "2011.08.01"]
[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 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 b6 6. f3 Nc6 7. e4 d6 8. Bg5 h6 9. Bh4 Ne7 10. Ne2 Ng6 11. Bf2 c5 12. Qd2 Ba6 13. Nf4 Ne7 14. Rc1 Nc6 15. Bd3 Na5 16. Qa2 Qd7 17. a4 cxd4 18. cxd4 g5 19. c5 Bxd3 20. Nxd3 dxc5 21. dxc5 Qxd3 22. Qb2 Rd8 23. cxb6 0-0 24. bxa7 Nb3 25. a8Q Nxc1 26. Qxd8 Rxd8 27. Qxc1 Rb8 28. Bb6 Rxb6 29. Kf2 Qd4+ 30. Kg3 Nxe4+ 31. fxe4 Rb3+ 32. Kg4 Qxe4+ 33. Kh5 Qg6+ 0-1

[Event "Borne Euro Chess op-A"]
[Site "Borne"]
[Date "2011.08.03"]
[Round "5"]
[White "Otten, Martijn"]
[Black "Zwirs, Nico"]
[Result "0-1"]
[ECO "E76"]
[WhiteElo "1956"]
[BlackElo "2125"]
[PlyCount "90"]
[EventDate "2011.08.01"]
[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. Be2 0-0 6. f4 Na6 7. Nf3 c5 8. Be3 cxd4 9. Nxd4 Nc5 10. Bf3 Bh6 11. Qd2 e5 12. Ndb5 exf4 13. Bg1 Ng4 14. Qxd6 Nd3+ 15. Ke2 Qxd6 16. Nxd6 Nge5 17. Nd5 Be6 18. b3 b6 19. Rd1 Nc5 20. Bd4 Bg7 21. Nxf4 Bd7 22. h4 Ne6 23. Nxe6 Bxe6 24. Nb5 Rad8 25. Nc7 Rxd4 26. Rxd4 Nxf3 27. Rd6 Nd4+ 28. Ke3 Be5 29. Nxe6 Nxe6 30. Rd7 a5 31. g4 Rc8 32. Rf1 Rf8 33. Rf3 h6 34. Rd5 Bb2 35. Rd6 Ba3 36. Rd5 Bc5+ 37. Kd3 Be7 38. h5 g5 39. Kd2 Bb4+ 40. Kc2 Re8 41. Rff5 Re7 42. e5 Bc5 43. Kc3 Kg7 44. Rd1 Nf4 45. Re1 Bb4+ 0-1

[Event "Borne Euro Chess op-A"]
[Site "Borne"]
[Date "2011.08.02"]
[Round "2"]
[White "Haast, Mark"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "D11"]
[WhiteElo "2248"]
[BlackElo "1956"]
[PlyCount "75"]
[EventDate "2011.08.01"]
[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 c6 3. g3 d5 4. d4 Bf5 5. Nc3 Nbd7 6. Bg2 e6 7. 0-0 Be7 8. Nd2 0-0 9. e4 dxe4 10. Ndxe4 Nb6 11. b3 Kh8 12. Bf4 Bg6 13. Bf3 Nbd7 14. Qe2 Qa5 15. a3 Bh5 16. b4 Bxf3 17. Qxf3 Qf5 18. Qe2 e5 19. dxe5 Nxe5 20. Rae1 Rae8 21. c5 Nxe4 22. Nxe4 g5 23. Bxe5+ Qxe5 24. Qh5 Qg7 25. Re3 Rd8 26. Rfe1 f5 27. Nd6 Bxd6 28. cxd6 Rxd6 29. Re7 Qg8 30. Rxb7 f4 31. Ree7 h6 32. Rbd7 fxg3 33. Rxd6 gxf2+ 34. Kf1 Qc4+ 35. Qe2 Qc1+ 36. Rd1 Qxa3 37. Qe5+ Kg8 38. Qg7# 1-0

[Event "Borne Euro Chess op-A"]
[Site "Borne"]
[Date "2011.08.02"]
[Round "3"]
[White "Otten, Martijn"]
[Black "Van der Werff, Frank"]
[Result "1-0"]
[ECO "A80"]
[WhiteElo "1956"]
[BlackElo "1875"]
[PlyCount "96"]
[EventDate "2011.08.01"]
[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 f5 2. Bg5 h6 3. Bh4 g5 4. e4 Rh7 5. Bc4 e6 6. Qh5+ Rf7 7. Nf3 gxh4 8. Ne5 Qf6 9. Qxf7+ Qxf7 10. Nxf7 Kxf7 11. exf5 d5 12. fxe6+ Bxe6 13. Bd3 Nc6 14. c3 Re8 15. Kd1 Bd6 16. Nd2 h3 17. g3 Nf6 18. f3 Ne7 19. Kc2 Nf5 20. Rae1 b6 21. Rxe6 Kxe6 22. Re1+ Kf7 23. Rxe8 Nxd4+ 24. cxd4 Kxe8 25. Bf5 Kf7 26. Bxh3 h5 27. Bf5 h4 28. f4 Nh5 29. Nf1 c5 30. Kd3 Nf6 31. Ke3 hxg3 32. hxg3 Ne8 33. Nd2 Nc7 34. Nb3 Na6 35. g4 Nc7 36. Bd7 Ke7 37. Bc8 Nb5 38. a4 Nxd4 39. Nxd4 cxd4+ 40. Kxd4 Bxf4 41. Kxd5 Kd8 42. Ba6 Kc7 43. b3 Bd2 44. Ke6 Kc6 45. Bb5+ Kc7 46. Kf6 Kd6 47. g5 Bc3+ 48. Kf7 Kd5 1-0

[Event "Borne Euro Chess op-A"]
[Site "Borne"]
[Date "2011.08.01"]
[Round "1"]
[White "Rijksen, Arnold"]
[Black "Otten, Martijn"]
[Result "0-1"]
[ECO "C01"]
[BlackElo "1956"]
[PlyCount "38"]
[EventDate "2011.08.01"]
[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. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Nc6 5. Bb5 Bd6 6. 0-0 Nge7 7. Ne5 0-0 8. Nxc6 bxc6 9. Bd3 Bf5 10. Nd2 Bxd3 11. cxd3 Nf5 12. Qg4 Qf6 13. Nf3 h6 14. Re1 Rfe8 15. Bd2 Rxe1+ 16. Rxe1 Rb8 17. Bc3 Bb4 18. Re5 Bxc3 19. bxc3 Qxe5 0-1

[Event "NED-ch U21"]
[Site "Haarlem"]
[Date "2011.05.08"]
[Round "9"]
[White "Otten, Martijn"]
[Black "Le Clercq, Maxim"]
[Result "1-0"]
[ECO "A80"]
[WhiteElo "1959"]
[BlackElo "1846"]
[PlyCount "57"]
[EventDate "2011.04.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 142 Extra"]
[Source "ChessBase"]
[SourceDate "2011.06.27"]
[SourceVersion "1"]
[SourceVersionDate "2011.06.27"]
[SourceQuality "1"]

1. d4 f5 2. Bg5 Nf6 3. Bxf6 exf6 4. e3 d5 5. Bd3 Bd6 6. Qf3 g6 7. h4 h5 8. Nc3 c6 9. Nge2 Kf7 10. g3 Na6 11. a3 Nc7 12. Nf4 Qe7 13. Nce2 b5 14. Qg2 a5 15. g4 hxg4 16. h5 gxh5 17. Nxh5 Be6 18. Kd2 Rag8 19. Nhf4 Ne8 20. Rxh8 Rxh8 21. Rh1 Rxh1 22. Qxh1 Ng7 23. Qh7 a4 24. Nh5 Qf8 25. Nef4 Bxf4 26. Nxf4 Qe7 27. c3 Bd7 28. Ng6 Bc8 29. Nxe7 1-0

[Event "NED-ch U21"]
[Site "Haarlem"]
[Date "2011.05.07"]
[Round "8"]
[White "Colijn, Erik Jan"]
[Black "Otten, Martijn"]
[Result "1/2-1/2"]
[ECO "C04"]
[WhiteElo "1982"]
[BlackElo "1959"]
[PlyCount "39"]
[EventDate "2011.04.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 142 Extra"]
[Source "ChessBase"]
[SourceDate "2011.06.27"]
[SourceVersion "1"]
[SourceVersionDate "2011.06.27"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. Ngf3 Nf6 5. e5 Nd7 6. Be2 f6 7. exf6 gxf6 8. Nf1 Bg7 9. Ne3 0-0 10. h4 Nb6 11. h5 e5 12. h6 Bh8 13. Rh5 e4 14. Nh4 Kf7 15. Nhf5 Rg8 16. c4 Be6 17. c5 Nc8 18. Bg4 Qd7 19. Bh3 N8e7 20. a3 1/2-1/2

[Event "NED-ch U21"]
[Site "Haarlem"]
[Date "2011.05.06"]
[Round "7"]
[White "Otten, Martijn"]
[Black "Nicolai, Amir"]
[Result "0-1"]
[ECO "B38"]
[WhiteElo "1959"]
[BlackElo "1931"]
[PlyCount "86"]
[EventDate "2011.04.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 142 Extra"]
[Source "ChessBase"]
[SourceDate "2011.06.27"]
[SourceVersion "1"]
[SourceVersionDate "2011.06.27"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. f4 c5 7. Nf3 cxd4 8. Nxd4 Nc6 9. Be3 Bd7 10. 0-0 Nxd4 11. Bxd4 Bc6 12. Bf3 Qa5 13. f5 Rad8 14. g4 gxf5 15. exf5 e5 16. Bf2 e4 17. Bg2 Rfe8 18. Bd4 e3 19. g5 Ne4 20. Bxg7 Kxg7 21. Qh5 Qe5 22. Nxe4 Bxe4 23. Bxe4 Qxe4 24. Rf3 e2 25. Re1 Qd4+ 26. Kg2 Re4 27. Qh6+ Kh8 28. g6 Qg7 29. Rh3 fxg6 30. fxg6 Rg4+ 31. Kf3 Rf8+ 32. Kxg4 Qd4+ 33. Kg3 Qf2+ 34. Kg4 Qf5+ 35. Kg3 Qf3+ 36. Kh4 Qe4+ 37. Kg3 Rf3+ 38. Kg2 Rf4+ 39. Kg1 Qd4+ 40. Re3 Qxe3+ 41. Kg2 Rf2+ 42. Kg1 Rf1+ 43. Kg2 Qf3# 0-1

[Event "NED-ch U21"]
[Site "Haarlem"]
[Date "2011.05.05"]
[Round "6"]
[White "Otten, Martijn"]
[Black "Von Meijenfeldt, Bart"]
[Result "1/2-1/2"]
[ECO "B38"]
[WhiteElo "1959"]
[BlackElo "2154"]
[PlyCount "111"]
[EventDate "2011.04.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 142 Extra"]
[Source "ChessBase"]
[SourceDate "2011.06.27"]
[SourceVersion "1"]
[SourceVersionDate "2011.06.27"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. f4 c5 7. Nf3 cxd4 8. Nxd4 Nc6 9. Be3 Bd7 10. 0-0 Nxd4 11. Bxd4 Bc6 12. Bf3 Nd7 13. Bxg7 Kxg7 14. Kh1 Qb6 15. b3 Qe3 16. Nd5 Bxd5 17. exd5 Nf6 18. f5 Qg5 19. Be2 gxf5 20. Rf3 Kh8 21. Qd4 Rg8 22. Rg1 Rg7 23. Bd3 Ng4 24. Bxf5 Ne5 25. Rf2 a6 26. Qf4 Qh5 27. g4 Rag8 28. Rfg2 Qh4 29. c5 Rg5 30. Qe4 h5 31. c6 bxc6 32. dxc6 e6 33. gxh5 Rxg2 34. Rxg2 Qxh5 35. Rxg8+ Kxg8 36. Qg2+ Kf8 37. Bg4 Qg5 38. Bd1 Qc1 39. Qc2 Qxc2 40. Bxc2 Nxc6 41. Kg2 f5 42. a3 a5 43. Kf2 Ke7 44. Bd3 d5 45. Ke3 e5 46. Bxf5 Nd4 47. Bh7 Nxb3 48. Bg8 d4+ 49. Ke4 Nc5+ 50. Kxe5 d3 51. Bh7 d2 52. Bc2 Nd3+ 53. Kd4 Nb2 54. a4 d1Q+ 55. Bxd1 Nxd1 56. Kc5 1/2-1/2

[Event "NED-ch U21"]
[Site "Haarlem"]
[Date "2011.05.04"]
[Round "5"]
[White "Manoch, Maurice"]
[Black "Otten, Martijn"]
[Result "0-1"]
[ECO "C16"]
[WhiteElo "1769"]
[BlackElo "1959"]
[PlyCount "86"]
[EventDate "2011.04.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 142 Extra"]
[Source "ChessBase"]
[SourceDate "2011.06.27"]
[SourceVersion "1"]
[SourceVersionDate "2011.06.27"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 b6 5. Qg4 Bf8 6. Bg5 Qd7 7. Bb5 Nc6 8. 0-0-0 Bb7 9. Nh3 h6 10. Qh5 Nge7 11. Bxe7 Bxe7 12. f4 g6 13. Qf3 0-0-0 14. a3 f6 15. exf6 Bxf6 16. Nf2 Qg7 17. Bxc6 Bxc6 18. Ng4 Bxd4 19. Rxd4 Qxd4 20. Ne5 Be8 21. Rd1 Qc5 22. Ne2 Rf8 23. Nd4 Qd6 24. Qg4 Bd7 25. Qxg6 c5 26. Nxd7 Kxd7 27. Qg7+ Kc8 28. Ne2 Rg8 29. Qxh6 Rxg2 30. Ng3 Rf2 31. Kb1 Rxf4 32. Re1 Re8 33. Nh5 Rh4 34. Qg6 Re7 35. Rf1 Rxh2 36. Rf8+ Kb7 37. Ng7 d4 38. Rf1 d3 39. c3 Qd7 40. Nh5 d2 41. Rd1 Qd5 42. Ng3 Rg2 43. Qf6 Rd7 0-1

[Event "NED-ch U21"]
[Site "Haarlem"]
[Date "2011.05.03"]
[Round "4"]
[White "Otten, Martijn"]
[Black "Van Ee, Robin"]
[Result "1-0"]
[ECO "E27"]
[WhiteElo "1959"]
[PlyCount "79"]
[EventDate "2011.04.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 142 Extra"]
[Source "ChessBase"]
[SourceDate "2011.06.27"]
[SourceVersion "1"]
[SourceVersionDate "2011.06.27"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 0-0 6. f3 d6 7. e4 e5 8. Bd3 Nc6 9. Ne2 Ne7 10. 0-0 Ng6 11. Qe1 Nh5 12. Be3 Ngf4 13. Bc2 Qg5 14. Ng3 f5 15. Ra2 Nh3+ 16. Kh1 f4 17. Nxh5 Qxh5 18. Bc1 Ng5 19. Bd1 Rf6 20. c5 Be6 21. d5 Bd7 22. Rb2 b6 23. c6 Bc8 24. c4 Ba6 25. g4 Qh3 26. Rc2 Raf8 27. Qf2 Rh6 28. Rg1 Bc8 29. Be2 Rff6 30. Bd2 Rh4 31. Be1 Rfh6 32. Bd1 Bxg4 33. Rxg4 Rxg4 34. fxg4 Nxe4 35. Qf3 Ng3+ 36. Kg1 e4 37. Qg2 Qh4 38. hxg3 Qf6 39. Qxe4 Qf7 40. gxf4 1-0

[Event "NED-ch U21"]
[Site "Haarlem"]
[Date "2011.05.02"]
[Round "3"]
[White "Donkers, Joran"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "C04"]
[BlackElo "1959"]
[PlyCount "71"]
[EventDate "2011.04.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 142 Extra"]
[Source "ChessBase"]
[SourceDate "2011.06.27"]
[SourceVersion "1"]
[SourceVersionDate "2011.06.27"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. Ngf3 Nf6 5. e5 Nd7 6. c3 f6 7. exf6 Qxf6 8. Bb5 Bd6 9. 0-0 0-0 10. Qe2 a6 11. Bxc6 bxc6 12. Re1 Nb6 13. Ne5 Bxe5 14. dxe5 Qg6 15. Nb3 Nd7 16. f4 c5 17. Be3 c4 18. Nd2 Bb7 19. Rf1 a5 20. Rf3 a4 21. Rg3 Qf7 22. Nf3 a3 23. bxa3 Rxa3 24. Qb2 Qe7 25. Qxb7 Rxc3 26. Bd2 Qc5+ 27. Kh1 Rb8 28. Qa6 Rxf3 29. Rxf3 Rb6 30. Qc8+ Nf8 31. a3 c3 32. Bxc3 Qxa3 33. Raf1 Rc6 34. Bd2 Qb2 35. Be1 d4 36. f5 1-0

[Event "NED-ch U21"]
[Site "Haarlem"]
[Date "2011.05.01"]
[Round "2"]
[White "Brookes, Christopher"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "C16"]
[WhiteElo "2048"]
[BlackElo "1959"]
[PlyCount "85"]
[EventDate "2011.04.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 142 Extra"]
[Source "ChessBase"]
[SourceDate "2011.06.27"]
[SourceVersion "1"]
[SourceVersionDate "2011.06.27"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 b6 5. Qg4 Bf8 6. Bb5+ c6 7. Ba4 Ba6 8. Nce2 Bb5 9. Bxb5 cxb5 10. Nh3 Qd7 11. Nhf4 Nh6 12. Qh3 Nc6 13. c3 0-0-0 14. 0-0 g6 15. b4 Kb7 16. Qd3 a6 17. Be3 Nf5 18. Rfb1 h5 19. a4 Na7 20. axb5 axb5 21. Qc2 Ra8 22. Qa2 Kb8 23. Rb3 Ne7 24. Ra3 Nec6 25. Ra6 Qb7 26. Nd3 Be7 27. Ra3 Rc8 28. Kf1 Rc7 29. Qd2 Qc8 30. Bh6 Qd7 31. Qf4 Bd8 32. Ng1 Rb7 33. h4 Qc7 34. Nh3 Kc8 35. Ke2 Qd7 36. f3 Kc7 37. g4 hxg4 38. fxg4 Rab8 39. Bg7 Qe8 40. h5 gxh5 41. gxh5 Nc8 42. Rf1 f6 43. exf6+ 1-0

[Event "NED-ch U21"]
[Site "Haarlem"]
[Date "2011.04.30"]
[Round "1"]
[White "Otten, Martijn"]
[Black "Law, Nicky"]
[Result "0-1"]
[ECO "D47"]
[WhiteElo "1959"]
[BlackElo "2178"]
[PlyCount "92"]
[EventDate "2011.04.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 142 Extra"]
[Source "ChessBase"]
[SourceDate "2011.06.27"]
[SourceVersion "1"]
[SourceVersionDate "2011.06.27"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Nc3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7 9. e4 b4 10. Na4 c5 11. e5 Nd5 12. 0-0 cxd4 13. Nxd4 Be7 14. Qh5 g6 15. Qe2 Qa5 16. b3 Rc8 17. Kh1 Rxc1 18. Raxc1 Nf4 19. Qd2 Qd5 20. Be4 Qxe4 21. f3 Qxe5 22. Rfe1 Qg5 23. Rc7 Bd5 24. g3 Nh3 25. Qxg5 Nxg5 26. Kg2 Bf6 27. Rc8+ Ke7 28. Rxh8 Bxh8 29. Ne2 Nxf3 30. Rc1 Nd4+ 31. Kf2 Nxe2 32. Kxe2 Kd6 33. Rc2 f5 34. Nb2 Bxb2 35. Rxb2 g5 36. Ke3 e5 37. Rf2 f4+ 38. Ke2 Nc5 39. gxf4 gxf4 40. Rf1 Ne4 41. Rg1 Nc3+ 42. Ke1 Nxa2 43. Rg7 a5 44. Rxh7 a4 45. bxa4 b3 46. Rh8 Nb4 0-1

[Event "Leiden Noteboom Memorial 71st"]
[Site "Leiden"]
[Date "2011.03.04"]
[Round "1"]
[White "Ikonnikov, Vyacheslav"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "D44"]
[WhiteElo "2569"]
[BlackElo "1959"]
[PlyCount "61"]
[EventDate "2011.03.04"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 141 Extra"]
[Source "ChessBase"]
[SourceDate "2011.05.03"]
[SourceVersion "1"]
[SourceVersionDate "2011.05.03"]
[SourceQuality "1"]

1. d4 e6 2. c4 d5 3. Nf3 Nf6 4. Nc3 c6 5. Bg5 dxc4 6. a4 h6 7. Bxf6 Qxf6 8. e4 Bb4 9. Bxc4 Qg6 10. e5 b6 11. 0-0 Ba6 12. Qe2 Bxc4 13. Qxc4 Bxc3 14. Qxc3 Qe4 15. Nd2 Qd5 16. Nc4 0-0 17. b4 Rc8 18. Nd6 Rc7 19. a5 Na6 20. axb6 axb6 21. Ra3 c5 22. dxc5 Nb8 23. Rxa8 Qxa8 24. Ra1 Qc6 25. h4 Nd7 26. Qg3 Kf8 27. Qf4 f6 28. b5 Qd5 29. exf6 Nxc5 30. fxg7+ Kxg7 31. Ne8+ 1-0

[Event "NED-ch op U18"]
[Site "Enschede"]
[Date "2010.08.13"]
[Round "8"]
[White "Otten, Martijn"]
[Black "Heller, Milan"]
[Result "1/2-1/2"]
[ECO "A40"]
[WhiteElo "1861"]
[BlackElo "1959"]
[PlyCount "30"]
[EventDate "2010.08.09"]
[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. d4 e6 2. c4 b6 3. a3 Bb7 4. Nc3 Nf6 5. Bg5 Be7 6. Qc2 d5 7. e3 Nbd7 8. b4 dxc4 9. f3 0-0 10. Bxc4 c5 11. Nge2 cxd4 12. Nxd4 Nd5 13. Bxe7 Qxe7 14. Bxd5 exd5 15. Kf2 Rac8 1/2-1/2

[Event "NED-ch op U18"]
[Site "Enschede"]
[Date "2010.08.12"]
[Round "6"]
[White "Otten, Martijn"]
[Black "Beerdsen, Thomas"]
[Result "1/2-1/2"]
[ECO "D43"]
[WhiteElo "1861"]
[BlackElo "1976"]
[PlyCount "101"]
[EventDate "2010.08.09"]
[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. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. Bg5 h6 6. Bxf6 Qxf6 7. Qb3 Nd7 8. 0-0-0 dxc4 9. Qxc4 Be7 10. e4 0-0 11. e5 Qf4+ 12. Kb1 a5 13. Bd3 a4 14. Ne2 Qg4 15. Ng3 h5 16. Qc1 f5 17. exf6 Rxf6 18. h3 Qf4 19. Qxf4 Rxf4 20. Nxh5 Rf8 21. Rhe1 Nb6 22. a3 Nd5 23. Rd2 c5 24. Bc4 Nc7 25. d5 b5 26. Ba2 Rd8 27. dxe6 Rxd2 28. Nxd2 c4 29. Nf4 Bg5 30. Nxc4 bxc4 31. Bxc4 Bxf4 32. e7+ Kh7 33. Bd3+ g6 34. e8Q Nxe8 35. Rxe8 Rb8 36. Re4 Bf5 37. Rxf4 Bxd3+ 38. Kc1 Rc8+ 39. Kd2 Bc2 40. Rd4 Bb3 41. Ke3 Kg7 42. Rd2 Kf6 43. h4 Kf5 44. Kf3 Rc4 45. g3 Re4 46. Rd8 Rc4 47. g4+ Ke6 48. Rd2 Rc2 49. Rxc2 Bxc2 50. Kg3 Bd1 51. f3 1/2-1/2

[Event "NED-ch op U18"]
[Site "Enschede"]
[Date "2010.08.11"]
[Round "5"]
[White "Lardinois, Wouter"]
[Black "Otten, Martijn"]
[Result "0-1"]
[ECO "D10"]
[WhiteElo "1812"]
[BlackElo "1861"]
[PlyCount "32"]
[EventDate "2010.08.09"]
[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. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Bf4 dxc4 5. a4 Nd5 6. Bg3 Nxc3 7. bxc3 b5 8. e4 Bb7 9. f4 Nd7 10. Be2 Nb6 11. a5 Na4 12. Rxa4 bxa4 13. Qxa4 Rb8 14. Bxc4 Ba8 15. d5 Qd7 16. Nf3 cxd5 0-1

[Event "NED-ch op U18"]
[Site "Enschede"]
[Date "2010.08.10"]
[Round "4"]
[White "Otten, Martijn"]
[Black "Leentvaar, Maurits"]
[Result "1-0"]
[ECO "E77"]
[WhiteElo "1861"]
[BlackElo "1481"]
[PlyCount "35"]
[EventDate "2010.08.09"]
[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. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. f4 Nc6 7. d5 Na5 8. Nf3 c5 9. 0-0 e6 10. e5 dxe5 11. fxe5 Ng4 12. Bf4 a6 13. h3 Nh6 14. Bg5 Qb6 15. Be7 Re8 16. Na4 Qc7 17. Bxc5 Bxe5 18. d6 1-0

[Event "NED-ch op U18"]
[Site "Enschede"]
[Date "2010.08.10"]
[Round "3"]
[White "Rauw, Gert Jan"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "B40"]
[WhiteElo "2074"]
[BlackElo "1861"]
[PlyCount "39"]
[EventDate "2010.08.09"]
[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. e4 c5 2. d3 e6 3. Nf3 Nc6 4. Nbd2 Qc7 5. g3 b6 6. Bg2 Bb7 7. 0-0 d6 8. Re1 Nf6 9. Nf1 Be7 10. c3 Nd7 11. Bg5 0-0 12. h4 Rae8 13. N1h2 d5 14. Qe2 d4 15. e5 f6 16. exf6 Bxf6 17. c4 Kh8 18. Ng4 Nd8 19. Nxf6 Nxf6 20. Ne5 1-0

[Event "NED-ch op U18"]
[Site "Enschede"]
[Date "2010.08.09"]
[Round "1"]
[White "Lambrechts, Koen"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "C16"]
[WhiteElo "2156"]
[BlackElo "1861"]
[PlyCount "125"]
[EventDate "2010.08.09"]
[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. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 b6 5. Qg4 Bf8 6. Be3 Ba6 7. Bxa6 Nxa6 8. a3 Qd7 9. Nge2 Ne7 10. Ng3 0-0-0 11. Qe2 Kb7 12. 0-0 f6 13. f4 Qe8 14. b4 h5 15. Rfb1 h4 16. Nf1 h3 17. g3 Qg6 18. b5 Nb8 19. a4 Nf5 20. a5 fxe5 21. fxe5 Rh4 22. axb6 axb6 23. Ra4 Be7 24. Rba1 Kc8 25. Bf2 Rf8 26. Kh1 Qg4 27. Qxg4 Rxg4 28. Bg1 Nh6 29. Ne3 Rg6 30. Ncxd5 exd5 31. Nxd5 Bd8 32. Nf4 Rg4 33. Nxh3 Re4 34. Rc4 Ng4 35. Rc3 Rh8 36. Nf2 Nxf2+ 37. Bxf2 Re2 38. Bg1 Kb7 39. Rf1 Nd7 40. Rf7 Nf8 41. Rc6 Nh7 42. Rf2 Rxf2 43. Bxf2 Rf8 44. Kg2 Ng5 45. Rg6 Ne4 46. Be3 Rf7 47. c4 Be7 48. h4 Bb4 49. Rg4 Nd2 50. d5 Re7 51. e6 Nb3 52. Kf3 Nc5 53. Bxc5 bxc5 54. Ke4 Bc3 55. Kf5 Kb6 56. Kg6 Ka5 57. Rf4 Kb4 58. Rf7 Re8 59. Rxc7 Kxc4 60. Kf7 Rb8 61. e7 Be5 62. Rd7 Bxg3 63. b6 1-0

[Event "Leiden Noteboom Memorial 70th"]
[Site "Leiden"]
[Date "2010.02.14"]
[Round "5"]
[White "Van der Zon, Stef"]
[Black "Otten, Martijn"]
[Result "0-1"]
[ECO "C16"]
[WhiteElo "1691"]
[BlackElo "1874"]
[PlyCount "64"]
[EventDate "2010.02.12"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 134 Extra"]
[Source "ChessBase"]
[SourceDate "2010.03.03"]
[SourceVersion "1"]
[SourceVersionDate "2010.03.03"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 b6 5. a3 Bf8 6. f4 Nh6 7. Nf3 Nc6 8. Bd3 Bb7 9. 0-0 Qd7 10. Be3 Be7 11. Ne2 0-0-0 12. c3 f6 13. a4 Nf7 14. b4 fxe5 15. fxe5 g5 16. Nd2 Nfxe5 17. dxe5 Nxe5 18. Bc2 Ng4 19. Bd4 Rhf8 20. Ng3 h5 21. Qe2 c5 22. bxc5 bxc5 23. Nxh5 cxd4 24. Qxg4 dxc3 25. Nb3 d4 26. Rxf8 Bxf8 27. Re1 d3 28. Qc4+ Qc6 29. Qxc6+ Bxc6 30. Rxe6 Bd5 31. Re3 Bxb3 32. Bxb3 Bc5 0-1

[Event "Enschede op-B U16"]
[Site "Enschede"]
[Date "2009.08.07"]
[Round "8"]
[White "Brookes, Christopher"]
[Black "Otten, Martijn"]
[Result "0-1"]
[ECO "C16"]
[WhiteElo "2064"]
[BlackElo "1913"]
[PlyCount "36"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 b6 5. Qg4 Bf8 6. f4 Ne7 7. Bd3 Nbc6 8. Be3 Qd7 9. 0-0-0 Bb7 10. Nh3 0-0-0 11. Ng5 Nf5 12. Qh3 h6 13. Rhe1 Nxe3 14. Rxe3 Nxd4 15. Nf3 Bc5 16. Nxd4 Bxd4 17. Bb5 Bxe3+ 18. Qxe3 c6 0-1

[Event "Enschede op-B U16"]
[Site "Enschede"]
[Date "2009.08.07"]
[Round "7"]
[White "Otten, Martijn"]
[Black "De Vleeschauwer, Ruben"]
[Result "1-0"]
[ECO "D07"]
[WhiteElo "1913"]
[BlackElo "1770"]
[PlyCount "65"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. d4 e6 2. c4 d5 3. Nc3 Nf6 4. Nf3 Bb4 5. Bg5 Nc6 6. e3 h6 7. Bh4 0-0 8. Qc2 a6 9. Rd1 Be7 10. a3 Na5 11. Ne5 dxc4 12. Nxc4 Nxc4 13. Bxc4 b5 14. Be2 Bb7 15. 0-0 Nd7 16. Bxe7 Qxe7 17. Ne4 f5 18. Nd2 c5 19. Bf3 Bxf3 20. Nxf3 cxd4 21. Nxd4 Rac8 22. Qb3 Nc5 23. Qa2 Rf6 24. Rc1 Re8 25. Rfd1 Kh7 26. Nc6 Qf8 27. Ne5 f4 28. exf4 Rd8 29. Qb1+ g6 30. Rxd8 Qxd8 31. Rxc5 Qb6 32. Qc2 h5 33. Rc7+ 1-0

[Event "Enschede op-B U16"]
[Site "Enschede"]
[Date "2009.08.07"]
[Round "9"]
[White "Otten, Martijn"]
[Black "Edens, Maike"]
[Result "1-0"]
[ECO "D64"]
[WhiteElo "1913"]
[BlackElo "1865"]
[PlyCount "57"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Nbd7 5. Bg5 Be7 6. e3 0-0 7. Qc2 c6 8. Rc1 Re8 9. b3 h6 10. Bf4 Bb4 11. Bd3 c5 12. 0-0 Bxc3 13. Qxc3 b6 14. Ne5 Bb7 15. Rfd1 Rc8 16. Qb2 Nh5 17. Bg3 Nxg3 18. Nxd7 Qxd7 19. hxg3 Qe7 20. dxc5 Rxc5 21. Be2 Rec8 22. Rd4 e5 23. Rdd1 dxc4 24. Rxc4 Qc7 25. Qb1 b5 26. Rxc5 Qxc5 27. Qf5 Qc2 28. Qxc2 Rxc2 29. Rd8+ 1-0

[Event "Enschede op-B U16"]
[Site "Enschede"]
[Date "2009.08.05"]
[Round "6"]
[White "Damen, Igor"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "C02"]
[WhiteElo "1720"]
[BlackElo "1913"]
[PlyCount "71"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 Nh6 7. b4 cxd4 8. cxd4 Nf5 9. Bb2 Be7 10. Be2 Bd7 11. 0-0 0-0 12. g4 Nh4 13. Nxh4 Bxh4 14. Qd3 f5 15. f4 Be7 16. Nd2 fxg4 17. Bxg4 Nxb4 18. axb4 Bb5 19. Bxe6+ Kh8 20. Qh3 Bxf1 21. Rxf1 Qxb4 22. Bc3 Qb5 23. Bf5 h6 24. Rf3 Bb4 25. Qg4 Bxc3 26. Rxc3 Qb6 27. Nf3 Rae8 28. Rd3 Qb1+ 29. Kg2 Rc8 30. Qg6 Rc2+ 31. Kg3 Rxf5 32. Qxf5 Rc3 33. Qf8+ Kh7 34. Rxc3 Qg6+ 35. Kf2 Qb1 36. Re3 1-0

[Event "Enschede op-B U16"]
[Site "Enschede"]
[Date "2009.08.05"]
[Round "4"]
[White "Otten, Martijn"]
[Black "Hupkes, Jasper"]
[Result "1-0"]
[ECO "E20"]
[WhiteElo "1913"]
[BlackElo "1758"]
[PlyCount "133"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. d4 e6 2. c4 Nf6 3. Nc3 Bb4 4. f3 d5 5. a3 Be7 6. e4 0-0 7. e5 Ne8 8. Bd3 dxc4 9. Bxc4 c5 10. d5 exd5 11. Bxd5 Nc7 12. Be4 Qxd1+ 13. Kxd1 Rd8+ 14. Kc2 Nc6 15. Bxc6 bxc6 16. g4 Ne6 17. Nce2 Nd4+ 18. Kc3 Ba6 19. Nxd4 cxd4+ 20. Kc2 Rd5 21. f4 Bf1 22. h4 d3+ 23. Kd1 Bc5 24. Ke1 Bg2 25. Rh2 Be4 26. Nh3 Bf3 27. g5 Rad8 28. b4 Bd4 29. Rb1 c5 30. bxc5 Rxc5 31. Bd2 g6 32. Nf2 Bc3 33. Nd1 Bxd2+ 34. Rxd2 Rc4 35. Rf2 Re4+ 36. Kd2 Re2+ 37. Kc3 Rc8+ 38. Kxd3 Rd8+ 39. Kc3 Rxd1 40. Rb8+ Kg7 41. Rxf3 Ra1 42. Rb3 Re4 43. f5 gxf5 44. Rxf5 Re3+ 45. Kb4 Rxb3+ 46. Kxb3 Rb1+ 47. Ka4 Rh1 48. Rf4 Re1 49. Kb5 Rxe5+ 50. Ka6 Re7 51. a4 Kg6 52. Rf6+ Kg7 53. a5 Re6+ 54. Kxa7 Re1 55. a6 Rb1 56. Rb6 Re1 57. Ka8 Re8+ 58. Rb8 Re7 59. a7 Kg6 60. Rh8 Kg7 61. Rc8 Re1 62. Kb7 Rb1+ 63. Kc7 Rc1+ 64. Kd7 Rd1+ 65. Ke7 Re1+ 66. Kd6 Rd1+ 67. Ke5 1-0

[Event "Enschede op-B U16"]
[Site "Enschede"]
[Date "2009.08.03"]
[Round "1"]
[White "Otten, Martijn"]
[Black "Wallace, Gavin"]
[Result "0-1"]
[ECO "D80"]
[WhiteElo "1913"]
[BlackElo "1638"]
[PlyCount "60"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. e3 Bg7 5. Qb3 c6 6. cxd5 cxd5 7. Nf3 Nc6 8. Bd3 0-0 9. 0-0 a6 10. Bd2 b5 11. Rac1 Qd6 12. h3 Bd7 13. Ne2 Rfb8 14. Ng3 b4 15. Qd1 Be6 16. Qe2 a5 17. b3 Bd7 18. Bb5 Nd8 19. Bxd7 Nxd7 20. e4 Ne6 21. e5 Qb6 22. Be3 Rc8 23. Qd2 f6 24. Rfd1 Nef8 25. Ne2 e6 26. Bh6 Qb8 27. Bxg7 Kxg7 28. Qf4 fxe5 29. Nxe5 Rxc1 30. Rxc1 Qe8 0-1

[Event "NED-ch U17"]
[Site "Venlo"]
[Date "2009.05.02"]
[Round "9"]
[White "Van den Bergh, Don"]
[Black "Otten, Martijn"]
[Result "0-1"]
[ECO "C11"]
[WhiteElo "1757"]
[BlackElo "1735"]
[PlyCount "108"]
[EventDate "2009.04.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 a6 8. Qd2 b5 9. h4 Qb6 10. Ne2 f6 11. c3 Be7 12. f5 exf5 13. Nf4 cxd4 14. Bxd4 Nxd4 15. Nxd4 Nxe5 16. Nxd5 Qd6 17. Bxb5+ Kf8 18. Nxe7 Qxe7 19. Be2 Kf7 20. 0-0 Rd8 21. Qc2 Qc5 22. Rad1 Rxd4 23. Rxd4 Nc6 24. Qb3+ Kf8 25. Qc4 Qb6 26. Rfd1 Nxd4 27. Qxd4 Qxd4+ 28. Rxd4 Be6 29. Bc4 Ke7 30. Kf2 g5 31. Ke3 Ra7 32. Bxe6 Kxe6 33. c4 a5 34. Rd5 gxh4 35. Kf4 Rg7 36. Kf3 Rg4 37. Rxa5 Rxc4 38. a3 h5 39. b4 Rc3+ 40. Kf2 h3 41. gxh3 Rxh3 42. a4 Rb3 43. b5 h4 44. Ra8 Rb2+ 45. Kg1 Ke5 46. Rb8 h3 47. b6 f4 48. a5 h2+ 49. Kh1 f3 50. Rc8 Rb1+ 51. Kxh2 f2 52. b7 f1Q 53. b8Q+ Rxb8 54. Rxb8 Qa6 0-1

[Event "NED-ch U17"]
[Site "Venlo"]
[Date "2009.05.01"]
[Round "8"]
[White "Otten, Martijn"]
[Black "Duburg, Jamie"]
[Result "1-0"]
[ECO "A29"]
[WhiteElo "1735"]
[BlackElo "1842"]
[PlyCount "65"]
[EventDate "2009.04.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nxc3 7. dxc3 Qxd1+ 8. Kxd1 Bc5 9. e3 0-0 10. b4 Bd6 11. h3 Be6 12. Nd2 f5 13. e4 f4 14. g4 Rfd8 15. Kc2 Ne7 16. f3 a6 17. Bf1 c5 18. b5 axb5 19. Bxb5 Nc8 20. Bb2 Nb6 21. a4 Bc7 22. Rhd1 Rd6 23. Ba3 Nd7 24. Nc4 Rxd1 25. Rxd1 Rd8 26. Nd6 Nf8 27. Bxc5 b6 28. Ba3 Ng6 29. Bc4 Bxc4 30. Nxc4 Rxd1 31. Kxd1 Nh4 32. Ke2 Kf7 33. Bd6 1-0

[Event "NED-ch U17"]
[Site "Venlo"]
[Date "2009.04.30"]
[Round "7"]
[White "Van Meegen, Ruud"]
[Black "Otten, Martijn"]
[Result "1/2-1/2"]
[ECO "C12"]
[WhiteElo "1865"]
[BlackElo "1735"]
[PlyCount "45"]
[EventDate "2009.04.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Bxc3 7. bxc3 Ne4 8. Qg4 Kf8 9. Bd3 Nxd2 10. Kxd2 Qg5+ 11. Qxg5 hxg5 12. h3 c5 13. Nf3 c4 14. Be2 f6 15. Rhe1 Kf7 16. a4 Nd7 17. Kc1 b6 18. exf6 gxf6 19. Nd2 Bb7 20. Bg4 Nf8 21. Nb1 a6 22. Kd2 Bc6 23. Ra2 1/2-1/2

[Event "NED-ch U17"]
[Site "Venlo"]
[Date "2009.04.29"]
[Round "6"]
[White "Otten, Martijn"]
[Black "Gunther, Justin"]
[Result "1-0"]
[ECO "A50"]
[WhiteElo "1735"]
[BlackElo "2015"]
[PlyCount "105"]
[EventDate "2009.04.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. c4 e6 2. Nc3 Nf6 3. e4 d6 4. d4 b6 5. Bg5 Be7 6. Be2 0-0 7. Nf3 Nbd7 8. Qc2 c5 9. Rd1 Ne8 10. Be3 a6 11. 0-0 Qc7 12. dxc5 bxc5 13. Ne1 Bf6 14. f4 Rb8 15. Nd3 Bd4 16. Rf3 Nef6 17. Nf2 Bxe3 18. Rxe3 Rd8 19. g4 Ne8 20. Rh3 Nf8 21. Bd3 Ng6 22. Ne2 Qb7 23. b3 d5 24. f5 Ne5 25. fxe6 d4 26. Nf4 fxe6 27. Be2 Qc7 28. Rf1 Qe7 29. Rh5 Qd6 30. N2d3 Nxd3 31. Nxd3 g6 32. Rxc5 Bb7 33. e5 Qe7 34. Bf3 Qg5 35. Bxb7 Rxb7 36. Rf4 Ng7 37. Qf2 Nh5 38. h4 Nxf4 39. hxg5 Nh3+ 40. Kg2 Nxf2 41. Kxf2 Kf7 42. Rc6 Ra7 43. Kf3 h5 44. gxh6 g5 45. Nc5 d3 46. Nxe6 Rg8 47. h7 Re8 48. Ke3 Rd7 49. Kd2 Rde7 50. Nxg5+ Kg7 51. Rc5 Kg6 52. Ne4 Kxh7 53. Nf6+ 1-0

[Event "NED-ch U17"]
[Site "Venlo"]
[Date "2009.04.28"]
[Round "5"]
[White "Faber, Jort"]
[Black "Otten, Martijn"]
[Result "0-1"]
[ECO "C01"]
[WhiteElo "1840"]
[BlackElo "1735"]
[PlyCount "52"]
[EventDate "2009.04.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Bf4 Bd6 5. Bxd6 Qxd6 6. Nc3 Nc6 7. Bd3 Nge7 8. Nge2 Bg4 9. f3 Bf5 10. g4 Bxd3 11. Qxd3 0-0-0 12. 0-0-0 Na5 13. b3 a6 14. Kb2 Qb6 15. Na4 Qf6 16. Ng3 g6 17. Rhe1 Rhe8 18. Nc5 Nec6 19. c3 Nb8 20. Re2 Rxe2+ 21. Qxe2 Nac6 22. Re1 Nxd4 23. Qe3 Nb5 24. g5 Qh8 25. Qf4 Qxc3+ 26. Kb1 Na3# 0-1

[Event "NED-ch U17"]
[Site "Venlo"]
[Date "2009.04.27"]
[Round "4"]
[White "Slagter, David"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "C12"]
[WhiteElo "1984"]
[BlackElo "1735"]
[PlyCount "73"]
[EventDate "2009.04.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. Bd3 h6 6. Bxf6 Qxf6 7. e5 Qe7 8. Qg4 Kf8 9. a3 Bxc3+ 10. bxc3 c5 11. h4 b6 12. Rh3 h5 13. Qf4 Ba6 14. Rf3 Bxd3 15. cxd3 Nd7 16. Nh3 Kg8 17. Kf1 Rf8 18. Re1 Rh6 19. dxc5 Nxc5 20. d4 Nb7 21. Rg3 Rg6 22. Rg5 Rxg5 23. Nxg5 Na5 24. Qf3 g6 25. g4 Nc4 26. Kg2 Nd2 27. Qg3 hxg4 28. Qxg4 Ne4 29. Nxe4 dxe4 30. h5 Kg7 31. Rxe4 Qxa3 32. Qg5 Rg8 33. Rf4 Qf8 34. hxg6 Qa8+ 35. f3 f5 36. Qf6+ Kh6 37. Rh4# 1-0

[Event "NED-ch U17"]
[Site "Venlo"]
[Date "2009.04.26"]
[Round "3"]
[White "Otten, Martijn"]
[Black "Mostertman, Xander"]
[Result "0-1"]
[ECO "A31"]
[WhiteElo "1735"]
[BlackElo "1837"]
[PlyCount "76"]
[EventDate "2009.04.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 e5 5. Nf3 Nc6 6. a3 a5 7. Bg5 Bc5 8. e3 d6 9. Nc3 Bg4 10. Ne4 Qe7 11. h3 Bh5 12. g4 Bg6 13. Bxf6 gxf6 14. Ng3 e4 15. Nd2 Qe5 16. Qb1 Bxe3 17. Ndxe4 Bd4 18. Ra2 Qf4 19. Qc2 0-0 20. Bg2 Rae8 21. Kf1 Re5 22. Qd2 Qxd2 23. Nxd2 Bd3+ 24. Kg1 Re1+ 25. Bf1 Rd1 26. b3 Bc3 27. Nge4 Rxf1+ 28. Nxf1 Bxe4 29. f3 Bxf3 30. Rhh2 Bd4+ 31. Rhf2 Re8 32. Ng3 Re1+ 33. Kh2 Bxf2 34. Rxf2 Ne5 35. Nf5 Rd1 36. Nh4 Rd3 37. b4 Rxa3 38. bxa5 Bxg4 0-1

[Event "NED-ch U17"]
[Site "Venlo"]
[Date "2009.04.25"]
[Round "2"]
[White "Klapwijk, Bram"]
[Black "Otten, Martijn"]
[Result "1/2-1/2"]
[ECO "C01"]
[WhiteElo "1869"]
[BlackElo "1735"]
[PlyCount "145"]
[EventDate "2009.04.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Bd3 Nc6 4. c3 Nf6 5. e5 Nd7 6. Ne2 Be7 7. 0-0 f5 8. Nf4 Nf8 9. Qh5+ g6 10. Qh6 Rg8 11. Nh3 g5 12. Qh5+ Kd7 13. Qf7 Rg6 14. Nxg5 Qe8 15. Qxe8+ Kxe8 16. Nh3 Bd7 17. Be2 Kd8 18. Bh5 Rg8 19. Be3 Be8 20. Be2 Nb8 21. Nd2 Nbd7 22. Rfd1 Nb6 23. c4 dxc4 24. Nxc4 Bc6 25. Nf4 Bg5 26. Nxb6 axb6 27. d5 Ba4 28. b3 Bxf4 29. Bxf4 Bd7 30. dxe6 Nxe6 31. Bg3 Kc8 32. Bc4 b5 33. Bd5 c6 34. Bf3 Ng5 35. Bh5 f4 36. Bh4 Be6 37. Kf1 Bd5 38. Bg4+ Kc7 39. Rac1 Kb6 40. Rc2 Nf7 41. f3 Nxe5 42. Bf2+ Ka6 43. Bf5 Rxg2 44. Rxd5 Rxf2+ 45. Rxf2 cxd5 46. Bxh7 Kb6 47. Bf5 Rf8 48. Be6 Kc5 49. Kg2 Kd6 50. Bg4 Ra8 51. Rd2 Nc6 52. Bf5 Ke5 53. Bb1 Nd4 54. Rd1 Rg8+ 55. Kf2 Rh8 56. Rh1 Rh3 57. Re1+ Kd6 58. Kg2 Rxh2+ 59. Kxh2 Nxf3+ 60. Kg2 Nxe1+ 61. Kf2 Kc5 62. Kxe1 Kb4 63. Kd2 Ka3 64. Kc3 b4+ 65. Kc2 f3 66. Kc1 b6 67. Bd3 Kxa2 68. Kc2 f2 69. Bf1 d4 70. Bc4 Ka3 71. Bd3 Ka2 72. Bc4 Ka3 73. Bd3 1/2-1/2

[Event "NED-ch U17"]
[Site "Venlo"]
[Date "2009.04.24"]
[Round "1"]
[White "Otten, Martijn"]
[Black "Swinkels, Maurice"]
[Result "0-1"]
[ECO "A52"]
[WhiteElo "1735"]
[BlackElo "1972"]
[PlyCount "80"]
[EventDate "2009.04.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 Nxe5 5. f4 Ng6 6. Nf3 Nc6 7. Nc3 Bc5 8. a3 a5 9. Qd3 d6 10. Be3 Bxe3 11. Qxe3 0-0 12. h4 f5 13. h5 Nxf4 14. 0-0-0 fxe4 15. Qxe4 Qe7 16. Qxe7 Nxe7 17. Nb5 Bd7 18. c5 Bxb5 19. Bxb5 Nf5 20. Bc4+ Kh8 21. Ng5 Ne3 22. Ba2 Nxd1 23. Kxd1 d5 24. g3 Ng2 25. h6 g6 26. Kc1 c6 27. Bb1 Rae8 28. Kd1 Ne3+ 29. Kc1 Re5 30. Re1 d4 31. Nh3 Rxc5+ 32. Kd2 Nc4+ 33. Kd3 Nxb2+ 34. Kxd4 Rc4+ 35. Ke3 Re8+ 36. Kd2 Rxe1 37. Kxe1 Rc1+ 38. Kd2 Rxb1 39. Ng5 Rf1 40. Kc3 Na4+ 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2008.07.01"]
[Round "7"]
[White "Van Gunsteren, Lex"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "D08"]
[WhiteElo "1642"]
[BlackElo "1796"]
[PlyCount "115"]
[EventDate "2008.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 d5 2. c4 e5 3. cxd5 Qxd5 4. dxe5 Qxe5 5. Nf3 Bb4+ 6. Nbd2 Qd6 7. e4 Bd7 8. a3 Bc5 9. Bc4 Nc6 10. 0-0 f6 11. b4 Bd4 12. Rb1 Bg4 13. Qb3 0-0-0 14. Bd5 Nge7 15. Nc4 Qd7 16. Nxd4 Nxd4 17. Qe3 Ne2+ 18. Kh1 Nxd5 19. Qxa7 Nb6 20. Be3 Nd4 21. Na5 Qd6 22. Qxb7+ Kd7 23. Bxd4 Be2 24. Bc5 Rb8 25. Bxd6 Rxb7 26. Nxb7 Bxf1 27. Rxf1 cxd6 28. Rc1 Re8 29. f3 g5 30. Kg1 Ke6 31. Rc6 Nc8 32. a4 Kd7 33. b5 Re5 34. Kf2 Ne7 35. Rc1 f5 36. exf5 Rxf5 37. b6 Nc6 38. Rd1 Rf6 39. a5 Nb4 40. Rd4 Na6 41. Ke3 h6 42. Kd3 Kc6 43. Nxd6 Rxd6 44. Rxd6+ Kxd6 45. Ke4 Ke6 46. g3 Nc5+ 47. Ke3 Kf5 48. b7 Na6 49. Kd4 Ke6 50. Kc4 Kd6 51. Kb5 Nb8 52. a6 Kc7 53. a7 Kxb7 54. axb8Q+ Kxb8 55. Kc6 Kc8 56. Kd6 h5 57. Ke6 h4 58. Kf5 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2008.06.24"]
[Round "6"]
[White "Otten, Martijn"]
[Black "Duijnisveld, Arnold"]
[Result "1-0"]
[ECO "D30"]
[WhiteElo "1796"]
[BlackElo "1544"]
[PlyCount "83"]
[EventDate "2008.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Bf4 a6 4. Nc3 c6 5. e3 Nf6 6. Nf3 Be7 7. Bd3 dxc4 8. Bxc4 Nbd7 9. 0-0 0-0 10. Qc2 b5 11. Bd3 Bb7 12. Rad1 Qc8 13. Ne4 Nxe4 14. Bxe4 Nf6 15. Bg5 h6 16. Bxf6 Bxf6 17. Rc1 Qc7 18. Bxc6 Rac8 19. Be4 Qxc2 20. Bxc2 Bxf3 21. gxf3 g6 22. Be4 a5 23. Bb7 Rb8 24. Ba6 b4 25. Rc5 Bd8 26. b3 Bb6 27. Rb5 Bc7 28. Rc1 Rxb5 29. Bxb5 Rc8 30. Kg2 Rb8 31. Rxc7 Rxb5 32. Rc5 Rxc5 33. dxc5 Kf8 34. Kg3 Ke7 35. Kf4 Kd7 36. Ke5 Kc6 37. Kf6 Kxc5 38. Kxf7 Kb5 39. Kxe6 a4 40. bxa4+ Kxa4 41. Kd5 Ka3 42. Kc4 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2008.06.10"]
[Round "4"]
[White "Sharshov, Wadim"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "C22"]
[WhiteElo "1736"]
[BlackElo "1796"]
[PlyCount "77"]
[EventDate "2008.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 b6 5. Bc4 Bc5 6. Qe2 Nd4 7. Qd3 Qf6 8. Nc3 Ne7 9. Be3 Nec6 10. Nd5 Qd6 11. Bxd4 Bxd4 12. c3 Bf6 13. Nf3 0-0 14. 0-0-0 Ne5 15. Nxe5 Qxe5 16. f4 Qd6 17. e5 Bxe5 18. fxe5 Qxe5 19. h4 c6 20. Rhe1 Qh5 21. Ne7+ Kh8 22. Nxc8 Raxc8 23. Qxd7 Qxh4 24. Bb3 a5 25. Bc2 g6 26. Kb1 Kg8 27. Rh1 Qg5 28. Qd4 c5 29. Qh4 Qxh4 30. Rxh4 Rfd8 31. Rdh1 h5 32. g4 hxg4 33. Rxg4 Kg7 34. Rgh4 Re8 35. Rh7+ Kg8 36. Bb3 Rf8 37. Bxf7+ Rxf7 38. Rh8+ Kg7 39. Rxc8 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2008.06.03"]
[Round "3"]
[White "Otten, Martijn"]
[Black "Aalbers, Klaas"]
[Result "0-1"]
[ECO "A84"]
[WhiteElo "1796"]
[BlackElo "1882"]
[PlyCount "84"]
[EventDate "2008.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 e6 4. Bf4 f5 5. e3 Nf6 6. Nf3 Bd6 7. Bxd6 Qxd6 8. Qb3 Nbd7 9. c5 Qe7 10. Qa4 Ne4 11. Bd3 0-0 12. Rb1 g5 13. h3 e5 14. Bc2 exd4 15. Nxd4 Ndxc5 16. Qa3 Re8 17. Nxe4 Nxe4 18. Qxe7 Rxe7 19. Bxe4 Rxe4 20. Kd2 Bd7 21. f3 Re7 22. b4 Rae8 23. Rhe1 Kf7 24. Re2 Kf6 25. g3 Ke5 26. Rf1 f4 27. Kd3 fxg3 28. Rg1 Kf6 29. Rxg3 h5 30. f4 g4 31. Reg2 h4 32. Nxc6 bxc6 33. Rxg4 Bxg4 34. Rxg4 Rxe3+ 35. Kd4 Rxh3 36. Rg5 Re4+ 37. Kc5 Rc3+ 38. Kd6 Rxf4 39. Rh5 Rxb4 40. a3 Rxa3 41. Kxc6 Rc3+ 42. Kxd5 Rb5+ 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2008.05.27"]
[Round "2"]
[White "Renes, David"]
[Black "Otten, Martijn"]
[Result "0-1"]
[ECO "D02"]
[BlackElo "1796"]
[PlyCount "17"]
[EventDate "2008.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 c5 3. e3 Bg4 4. h3 Bh5 5. g4 Bg6 6. Nbd2 Nc6 7. Nb3 Nb4 8. Bd2 Nxc2+ 9. Ke2 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2008.05.20"]
[Round "1"]
[White "Otten, Martijn"]
[Black "Jap Tjoen San, Linda"]
[Result "0-1"]
[ECO "E34"]
[WhiteElo "1796"]
[BlackElo "2139"]
[PlyCount "112"]
[EventDate "2008.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. Bg5 h6 6. Bh4 g5 7. Bg3 Ne4 8. e3 Nxg3 9. hxg3 c6 10. Nf3 Nd7 11. Be2 Qf6 12. 0-0-0 g4 13. Nh2 h5 14. f3 gxf3 15. gxf3 dxc4 16. Ne4 Qg7 17. Qxc4 Be7 18. Rdg1 Nb6 19. Qc2 e5 20. dxe5 Qxe5 21. f4 Qa5 22. Qc3 Qxc3+ 23. Nxc3 Bc5 24. Nf1 Be6 25. Bxh5 Nc4 26. Be2 0-0-0 27. Bxc4 Bxc4 28. Rxh8 Rxh8 29. Ne4 Be7 30. Nfd2 Bd3 31. Nf2 Be2 32. Re1 Bb5 33. Nfe4 c5 34. Nb3 b6 35. Rd1 Be2 36. Rd5 Rh1+ 37. Kc2 Bf3 38. Re5 Kd7 39. Nbd2 Rh2 40. Kb3 Be2 41. a3 f6 42. Rd5+ Kc6 43. Rf5 Bg4 44. Rxf6+ Bxf6 45. Nxf6 Rxd2 46. Nxg4 Rg2 47. Ne5+ Kd5 48. g4 Rg3 49. g5 Rxe3+ 50. Kc2 Ke4 51. Nc6 Re2+ 52. Kb3 Kxf4 53. Nxa7 Kxg5 54. Nc8 b5 55. Nd6 c4+ 56. Kc3 Re3+ 0-1

[Event "Twente Young Master op-C"]
[Site "Twente"]
[Date "2007.08.11"]
[Round "9"]
[White "Skandar, Kambiz"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "C56"]
[WhiteElo "1714"]
[BlackElo "1715"]
[PlyCount "104"]
[EventDate "2007.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[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. Bc4 Nf6 5. 0-0 Nxe4 6. Re1 d5 7. Nxd4 Bc5 8. Bb5 0-0 9. Be3 Nxd4 10. Bxd4 Bxd4 11. Qxd4 c5 12. Qe3 Qb6 13. Na3 a6 14. Bd3 Qxb2 15. Bxe4 dxe4 16. Qxc5 Re8 17. Rad1 b6 18. Rxe4 Be6 19. Qd6 Bxa2 20. Nc4 Qxc2 21. Rxe8+ Rxe8 22. Nxb6 Qc3 23. Rf1 Bc4 24. Qc6 Rf8 25. Qxc4 Qxc4 26. Nxc4 Rc8 27. Ne3 f6 28. Ra1 Rc6 29. Nd5 Rc5 30. Ne3 a5 31. Kf1 Kf7 32. Ra4 g6 33. Nc4 g5 34. Nxa5 Rc2 35. Nc4 h5 36. Ne3 Rb2 37. h4 g4 38. g3 Kg6 39. Nd5 Rb5 40. Nf4+ Kg7 41. Rd4 Rb3 42. Nxh5+ Kg6 43. Nf4+ Kf5 44. Ne2 Ra3 45. Rf4+ Ke5 46. Rxg4 f5 47. Rg5 Ke4 48. Kg2 Ra1 49. h5 Ra7 50. h6 Rh7 51. Rh5 Ke5 52. g4 Kd5 1-0

[Event "Twente Young Master op-C"]
[Site "Twente"]
[Date "2007.08.07"]
[Round "3"]
[White "Evengroen, Henk Jan"]
[Black "Otten, Martijn"]
[Result "0-1"]
[ECO "B33"]
[WhiteElo "1873"]
[BlackElo "1715"]
[PlyCount "82"]
[EventDate "2007.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Qa5+ 10. Bd2 Qd8 11. Be3 Rb8 12. f3 Be7 13. Be2 0-0 14. 0-0 Be6 15. Bf2 Nd7 16. Nxe7+ Qxe7 17. c3 f5 18. exf5 Rxf5 19. Bd3 Rf7 20. Be4 Na5 21. Qd2 Nf6 22. Bc2 Nc4 23. Nxc4 bxc4 24. Ba4 Bf5 25. Rfd1 Bd3 26. b3 d5 27. Qe3 e4 28. Re1 Qb7 29. f4 Ng4 30. Qg3 Nxf2 31. Qxf2 Rbf8 32. Qc5 Rc8 33. Qd6 Rf6 34. Qe5 Rcf8 35. g3 Qb6+ 36. Kg2 Rf5 37. Qe7 Qg6 38. Kh1 Qf6 39. Qc5 Rd8 40. Qb4 g5 41. Rg1 e3 0-1

[Event "Twente Young Master op-C"]
[Site "Twente"]
[Date "2007.08.07"]
[Round "2"]
[White "Otten, Martijn"]
[Black "Kers, Kyra Tiana"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "1715"]
[BlackElo "1355"]
[PlyCount "77"]
[EventDate "2007.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bf4 c6 5. e3 Bd6 6. Bg3 Ne4 7. Qc2 Bb4 8. Bd3 Qa5 9. Bxe4 dxe4 10. Nge2 f5 11. 0-0 0-0 12. Nd1 Nd7 13. c5 Qd8 14. a3 Ba5 15. b4 Bc7 16. Nb2 Bxg3 17. fxg3 e5 18. Nc4 Qg5 19. Qb3 Kh8 20. Nd6 Qg4 21. Nf7+ Rxf7 22. Qxf7 Nf6 23. Qf8+ Ng8 24. Rf2 b6 25. dxe5 Bb7 26. Qxf5 Qxf5 27. Rxf5 Re8 28. Rd1 Nf6 29. exf6 gxf6 30. Rxf6 bxc5 31. bxc5 Re7 32. Nd4 Kg7 33. Rd6 Kf7 34. Nxc6 Bxc6 35. Rxc6 Rb7 36. Rc8 a6 37. c6 Rb2 38. c7 Rc2 39. Rh8 1-0

[Event "Twente Young Master op-C"]
[Site "Twente"]
[Date "2007.08.06"]
[Round "1"]
[White "Vierkant, Alexander"]
[Black "Otten, Martijn"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "1400"]
[BlackElo "1715"]
[PlyCount "35"]
[EventDate "2007.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[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 Bc5 5. Nxc6 Qf6 6. f3 dxc6 7. Bc4 Bd7 8. Nc3 0-0-0 9. Qe2 Bd4 10. Bd2 Ne7 11. 0-0-0 b5 12. Bb3 Kb7 13. a3 Ra8 14. Qd3 Rhd8 15. Rhe1 a5 16. f4 Bf2 17. Rf1 Bg4 18. Rxf2 0-1

[Event "NED-ch U15"]
[Site "Venlo"]
[Date "2007.05.05"]
[Round "9"]
[White "Gunther, Justin"]
[Black "Otten, Martijn"]
[Result "0-1"]
[ECO "C56"]
[WhiteElo "1715"]
[BlackElo "1646"]
[PlyCount "126"]
[EventDate "2007.04.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. e5 d5 6. Bb5 Ne4 7. Nxd4 Bd7 8. Bxc6 bxc6 9. 0-0 Bc5 10. Be3 Bb6 11. f3 Ng5 12. f4 Ne4 13. Kh1 c5 14. Nf3 Bg4 15. Nbd2 Qe7 16. a4 a5 17. Qe1 Nxd2 18. Bxd2 0-0 19. h3 Bf5 20. c3 c4 21. Be3 c5 22. Qf2 Rfd8 23. Rad1 Rac8 24. Rd2 Qd7 25. Ra1 Bd3 26. Qg1 Qf5 27. Kh2 d4 28. Bf2 Qxf4+ 29. Bg3 Qe3 30. Re1 Qxg1+ 31. Kxg1 h6 32. Rf2 Rc6 33. Nd2 Re6 34. Rf3 Bc7 35. Rf2 f6 36. Nf3 dxc3 37. bxc3 Rde8 38. Rb2 Rb8 39. Rxb8+ Bxb8 40. Kh2 Kf7 41. h4 Bc2 42. Rc1 Bb3 43. exf6 Bxg3+ 44. Kxg3 Kxf6 45. Kf2 Kf5 46. Nd2 Kg4 47. g3 Rf6+ 48. Kg2 Ra6 49. Rf1 g5 50. hxg5 hxg5 51. Kf2 Bxa4 52. Ne4 Bc2 53. Nd2 Rf6+ 54. Kg2 Rxf1 55. Nxf1 Be4+ 56. Kf2 Bd3 57. Ne3+ Kh3 58. Nd1 a4 59. Kf3 a3 60. Nf2+ Kh2 61. Ng4+ Kg1 62. Nf2 a2 63. Nh3+ Kf1 0-1

[Event "NED-ch U15"]
[Site "Venlo"]
[Date "2007.05.04"]
[Round "7"]
[White "Frijns, Raoul"]
[Black "Otten, Martijn"]
[Result "1/2-1/2"]
[ECO "D08"]
[BlackElo "1646"]
[PlyCount "129"]
[EventDate "2007.04.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. e3 Bf5 6. a3 Be4 7. Nxd4 Nxe5 8. Nc3 Bg6 9. f4 Nc6 10. f5 Nxd4 11. fxg6 Ne6 12. gxf7+ Kxf7 13. Be2 Qxd1+ 14. Bxd1 Nf6 15. 0-0 Bc5 16. b4 Bd6 17. Bb2 Be5 18. Rb1 Rad8 19. Nd5 Bxb2 20. Rxb2 Kg8 21. Nxf6+ gxf6 22. Bg4 Kf7 23. Rbf2 Ng5 24. Rxf6+ Kg8 25. R6f4 Re8 26. h4 Ne4 27. Bh5 Re5 28. Bf7+ Kg7 29. Bd5 Nd6 30. Re1 c6 31. Bf3 Rhe8 32. c5 Nf5 33. e4 Nd4 34. Rd1 Rd8 35. Kf2 Ree8 36. Rd2 Nb5 37. Rxd8 Rxd8 38. a4 Nc3 39. a5 Rd4 40. Rg4+ Kf8 41. e5 Rxg4 42. Bxg4 Nd5 43. Bc8 Nxb4 44. Ke2 Na6 45. Bxb7 Nxc5 46. Bxc6 Nb3 47. Be4 h6 48. a6 Ke7 49. Bd5 Nc5 50. Bc4 Nd7 51. e6 Ne5 52. Bb3 Nc6 53. Ke3 Nb4 54. Bc4 Nc2+ 55. Kf4 Ne1 56. g4 Ng2+ 57. Kg3 Ne3 58. Bb3 Kf6 59. g5+ hxg5 60. hxg5+ Kxg5 61. Kf3 Nf5 62. Ke4 Kf6 63. Kd5 Ke7 64. Kc5 Ng7 65. Kc6 1/2-1/2

[Event "NED-ch U15"]
[Site "Venlo"]
[Date "2007.05.04"]
[Round "8"]
[White "Otten, Martijn"]
[Black "Wallace, Gavin"]
[Result "1-0"]
[ECO "E61"]
[WhiteElo "1646"]
[BlackElo "1553"]
[PlyCount "101"]
[EventDate "2007.04.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Bf4 0-0 5. e3 d6 6. Nf3 Bf5 7. Qb3 b6 8. Be2 Nbd7 9. 0-0 Re8 10. Bg5 h6 11. Bxf6 Nxf6 12. Nd2 c5 13. d5 Kh7 14. e4 Bc8 15. h3 Bb7 16. Bd3 Qc7 17. Rae1 a6 18. a4 e6 19. Qc2 Re7 20. f4 Rae8 21. Ne2 exd5 22. exd5 Qd7 23. f5 g5 24. b3 Kg8 25. Qb1 Nh5 26. Ne4 Nf6 27. Nf2 Kh8 28. Ng3 Kg8 29. Nge4 Kh8 30. Kh1 Kg8 31. Nxf6+ Bxf6 32. Ne4 Bd4 33. Qd1 f6 34. Qh5 Rh7 35. Qg6+ Kf8 36. Nxd6 Rxe1 37. Rxe1 Be5 38. Ne4 Qf7 39. Nf2 Bc8 40. Ng4 Bc3 41. Re2 Bd4 42. Qxf7+ Kxf7 43. Re6 h5 44. Nh2 g4 45. d6 gxh3 46. Re7+ Kg8 47. Re8+ Kf7 48. Rxc8 hxg2+ 49. Kxg2 Rg7+ 50. Kf3 Rg1 51. d7 1-0

[Event "NED-ch U15"]
[Site "Venlo"]
[Date "2007.05.03"]
[Round "6"]
[White "Otten, Martijn"]
[Black "Rauw, Gert Jan"]
[Result "0-1"]
[ECO "D37"]
[WhiteElo "1646"]
[BlackElo "1837"]
[PlyCount "50"]
[EventDate "2007.04.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Bf4 e6 5. e3 Be7 6. Nf3 0-0 7. Bd3 dxc4 8. Bxc4 b5 9. Bd3 Nbd7 10. Qc2 Bb7 11. 0-0 Rc8 12. Qe2 b4 13. Nd1 c5 14. Ne5 cxd4 15. exd4 Nb6 16. Be3 Nbd5 17. Ba6 Qb6 18. Bxb7 Qxb7 19. f4 Rfd8 20. Rf3 Nxe3 21. Qxe3 Rxd4 22. Nf2 Bc5 23. Nfd3 Rxd3 24. Nxd3 Bxe3+ 25. Rxe3 Qb6 0-1

[Event "NED-ch U15"]
[Site "Venlo"]
[Date "2007.05.02"]
[Round "5"]
[White "Offringa, Joost"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "C56"]
[WhiteElo "1852"]
[BlackElo "1646"]
[PlyCount "125"]
[EventDate "2007.04.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. 0-0 Nxe4 6. Re1 d5 7. Bxd5 Qxd5 8. Nc3 Qh5 9. Nxe4 Be6 10. Bg5 Be7 11. Bxe7 Nxe7 12. Qxd4 0-0 13. Qc5 Nd5 14. Neg5 Qg6 15. c4 b6 16. Qd4 Nb4 17. Qd2 a5 18. Rad1 h6 19. Nxe6 fxe6 20. Qe2 Rae8 21. Rd7 Na6 22. Kh1 Qf6 23. h3 Kh8 24. Ne5 Kg8 25. f3 Rc8 26. Ng4 Qf5 27. Qe5 Qxe5 28. Nxe5 Nc5 29. Rd2 Rcd8 30. Red1 Nb7 31. Rd7 Nd6 32. Rxc7 Nf5 33. Rcd7 Rxd7 34. Rxd7 Rc8 35. b3 Rc5 36. Nd3 Rc6 37. Kh2 a4 38. Ne5 Rc5 39. Rd8+ Kh7 40. Nd7 Ra5 41. Nxb6 axb3 42. axb3 Kg6 43. Na4 Ne3 44. Rb8 Nf1+ 45. Kg1 Nd2 46. Nc3 Ra3 47. c5 Nxb3 48. Nb1 Ra5 49. Rxb3 Rxc5 50. Nd2 Kf5 51. Ne4 Rc6 52. Kh2 g5 53. Rb8 e5 54. Rd8 Ke6 55. Kg3 Ke7 56. Rh8 Kf7 57. Rh7+ Kg6 58. Rd7 Rc2 59. Rd2 Rxd2 60. Nxd2 h5 61. h4 Kf5 62. hxg5 Kxg5 63. Nc4 1-0

[Event "NED-ch U15"]
[Site "Venlo"]
[Date "2007.05.02"]
[Round "4"]
[White "Otten, Martijn"]
[Black "Terlouw, Mario"]
[Result "0-1"]
[ECO "A85"]
[WhiteElo "1646"]
[BlackElo "1689"]
[PlyCount "94"]
[EventDate "2007.04.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. d4 e6 2. c4 f5 3. Nc3 Nf6 4. Bg5 Be7 5. e3 d6 6. Nf3 0-0 7. Be2 Nc6 8. 0-0 e5 9. d5 Nb8 10. Nd2 Nbd7 11. f4 e4 12. Nb3 Nb6 13. a4 a5 14. Nd4 Bd7 15. Qb3 Kh8 16. h3 c6 17. g4 fxg4 18. hxg4 c5 19. Nc2 Bxg4 20. Bxf6 Rxf6 21. Bxg4 Rg6 22. Kf2 Bh4+ 23. Ke2 Rxg4 24. Nxe4 Qe8 25. Kd3 Nd7 26. Qb5 Qe7 27. Nd2 Re8 28. Kc3 Rg2 29. Rad1 Nf6 30. Kb3 Ng4 31. Rf3 Bg3 32. Ka2 Nh2 33. Rc1 Nxf3 34. Nxf3 Rf8 35. Ng5 Bh4 36. Ne6 Rg8 37. Qxa5 Bf6 38. Qb6 Qe8 39. Ka3 Qg6 40. Qb3 Rd2 41. Ka2 h5 42. e4 Qxe4 43. Kb1 Rd3 44. Qb6 Qxc4 45. Nc7 Rb3 46. Rh1 h4 47. Qxd6 Rxb2+ 0-1

[Event "NED-ch U15"]
[Site "Venlo"]
[Date "2007.05.01"]
[Round "3"]
[White "Kirana, Marco"]
[Black "Otten, Martijn"]
[Result "0-1"]
[ECO "C54"]
[BlackElo "1646"]
[PlyCount "122"]
[EventDate "2007.04.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. 0-0 Bxc3 9. d5 Na5 10. bxc3 Nxc4 11. Qd4 0-0 12. Qxe4 Nd6 13. Qd3 Re8 14. Ng5 f5 15. Bf4 h6 16. Nf3 Ne4 17. Nd4 d6 18. f3 Nc5 19. Qc2 Qf6 20. Rfe1 Bd7 21. Nb3 Ba4 22. Be3 b5 23. Bd4 Qh4 24. Bf2 Qf6 25. c4 b4 26. Rab1 a6 27. Qd2 Rxe1+ 28. Bxe1 Bxb3 29. axb3 a5 30. Bf2 Rb8 31. Bd4 Qg6 32. Qa2 f4 33. Re1 Ra8 34. Re7 Ra7 35. Rxg7+ Qxg7 36. Bxg7 Kxg7 37. Qd2 a4 38. bxa4 Rxa4 39. h4 b3 40. Qxf4 Rb4 41. Qg4+ Kf6 42. Qd4+ Ke7 43. Qb2 Kf7 44. Qb1 b2 45. h5 Nd3 46. Kh2 Rb3 47. f4 Rc3 48. Qa2 Rc1 49. Qa4 Ke7 50. c5 b1Q 51. cxd6+ cxd6 52. Qa7+ Kf6 53. Qd4+ Kf5 54. g4+ Kxg4 55. Qg7+ Kxh5 56. Qf7+ Kg4 57. Qe6+ Kf3 58. Qh3+ Ke2 59. Qg4+ Kd2 60. Qg2+ Kc3 61. Qg7+ Kc4 0-1

[Event "NED-ch U15"]
[Site "Venlo"]
[Date "2007.05.01"]
[Round "2"]
[White "Otten, Martijn"]
[Black "Ekholm, Robin"]
[Result "1-0"]
[ECO "D37"]
[WhiteElo "1646"]
[PlyCount "69"]
[EventDate "2007.04.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Bf4 e6 5. e3 Nbd7 6. Nf3 Bb4 7. Qc2 0-0 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bg3 N7f6 11. 0-0 Bd7 12. e4 Nb6 13. Bd3 h6 14. Bh4 Be7 15. Rfe1 Rc8 16. Rac1 Nh7 17. Bg3 Ng5 18. Nd2 f6 19. h4 Nf7 20. Nb3 e5 21. dxe5 Nxe5 22. f4 Nf7 23. Rcd1 Qc7 24. Re3 Bd6 25. Qf2 c5 26. Be2 c4 27. Nd4 a6 28. Bh5 Rce8 29. f5 Bxg3 30. Qxg3 Qxg3 31. Rxg3 Re7 32. Nde2 Ne5 33. Nf4 Rc8 34. Ncd5 Nxd5 35. Nxd5 1-0

[Event "NED-ch U15"]
[Site "Venlo"]
[Date "2007.04.30"]
[Round "1"]
[White "Bok, Benjamin"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "C80"]
[WhiteElo "1945"]
[BlackElo "1646"]
[PlyCount "51"]
[EventDate "2007.04.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Nbd2 f5 10. exf6 Nxf6 11. Re1 Qd7 12. Ng5 Nd8 13. Qe2 Ke7 14. Ndf3 c5 15. Nxe6 Nxe6 16. Ng5 Ne4 17. Nxe4 dxe4 18. Qxe4 c4 19. Qxa8 cxb3 20. axb3 Kf7 21. Qf3+ Kg8 22. Qg4 Nc5 23. Qxd7 Nxd7 24. Rxa6 h5 25. Ra7 Nf6 26. Bg5 1-0

[Event "Hengelo U12 op"]
[Site "Hengelo"]
[Date "2005.08.12"]
[Round "10"]
[White "Otten, Martijn"]
[Black "Wijshoff, Kasper"]
[Result "1-0"]
[ECO "D06"]
[WhiteElo "1331"]
[BlackElo "1372"]
[PlyCount "59"]
[EventDate "2005.08.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "CBM 107 Extra"]
[Source "ChessBase"]
[SourceDate "2005.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.09.01"]
[SourceQuality "1"]

1. d4 d5 2. c4 Be6 3. Nc3 Nf6 4. Bf4 Nc6 5. e3 Ne4 6. Nxe4 dxe4 7. d5 Bxd5 8. cxd5 Nb4 9. Qa4+ c6 10. Qxb4 Qxd5 11. Qd4 Qa5+ 12. Qc3 Qd5 13. Bc4 Qf5 14. Qe5 Qxe5 15. Bxe5 e6 16. 0-0-0 Bc5 17. Bxg7 Rg8 18. Be5 b5 19. Be2 a5 20. a3 b4 21. Bd4 Bd6 22. f3 bxa3 23. bxa3 Bxa3+ 24. Bb2 Be7 25. fxe4 a4 26. e5 a3 27. Ba1 Bc5 28. Bd4 Bb4 29. Bf3 c5 30. Bxa8 1-0

[Event "Hengelo U12 op"]
[Site "Hengelo"]
[Date "2005.08.10"]
[Round "5"]
[White "Otten, Martijn"]
[Black "Laan, Kart"]
[Result "1-0"]
[ECO "D06"]
[WhiteElo "1331"]
[BlackElo "1392"]
[PlyCount "58"]
[EventDate "2005.08.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "CBM 107 Extra"]
[Source "ChessBase"]
[SourceDate "2005.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.09.01"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nf6 3. Nc3 Bf5 4. Bf4 e6 5. e3 Bb4 6. Bd3 Bg6 7. Nf3 Nc6 8. 0-0 Bxc3 9. bxc3 Bxd3 10. Qxd3 Ne4 11. cxd5 exd5 12. c4 f5 13. cxd5 Qxd5 14. Bxc7 0-0 15. Qb3 Qxb3 16. axb3 a6 17. Ne5 Nxe5 18. Bxe5 Nd2 19. Rfd1 Ne4 20. f3 Nf6 21. Rac1 Rfc8 22. Rc4 b5 23. Rc5 Nd7 24. Rd5 Nxe5 25. Rxe5 Rc3 26. b4 Kf7 27. Rc5 Ke6 28. Rxc3 Kd5 29. Rc5+ Kd6 1-0

[Event "Hengelo U12 op"]
[Site "Hengelo"]
[Date "2005.08.10"]
[Round "6"]
[White "Warmelink, Evie"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "C30"]
[WhiteElo "1602"]
[BlackElo "1331"]
[PlyCount "75"]
[EventDate "2005.08.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "CBM 107 Extra"]
[Source "ChessBase"]
[SourceDate "2005.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.09.01"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. f4 d6 4. Nf3 Nc6 5. d3 Bg4 6. Be2 Bxf3 7. Bxf3 Be7 8. 0-0 0-0 9. Be3 h6 10. Qd2 Nd4 11. Bxd4 exd4 12. Ne2 c5 13. Rae1 Qd7 14. Ng3 Ng4 15. Nf5 Ne3 16. Nxe3 dxe3 17. Qxe3 Bd8 18. e5 dxe5 19. fxe5 Qe6 20. g3 b5 21. Bxa8 c4 22. d4 a5 23. Qe4 Bb6 24. Bd5 Qd7 25. e6 Qa7 26. exf7+ Kh8 27. Qe8 Bxd4+ 28. Kh1 Bc5 29. Qxb5 c3 30. Re8 cxb2 31. Rxf8+ Bxf8 32. Qxb2 Qa6 33. c4 Qg6 34. Qb8 Qd6 35. Qxd6 Bxd6 36. f8Q+ Bxf8 37. Rxf8+ Kh7 38. Ra8 1-0

[Event "Hengelo U12 op"]
[Site "Hengelo"]
[Date "2005.08.09"]
[Round "2"]
[White "Beukema, Stefan"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "C28"]
[WhiteElo "1603"]
[BlackElo "1331"]
[PlyCount "39"]
[EventDate "2005.08.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "CBM 107 Extra"]
[Source "ChessBase"]
[SourceDate "2005.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.09.01"]
[SourceQuality "1"]

1. e4 e5 2. f4 Nc6 3. Nf3 d6 4. Bc4 Nf6 5. Nc3 Be7 6. d3 0-0 7. Be3 Be6 8. Bxe6 fxe6 9. fxe5 dxe5 10. 0-0 Ng4 11. Qe2 Nd4 12. Bxd4 exd4 13. Nd1 e5 14. h3 Nf6 15. Nxe5 c5 16. Nf2 Qc7 17. Neg4 h5 18. Nxf6+ Bxf6 19. Qxh5 Rfe8 20. Ng4 1-0

[Event "Hengelo U12 op"]
[Site "Hengelo"]
[Date "2005.08.08"]
[Round "1"]
[White "Otten, Martijn"]
[Black "Sikteoeboen, Collin"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "1331"]
[PlyCount "39"]
[EventDate "2005.08.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "CBM 107 Extra"]
[Source "ChessBase"]
[SourceDate "2005.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.09.01"]
[SourceQuality "1"]

1. d4 d6 2. e4 e5 3. d5 Nf6 4. Nc3 c6 5. Bg5 h6 6. Bxf6 gxf6 7. Nf3 f5 8. Bc4 fxe4 9. Nxe4 b5 10. Bb3 Bb7 11. 0-0 cxd5 12. Bxd5 Bxd5 13. Qxd5 Na6 14. Qc6+ Qd7 15. Nf6+ Ke7 16. Nxd7 Bg7 17. Qxa6 Kxd7 18. Rfe1 f6 19. Qb7+ Ke6 20. Nd4# 1-0

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2005.05.07"]
[Round "8"]
[White "Otten, Martijn"]
[Black "Flinkenfluger, Renzo"]
[Result "1-0"]
[ECO "D20"]
[WhiteElo "1335"]
[BlackElo "1529"]
[PlyCount "43"]
[EventDate "2005.05.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. e4 e5 4. d5 Nf6 5. Nc3 Bb4 6. Qa4+ Bd7 7. Qxb4 b6 8. Bxc4 c5 9. Qb3 0-0 10. Nf3 a6 11. Nxe5 Re8 12. f4 b5 13. Be2 c4 14. Qc2 Qe7 15. Be3 Nxe4 16. Nxe4 f6 17. Nxd7 Nxd7 18. Bf3 f5 19. d6 Qe6 20. Nc3 Qxe3+ 21. Ne2 Qxf4 22. Bxa8 1-0

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2005.05.07"]
[Round "7"]
[White "Otten, Martijn"]
[Black "Gunther, Justin"]
[Result "0-1"]
[ECO "D20"]
[WhiteElo "1335"]
[BlackElo "1492"]
[PlyCount "86"]
[EventDate "2005.05.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. e4 b5 4. Bf4 e6 5. Nc3 Bb4 6. Nf3 Nf6 7. Bg5 h6 8. Bh4 g5 9. Bg3 Nxe4 10. Qc2 Bb7 11. a3 Ba5 12. Be5 f6 13. Bg3 Nxg3 14. hxg3 Bxf3 15. gxf3 f5 16. Bg2 Nc6 17. 0-0 Nxd4 18. Qd1 Nb3 19. Qxd8+ Rxd8 20. Rad1 Bxc3 21. bxc3 Ke7 22. Rfe1 Rd6 23. g4 f4 24. Rxd6 cxd6 25. Bf1 Kf6 26. a4 a6 27. Rd1 d5 28. Re1 e5 29. axb5 axb5 30. Rd1 d4 31. cxd4 exd4 32. Bg2 d3 33. Bf1 d2 34. Be2 Re8 35. Kf1 c3 36. Bd3 Nd4 37. Be4 Rxe4 38. Kg2 c2 39. Rh1 d1Q 40. Rxh6+ Kg7 41. Kh2 Nxf3+ 42. Kg2 Kxh6 43. Kh3 Qh1# 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2005.05.07"]
[Round "9"]
[White "Slagter, Jonathan"]
[Black "Otten, Martijn"]
[Result "1/2-1/2"]
[ECO "C46"]
[WhiteElo "1322"]
[BlackElo "1335"]
[PlyCount "132"]
[EventDate "2005.05.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Bc5 4. Nxe5 Bxf2+ 5. Kxf2 Nxe5 6. d3 d6 7. Be2 Nf6 8. Bf4 0-0 9. Rf1 Qe7 10. Kg1 h6 11. Qe1 Nfg4 12. Qg3 Kh8 13. Nd5 Qd7 14. Qh4 c6 15. Nc3 f6 16. Bd2 Ng6 17. Qh5 Kh7 18. h3 N4e5 19. d4 Nf7 20. Bg4 Qe7 21. Bf5 Nfh8 22. Rae1 Qf7 23. Re3 d5 24. Rfe1 a6 25. exd5 Bxf5 26. Qxf5 Rad8 27. Re7 Qg8 28. Rxb7 cxd5 29. Ree7 Rf7 30. Rxf7 Nxf7 31. Qe6 Ng5 32. Qxg8+ Kxg8 33. Bxg5 hxg5 34. Ra7 Rd6 35. Kf2 Nf4 36. Rc7 Rb6 37. b3 Rb4 38. g3 Nxh3+ 39. Ke3 f5 40. Nxd5 f4+ 41. gxf4 gxf4+ 42. Nxf4 Nxf4 43. Kxf4 Rxd4+ 44. Ke3 Rg4 45. Ra7 Rg6 46. c4 Re6+ 47. Kd4 g5 48. Kd5 Rg6 49. c5 g4 50. c6 Rg5+ 51. Ke4 Rc5 52. Rxa6 g3 53. Kf3 Rc3+ 54. Kg2 Kf8 55. Ra8+ Ke7 56. Rg8 Rc1 57. Rxg3 Rc2+ 58. Kh3 Rxa2 59. c7 Kd7 60. Rc3 Kc8 61. Kg4 Ra5 62. Kf4 Ra7 63. Ke5 Rxc7 64. Rxc7+ Kxc7 65. Kd5 Kb6 66. Kc4 Kc6 1/2-1/2

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2005.05.06"]
[Round "4"]
[White "Otte, Pim"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "C51"]
[BlackElo "1335"]
[PlyCount "81"]
[EventDate "2005.05.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Nxb4 5. c3 Nc6 6. d4 Bd6 7. Qb3 Qe7 8. 0-0 Na5 9. Qa4 Nxc4 10. Qxc4 Nf6 11. Bg5 h6 12. Bh4 0-0 13. Nbd2 c6 14. Qd3 Bc7 15. Nc4 d6 16. h3 b5 17. Ne3 Bd7 18. d5 c5 19. c4 b4 20. a3 a5 21. Ra2 Rab8 22. Rb1 Rfe8 23. a4 Rb7 24. Nd2 Reb8 25. Nb3 g5 26. Bg3 Nh5 27. Nf5 Bxf5 28. exf5 f6 29. Qe3 Ng7 30. Qe4 h5 31. f4 h4 32. Bh2 Kf7 33. fxg5 fxg5 34. f6 Qd7 35. Qh7 Kxf6 36. Rf1+ Ke7 37. Qxg7+ Kd8 38. Rf8+ Qe8 39. Rxe8+ Kxe8 40. Rf2 Bd8 41. Rf8# 1-0

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2005.05.06"]
[Round "5"]
[White "Otten, Martijn"]
[Black "Groenewegen, Niels"]
[Result "0-1"]
[ECO "D20"]
[WhiteElo "1335"]
[PlyCount "84"]
[EventDate "2005.05.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. e4 e6 4. Bxc4 c5 5. d5 Nf6 6. Nc3 Be7 7. Nf3 0-0 8. 0-0 b6 9. Nb5 Nxe4 10. Qd3 Nd6 11. dxe6 fxe6 12. Nxd6 Qxd6 13. Qe4 Nc6 14. Bf4 Rxf4 15. Qc2 Nd4 16. Nxd4 Qxd4 17. Bd3 Rh4 18. Rad1 Qf4 19. g3 Qg4 20. f3 Qg5 21. Qg2 Qe3+ 22. Kh1 Rd4 23. Rfe1 Qh6 24. f4 Rb8 25. Qc6 Bb7 26. Qxb7 Rxb7 27. b4 cxb4 28. Bxh7+ Qxh7 29. Rxd4 Rc7 30. Rdd1 Qc2 31. Ra1 Bc5 32. Rac1 Qd3 33. Kg2 Qd5+ 34. Kh3 Rd7 35. Re5 Qxa2 36. Rce1 Rd2 37. Rxe6 Rxh2+ 38. Kg4 Qd5 39. R6e5 Qf7 40. Rf5 Qd7 41. Ree5 Qd1+ 42. Kg5 Qh5# 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2005.05.05"]
[Round "1"]
[White "Busscher, Floris"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "1624"]
[BlackElo "1335"]
[PlyCount "115"]
[EventDate "2005.05.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Bd2 Nxe4 8. Bxb4 Nxb4 9. Bxf7+ Kf8 10. Qb3 Qe7 11. 0-0 a5 12. Bc4 a4 13. Qd1 d5 14. Bd3 Nxd3 15. Qxd3 Bf5 16. Re1 Re8 17. Nc3 Qd7 18. Ne5 Qc8 19. Nxd5 Nf6 20. Qa3+ c5 21. Nf4 b6 22. Qxa4 Qc7 23. g4 Bd7 24. Nxd7+ Nxd7 25. Ne6+ Rxe6 26. Rxe6 Kf7 27. Rae1 Rd8 28. Re7+ Kf8 29. dxc5 Nxc5 30. Rxc7 Nxa4 31. Rb7 Nxb2 32. Rxb6 Nc4 33. Rb4 Na3 34. Rf4+ Kg8 35. Re2 h6 36. Rfe4 Kf8 37. Kg2 Nb5 38. Rc4 Kf7 39. Re3 Kg8 40. Rb3 Na7 41. Rb7 Nb5 42. Rxb5 Rd2 43. a4 Ra2 44. Ra5 Kf7 45. Re4 Rb2 46. Ra7+ Kg6 47. a5 Rb8 48. a6 Kh7 49. Rb7 Ra8 50. a7 h5 51. gxh5 Kh6 52. Re6+ Kh7 53. Ra6 Kg8 54. Rb8+ Rxb8 55. axb8Q+ Kh7 56. h6 g6 57. Qf8 g5 58. Qg7# 1-0

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2005.05.05"]
[Round "3"]
[White "De Cloet, Jeroen M"]
[Black "Otten, Martijn"]
[Result "1-0"]
[ECO "D06"]
[WhiteElo "1575"]
[BlackElo "1335"]
[PlyCount "124"]
[EventDate "2005.05.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 d5 3. Nc3 Bf5 4. e3 e6 5. Nf3 Bd6 6. Bd3 Bg6 7. 0-0 0-0 8. Bxg6 fxg6 9. cxd5 exd5 10. Qb3 b6 11. Nxd5 Bxh2+ 12. Nxh2 Qxd5 13. Qxd5+ Nxd5 14. Bd2 Nc6 15. Rac1 Nce7 16. e4 Nf6 17. f3 Rac8 18. Bb4 Rfe8 19. Rc2 a5 20. Ba3 b5 21. Bc5 Nd7 22. Rfc1 Nxc5 23. Rxc5 c6 24. Ng4 Red8 25. d5 cxd5 26. Rxc8 Nxc8 27. exd5 Ne7 28. Ne3 Rc8 29. Rd1 Rd8 30. Kf2 Kf7 31. f4 Nf5 32. g4 Nxe3 33. Kxe3 Ke7 34. Ke4 Kd6 35. Kd4 Rd7 36. Rc1 h5 37. Rc6+ Ke7 38. Rxg6 h4 39. Rxg7+ Kd6 40. Rxd7+ Kxd7 41. Ke3 Kd6 42. g5 Kxd5 43. Kf3 Ke6 44. Kg4 Kf7 45. Kxh4 Kg6 46. Kg4 a4 47. f5+ Kg7 48. Kh5 b4 49. g6 a3 50. b3 Kg8 51. Kh6 Kf8 52. Kh7 Ke7 53. g7 Kd6 54. g8Q Kc5 55. Qd8 Kb5 56. Qc8 Kb6 57. Kg7 Ka7 58. Kf7 Kb6 59. Ke7 Ka5 60. Qb8 Ka6 61. Kd6 Ka5 62. Kc6 Ka6 1-0

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2005.05.05"]
[Round "2"]
[White "Otten, Martijn"]
[Black "Sedee, Wouter"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "1335"]
[BlackElo "1485"]
[PlyCount "43"]
[EventDate "2005.05.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bf4 Nc6 5. e3 Be7 6. Nf3 0-0 7. Bd3 Re8 8. 0-0 Qd7 9. Re1 b6 10. h3 Bb7 11. a3 Rad8 12. b4 Rb8 13. b5 Na5 14. Ne5 Qd6 15. Bg5 dxc4 16. Bc2 Nd5 17. Nxd5 Qxd5 18. Bxh7+ Kf8 19. e4 Qd8 20. Bxe7+ Qxe7 21. Qg4 Qf6 22. Nd7+ 1-0

