[Event "Prague op"]
[Site "Prague"]
[Date "2024.02.29"]
[Round "2"]
[White "Koffeman, Timotheus"]
[Black "Popovic, Dusan"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "2186"]
[BlackElo "2504"]
[PlyCount "78"]
[EventDate "2024.02.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CB11_2024"]
[SourceDate "2024.03.13"]
[SourceVersion "1"]
[SourceVersionDate "2024.03.13"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 e5 7. Nb3 Be7 8. g4 h6 9. a4 Be6 10. Bg2 Nc6 11. Nd5 Rc8 12. Be3 Bxd5 13. exd5 Na5 14. Nxa5 Qxa5+ 15. Qd2 Qd8 16. Qb4 Qc7 17. 0-0 Nd7 18. a5 Bg5 19. f4 exf4 20. Rxf4 0-0 21. Raf1 Bxf4 22. Qxf4 Ne5 23. Be4 Qe7 24. Bd4 Ng6 25. Qf5 Rce8 26. Bd3 Qh4 27. Kg2 Re1 28. Bf2 Rxf1 29. Bxf1 Qd8 30. b4 Nh4+ 31. Bxh4 Qxh4 32. Bd3 g6 33. Qd7 Qf6 34. Qxb7 Re8 35. Qxa6 Re3 36. Qc4 Qf3+ 37. Kg1 Qg3+ 38. Kh1 Re1+ 39. Bf1 Qf2 0-1

[Event "Vlissingen HZ op 24th"]
[Site "Vlissingen"]
[Date "2022.08.13"]
[Round "9"]
[White "Boeren, Jurriaan"]
[Black "Koffeman, Timotheus"]
[Result "1/2-1/2"]
[ECO "B45"]
[WhiteElo "1840"]
[BlackElo "2119"]
[PlyCount "44"]
[EventDate "2022.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 0-0 11. 0-0 d4 12. Ne2 Bg4 13. f3 Bh5 14. Bg5 Bg6 15. Bh4 Re8 16. Bf2 Bxd3 17. Qxd3 Ne5 18. Qb3 d3 19. Nd4 dxc2 20. Nxc2 Qd3 21. Qxd3 Nxd3 22. Rad1 Nxf2 1/2-1/2

[Event "Vlissingen HZ op 24th"]
[Site "Vlissingen"]
[Date "2022.08.12"]
[Round "8"]
[White "Koffeman, Timotheus"]
[Black "Gosman, Theo"]
[Result "1-0"]
[ECO "C12"]
[WhiteElo "2119"]
[BlackElo "1997"]
[PlyCount "91"]
[EventDate "2022.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Bxc3 7. bxc3 Ne4 8. Ne2 Nxd2 9. Qxd2 c5 10. h4 Nc6 11. Rh3 c4 12. Rg3 Ne7 13. Rxg7 Ng6 14. h5 Kf8 15. Rxg6 fxg6 16. hxg6 Qg5 17. Nf4 Bd7 18. g3 Rg8 19. Qc1 Rxg6 20. Qa3+ Kg7 21. Qd6 Rd8 22. Bh3 Ba4 23. Qxe6 Bxc2 24. Nxg6 Bxg6 25. Qg4 Qe7 26. Qh4 Qa3 27. Qf6+ Kh7 28. Kf1 Rf8 29. Qd6 Rxf2+ 30. Kxf2 Qb2+ 31. Kg1 Qxa1+ 32. Bf1 Qxc3 33. Qd7+ Kg8 34. Qxd5+ Bf7 35. Qd8+ Kg7 36. Qf6+ Kg8 37. Qf4 Qe1 38. Qf2 Qc3 39. Kh2 b5 40. Bh3 Bg6 41. Be6+ Kh7 42. Qf8 Qd2+ 43. Kh3 h5 44. Bg8+ Kh8 45. Bf7+ Kh7 46. Qg8+ 1-0

[Event "Vlissingen HZ op 24th"]
[Site "Vlissingen"]
[Date "2022.08.11"]
[Round "7"]
[White "Sai, Kiran Y"]
[Black "Koffeman, Timotheus"]
[Result "1/2-1/2"]
[ECO "A47"]
[WhiteElo "1879"]
[BlackElo "2119"]
[PlyCount "75"]
[EventDate "2022.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. Bf4 b6 4. e3 Bb7 5. Bd3 c5 6. Nbd2 Nc6 7. c3 Be7 8. e4 cxd4 9. cxd4 Nb4 10. Bb1 d5 11. e5 Ne4 12. a3 Nxd2 13. Nxd2 Nc6 14. Qg4 Nxd4 15. Qxg7 Kd7 16. Be3 Rc8 17. Bxh7 Rxh7 18. Qxh7 Nc2+ 19. Ke2 Ba6+ 20. Kf3 Qc7 21. Rac1 Qxe5 22. g3 Bb7 23. Rxc2 d4+ 24. Ke2 Bxh1 25. Rxc8 dxe3 26. Qh8 Qxh8 27. Rxh8 exd2 28. Kxd2 Bf6 29. Rf8 Ke7 30. Rc8 Be5 31. f4 Bb7 32. Rc2 Bd6 33. h4 e5 34. Ke3 e4 35. b4 a5 36. h5 axb4 37. axb4 Kf6 38. Rb2 1/2-1/2

[Event "Vlissingen HZ op 24th"]
[Site "Vlissingen"]
[Date "2022.08.10"]
[Round "6"]
[White "Koffeman, Timotheus"]
[Black "Dhulipalla, Bala Chandra Prasad"]
[Result "0-1"]
[ECO "C55"]
[WhiteElo "2119"]
[BlackElo "2431"]
[PlyCount "102"]
[EventDate "2022.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 h6 5. Nbd2 d6 6. c3 g6 7. 0-0 Bg7 8. Re1 0-0 9. d4 exd4 10. cxd4 d5 11. Bb5 dxe4 12. Nxe4 Nxe4 13. Rxe4 Qd5 14. Qe2 Bf5 15. Bxc6 Qxc6 16. Re3 Rfe8 17. Bd2 Rxe3 18. Qxe3 Re8 19. Qc3 Qb6 20. Be3 Be4 21. Ne5 Bd5 22. b4 c6 23. a3 Qd8 24. h3 Qh4 25. Re1 a6 26. Qa1 Kh7 27. Qc3 Kg8 28. Qa1 Qh5 29. Bd2 Kh7 30. Qc3 Qf5 31. Re3 h5 32. Re1 Kg8 33. Bc1 f6 34. Nd3 Rxe1+ 35. Nxe1 Qe4 36. Qe3 f5 37. Qxe4 Bxe4 38. Bb2 Kf7 39. Kf1 Bf6 40. Ke2 Ke6 41. f3 Bb1 42. Nd3 Bxd3+ 43. Kxd3 Kd5 44. Bc3 b6 45. g4 Bg7 46. gxh5 gxh5 47. a4 Bf6 48. b5 axb5 49. axb5 c5 50. dxc5 Bxc3 51. Kxc3 Kxc5 0-1

[Event "Vlissingen HZ op 24th"]
[Site "Vlissingen"]
[Date "2022.08.09"]
[Round "5"]
[White "Koffeman, Timotheus"]
[Black "Oosting, Robert"]
[Result "1-0"]
[ECO "B43"]
[WhiteElo "2119"]
[BlackElo "1949"]
[PlyCount "49"]
[EventDate "2022.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 e6 7. g4 Be7 8. Bg2 Qc7 9. 0-0 Nc6 10. Nde2 b5 11. Be3 Bb7 12. Ng3 0-0 13. f4 d5 14. exd5 Nxd5 15. Nxd5 exd5 16. Nf5 Bf6 17. c3 Ne7 18. Nd4 Ng6 19. Qd2 Nh4 20. Bh1 h5 21. Qf2 hxg4 22. hxg4 Ng6 23. g5 Be7 24. f5 Ne5 25. Qh4 1-0

[Event "Vlissingen HZ op 24th"]
[Site "Vlissingen"]
[Date "2022.08.08"]
[Round "4"]
[White "Baklan, Vladimir"]
[Black "Koffeman, Timotheus"]
[Result "1-0"]
[ECO "B45"]
[WhiteElo "2582"]
[BlackElo "2119"]
[PlyCount "85"]
[EventDate "2022.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. g3 Bb4 7. Bg2 0-0 8. 0-0 d6 9. h3 a6 10. Nxc6 bxc6 11. Na4 d5 12. e5 Nd7 13. Qg4 Qe7 14. a3 Ba5 15. Bg5 f6 16. exf6 Nxf6 17. Qe2 e5 18. c4 e4 19. Rac1 h6 20. Be3 Bc7 21. cxd5 cxd5 22. Nb6 Bxb6 23. Bxb6 Re8 24. Qe3 a5 25. Rc7 Qe6 26. Rfc1 Bd7 27. Bd4 Rad8 28. b3 Qd6 29. a4 Nh7 30. h4 Nf8 31. Bh3 Ne6 32. Bxe6+ Qxe6 33. Qc3 Re7 34. Qxa5 Rf8 35. Qb6 Qg4 36. Qd6 Ref7 37. Qxd5 Be6 38. Qe5 Bxb3 39. a5 Qg6 40. h5 Qg4 41. a6 e3 42. Bxe3 Rf5 43. Qd4 1-0

[Event "Vlissingen HZ op 24th"]
[Site "Vlissingen"]
[Date "2022.08.07"]
[Round "3"]
[White "Koffeman, Timotheus"]
[Black "De Zwart, Johan"]
[Result "1-0"]
[ECO "C83"]
[WhiteElo "2119"]
[BlackElo "1970"]
[PlyCount "59"]
[EventDate "2022.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[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. c3 Be7 10. Qe2 0-0 11. Nbd2 Nxd2 12. Bxd2 Na5 13. Bc2 Nc4 14. Bc1 g6 15. Nd4 Qd7 16. Bh6 Rfe8 17. f4 c5 18. f5 cxd4 19. fxe6 Qxe6 20. cxd4 Nxb2 21. Rab1 Nc4 22. Rb3 Bf8 23. Bxf8 Rxf8 24. Rf6 Qd7 25. Rh3 Ra7 26. Qf3 Nd2 27. Qf4 Ne4 28. Qh6 Nxf6 29. exf6 Qxh3 30. Qg7# 1-0

[Event "Vlissingen HZ op 24th"]
[Site "Vlissingen"]
[Date "2022.08.06"]
[Round "1"]
[White "Vermue, Albert"]
[Black "Koffeman, Timotheus"]
[Result "0-1"]
[ECO "B21"]
[WhiteElo "1716"]
[BlackElo "2119"]
[PlyCount "82"]
[EventDate "2022.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 d3 4. Bxd3 Nc6 5. Nf3 d6 6. c4 g6 7. Bd2 Bg7 8. Bc3 Bxc3+ 9. Nxc3 Nf6 10. 0-0 0-0 11. Nd5 e6 12. Nxf6+ Qxf6 13. Qd2 e5 14. b4 b6 15. Rfc1 Bg4 16. Ne1 a5 17. a3 Nd4 18. Rab1 a4 19. Qe3 Rfc8 20. Nc2 Nb3 21. Re1 Rab8 22. f3 Be6 23. Qe2 Qg5 24. Qe3 Qf6 25. Qe2 Rc7 26. Ne3 Rbc8 27. Nd5 Bxd5 28. cxd5 Nd4 29. Qe3 Rc3 30. Qd2 Rxa3 31. Rec1 Rxc1+ 32. Rxc1 Kg7 33. Rc8 Qh4 34. Bf1 Rxf3 35. Rc1 Qxe4 36. Re1 Qf5 37. Qa2 Rb3 38. Qxa4 Rb2 39. Qa1 Qf2+ 40. Kh1 Nf3 41. Be2 Nxe1 0-1

[Event "Dieren op"]
[Site "Dieren"]
[Date "2011.07.28"]
[Round "9"]
[White "Koffeman, Timotheus"]
[Black "Vosselman, Jan M"]
[Result "1/2-1/2"]
[ECO "D11"]
[WhiteElo "2101"]
[BlackElo "2112"]
[PlyCount "26"]
[EventDate "2011.07.19"]
[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 d5 2. Nf3 c6 3. g3 Bf5 4. Bg2 e6 5. 0-0 Nf6 6. Nbd2 Bd6 7. Nh4 Bg6 8. c4 Nbd7 9. b3 0-0 10. Nxg6 hxg6 11. Bb2 Qe7 12. Qc2 Rad8 13. Rad1 Rfe8 1/2-1/2

[Event "Dieren op"]
[Site "Dieren"]
[Date "2011.07.27"]
[Round "8"]
[White "Bakker, Guido"]
[Black "Koffeman, Timotheus"]
[Result "1-0"]
[ECO "C47"]
[WhiteElo "2088"]
[BlackElo "2101"]
[PlyCount "43"]
[EventDate "2011.07.19"]
[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 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. d4 exd4 5. Nxd4 Bb4 6. Nxc6 bxc6 7. Bd3 0-0 8. 0-0 Bxc3 9. bxc3 Qe7 10. Re1 d6 11. Bg5 Qe5 12. Qd2 Re8 13. h3 Rb8 14. f4 Qc5+ 15. Kh2 Nd7 16. Re3 Nf8 17. Bh4 Be6 18. Bf2 Qa5 19. Rg3 f5 20. exf5 Bxf5 21. Rg5 g6 22. Bxf5 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2011.07.26"]
[Round "7"]
[White "Mostertman, Milan"]
[Black "Koffeman, Timotheus"]
[Result "1-0"]
[ECO "B49"]
[WhiteElo "2232"]
[BlackElo "2101"]
[PlyCount "39"]
[EventDate "2011.07.19"]
[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 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 a6 6. Be2 Qc7 7. 0-0 Nf6 8. Be3 Ne5 9. Qd2 b5 10. Bf4 d6 11. f3 Nfd7 12. Kh1 Be7 13. a4 Nc4 14. Ndxb5 axb5 15. Nxb5 Qc5 16. Qc3 e5 17. Qxc4 Qxc4 18. Bxc4 exf4 19. Nc7+ Kd8 20. Nxa8 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2011.07.25"]
[Round "6"]
[White "Koffeman, Timotheus"]
[Black "Partenheimer, Axel"]
[Result "1/2-1/2"]
[ECO "B47"]
[WhiteElo "2101"]
[BlackElo "2206"]
[PlyCount "90"]
[EventDate "2011.07.19"]
[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 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. g3 a6 7. Bg2 d6 8. 0-0 Bd7 9. Re1 Be7 10. Nxc6 Bxc6 11. a4 Nf6 12. Be3 0-0 13. a5 Rae8 14. Qd3 Nd7 15. f4 Rc8 16. Qe2 Rfe8 17. Qf2 Bf8 18. Red1 g6 19. Bd4 e5 20. Be3 exf4 21. Qxf4 Ne5 22. Bh3 Ra8 23. Bb6 Qe7 24. Nd5 Bxd5 25. exd5 f5 26. Rac1 Nf7 27. Qf2 Ng5 28. Bg2 Bh6 29. Rb1 Ne4 30. Bxe4 Qxe4 31. b3 f4 32. c4 fxg3 33. Qxg3 Bf4 34. Qd3 Qe5 35. Qh3 Qg5+ 36. Qg2 Qh5 37. Re1 Re5 38. Rxe5 Qxe5 39. Rf1 Rf8 40. Kh1 Rf5 41. Bg1 g5 42. Qg4 Qe4+ 43. Qg2 Re5 44. Qxe4 Rxe4 45. Rd1 Re8 1/2-1/2

[Event "Dieren op"]
[Site "Dieren"]
[Date "2011.07.23"]
[Round "5"]
[White "Koffeman, Timotheus"]
[Black "Brown, Andrew"]
[Result "0-1"]
[ECO "E81"]
[WhiteElo "2101"]
[BlackElo "2202"]
[PlyCount "48"]
[EventDate "2011.07.19"]
[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. f3 0-0 6. Be3 c5 7. d5 e6 8. Bd3 exd5 9. cxd5 Nbd7 10. Qd2 Ne5 11. Be2 a6 12. a4 Qa5 13. Ra2 Qb4 14. a5 Bd7 15. Nh3 Nc4 16. Bxc4 Qxc4 17. Nf4 Bb5 18. Nfe2 Nd7 19. 0-0 Ne5 20. Rb1 f5 21. b4 fxe4 22. Nxe4 Rxf3 23. Nxd6 Qd3 24. Nc3 Qf1+ 0-1

[Event "Dieren op"]
[Site "Dieren"]
[Date "2011.07.22"]
[Round "4"]
[White "Vogel, Jaap"]
[Black "Koffeman, Timotheus"]
[Result "1/2-1/2"]
[ECO "E18"]
[WhiteElo "2221"]
[BlackElo "2101"]
[PlyCount "27"]
[EventDate "2011.07.19"]
[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. Nf3 e6 3. g3 b6 4. Bg2 Bb7 5. 0-0 Be7 6. c4 0-0 7. Nc3 Ne4 8. Bd2 d5 9. Ne5 Nd7 10. Nxe4 dxe4 11. Bc3 Nxe5 12. dxe5 Qxd1 13. Rfxd1 Rad8 14. Kf1 1/2-1/2

[Event "Dieren op"]
[Site "Dieren"]
[Date "2011.07.21"]
[Round "3"]
[White "Koffeman, Timotheus"]
[Black "Beukema, Stefan"]
[Result "1-0"]
[ECO "E73"]
[WhiteElo "2101"]
[BlackElo "2209"]
[PlyCount "163"]
[EventDate "2011.07.19"]
[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. Bg5 h6 7. Be3 e5 8. d5 Nfd7 9. Qd2 Kh7 10. g4 f5 11. exf5 gxf5 12. h4 Nf6 13. Qc2 Na6 14. Nh3 Kh8 15. g5 Ng8 16. f4 c5 17. a3 e4 18. Kd2 Bd7 19. Rag1 Nc7 20. gxh6 Nxh6 21. Ng5 Rb8 22. b4 b5 23. bxc5 bxc4 24. Rb1 Nb5 25. Nxb5 Bxb5 26. Bxc4 Qa5+ 27. Rb4 dxc5 28. Bxc5 Rfc8 29. Ne6 Rxc5 30. Nxc5 Qxa3 31. Rhb1 Ng4 32. R1b3 e3+ 33. Ke2 Bxc4+ 34. Rxc4 Rxb3 35. Nxb3 Qa6 36. Qd3 Nf2 37. Qc2 Ne4 38. Kxe3 Qg6 39. Qe2 Qg3+ 40. Qf3 Qe1+ 41. Kd3 Qb1+ 42. Ke2 Qb2+ 43. Kf1 Qb1+ 44. Kg2 Qa2+ 45. Kg1 Nf6 46. d6 Qa6 47. Rc6 Qb5 48. Rc5 Qb6 49. Kg2 Qxd6 50. Rxf5 Qc7 51. Nc5 a5 52. Rg5 Qe7 53. Nd3 a4 54. Ne5 Qc7 55. Qa8+ Kh7 56. Qxa4 Qb7+ 57. Kg3 Ne4+ 58. Kg4 Nf6+ 59. Kg3 Ne4+ 60. Kh2 Nxg5 61. hxg5 Qb2+ 62. Kg3 Qc3+ 63. Nf3 Qd3 64. Qe8 Bc3 65. Qf7+ Bg7 66. Qh5+ Kg8 67. g6 Qe4 68. Qg4 Qc6 69. Qf5 Qe8 70. Kg4 Qd8 71. Qe6+ Kh8 72. Ne5 Qd1+ 73. Kg5 Qg1+ 74. Qg4 Qc5 75. Qd7 Qg1+ 76. Kf5 Qb1+ 77. Qd3 Qb4 78. Qd8+ Bf8 79. Qh4+ Bh6 80. Qxh6+ Kg8 81. Qh7+ Kf8 82. Qf7# 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2011.07.20"]
[Round "2"]
[White "Kuipers, Stefan"]
[Black "Koffeman, Timotheus"]
[Result "1-0"]
[ECO "B04"]
[WhiteElo "2365"]
[BlackElo "2101"]
[PlyCount "113"]
[EventDate "2011.07.19"]
[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 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 dxe5 5. Nxe5 c6 6. c4 Nb4 7. Be3 Bf5 8. Nd3 e6 9. Nc3 Nd7 10. a3 Nxd3+ 11. Bxd3 Bxd3 12. Qxd3 Be7 13. 0-0 0-0 14. Rfd1 Nf6 15. Ne4 Qa5 16. b4 Qh5 17. Rab1 a6 18. Nxf6+ Bxf6 19. a4 Rfd8 20. b5 axb5 21. axb5 Qg6 22. Qxg6 hxg6 23. g4 Ra4 24. g5 Be7 25. Rdc1 Rc8 26. bxc6 bxc6 27. Rb7 Kf8 28. Kf1 Ke8 29. h3 Ra5 30. c5 Bd8 31. Bf4 Ra4 32. Rd1 Rca8 33. h4 R8a7 34. Rb8 Ra8 35. Rb7 R8a7 36. Rb8 Ra8 37. Rxa8 Rxa8 38. Rb1 Ra4 39. Be3 Ra7 40. Rb4 Bc7 41. Kg2 Kd7 42. Kf3 Ra2 43. Rb7 Kc8 44. Rb1 e5 45. dxe5 Bxe5 46. Rb6 Kc7 47. Ke4 f6 48. f4 Bc3 49. Rb3 Be1 50. gxf6 gxf6 51. f5 Ra4+ 52. Kf3 gxf5 53. h5 Rh4 54. Bf4+ Kc8 55. Rb8+ Kd7 56. h6 Bc3 57. h7 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2011.07.19"]
[Round "1"]
[White "Koffeman, Timotheus"]
[Black "Odendahl, Reiner"]
[Result "1/2-1/2"]
[ECO "B36"]
[WhiteElo "2101"]
[BlackElo "2375"]
[PlyCount "46"]
[EventDate "2011.07.19"]
[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 c5 3. Nf3 cxd4 4. Nxd4 Nc6 5. Nc3 g6 6. e4 d6 7. Be2 Nxd4 8. Qxd4 Bg7 9. 0-0 0-0 10. Qd3 Bd7 11. Be3 a5 12. Rac1 Bc6 13. f4 Nd7 14. Bf3 Nc5 15. Qc2 a4 16. Rfd1 Qb6 17. Nd5 Bxd5 18. cxd5 Qxb2 19. Bxc5 Qxc2 20. Rxc2 Rfc8 21. e5 b6 22. Bxd6 exd6 23. Re2 Ra7 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.09"]
[Round "9"]
[White "Koffeman, Timotheus"]
[Black "Holland, Remco"]
[Result "0-1"]
[ECO "B21"]
[PlyCount "67"]
[EventDate "2003.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. f4 Nc6 3. Nf3 g6 4. Be2 Bg7 5. 0-0 d6 6. d3 e6 7. c3 Nge7 8. Kh1 0-0 9. Be3 b5 10. Nbd2 b4 11. Qc2 a5 12. a3 bxc3 13. bxc3 Ba6 14. Rab1 Qc7 15. Rfe1 Rab8 16. Bf1 Rxb1 17. Rxb1 Rb8 18. d4 Bxf1 19. Nxf1 cxd4 20. cxd4 Rxb1 21. Qxb1 d5 22. e5 Nf5 23. g4 Nxe3 24. Nxe3 Bf8 25. Qd3 Qb6 26. Kg2 Qb2+ 27. Kg3 Qxa3 28. Qxa3 Bxa3 29. f5 Bb2 30. Nd1 Bxd4 31. Nxd4 Nxd4 32. fxe6 fxe6 33. Nc3 g5 34. h4 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.08"]
[Round "7"]
[White "Koffeman, Timotheus"]
[Black "Ris, Robert"]
[Result "0-1"]
[ECO "B21"]
[BlackElo "2205"]
[PlyCount "82"]
[EventDate "2003.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. f4 Nc6 3. Nf3 g6 4. Be2 Bg7 5. 0-0 d6 6. d3 Nf6 7. c3 Bg4 8. Na3 0-0 9. Nc2 Rb8 10. Ne3 Bxf3 11. Bxf3 Nd7 12. Qc2 e6 13. Kh1 Qc7 14. g4 b5 15. f5 Nce5 16. Bg2 Qb6 17. Qe2 a5 18. g5 Rfc8 19. f6 Bf8 20. Ng4 a4 21. Bf4 Qa5 22. Bxe5 Nxe5 23. Nxe5 dxe5 24. Rac1 a3 25. bxa3 Qxa3 26. Qc2 Ra8 27. Rf2 Rd8 28. Bf1 Ra5 29. Qb2 c4 30. Qxa3 Bxa3 31. Rd1 Bc5 32. Rb2 Be3 33. h4 h6 34. gxh6 Ra3 35. Rxb5 Rxc3 36. h7+ Kxh7 37. Rb7 Kg8 38. Rc7 Rc2 39. Re7 c3 40. Rc7 Rb8 41. Re1 Bd4 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.08"]
[Round "8"]
[White "Rothuis, Vincent"]
[Black "Koffeman, Timotheus"]
[Result "1-0"]
[ECO "B93"]
[PlyCount "71"]
[EventDate "2003.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 g6 7. Be3 Bg7 8. 0-0 0-0 9. Nb3 a6 10. f4 Qc7 11. a4 b6 12. Qe1 e6 13. Rd1 d5 14. Qf2 Rb8 15. e5 Nd7 16. Bg4 f5 17. Bf3 Re8 18. Rd2 Bf8 19. Kh1 Nb4 20. Qg3 Nc5 21. h4 Qf7 22. Qf2 Qc7 23. h5 Nxb3 24. cxb3 Bc5 25. Ne2 Bxe3 26. Qxe3 a5 27. Rc1 Qd7 28. Nd4 Ba6 29. g4 Rbc8 30. Rg1 Kf7 31. gxf5 exf5 32. e6+ Rxe6 33. Nxe6 Qxe6 34. Qxe6+ Kxe6 35. hxg6 hxg6 36. Rxg6+ 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.07"]
[Round "6"]
[White "Rietman, Frits"]
[Black "Koffeman, Timotheus"]
[Result "1/2-1/2"]
[ECO "B38"]
[WhiteElo "2200"]
[PlyCount "45"]
[EventDate "2003.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 d6 5. c4 Nf6 6. Nc3 g6 7. Be2 Bg7 8. Be3 Qa5 9. f3 Nd7 10. Qd2 Nxd4 11. Bxd4 0-0 12. 0-0 Bxd4+ 13. Qxd4 Qb6 14. Qxb6 Nxb6 15. f4 Bd7 16. Rac1 Rac8 17. b3 a5 18. Bf3 Bc6 19. Rce1 Rfd8 20. Nd5 Bxd5 21. exd5 Rc7 22. Bg4 Kg7 23. Re3 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.06"]
[Round "4"]
[White "Koffeman, Timotheus"]
[Black "Hijweegen, Claudia"]
[Result "1-0"]
[ECO "B84"]
[PlyCount "49"]
[EventDate "2003.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. f4 d6 3. Nf3 Nc6 4. Be2 Qc7 5. 0-0 Nf6 6. Nc3 e6 7. Kh1 a6 8. d4 cxd4 9. Nxd4 Bd7 10. Bf3 Rc8 11. f5 Nxd4 12. Qxd4 e5 13. Qf2 b5 14. a3 Bc6 15. Bg5 Nd7 16. Rad1 Be7 17. Bxe7 Kxe7 18. Rd2 Nb6 19. f6+ gxf6 20. Bg4 Rcg8 21. Qxf6+ Kf8 22. Rxd6 Qe7 23. Rxc6 Qxf6 24. Rcxf6 Rxg4 25. Rxb6 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.06"]
[Round "5"]
[White "Koffeman, Timotheus"]
[Black "Leenman, Dennis"]
[Result "1-0"]
[ECO "C26"]
[PlyCount "81"]
[EventDate "2003.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. g3 Nc6 4. Bg2 Bb4 5. Nge2 d6 6. 0-0 0-0 7. h3 h6 8. d3 Nh7 9. f4 Ne7 10. f5 Bc5+ 11. Kh2 Nc6 12. Na4 Bb6 13. Nxb6 axb6 14. Nc3 Nb4 15. a3 Na6 16. Be3 Nc5 17. Qe2 Na4 18. Nxa4 Rxa4 19. g4 b5 20. Qd2 c6 21. Bf3 Qa5 22. c3 Qc7 23. Bd1 Ra8 24. Bb3 Qd8 25. Rf2 Qh4 26. Rg1 Ng5 27. Rg3 Kh8 28. Qe2 Nh7 29. Qf3 Qd8 30. g5 hxg5 31. Qh5 f6 32. Bf7 Rxf7 33. Qxf7 Bd7 34. Qb3 Be8 35. Rfg2 Bh5 36. c4 Bf7 37. Qc2 Qa5 38. h4 gxh4 39. Rxg7 Bh5 40. Qf2 Ng5 41. Bxg5 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.05"]
[Round "2"]
[White "Koffeman, Timotheus"]
[Black "Van Eijk, Sander"]
[Result "0-1"]
[ECO "B21"]
[BlackElo "2233"]
[PlyCount "92"]
[EventDate "2003.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. f4 d5 3. exd5 Nf6 4. Bb5+ Bd7 5. Bxd7+ Qxd7 6. Nc3 Nxd5 7. Nxd5 Qxd5 8. Qf3 Qxf3 9. Nxf3 Nc6 10. 0-0 g6 11. a3 Bg7 12. Rb1 Nd4 13. Nxd4 cxd4 14. d3 Rc8 15. Rf2 0-0 16. Kf1 Rc6 17. Ke1 Rfc8 18. Kd1 Rf6 19. Re2 Rc7 20. Bd2 b6 21. Re4 Rfc6 22. Rc1 h6 23. Be1 g5 24. fxg5 hxg5 25. g4 e6 26. Bg3 Rd7 27. Kd2 f5 28. Re2 f4 29. Bf2 Bf6 30. Rh1 Rh7 31. h3 Kf7 32. Be1 Rc8 33. Reh2 Rch8 34. Ke2 Kg6 35. c4 Rc7 36. Kf3 Rc5 37. Re2 Kf7 38. a4 a5 39. b3 e5 40. Ke4 Ke6 41. Rf2 Rc7 42. Rf3 Rch7 43. Bd2 Be7 44. Rh2 Rh4 45. Be1 Rxg4 46. Bf2 Bd6 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.05"]
[Round "3"]
[White "Van Houwelingen, Iris"]
[Black "Koffeman, Timotheus"]
[Result "1-0"]
[ECO "B34"]
[PlyCount "69"]
[EventDate "2003.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 d6 5. Be3 g6 6. c3 Bg7 7. Be2 Nf6 8. Nd2 a6 9. a4 0-0 10. Nxc6 bxc6 11. a5 Nd7 12. Nc4 c5 13. 0-0 Rb8 14. f4 Qc7 15. Qc2 Bb7 16. Rab1 d5 17. exd5 Bxd5 18. Rfd1 Qc6 19. Bf1 Rfd8 20. Qf2 e6 21. Nb6 Nxb6 22. axb6 Qxb6 23. Bxc5 Qb7 24. Ba7 Ra8 25. Bb6 Rdc8 26. Ra1 Rc6 27. Bd4 Bxd4 28. Rxd4 Rb6 29. b4 Qc7 30. c4 Bc6 31. c5 Rbb8 32. Rxa6 Rxa6 33. Bxa6 Qa7 34. Qe2 Bb5 35. Bxb5 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.04"]
[Round "1"]
[White "Slobbe, Arthur"]
[Black "Koffeman, Timotheus"]
[Result "0-1"]
[ECO "C45"]
[PlyCount "108"]
[EventDate "2003.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. Nc3 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nxc6 bxc6 6. e4 Qf6 7. Qf3 Rb8 8. Rb1 d6 9. Bc4 Bd4 10. Ne2 Be5 11. 0-0 Ne7 12. c3 0-0 13. Bf4 Ng6 14. Be3 Qh4 15. h3 d5 16. Bd3 a5 17. exd5 cxd5 18. Bxg6 hxg6 19. Qxd5 Bd6 20. Qg5 Qxg5 21. Bxg5 Bf5 22. Ra1 Rxb2 23. Nd4 Bd7 24. Rfe1 Re8 25. Reb1 Reb8 26. Re1 f6 27. Bh4 Rd2 28. Red1 Rxd1+ 29. Rxd1 Rb2 30. Ra1 Kf7 31. Bg3 Bxg3 32. fxg3 a4 33. c4 c5 34. Nf3 Be6 35. a3 Rb3 36. Ra2 Bxc4 37. Nd2 Rb1+ 38. Nxb1 Bxa2 39. Nc3 Bb3 40. Kf2 Ke6 41. Ke3 Ke5 42. Kd3 f5 43. Ke3 g5 44. g4 f4+ 45. Kd3 Bd5 46. Nxa4 c4+ 47. Kc3 Bxg2 48. Kxc4 Bxh3 49. Nc5 Bxg4 50. a4 Be2+ 51. Kc3 g4 52. a5 g3 53. Nd3+ Bxd3 54. Kxd3 g2 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.10"]
[Round "9"]
[White "Koffeman, Timotheus"]
[Black "Severijnen, Arjon"]
[Result "1/2-1/2"]
[ECO "B21"]
[PlyCount "64"]
[EventDate "2002.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. f4 e6 3. Nf3 Nc6 4. Bb5 d5 5. exd5 exd5 6. 0-0 Nf6 7. Ne5 Bd7 8. Nxc6 bxc6 9. Be2 Bd6 10. d3 0-0 11. Nd2 Qc7 12. Nb3 Rfe8 13. c4 a5 14. g3 a4 15. Nd2 Re7 16. Bf3 Bf5 17. Nb1 d4 18. Na3 Rae8 19. Nc2 h5 20. Ne1 Bg4 21. Bd2 Bxf3 22. Qxf3 Ng4 23. h3 Ne3 24. Rf2 g6 25. Ng2 Qd7 26. Re1 Nxg2 27. Rxe7 Bxe7 28. Kxg2 h4 29. Qg4 Qxg4 30. hxg4 hxg3 31. Kxg3 Bd6 32. Kh4 Kg7 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.09"]
[Round "8"]
[White "Koekoek, Arjen"]
[Black "Koffeman, Timotheus"]
[Result "1-0"]
[ECO "B07"]
[PlyCount "69"]
[EventDate "2002.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bg5 Bg7 5. Bc4 0-0 6. f3 c6 7. Nge2 Qc7 8. a4 e5 9. d5 Nbd7 10. Qd2 Nb6 11. Bb3 a5 12. Rd1 Ne8 13. 0-0 Kh8 14. f4 f6 15. Bh4 exf4 16. Nd4 g5 17. Bf2 f5 18. Ne6 Bxe6 19. dxe6 Nc8 20. h4 h6 21. hxg5 hxg5 22. Qd3 Ne7 23. Qh3+ Kg8 24. Qh5 fxe4 25. Nxe4 Nf6 26. Nxf6+ Bxf6 27. Bd4 Kg7 28. Qxg5+ Ng6 29. Rxf4 Bxd4+ 30. Rdxd4 d5 31. Rh4 Rh8 32. Rhg4 Rh6 33. Rdf4 Qb6+ 34. Kf1 Rh1+ 35. Ke2 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.09"]
[Round "7"]
[White "Koffeman, Timotheus"]
[Black "Biemans, Erik"]
[Result "1/2-1/2"]
[ECO "C41"]
[PlyCount "42"]
[EventDate "2002.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. Nf3 e5 5. Be2 Be7 6. h3 c6 7. Be3 Qc7 8. Qd2 b5 9. a3 Nb6 10. 0-0 0-0 11. Nh2 a5 12. f3 Nh5 13. f4 Ng3 14. Rf3 Nxe2+ 15. Qxe2 Nc4 16. dxe5 dxe5 17. f5 Nxe3 18. Qxe3 Qa7 19. Qxa7 Rxa7 20. Ng4 f6 21. Rd3 Kf7 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.08"]
[Round "6"]
[White "Tan, Kevin"]
[Black "Koffeman, Timotheus"]
[Result "1-0"]
[ECO "B08"]
[WhiteElo "2221"]
[PlyCount "71"]
[EventDate "2002.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 Bg7 5. Qd2 c6 6. Nf3 b5 7. Bd3 Qc7 8. Bh6 0-0 9. Bxg7 Kxg7 10. 0-0 e5 11. dxe5 dxe5 12. Ne2 h6 13. a4 Bb7 14. Qc3 Nbd7 15. axb5 c5 16. Nd2 Kg8 17. f3 Nb6 18. Nc4 Nfd7 19. b3 Rfe8 20. Na5 Rac8 21. Bc4 Ba8 22. Rfd1 Kg7 23. Rd2 f6 24. Rad1 Nb8 25. Rd6 Rcd8 26. Qd2 Rxd6 27. Qxd6 Qxd6 28. Rxd6 Nc8 29. Rd3 Kf8 30. Nc3 Ke7 31. Bd5 Nb6 32. Bxa8 Nxa8 33. Nd5+ Ke6 34. Nc4 Nd7 35. Nde3 Rb8 36. Rd6+ 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.07"]
[Round "5"]
[White "Koffeman, Timotheus"]
[Black "De Bode, Christian"]
[Result "1-0"]
[ECO "C26"]
[PlyCount "79"]
[EventDate "2002.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. g3 Nc6 4. Bg2 Be7 5. Nge2 d6 6. 0-0 Bg4 7. f3 Bd7 8. d4 0-0 9. Be3 Qc8 10. Qd2 Bh3 11. Rad1 Bxg2 12. Kxg2 exd4 13. Nxd4 Ne5 14. Nf5 Ng6 15. h4 Re8 16. Bg5 h6 17. Nxe7+ Rxe7 18. Bxf6 gxf6 19. Nd5 Kg7 20. h5 Re8 21. hxg6 fxg6 22. Rh1 Rh8 23. Qc3 Rf8 24. Qxc7+ Rf7 25. Qxc8 Rxc8 26. Ne3 Rc6 27. Rd5 a6 28. Rhd1 Rd7 29. f4 Re7 30. Kf3 Rd7 31. a4 Kf7 32. b3 Ke7 33. Nc4 h5 34. e5 b5 35. exf6+ Kxf6 36. Rxd6+ Rdxd6 37. Rxd6+ Rxd6 38. Nxd6 Ke6 39. axb5 axb5 40. Nxb5 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.07"]
[Round "4"]
[White "Konijn, Rob"]
[Black "Koffeman, Timotheus"]
[Result "1/2-1/2"]
[ECO "B09"]
[PlyCount "55"]
[EventDate "2002.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 0-0 6. Be2 c6 7. 0-0 b5 8. e5 Nfd7 9. Qe1 Qb6 10. Kh1 b4 11. Ne4 c5 12. Be3 Bb7 13. dxc5 dxc5 14. Neg5 Bd5 15. Rd1 e6 16. Nd2 Qc6 17. Bf3 Nb6 18. Qh4 h6 19. Nge4 N8d7 20. Nf6+ Nxf6 21. exf6 Bh8 22. Nb3 Nd7 23. Bxd5 exd5 24. Qxh6 Bxf6 25. f5 Bg7 26. Qg5 d4 27. Bc1 Rae8 28. Rde1 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.06"]
[Round "3"]
[White "Koffeman, Timotheus"]
[Black "In't Groen, Erik"]
[Result "1-0"]
[ECO "B21"]
[PlyCount "113"]
[EventDate "2002.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. f4 d6 3. Nf3 Nc6 4. Bb5 Bd7 5. 0-0 a6 6. Be2 Nf6 7. Nc3 e6 8. d3 Be7 9. Kh1 0-0 10. Be3 b5 11. Qd2 Qb6 12. e5 dxe5 13. Nxe5 Nxe5 14. fxe5 Nd5 15. Bf2 Nxc3 16. Qxc3 Rac8 17. b4 Qc7 18. bxc5 Bxc5 19. Bf3 Be7 20. Qxc7 Rxc7 21. Bd1 Bc6 22. Bd4 Rd7 23. Bb2 Bd5 24. Bf3 Rc8 25. Rf2 Bh4 26. Re2 Bxf3 27. gxf3 Rdc7 28. c3 Rd7 29. Re4 Be7 30. Rd1 Rcd8 31. d4 Rc7 32. Re2 Rc4 33. Rd3 b4 34. cxb4 Rxb4 35. Ba3 Rb1+ 36. Kg2 Kf8 37. Rc2 Rdb8 38. Rc7 Bxa3 39. Rxa3 R8b2+ 40. Kg3 Ra1 41. Rxa6 Rbxa2 42. Rb6 Rg1+ 43. Kh3 g5 44. Rb8+ Kg7 45. Rbb7 g4+ 46. fxg4 Rf2 47. Re7 Kg6 48. Re8 Rf3+ 49. Kh4 Kh6 50. Rg8 Rf4 51. h3 Rg2 52. Rd7 Rg1 53. d5 exd5 54. Rd6+ f6 55. Rxf6+ Rxf6 56. exf6 Rf1 57. g5# 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.06"]
[Round "2"]
[White "Tates, Thomas"]
[Black "Koffeman, Timotheus"]
[Result "0-1"]
[ECO "A43"]
[PlyCount "54"]
[EventDate "2002.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 0-0 6. Be2 c5 7. d5 b5 8. e5 dxe5 9. fxe5 Ng4 10. Bf4 Bb7 11. Bxb5 Qb6 12. Qd2 a6 13. Ba4 f6 14. e6 Ne5 15. Bxe5 fxe5 16. 0-0 Rf4 17. Rae1 Bh6 18. Qe2 e4 19. Ne5 Qxb2 20. Rxf4 Bxf4 21. Qf2 Qxc3 22. Rxe4 Qa1+ 23. Re1 Qd4 24. d6 Qxf2+ 25. Kxf2 Bxe5 26. dxe7 Bd4+ 27. Kf1 Nc6 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.05"]
[Round "1"]
[White "Koffeman, Timotheus"]
[Black "Bensdorp, Marlies"]
[Result "0-1"]
[ECO "C01"]
[BlackElo "2117"]
[PlyCount "87"]
[EventDate "2002.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Bd3 Nc6 5. Ne2 Bg4 6. f3 Bh5 7. c3 Nf6 8. 0-0 Bg6 9. Re1 Qd7 10. b4 Be7 11. a4 0-0 12. Bg5 Bxd3 13. Qxd3 h6 14. Bh4 Rfe8 15. Nd2 a5 16. b5 Nd8 17. Nf1 Ne6 18. Ne3 g6 19. Bg3 Nh5 20. Be5 Kh7 21. g4 Nhg7 22. Bg3 c6 23. bxc6 bxc6 24. Kf2 Bd6 25. f4 Qc7 26. Kf3 Rf8 27. h4 f5 28. g5 Nh5 29. Ng2 hxg5 30. hxg5 Nxg5+ 31. fxg5 Bxg3 32. Rh1 Bh2 33. Kf2 Kg7 34. Qf3 Rae8 35. Rae1 Re4 36. Rb1 Rfe8 37. Rb2 Rxe2+ 38. Rxe2 Rxe2+ 39. Qxe2 Ng3 40. Qe1 Nxh1+ 41. Qxh1 Qg3+ 42. Ke2 Qg4+ 43. Ke3 Qe4+ 44. Kd2 0-1

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.12"]
[Round "9"]
[White "Konken, Fabian"]
[Black "Koffeman, Timotheus"]
[Result "1-0"]
[ECO "A38"]
[PlyCount "79"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 c5 3. Nf3 Nc6 4. g3 g6 5. Bg2 Bg7 6. 0-0 d6 7. d4 Nd7 8. e3 0-0 9. b3 h6 10. Bb2 cxd4 11. Nxd4 Nde5 12. Qd2 Nxd4 13. exd4 Nc6 14. Nd5 e6 15. Ne3 Re8 16. d5 exd5 17. Nxd5 Be6 18. Bxg7 Kxg7 19. Rad1 Bxd5 20. Bxd5 Rc8 21. Bg2 Re6 22. Rfe1 Rxe1+ 23. Rxe1 Qf6 24. Rd1 Rd8 25. b4 Qe7 26. a4 Qc7 27. Bd5 a5 28. Bxc6 Qxc6 29. Qd4+ Kg8 30. b5 Qf3 31. c5 d5 32. c6 bxc6 33. bxc6 Rc8 34. Re1 Qa3 35. Qxd5 Qxa4 36. c7 Qb4 37. Kf1 a4 38. Qd8+ Qf8 39. Rd1 Kg7 40. Qxf8+ 1-0

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.11"]
[Round "8"]
[White "Koffeman, Timotheus"]
[Black "Bax, Frank"]
[Result "1/2-1/2"]
[ECO "C29"]
[PlyCount "81"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. exd5 Nxd5 5. Nxd5 Qxd5 6. fxe5 Nc6 7. Qf3 Qxe5+ 8. Qe2 Qxe2+ 9. Bxe2 Nd4 10. Bd3 c5 11. b3 Bg4 12. h3 Bh5 13. g4 Bg6 14. Bxg6 hxg6 15. Kd1 0-0-0 16. Bb2 Bd6 17. Ne2 Nxe2 18. Kxe2 Rhe8+ 19. Kf3 Be5 20. Bxe5 Rxe5 21. d3 Rde8 22. Rh2 Kd7 23. Rg1 Re3+ 24. Kf4 f6 25. h4 R8e5 26. g5 f5 27. Rg3 Re2 28. Rgg2 Rxg2 29. Rxg2 Kd6 30. Rh2 Ke6 31. Rd2 Re1 32. Rf2 b6 33. a4 a6 34. Rh2 b5 35. axb5 axb5 36. Rd2 Kd5 37. c4+ bxc4 38. dxc4+ Kc6 39. Ra2 Re4+ 40. Kf3 Kb6 41. Rd2 1/2-1/2

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.11"]
[Round "7"]
[White "Van Zutphen, Jimmy"]
[Black "Koffeman, Timotheus"]
[Result "1/2-1/2"]
[ECO "C30"]
[PlyCount "47"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. Nc3 e5 2. e4 Nc6 3. f4 Bc5 4. Nf3 d6 5. Na4 Bb6 6. Nxb6 axb6 7. Bb5 Bg4 8. 0-0 Nf6 9. d3 h6 10. f5 0-0 11. Bxc6 bxc6 12. h3 Bxf3 13. Qxf3 d5 14. c3 c5 15. b3 Qd7 16. g4 dxe4 17. dxe4 c4 18. g5 hxg5 19. Bxg5 Qd3 20. Qxd3 cxd3 21. Bxf6 gxf6 22. Rfd1 Rfd8 23. Rd2 c5 24. Rad1 1/2-1/2

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.10"]
[Round "6"]
[White "Koffeman, Timotheus"]
[Black "Knol, Geon"]
[Result "1-0"]
[ECO "C29"]
[PlyCount "55"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. f4 Bb4 4. fxe5 Bxc3 5. dxc3 Nxe4 6. Qg4 d5 7. Qxg7 Rf8 8. Bh6 Nd7 9. 0-0-0 Nf2 10. Rxd5 Nxh1 11. Bg5 f6 12. Be2 Qe7 13. Bh5+ Kd8 14. exf6 Qe1+ 15. Rd1 Qxd1+ 16. Kxd1 c6 17. Qe7+ Kc7 18. Bf4+ Kb6 19. Qb4+ Ka6 20. Be2+ b5 21. a4 Kb6 22. Qd6 Rxf6 23. Qc7+ Ka6 24. axb5+ cxb5 25. b4 Nb6 26. Bf3 Re6 27. Nh3 Nc4 28. Bxa8 1-0

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.09"]
[Round "5"]
[White "De Hoop, Thomas"]
[Black "Koffeman, Timotheus"]
[Result "0-1"]
[ECO "B02"]
[PlyCount "68"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5 Nd5 5. Bc4 c6 6. Qb3 e6 7. d4 b6 8. cxb6 axb6 9. Nc3 Bb4 10. Bd2 Bxc3 11. bxc3 0-0 12. Nf3 Ba6 13. Bxa6 Nxa6 14. Rb1 b5 15. Qc2 f6 16. h4 Qe8 17. h5 fxe5 18. Ng5 e4 19. Nxe4 Qf7 20. Rh3 Qf5 21. Bg5 Nf4 22. Bxf4 Qxf4 23. Rg3 Nc7 24. Qe2 Nd5 25. Nc5 Nxc3 26. Rxc3 Qxd4 27. Rbc1 Rf5 28. Nd3 Qh4 29. R3c2 Ra4 30. g3 Qh1+ 31. Kd2 Qd5 32. g4 Rf3 33. Qe5 Qxd3+ 34. Ke1 Re4+ 0-1

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.09"]
[Round "4"]
[White "Koffeman, Timotheus"]
[Black "De Boer, Richard"]
[Result "1-0"]
[ECO "B26"]
[PlyCount "79"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. g3 Nf6 4. Bg2 d6 5. d3 g6 6. Be3 Bg7 7. Qd2 Ng4 8. h3 Nxe3 9. fxe3 Qb6 10. Rb1 Be6 11. Nge2 0-0 12. 0-0 Qa5 13. a3 b5 14. e5 Rac8 15. exd6 exd6 16. b4 cxb4 17. axb4 Nxb4 18. d4 Bc4 19. Rf2 Na2 20. Ra1 Bxe2 21. Rxe2 Rxc3 22. Bd5 Ra3 23. Qxa5 Rxa5 24. Bxa2 Re8 25. Bxf7+ Kxf7 26. Rxa5 Bxd4 27. Rxb5 Bxe3+ 28. Kg2 Bc5 29. Rb7+ Kf8 30. Rxe8+ Kxe8 31. Rxh7 Kf8 32. Kf3 Bd4 33. Ke4 Bg7 34. Kd5 Kg8 35. Rh4 Be5 36. Ra4 Bxg3 37. Rxa7 Be5 38. Rd7 Kf8 39. c4 g5 40. c5 1-0

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.08"]
[Round "3"]
[White "Duijker, Rick"]
[Black "Koffeman, Timotheus"]
[Result "1-0"]
[ECO "B02"]
[PlyCount "82"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 Nf6 2. Nc3 d5 3. e5 Ne4 4. Nce2 d4 5. c3 Nc5 6. Nxd4 Bd7 7. Ngf3 Nc6 8. Nxc6 Bxc6 9. d4 Ne6 10. Bd3 g6 11. 0-0 Bg7 12. Re1 0-0 13. Ng5 Nxg5 14. Bxg5 f6 15. exf6 exf6 16. Bf4 Qd7 17. Qd2 Rae8 18. Bc4+ Kh8 19. f3 b6 20. Rxe8 Rxe8 21. Re1 Rxe1+ 22. Qxe1 Bf8 23. Qe6 Qxe6 24. Bxe6 Bd6 25. Bxd6 cxd6 26. Kf2 Kg7 27. Ke3 f5 28. g3 Kf6 29. d5 Be8 30. f4 h6 31. c4 g5 32. b4 Bg6 33. Kd4 Ke7 34. a4 Kd8 35. a5 g4 36. axb6 axb6 37. c5 bxc5+ 38. bxc5 Kc7 39. Kc4 h5 40. cxd6+ Kxd6 41. Kd4 Ke7 1-0

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.08"]
[Round "2"]
[White "Koffeman, Timotheus"]
[Black "Van Ruitenburg, Joost"]
[Result "0-1"]
[ECO "C27"]
[PlyCount "172"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Qxe5+ Qe7 6. Qxe7+ Bxe7 7. Bb3 0-0 8. Nd5 Bd8 9. Nf3 a5 10. c3 b5 11. d4 Bb7 12. Ne3 Bxf3 13. gxf3 a4 14. Bc2 Re8 15. Kf1 Nc6 16. Nf5 Nc4 17. Rg1 g6 18. Nh6+ Kg7 19. Nf5+ Kg8 20. Nh6+ Kf8 21. Nf5 Bf6 22. Ne3 N6a5 23. Nd5 Bd8 24. b3 axb3 25. axb3 c6 26. Bh6+ Kg8 27. bxc4 cxd5 28. cxb5 Bc7 29. Rh1 Nc4 30. Kg2 Ba5 31. Rhe1 Rxe1 32. Rxe1 Bxc3 33. Re7 Nb6 34. Bb3 Bxd4 35. Bxd5 Nxd5 36. Rxd7 Nc3 37. Rxd4 Nxb5 38. Rd7 Na7 39. Rc7 Nc8 40. Rd7 Nb6 41. Rd6 Nc4 42. Rd5 Re8 43. Kg3 Nb6 44. Rb5 Nc8 45. Rb8 Nd6 46. Rxe8+ Nxe8 47. Kf4 Nd6 48. Ke5 Nf5 49. Bg5 h6 50. Bf6 Kf8 51. Kd5 Kg8 52. Ke5 Kh7 53. h4 h5 54. Bg5 Kg7 55. Bf6+ Kg8 56. Kd5 Kf8 57. Ke5 Nh6 58. Bg5 Ng8 59. Bf6 Nh6 60. Bg5 Nf5 61. Bf6 Kg8 62. Bg5 Ng7 63. Bf6 Ne6 64. Be7 Kg7 65. f4 Nc7 66. f5 gxf5 67. Kxf5 Nd5 68. Bg5 f6 69. Bd2 Kf7 70. Bc1 Ne7+ 71. Ke4 Ng6 72. Bb2 Nxh4 73. Kf4 Ng6+ 74. Kf5 Ne7+ 75. Kf4 Kg6 76. f3 Nd5+ 77. Kg3 Nc7 78. Kh4 Ne8 79. Bc1 Nd6 80. Bb2 Nf5+ 81. Kh3 Ne3 82. Kh4 f5 83. Bc1 Ng2+ 84. Kg3 Ne1 85. Be3 h4+ 86. Kxh4 Ng2+ 0-1

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.07"]
[Round "1"]
[White "Van Beek, Alexander"]
[Black "Koffeman, Timotheus"]
[Result "0-1"]
[ECO "B04"]
[WhiteElo "2270"]
[PlyCount "122"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 g6 5. Bc4 Nb6 6. Bb3 Bg7 7. Ng5 e6 8. f4 h6 9. Nf3 Nc6 10. 0-0 Na5 11. Nc3 Nxb3 12. cxb3 0-0 13. Bd2 Bd7 14. Qe2 Bc6 15. b4 Bd5 16. Rfd1 c6 17. Be1 Bxf3 18. Qxf3 Nd5 19. Ne4 dxe5 20. fxe5 Qb6 21. Nc5 Qc7 22. Rac1 a6 23. a4 Rfd8 24. b5 axb5 25. axb5 Qb6 26. bxc6 bxc6 27. Rc2 Ra7 28. Bf2 Rda8 29. h4 Ra1 30. h5 g5 31. Kh2 Rxd1 32. Qxd1 Ra2 33. Qc1 Nf4 34. g3 Nd5 35. Ne4 Qb3 36. Nd2 Qb4 37. Nc4 Qb3 38. Nd2 Qb4 39. Kg2 Qb5 40. Ne4 Qb3 41. Nd6 g4 42. Rxc6 Rxb2 43. Rc8+ Bf8 44. Qe1 Qf3+ 45. Kg1 Re2 46. Qf1 Ne3 47. Rc3 Rxf2 48. Qxf2 Qxf2+ 49. Kxf2 Nd1+ 50. Ke2 Nxc3+ 51. Kd3 Nd5 52. Ne4 Kg7 53. Nf2 f5 54. exf6+ Nxf6 55. Ke3 Bd6 56. Nh1 Nxh5 57. Kf2 Kf6 58. Kg2 Kf5 59. Kh2 Bxg3+ 60. Nxg3+ Nxg3 61. Kxg3 h5 0-1

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.14"]
[Round "9"]
[White "Koffeman, Timotheus"]
[Black "Andriessen, Marc"]
[Result "1/2-1/2"]
[ECO "C01"]
[PlyCount "139"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nc3 Nf6 5. Bg5 Be7 6. Nf3 Nc6 7. Bb5 Bd7 8. Bxf6 Bxf6 9. Nxd5 0-0 10. 0-0 Nxd4 11. Bxd7 Nxf3+ 12. Qxf3 Qxd7 13. Nxf6+ gxf6 14. Qxf6 Qd6 15. Qxd6 cxd6 16. Rad1 Rfd8 17. Rfe1 Rd7 18. Re4 Rc8 19. c3 a6 20. Rde1 Kg7 21. Re7 Rcd8 22. R1e4 Kf8 23. Rxd7 Rxd7 24. Kf1 d5 25. Rd4 f5 26. c4 Ke7 27. cxd5 Kf6 28. f4 Ke7 29. b4 Kd6 30. Ke2 Rg7 31. g3 Rc7 32. Kd2 h5 33. a4 b5 34. axb5 axb5 35. Ke3 Rc2 36. h3 Rc3+ 37. Kf2 Rc2+ 38. Ke1 Rg2 39. Rd3 Rh2 40. g4 hxg4 41. hxg4 fxg4 42. f5 Rb2 43. Rd4 g3 44. Kf1 Rf2+ 45. Kg1 Rxf5 46. Rg4 Rf3 47. Kg2 Rb3 48. Rg5 Rxb4 49. Kxg3 Rd4 50. Kf3 Rxd5 51. Rg4 Kc5 52. Ke3 b4 53. Rg2 Kc4 54. Rg8 Rd3+ 55. Ke2 Rc3 56. Kd2 Kb3 57. Rb8 Rh3 58. Kc1 Rh2 59. Rb7 Rh4 60. Rb8 Rc4+ 61. Kb1 Kc3 62. Ka2 Kc2 63. Rh8 Rc3 64. Rh2+ Kd3 65. Kb2 Rc4 66. Rh3+ Kd4 67. Rh4+ Kc5 68. Rxc4+ Kxc4 69. Kc2 Kb5 70. Kb2 1/2-1/2

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.13"]
[Round "8"]
[White "Koffeman, Timotheus"]
[Black "Zoutman, Floris"]
[Result "0-1"]
[ECO "B02"]
[PlyCount "70"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. Bc4 Nb6 4. Bb3 Nc6 5. Nf3 d6 6. exd6 cxd6 7. d4 Bg4 8. Bxf7+ Kd7 9. c3 Kc7 10. h3 Bxf3 11. Qxf3 Qd7 12. Bb3 e6 13. 0-0 g6 14. Bf4 Bg7 15. Na3 a6 16. Nc4 Nxc4 17. Bxc4 Rhf8 18. Qg3 e5 19. dxe5 Nxe5 20. Be2 Qf5 21. Bxe5 Bxe5 22. Qd3 Rae8 23. Qc4+ Kb8 24. Bg4 Qc2 25. Qb3 Qd2 26. Qb4 Rf4 27. Qb3 Ref8 28. Qb6 h5 29. Rad1 Qc2 30. Bf3 Rxf3 31. gxf3 Qf5 32. Rfe1 Qxf3 33. Qe3 Qf5 34. Rd3 g5 35. Qe4 Qxf2+ 0-1

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.13"]
[Round "7"]
[White "Soeteman, Jeroen"]
[Black "Koffeman, Timotheus"]
[Result "1-0"]
[ECO "B02"]
[PlyCount "39"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 Nf6 2. Nc3 d5 3. e5 Ne4 4. Nxe4 dxe4 5. f3 Bf5 6. f4 Nc6 7. Bb5 Qd7 8. h3 h5 9. Ne2 h4 10. c3 e3 11. Nd4 0-0-0 12. Nxc6 exd2+ 13. Bxd2 Qxd2+ 14. Qxd2 Rxd2 15. Kxd2 bxc6 16. Bxc6 g6 17. Ke2 Bh6 18. Kf3 Rd8 19. Rad1 Bg7 20. Bb7+ 1-0

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.12"]
[Round "6"]
[White "Koffeman, Timotheus"]
[Black "Paulis, Winifred"]
[Result "0-1"]
[ECO "B21"]
[PlyCount "106"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. f4 d6 3. Nf3 Nc6 4. Bb5 Bd7 5. 0-0 a6 6. Be2 g6 7. d3 Bg7 8. c3 Nf6 9. Be3 0-0 10. h3 Qc7 11. Nbd2 b6 12. Qe1 Rfe8 13. g4 Rad8 14. Nh4 h6 15. Qf2 Rf8 16. Nhf3 Bxg4 17. Qg2 Bh5 18. Rac1 Qb8 19. Kh1 Kh8 20. Ng1 e6 21. Nc4 Bxe2 22. Nxe2 Nh5 23. Nd2 Ne7 24. Ng3 Nxg3+ 25. Qxg3 d5 26. Nb3 Qb7 27. Qf3 dxe4 28. dxe4 f5 29. e5 Qxf3+ 30. Rxf3 Rd3 31. Kg2 Nd5 32. Bxc5 bxc5 33. Nxc5 Rd2+ 34. Kg3 Rxb2 35. Nxe6 Re8 36. Nxg7 Kxg7 37. c4 Ne7 38. Ra3 Rb6 39. Rd1 Rc6 40. Rd6 Rxc4 41. Raxa6 Rc3+ 42. Kg2 Rc2+ 43. Kg3 Rec8 44. Ra7 R8c7 45. Rd7 Rxd7 46. Rxd7 Kf8 47. a4 Rc3+ 48. Kg2 Ra3 49. Ra7 Nd5 50. a5 Nxf4+ 51. Kf1 Ra1+ 52. Kf2 Nd3+ 53. Kg3 Nxe5 0-1

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.11"]
[Round "5"]
[White "De Bruijn, Edwin"]
[Black "Koffeman, Timotheus"]
[Result "0-1"]
[ECO "B05"]
[PlyCount "132"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e5 3. Nf3 d6 4. e3 Bg4 5. Be2 Nc6 6. d4 exd4 7. exd4 Be7 8. 0-0 0-0 9. h3 Bh5 10. Re1 Re8 11. Be3 Bf8 12. Nh4 Bxe2 13. Rxe2 d5 14. c5 b6 15. cxb6 cxb6 16. a3 Ne4 17. Nf3 Nxc3 18. bxc3 Rc8 19. Rc2 Na5 20. Nd2 Re6 21. Nf3 Nc4 22. Bc1 Qd7 23. Re2 Rxe2 24. Qxe2 Re8 25. Qd3 Bd6 26. Kf1 Qe7 27. a4 h6 28. Ra2 Qd7 29. Nd2 Nxd2+ 30. Bxd2 Rc8 31. Qb5 Qc6 32. Qxc6 Rxc6 33. Ke1 Kf8 34. Ke2 Ke7 35. Kd3 Rc4 36. Be3 f5 37. f4 Kf6 38. Bd2 g5 39. fxg5+ hxg5 40. Bc1 f4 41. Bd2 Kf5 42. Be1 g4 43. hxg4+ Kxg4 44. Bf2 Be7 45. Kc2 Bh4 46. Bxh4 Kxh4 47. Kb3 a5 48. Rd2 Kg3 49. Re2 Rc6 50. Kc2 b5 51. axb5 Rb6 52. Kd3 Rxb5 53. Ra2 a4 54. Rxa4 Kxg2 55. c4 Rb3+ 56. Kc2 Re3 57. Kd2 Re4 58. cxd5 f3 59. Kd3 Re8 60. Ra2+ f2 61. d6 Kg1 62. Ra1+ Re1 63. d7 f1Q+ 64. Kc3 Rc1+ 65. Kd2 Qe1+ 66. Kd3 Rc3# 0-1

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.11"]
[Round "4"]
[White "Koffeman, Timotheus"]
[Black "Overbeeke, Pim"]
[Result "1/2-1/2"]
[ECO "B02"]
[PlyCount "79"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. Nc3 Nxd5 4. Bc4 Nxc3 5. bxc3 e6 6. Nf3 Bd6 7. 0-0 Nd7 8. d4 Nf6 9. Re1 c6 10. Bg5 0-0 11. Ne5 Be7 12. Bd3 Nd5 13. Qh5 f5 14. Bxe7 Qxe7 15. c4 Nf6 16. Qh4 Qd6 17. Nf3 b6 18. Re2 Bd7 19. Rae1 Rae8 20. Re5 c5 21. dxc5 bxc5 22. h3 h6 23. Qf4 g5 24. Qe3 Rc8 25. Rb1 Rfe8 26. g3 Bc6 27. Re1 Kg7 28. Rxc5 Red8 29. Re5 Re8 30. Nd4 Be4 31. f4 Nd7 32. Bxe4 Nxe5 33. fxe5 Qxe5 34. Bd3 Qxe3+ 35. Rxe3 Kf6 36. Nb5 Re7 37. Kf2 a6 38. Nc3 Rec7 39. Na4 Rc6 40. Nc3 1/2-1/2

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.10"]
[Round "3"]
[White "Biemans, Erik"]
[Black "Koffeman, Timotheus"]
[Result "1/2-1/2"]
[ECO "B04"]
[PlyCount "104"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. d4 d6 5. exd6 cxd6 6. Nc3 g6 7. Be3 Bg7 8. Nf3 0-0 9. Qd2 Nc6 10. Bh6 Re8 11. Bxg7 Kxg7 12. Be2 e5 13. d5 Ne7 14. 0-0 Nf5 15. b3 e4 16. Nd4 Qf6 17. Nxf5+ gxf5 18. Nb5 Rg8 19. Qd4 Qxd4 20. Nxd4 Bd7 21. f3 Rae8 22. Rae1 f4 23. fxe4 Rxe4 24. Nc2 Bf5 25. Na3 Rge8 26. Rf2 Bg4 27. Kf1 a6 28. Nc2 Bxe2+ 29. Rfxe2 Rxe2 30. Rxe2 Rxe2 31. Kxe2 Kf6 32. Kf3 Ke5 33. Ne1 Kd4 34. Kxf4 Kc3 35. Kg5 Kb2 36. Kh6 Kxa2 37. Kxh7 Kxb3 38. h4 a5 39. Kg8 a4 40. h5 a3 41. h6 a2 42. h7 a1Q 43. h8Q Qxh8+ 44. Kxh8 Kxc4 45. Kg7 f5 46. Kf6 f4 47. Ke6 Nxd5 48. Kxd6 Ne3 49. Ke5 b5 50. Kxf4 Nxg2+ 51. Nxg2 b4 52. Ne3+ Kc3 1/2-1/2

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.10"]
[Round "2"]
[White "Koffeman, Timotheus"]
[Black "Muhren, Willem"]
[Result "0-1"]
[ECO "B21"]
[PlyCount "70"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. f4 d5 3. exd5 Qxd5 4. Nc3 Qd8 5. Nf3 Nc6 6. Bb5 Bd7 7. d3 a6 8. Bxc6 Bxc6 9. Be3 b6 10. 0-0 Nf6 11. Qe2 e6 12. Rad1 Qc7 13. f5 Bd7 14. Ng5 Bd6 15. fxe6 Bxh2+ 16. Kh1 Bxe6 17. Nxe6 fxe6 18. Rxf6 gxf6 19. Qh5+ Ke7 20. Qxh2 Qxh2+ 21. Kxh2 Rhg8 22. Rf1 Rg6 23. Rf2 Rag8 24. Na4 Rb8 25. Rf3 Kd6 26. Rg3 e5 27. b4 cxb4 28. Nxb6 f5 29. Rxg6+ hxg6 30. Nc4+ Kd5 31. Kg1 e4 32. Kf2 exd3 33. cxd3 b3 34. Nb6+ Rxb6 35. axb3 Rxb3 0-1

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.09"]
[Round "1"]
[White "Kranenburg, Leo"]
[Black "Koffeman, Timotheus"]
[Result "0-1"]
[ECO "B02"]
[PlyCount "112"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 Nf6 2. Nc3 d5 3. e5 Ne4 4. Nxe4 dxe4 5. d4 exd3 6. Qxd3 Qxd3 7. Bxd3 Nc6 8. f4 Bd7 9. Bd2 0-0-0 10. 0-0-0 g6 11. Bc3 Rg8 12. Nf3 Bg4 13. Be4 Bh6 14. g3 Rxd1+ 15. Rxd1 Re8 16. h3 Bd7 17. Nd4 Nxe5 18. Nb3 Nc6 19. Nc5 Rd8 20. b4 Be8 21. Rxd8+ Nxd8 22. Bd4 f6 23. Bd5 Bf7 24. Bxf7 Nxf7 25. Kd1 Nd6 26. Ke2 b6 27. Nb3 Kd7 28. Kf3 Ke6 29. Nd2 Kd5 30. Bb2 Nc4 31. Nxc4 Kxc4 32. a3 Bg7 33. g4 Kd5 34. h4 e5 35. Ke3 c5 36. bxc5 Kxc5 37. Ke4 exf4 38. Kxf4 g5+ 39. Kg3 gxh4+ 40. Kxh4 Kd5 41. Kh5 Ke4 42. g5 Kf5 43. gxf6 Bxf6 44. Bc1 Bg7 45. Be3 Ke4 46. Bd2 b5 47. Bb4 Ke3 48. Ba5 Ke2 49. Bb4 Kd1 50. Bc5 a6 51. c3 Kc2 52. Bd4 Bf8 53. Kg5 Bxa3 54. Kh6 Bb2 55. Kxh7 Bxc3 56. Bb6 b4 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Kees, Maurice"]
[Black "Koffeman, Timotheus"]
[Result "0-1"]
[ECO "C50"]
[PlyCount "78"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 Nf6 2. Nc3 e5 3. Nf3 d6 4. d4 exd4 5. Nxd4 Be7 6. Bc4 0-0 7. 0-0 Nc6 8. Be3 Ne5 9. Bb3 Bg4 10. Qd2 Qd7 11. f4 Nc6 12. f5 Ne5 13. h3 Bh5 14. g4 Bxg4 15. hxg4 Nfxg4 16. Nf3 Bf6 17. Rae1 Qe7 18. Nd5 Qd8 19. Qe2 Bh4 20. Nxe5 Nxe3 21. Qxe3 Bxe1 22. Qxe1 dxe5 23. Qg3 c6 24. f6 g6 25. Ne7+ Kh8 26. Qxe5 Qd2 27. Rf2 Qd1+ 28. Kh2 Rad8 29. Qf4 Qh5+ 30. Kg2 Rd1 31. Rf1 g5 32. Qf3 Rd2+ 33. Rf2 g4 34. Qe3 Rd1 35. Rf1 Rfd8 36. Qg3 R8d2+ 37. Kg1 Rxf1+ 38. Kxf1 Qh1+ 39. Qg1 Rd1+ 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Koffeman, Timotheus"]
[Black "Ammerlaan, Richard"]
[Result "0-1"]
[ECO "E61"]
[PlyCount "64"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Bg5 0-0 7. e3 Nc6 8. Be2 d6 9. 0-0 Bd7 10. Rc1 Rc8 11. Qd2 Re8 12. Rfd1 a6 13. a3 Na5 14. Bxf6 Bxf6 15. Ne4 Bxd4 16. exd4 f5 17. Ng3 Nb3 18. Qh6 Nxc1 19. Rxc1 e5 20. dxe5 dxe5 21. Rc3 Qf6 22. Nh5 Qf8 23. Qg5 Rc6 24. Rb3 Qe7 25. Qxe7 Rxe7 26. Ng3 Be6 27. Rc3 Rec7 28. b3 b5 29. h3 bxc4 30. bxc4 Bxc4 31. Bxc4+ Rxc4 32. Re3 f4 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Koffeman, Timotheus"]
[Black "Buitelaar, Jacob"]
[Result "1-0"]
[ECO "E61"]
[PlyCount "93"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Bg5 d6 5. e3 Bf5 6. Bd3 Bxd3 7. Qxd3 Nc6 8. Nf3 0-0 9. 0-0 Re8 10. Qe2 e5 11. d5 Nb8 12. Ne4 Nbd7 13. Rac1 h6 14. Bxf6 Nxf6 15. Nxf6+ Bxf6 16. e4 Rc8 17. Rc2 Re7 18. Rfc1 Rd7 19. c5 dxc5 20. Rxc5 Rd6 21. Qc2 c6 22. Qa4 Qb6 23. b4 a6 24. b5 axb5 25. Rxb5 Qxb5 26. Qxb5 cxb5 27. Rxc8+ Kg7 28. Rc2 Ra6 29. Kf1 Ra4 30. d6 Rc4 31. Rb2 b4 32. d7 Rxe4 33. Rc2 b5 34. Rc8 Rc4 35. d8Q Bxd8 36. Rxd8 e4 37. Ne1 Kf6 38. Rd5 b3 39. Rxb5 bxa2 40. Ra5 Rc3 41. Rxa2 e3 42. f3 Kg5 43. Ke2 f5 44. g3 f4 45. Ra5+ Kf6 46. gxf4 Rb3 47. Nd3 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Koffeman, Timotheus"]
[Black "Hommes, Wouter"]
[Result "1/2-1/2"]
[ECO "D59"]
[PlyCount "38"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 0-0 6. Nf3 h6 7. Bh4 b6 8. cxd5 Nxd5 9. Nxd5 Bxh4 10. Nxh4 exd5 11. Nf3 a5 12. Bd3 Ba6 13. 0-0 Bxd3 14. Qxd3 Nd7 15. Rac1 Rc8 16. Rfd1 Qf6 17. h3 c6 18. Rc3 Rc7 19. Rdc1 Rfc8 1/2-1/2

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Koffeman, Timotheus"]
[Black "Van Woerden, Michiel"]
[Result "1-0"]
[ECO "D58"]
[PlyCount "83"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Bg5 Be7 4. Nc3 d5 5. e3 b6 6. cxd5 exd5 7. Bd3 Bb7 8. Nf3 Nbd7 9. 0-0 0-0 10. Rc1 h6 11. Bh4 c5 12. Bf5 a6 13. Qc2 Rc8 14. Ne5 Rc7 15. Nxd7 Nxd7 16. Bg3 Rc8 17. Qd3 c4 18. Qc2 b5 19. Qe2 Ra8 20. Qf3 Nf6 21. Be5 b4 22. Ne2 Bd6 23. Rfd1 Bxe5 24. dxe5 Nd7 25. Qg3 Nb6 26. Rd4 Qg5 27. Qh3 Kh8 28. Ng3 Bc8 29. Rh4 Bxf5 30. Nxf5 Kh7 31. Rg4 Qxf5 32. Rxg7+ Kxg7 33. Qxf5 Rab8 34. Qf6+ Kh7 35. Rd1 Rg8 36. Rd4 Rg6 37. Qxf7+ Rg7 38. Qf5+ Rg6 39. Rg4 Rbg8 40. h4 h5 41. Qxh5+ Rh6 42. Qf7+ 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Koffeman, Timotheus"]
[Black "Visschedijk, Marijn"]
[Result "0-1"]
[ECO "D58"]
[PlyCount "92"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 0-0 6. Nf3 h6 7. Bh4 b6 8. cxd5 exd5 9. Bd3 Bb7 10. 0-0 Nbd7 11. Rc1 Ne4 12. Bxe7 Qxe7 13. Qb3 Ndf6 14. Ne5 Nd2 15. Qc2 Nxf1 16. Kxf1 c5 17. Nf3 Rac8 18. Qd2 Ne4 19. Qe2 Rfe8 20. Bb5 Red8 21. Bd3 Nxc3 22. bxc3 cxd4 23. Nxd4 Qa3 24. Qd2 Ba6 25. Bxa6 Qxa6+ 26. Kg1 Rd7 27. g3 Rdc7 28. Ne2 Qc4 29. Kg2 Qe4+ 30. Kg1 b5 31. Rd1 Rc5 32. Qd4 Qc2 33. Rd2 Qb1+ 34. Kg2 a6 35. Qe5 Qe4+ 36. Qxe4 dxe4 37. Rd6 a5 38. Rb6 Rd5 39. Nd4 Rxc3 40. Nxb5 Rc2 41. Nd4 Rxa2 42. Rb8+ Kh7 43. Rb7 Kg6 44. h4 a4 45. Ra7 a3 46. Nb3 Rf5 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Lieven, Menno"]
[Black "Koffeman, Timotheus"]
[Result "1/2-1/2"]
[ECO "B02"]
[PlyCount "143"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. Nc3 d6 5. exd6 exd6 6. Nf3 Bg4 7. d3 Nc6 8. Be2 Be7 9. 0-0 0-0 10. Be3 Bf6 11. Qd2 Re8 12. Rfe1 Bf5 13. a3 Ne5 14. Nd4 Bd7 15. Ne4 Bh4 16. Rac1 Nexc4 17. dxc4 Rxe4 18. Bf3 Re7 19. Bxb7 Rb8 20. Bc6 Qe8 21. Bxd7 Qxd7 22. b3 Rbe8 23. Nf3 Bf6 24. Rcd1 Qc6 25. Bxb6 Qxb6 26. Rxe7 Rxe7 27. Qb4 Qxb4 28. axb4 Bc3 29. b5 h6 30. Kf1 Ba5 31. Nd4 Bb6 32. Nc6 Re8 33. Ra1 Ra8 34. Ke2 f6 35. Kf3 Kf7 36. Re1 a5 37. Ra1 Ke6 38. Re1+ Kf7 39. Ra1 g5 40. g4 Kg6 41. h3 f5 42. Ne7+ Kf6 43. Nxf5 h5 44. Ng3 hxg4+ 45. hxg4 Rf8 46. Nf5 Rh8 47. Kg2 Re8 48. Ng3 Re5 49. Nh5+ Kg6 50. Ng3 d5 51. Rc1 dxc4 52. bxc4 Bc5 53. Rd1 Bb6 54. Rd5 Rxd5 55. cxd5 a4 56. Ne4 Bd4 57. Nd2 a3 58. Nb3 a2 59. Kf3 a1Q 60. Nxa1 Bxa1 61. Ke4 Kf6 62. f4 gxf4 63. Kxf4 Be5+ 64. Ke4 Bd6 65. Kd4 Kg5 66. Kc4 Kxg4 67. b6 cxb6 68. Kb5 Bc7 69. Kc6 Bd8 70. Kd7 Kf5 71. Kxd8 Ke5 72. Kc7 1/2-1/2

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Overbeeke, Pim"]
[Black "Koffeman, Timotheus"]
[Result "1-0"]
[ECO "D02"]
[PlyCount "121"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 e6 3. Bf4 Bd6 4. Bg3 Nc6 5. e3 Nf6 6. c3 0-0 7. Nbd2 Ne7 8. Bd3 Ng6 9. Qc2 c5 10. Bxd6 Qxd6 11. Bxg6 fxg6 12. Ne5 b6 13. 0-0 Bb7 14. Qa4 Rfc8 15. Rfe1 Rc7 16. Qd1 Rac8 17. Qf3 Rf8 18. Qe2 Nd7 19. Ndf3 Nxe5 20. Nxe5 Rf5 21. Qb5 Bc6 22. Qd3 Qf8 23. Qd2 Qd6 24. Rac1 Rc8 25. Rc2 Rcf8 26. Qc1 Bb5 27. g4 R5f6 28. g5 Rf5 29. f4 Rc8 30. Kg2 Rff8 31. h4 cxd4 32. exd4 Rf5 33. Kg3 Rcf8 34. Rf2 Be8 35. Qe3 a5 36. b3 b5 37. Kg4 Kh8 38. Kg3 h5 39. Qe2 Kh7 40. c4 dxc4 41. bxc4 Qxd4 42. Qe3 Qxe3+ 43. Rxe3 bxc4 44. Rc3 Bb5 45. Rb2 Rb8 46. a4 Rbf8 47. Rxb5 Rxf4 48. Rxc4 Rf1 49. Rc2 R8f5 50. Rxa5 Re1 51. Nc6 Re3+ 52. Kg2 Rff3 53. Rf2 Rh3 54. Ra8 Rhg3+ 55. Kf1 Ra3 56. Rff8 Rgf3+ 57. Rxf3 Rxf3+ 58. Kg2 Rf4 59. Kg3 Rc4 60. Ne5 Re4 61. Nf7 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Sparenberg, Erik"]
[Black "Koffeman, Timotheus"]
[Result "0-1"]
[ECO "B02"]
[PlyCount "96"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 Nf6 2. Nc3 d5 3. e5 d4 4. exf6 dxc3 5. bxc3 exf6 6. Bc4 Bf5 7. Qf3 Qc8 8. Rb1 c6 9. d4 Bd6 10. Qe2+ Be6 11. f4 0-0 12. Nf3 Bxc4 13. Qxc4 Re8+ 14. Kf2 Nd7 15. Qd3 Qc7 16. Bd2 Bxf4 17. Bxf4 Qxf4 18. Rxb7 Nb6 19. Re1 Rxe1 20. Kxe1 g6 21. c4 Qg4 22. Kf2 Qe6 23. Qe2 Qxe2+ 24. Kxe2 Nxc4 25. Kd3 Na5 26. Rc7 a6 27. Kc3 Rb8 28. Nd2 Rb7 29. Rxb7 Nxb7 30. Ne4 f5 31. Nc5 Nxc5 32. dxc5 Kf8 33. Kb4 Ke7 34. Ka5 Kd7 35. Kxa6 Kc7 36. Ka5 g5 37. Kb4 f6 38. Kc4 Kb7 39. Kd4 Ka6 40. h4 h6 41. hxg5 hxg5 42. g3 Ka5 43. Kc3 Ka4 44. Kd3 Ka3 45. c4 Kxa2 46. Kc2 f4 47. gxf4 gxf4 48. Kd3 Kb3 0-1

