[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.09"]
[Round "9"]
[White "Kowalczyk, Stefan"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "D60"]
[PlyCount "81"]
[EventDate "2000.05.01"]
[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 Nf6 2. c4 b6 3. d4 e6 4. Bg5 Bb7 5. Nc3 Be7 6. e3 d5 7. Bd3 Nbd7 8. 0-0 0-0 9. b3 c5 10. Qc2 h6 11. Bh4 Rc8 12. Nd2 g5 13. Bg3 dxc4 14. bxc4 cxd4 15. exd4 Nh5 16. Rad1 Nxg3 17. hxg3 Nf6 18. Nde4 Nxe4 19. Nxe4 Bxe4 20. Bxe4 Qc7 21. Bd3 Rfd8 22. Qb1 Kg7 23. Be2 Bf6 24. Qe4 Qc6 25. Qe3 Rd6 26. d5 exd5 27. cxd5 Qe8 28. Qa3 Qd7 29. Bg4 Rc3 30. Qxc3 Bxc3 31. Bxd7 Rxd7 32. Rd3 Bb4 33. Rc1 Bc5 34. Kf1 Kf6 35. Re1 Kf5 36. Rf3+ Kg6 37. Rd3 Kf5 38. Re8 Kg6 39. Ke2 Kf5 40. Rh8 Kg6 41. g4 1-0

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.08"]
[Round "8"]
[White "Vinck, Martin"]
[Black "Kowalczyk, Stefan"]
[Result "1-0"]
[ECO "B01"]
[PlyCount "57"]
[EventDate "2000.05.01"]
[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 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 c6 6. Bc4 Bf5 7. Ne5 e6 8. g4 Bg6 9. h4 Nbd7 10. Nxd7 Nxd7 11. h5 Be4 12. Rh3 Bg2 13. Re3 Nb6 14. Bd3 Nd5 15. f3 Nxe3 16. Bxe3 Qc7 17. Kf2 g6 18. h6 Bxf3 19. Kxf3 f5 20. Bf4 Bd6 21. Qe1 Kd7 22. gxf5 gxf5 23. Nb5 cxb5 24. Bxb5+ Kd8 25. Qxe6 Bxf4 26. Qf6+ Qe7 27. Qxh8+ Kc7 28. Qg7 Bd6 29. Re1 1-0

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.07"]
[Round "7"]
[White "Kowalczyk, Stefan"]
[Black "Willemze, Thomas"]
[Result "0-1"]
[ECO "A34"]
[BlackElo "2268"]
[PlyCount "169"]
[EventDate "2000.05.01"]
[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 Nf6 2. c4 c5 3. Nc3 b6 4. e4 d6 5. d4 cxd4 6. Nxd4 Bb7 7. Bd3 e6 8. 0-0 Be7 9. Qe2 0-0 10. Bg5 Nbd7 11. Rad1 h6 12. Bh4 Nc5 13. Bb1 Nfxe4 14. Bxe7 Nxc3 15. Qc2 Be4 16. Qxe4 N5xe4 17. Bxd8 Nxb1 18. Be7 Rfe8 19. Bh4 Nbd2 20. Rfe1 g5 21. Bg3 Nxg3 22. Rxd2 Nf5 23. Nxf5 exf5 24. Red1 Rad8 25. Kf1 Re6 26. Rd5 f4 27. h4 f6 28. f3 Kf7 29. b4 Rc8 30. R1d4 Ke7 31. h5 Rc6 32. b5 Rc7 33. a4 Re5 34. Rxd6 Rec5 35. a5 Rxc4 36. axb6 axb6 37. Rd2 Rc2 38. R2d4 Rb2 39. Rc6 Rxc6 40. bxc6 Rc2 41. Rd7+ Ke6 42. Rh7 b5 43. Rxh6 b4 44. Rh8 Rxc6 45. Rb8 Rc1+ 46. Ke2 Rh1 47. Rxb4 Rxh5 48. Rb6+ Kf5 49. Kf2 Rh1 50. g4+ Kg6 51. Ra6 Rd1 52. Ra7 Rd2+ 53. Ke1 Rd6 54. Kf2 Rb6 55. Kg2 Rb8 56. Kf2 Rb2+ 57. Kf1 Rb3 58. Kg2 Rb5 59. Kf2 Rb6 60. Kg2 Rc6 61. Kf2 f5 62. gxf5+ Kxf5 63. Ra5+ Kg6 64. Ra8 Kf6 65. Kg2 Kg6 66. Ra7 Rc2+ 67. Kf1 Rc5 68. Kf2 Kf5 69. Rf7+ Ke5 70. Re7+ Kd4 71. Rd7+ Rd5 72. Ra7 Kc3 73. Rc7+ Kd2 74. Rc8 Kd1 75. Rg8 Rd2+ 76. Kf1 Kc2 77. Rxg5 Kd3 78. Rd5+ Ke3 79. Rxd2 Kxd2 80. Kf2 Kd3 81. Kg2 Ke2 82. Kg1 Kxf3 83. Kf1 Ke3 84. Ke1 f3 85. Kf1 0-1

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.06"]
[Round "6"]
[White "Kowalczyk, Stefan"]
[Black "Monteban, Martijn"]
[Result "1/2-1/2"]
[ECO "D44"]
[PlyCount "52"]
[EventDate "2000.05.01"]
[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 Nf6 2. c4 c6 3. d4 d5 4. Nc3 e6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5 Nbd7 11. exf6 Bb7 12. Qf3 Qb6 13. 0-0-0 c5 14. d5 b4 15. Nb1 Bxd5 16. Rxd5 exd5 17. Bxc4 0-0-0 18. Qxd5 Bh6 19. f4 Bxg5 20. fxg5 Rh4 21. Rd1 Rxh2 22. Nd2 Nxf6 23. Qe5 Rxg2 24. gxf6 Qd6 25. Qe3 Kb8 26. Bxf7 Qxf6 1/2-1/2

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.05"]
[Round "5"]
[White "Van Beek, Alexander"]
[Black "Kowalczyk, Stefan"]
[Result "1/2-1/2"]
[ECO "B01"]
[WhiteElo "2275"]
[PlyCount "65"]
[EventDate "2000.05.01"]
[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 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Bd2 c6 6. Bd3 Bg4 7. Ne4 Nxe4 8. Bxa5 Bxd1 9. Rxd1 Nf6 10. c4 g6 11. Nf3 Bg7 12. 0-0 0-0 13. Rfe1 Re8 14. Ne5 Nbd7 15. f4 Rac8 16. Bc3 e6 17. Be2 Rcd8 18. Bf3 Bf8 19. b4 Nxe5 20. fxe5 Nd7 21. c5 Nb8 22. b5 Rd7 23. Rb1 Rc8 24. a4 b6 25. bxc6 Nxc6 26. cxb6 axb6 27. d5 Ne7 28. dxe6 fxe6 29. Bb4 Ra7 30. Bg4 Nf5 31. Bxf8 Kxf8 32. Rxb6 Rxa4 33. Bxf5 1/2-1/2

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.04"]
[Round "4"]
[White "Kowalczyk, Stefan"]
[Black "Berkvens, Joost"]
[Result "0-1"]
[ECO "A85"]
[BlackElo "2297"]
[PlyCount "74"]
[EventDate "2000.05.01"]
[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 f5 2. d4 Nf6 3. c4 g6 4. Nc3 Bg7 5. e3 0-0 6. Bd3 d6 7. 0-0 Nc6 8. d5 Nb4 9. Bb1 c6 10. Qa4 a5 11. Rd1 Nd7 12. Rd2 Nb6 13. Qb3 a4 14. Qd1 Nxc4 15. Rd4 cxd5 16. Nxd5 Nxd5 17. Rxc4 e6 18. Rxa4 Nc3 19. bxc3 Rxa4 20. Qxa4 Bxc3 21. Bxf5 Bxa1 22. Bd3 Bg7 23. h4 Bd7 24. Qc2 Qb6 25. Qe2 Qc5 26. Bd2 Ra8 27. Be1 Ra4 28. g3 Qd5 29. Nd2 b5 30. e4 Qe5 31. f4 Qc5+ 32. Kh2 Rxa2 33. g4 Qc1 34. e5 dxe5 35. f5 exf5 36. gxf5 Bh6 37. Qg2 Rxd2 0-1

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.03"]
[Round "3"]
[White "Vink, Nico"]
[Black "Kowalczyk, Stefan"]
[Result "1/2-1/2"]
[ECO "B01"]
[WhiteElo "2302"]
[PlyCount "149"]
[EventDate "2000.05.01"]
[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 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Bc4 c6 6. Nf3 Bf5 7. Bd2 e6 8. Qe2 Bb4 9. 0-0-0 Nbd7 10. a3 Bxc3 11. Bxc3 Qc7 12. Bb3 0-0-0 13. Bd2 Ne4 14. Be3 Nb6 15. Ne5 Nd5 16. g4 Bg6 17. f3 Nd6 18. Bd2 Nb5 19. c3 Qa5 20. Nxg6 hxg6 21. Qe5 Qc7 22. Rde1 Rh3 23. Bd1 Nd6 24. Qe2 c5 25. dxc5 Qxc5 26. Bb3 b5 27. Kb1 Nc4 28. Bxc4 bxc4 29. Qf1 Rdh8 30. Re4 Nb6 31. Be3 Qd5 32. Bxb6 axb6 33. Rxc4+ Kb7 34. Rd4 Qxf3 35. Rd7+ Kc6 36. Rxf7 Qe4+ 37. Ka2 Rxh2 38. Rxh2 Rxh2 39. Rf4 Qd5+ 40. Rc4+ Kb7 41. Qf4 Ka6 42. Qe4 Rd2 43. Qxd5 Rxd5 44. Re4 e5 45. c4 Rd7 46. Kb3 Rd3+ 47. Ka4 Rf3 48. Kb4 Rf4 49. Rxe5 Rxg4 50. a4 Rf4 51. Rg5 Rf6 52. b3 Kb7 53. a5 Rf5 54. Rxg6 Rxa5 55. Rxg7+ Kc6 56. Rg6+ Kc7 57. Rh6 Rg5 58. Ka3 Ra5+ 59. Kb2 Rg5 60. b4 Rg3 61. b5 Rf3 62. Kc2 Rg3 63. Rc6+ Kb7 64. Rd6 Kc7 65. Rd3 Rg1 66. Kc3 Rc1+ 67. Kd4 Kd6 68. Rd2 Rh1 69. Rg2 Rd1+ 70. Kc3 Rc1+ 71. Kb3 Rb1+ 72. Ka3 Kc5 73. Rg6 Kxc4 74. Rxb6 Rxb5 75. Rxb5 1/2-1/2

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.02"]
[Round "2"]
[White "Wortel, Marten"]
[Black "Kowalczyk, Stefan"]
[Result "0-1"]
[ECO "B01"]
[WhiteElo "2297"]
[PlyCount "40"]
[EventDate "2000.05.01"]
[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 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Bc4 Bf5 6. Nge2 e6 7. 0-0 c6 8. Ng3 h5 9. Bd2 Bg6 10. Nd5 Qd8 11. Nf4 Be4 12. Nxe4 Nxe4 13. Re1 Qxd4 14. Qe2 Nxd2 15. Bxe6 Qxf4 16. Bc8+ Kd8 17. g3 Nf3+ 18. Kh1 Qf6 19. Qe8+ Kc7 20. Red1 Qe7 0-1

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.01"]
[Round "1"]
[White "Kowalczyk, Stefan"]
[Black "Stellwagen, Daniel"]
[Result "1-0"]
[ECO "B14"]
[BlackElo "2265"]
[PlyCount "65"]
[EventDate "2000.05.01"]
[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 Nf6 2. d4 c5 3. e3 d5 4. c4 cxd4 5. exd4 Nc6 6. cxd5 Nxd5 7. Nc3 e6 8. Bb5 Nxc3 9. bxc3 Bd7 10. Bf4 Be7 11. 0-0 0-0 12. Rb1 Rc8 13. Bd3 Na5 14. Qc2 g6 15. Bh6 Re8 16. Ne5 Bf8 17. Bxf8 Rxf8 18. h4 Bc6 19. h5 Qf6 20. Rfe1 Rfd8 21. Re3 Kg7 22. Rg3 Be8 23. Qd2 Kg8 24. Rf3 Qg7 25. h6 Qh8 26. Qg5 Nc6 27. Nxf7 Bxf7 28. Rxf7 Kxf7 29. Rxb7+ Kg8 30. Bxg6 Rd5 31. Bxh7+ Kf8 32. Qf4+ Rf5 33. Qd6+ 1-0

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.14"]
[Round "9"]
[White "Kowalczyk, Stefan"]
[Black "Porte, Henrik"]
[Result "1/2-1/2"]
[ECO "B05"]
[PlyCount "129"]
[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. d4 d6 4. Nf3 Bg4 5. Be2 Nc6 6. c4 Nb6 7. exd6 exd6 8. 0-0 Be7 9. b3 Bf6 10. Bb2 0-0 11. Nbd2 Re8 12. Re1 Qd7 13. Nf1 Bxf3 14. Bxf3 Rxe1 15. Qxe1 Nxd4 16. Bxd4 Bxd4 17. Rd1 c5 18. Qe4 Re8 19. Qxb7 Qxb7 20. Bxb7 Re2 21. Ng3 Rxa2 22. Ne4 Rb2 23. Nxd6 Rxb3 24. Re1 g6 25. h3 Rb2 26. Re8+ Kg7 27. Re7 Rxf2 28. Kh2 a5 29. Bf3 a4 30. Rxf7+ Kg8 31. Rb7 a3 32. Rxb6 a2 33. Ra6 a1Q 34. Rxa1 Bxa1 35. Kg3 Rc2 36. Kf4 Kf8 37. Bd5 h6 38. Nb5 Ke7 39. Nc7 Kd6 40. Nb5+ Ke7 41. Nc7 Kd6 42. Nb5+ Ke7 43. Nc7 Rf2+ 44. Kg3 Rf5 45. Nb5 Kf6 46. Bf3 Kg5 47. Kf2 Be5 48. Ke2 Kf4 49. Na3 Kg3 50. Nc2 Rf4 51. Ne3 Rxf3 52. gxf3 Kxh3 53. Ng4 Bf4 54. Nf2+ Kg2 55. Ne4 h5 56. Nxc5 h4 57. Nd3 Bc7 58. Nf2 h3 59. c5 h2 60. Ke3 h1Q 61. Nxh1 Kxh1 62. Ke4 Kg2 63. f4 Kg3 64. f5 gxf5+ 65. Kxf5 1/2-1/2

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.13"]
[Round "7"]
[White "Lesger, Morrison"]
[Black "Kowalczyk, Stefan"]
[Result "0-1"]
[ECO "B01"]
[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 d5 2. exd5 Qxd5 3. d4 Nf6 4. c4 Qd8 5. Nc3 Bf5 6. Nf3 e6 7. Be2 Bb4 8. 0-0 0-0 9. Qb3 Qe7 10. Bf4 c5 11. Nb5 Ne8 12. a3 Ba5 13. Nxa7 e5 14. Bxe5 Rxa7 15. Bxb8 Ra8 16. Be5 f6 17. Qa4 Bd7 18. Qb3 Bf5 19. Bg3 Qxe2 20. Qxb7 Be4 21. d5 Rd8 22. b4 Rf7 23. Qc6 Bc7 24. Qxc5 Bxg3 25. fxg3 Rc7 26. Rfe1 Rxc5 27. Rxe2 Rxc4 28. Nd2 Bd3 29. Rxe8+ Rxe8 30. Nxc4 Bxc4 31. Rd1 Rd8 32. d6 Kf7 33. Kf2 Ke6 34. Ke3 Rxd6 35. Rxd6+ Kxd6 36. Kd4 Bf1 37. a4 Kc6 38. h4 Bxg2 39. Kc4 Bd5+ 40. Kd4 Bb3 41. a5 Kb5 42. g4 Be6 43. g5 Bc8 44. gxf6 gxf6 45. Kd5 Kxb4 46. a6 Bxa6 47. Ke6 h5 48. Kxf6 Be2 49. Ke5 Bg4 50. Kd4 Kb3 51. Kd3 Kb2 52. Kd2 Bf5 53. Ke3 Kc2 0-1

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.13"]
[Round "8"]
[White "Schoorl, Rob"]
[Black "Kowalczyk, Stefan"]
[Result "1/2-1/2"]
[ECO "B06"]
[PlyCount "27"]
[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 g6 2. d4 Bg7 3. Nc3 d5 4. exd5 Nf6 5. Bc4 Nbd7 6. Bg5 0-0 7. Bxf6 Nxf6 8. Nge2 b6 9. 0-0 Bb7 10. Nf4 Bh6 11. Qf3 e6 12. Rad1 Bxf4 13. Qxf4 Nxd5 14. Nxd5 1/2-1/2

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.12"]
[Round "6"]
[White "Kowalczyk, Stefan"]
[Black "Jellema, Yme Jan"]
[Result "0-1"]
[ECO "B13"]
[PlyCount "54"]
[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 c6 2. c4 d5 3. exd5 cxd5 4. d4 Nf6 5. h3 e6 6. Nf3 Nbd7 7. Nc3 b6 8. Bf4 a6 9. Bd3 Bb7 10. 0-0 Be7 11. Re1 0-0 12. Ne5 dxc4 13. Nxc4 Nb8 14. Be5 Nc6 15. Re3 b5 16. Nd2 Nxd4 17. Nde4 Nxe4 18. Nxe4 Nf5 19. Re2 Qd5 20. f4 Rad8 21. Rd2 Bc5+ 22. Nxc5 Qxc5+ 23. Kh2 Qe3 24. Rc1 Qg3+ 25. Kg1 Rxd3 26. Rc7 Qe3+ 27. Kh1 Bxg2+ 0-1

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.11"]
[Round "5"]
[White "Kowalczyk, Stefan"]
[Black "Stevens, Frank"]
[Result "1-0"]
[ECO "B01"]
[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 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bg4 6. Be2 Nc6 7. h3 Bf5 8. Bd2 e6 9. Bb5 Bb4 10. Qe2 0-0 11. 0-0 Ne7 12. a3 Bxc3 13. Bxc3 Qb6 14. Bb4 c5 15. Bxc5 Qc7 16. Rfd1 Rfd8 17. Qe5 Qxe5 18. dxe5 Nfd5 19. c4 Rdc8 20. Bd6 1-0

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.11"]
[Round "4"]
[White "Vleeming, Patriek"]
[Black "Kowalczyk, Stefan"]
[Result "0-1"]
[ECO "B01"]
[PlyCount "82"]
[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 Qxd5 3. Nc3 Qa5 4. d4 c6 5. Nf3 Nf6 6. Bd2 Qc7 7. Be2 Bf5 8. 0-0 Nbd7 9. Bc4 e6 10. a3 Bd6 11. Re1 0-0-0 12. Qe2 Bg4 13. h3 Bh5 14. b4 g5 15. Bxg5 Rdg8 16. Bh4 Rg6 17. Bd3 Rg7 18. Ne4 Nxe4 19. Qxe4 Rhg8 20. Bf1 Bg6 21. Qe2 Bf5 22. Kh1 f6 23. Bg3 Bxg3 24. fxg3 Qxg3 25. c4 e5 26. dxe5 fxe5 27. Ng1 e4 28. Qe3 Ne5 29. Qxg3 Rxg3 30. Ra2 Rb3 31. g4 Bg6 32. Bg2 Nd3 33. Rf1 Rd8 34. Ne2 Ne5 35. Nf4 e3 36. Nxg6 hxg6 37. c5 Rd2 38. Rxd2 exd2 39. Rd1 Nc4 40. Kg1 Rg3 41. Kf2 Rxg2+ 0-1

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.10"]
[Round "3"]
[White "Kowalczyk, Stefan"]
[Black "Veltman, Anne"]
[Result "1-0"]
[ECO "C28"]
[PlyCount "93"]
[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 e5 2. f4 d6 3. Nf3 Nc6 4. Bc4 Nf6 5. Nc3 Be7 6. d3 Bg4 7. Be3 exf4 8. Bxf4 Nd4 9. Nb5 Nxb5 10. Bxb5+ c6 11. Ba4 d5 12. exd5 Nxd5 13. Bg3 Ne3 14. Qd2 Nxg2+ 15. Qxg2 Qa5+ 16. c3 Qxa4 17. 0-0 0-0 18. Ne5 Be6 19. Bf4 Bf6 20. d4 g6 21. Bg5 Bd5 22. Qg3 Bxg5 23. Qxg5 Qa5 24. Nd7 Qd8 25. Nf6+ Kg7 26. Qe5 Qb8 27. Ne8+ Kh6 28. Qg7+ Kg5 29. Qxf8 Qxe8 30. Qxe8 Rxe8 31. Rae1 Be6 32. Kg2 Rd8 33. b3 Rd7 34. Kg3 Bf5 35. Re8 Be6 36. Rh8 Kh6 37. Rf4 Kg7 38. Ra8 b5 39. Rc8 Bd5 40. Rf1 Re7 41. Kf2 Kf6 42. Re1 Rd7 43. Kg3 Rb7 44. c4 bxc4 45. bxc4 Bxc4 46. Rxc6+ Be6 47. d5 1-0

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.10"]
[Round "2"]
[White "Stotyn, Fabian"]
[Black "Kowalczyk, Stefan"]
[Result "1/2-1/2"]
[ECO "B01"]
[PlyCount "91"]
[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 Qxd5 3. Nc3 Qa5 4. Nf3 Nf6 5. d3 c6 6. Bd2 Qc7 7. Be2 Bg4 8. 0-0 e6 9. Ng5 h5 10. Nge4 Nbd7 11. f4 0-0-0 12. a3 Nc5 13. Nxf6 Bxe2 14. Qxe2 gxf6 15. Ne4 f5 16. Ng5 f6 17. Nf3 Re8 18. Nh4 Bd6 19. b4 Nd7 20. c4 c5 21. b5 e5 22. Nxf5 exf4 23. Qf3 Ne5 24. Qxf4 Reg8 25. Nxd6+ Qxd6 26. Qf5+ Qd7 27. Qxd7+ Nxd7 28. Bc3 Rg6 29. Rae1 Rhg8 30. Re2 Kc7 31. Rf3 Kd6 32. g3 h4 33. Kf2 Rh6 34. Rfe3 hxg3+ 35. hxg3 Rhg6 36. a4 Rg5 37. Rf3 f5 38. a5 Rh5 39. Rfe3 Rg6 40. d4 cxd4 41. Bxd4 b6 42. axb6 axb6 43. Rd3 Rh2+ 44. Kf1 Rxe2 45. Kxe2 Nc5 46. Rd1 1/2-1/2

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.09"]
[Round "1"]
[White "Kowalczyk, Stefan"]
[Black "Wever, Dennis"]
[Result "0-1"]
[ECO "A50"]
[PlyCount "128"]
[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. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. 0-0 0-0 5. c4 b6 6. Nc3 Bb7 7. d4 c5 8. d5 e6 9. e4 d6 10. Bf4 Nh5 11. Bg5 Qd7 12. Qd2 e5 13. Ne1 f5 14. Nd3 Na6 15. Be3 Nb4 16. Nxb4 f4 17. Nd3 Bh6 18. gxf4 exf4 19. Nxf4 Nxf4 20. Ne2 Qg4 21. Nxf4 Rxf4 22. Bxf4 Bxf4 23. Qd3 Bc8 24. Rab1 Qh4 25. h3 g5 26. Rfe1 g4 27. hxg4 Bxg4 28. Kf1 Rf8 29. Bf3 Bg5 30. Ke2 Rxf3 31. Qxf3 Bxf3+ 32. Kxf3 Qf4+ 33. Kg2 Bh4 34. Rg1 Kh8 35. Rbf1 Bf6 36. Re1 Bxb2 37. f3 Be5 38. Re2 Qg3+ 39. Kf1 Qxf3+ 40. Rf2 Qd3+ 41. Kg2 Qxe4+ 42. Kf1 Qb1+ 43. Kg2 Qxg1+ 44. Kxg1 Bd4 45. Kg2 Bxf2 46. Kxf2 Kg7 47. Kf3 Kf6 48. Kf4 a6 49. a4 h6 50. Kf3 Kf5 51. Kg3 Ke4 52. Kg4 Kd4 53. Kf5 h5 54. Ke6 h4 55. Kxd6 h3 56. Kc7 h2 57. d6 h1Q 58. d7 Qh7 59. a5 Qxd7+ 60. Kxb6 Kxc4 61. Kxa6 Qe6+ 62. Ka7 Kb5 63. Kb8 Qd7 64. Ka8 Ka6 0-1

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1999.05.08"]
[Round "9"]
[White "Sparenberg, Erik"]
[Black "Kowalczyk, Stefan"]
[Result "0-1"]
[ECO "B01"]
[PlyCount "46"]
[EventDate "1999.05.03"]
[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 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Bc4 Bf5 6. Nf3 e6 7. Bd2 c6 8. 0-0 Qc7 9. Ne2 Bd6 10. Ng3 Bg4 11. Re1 Nbd7 12. c3 h5 13. Bg5 h4 14. Ne4 Bxh2+ 15. Kf1 Bf4 16. Qd3 0-0-0 17. b4 Bf5 18. Bxh4 Nxe4 19. Bxd8 Kxd8 20. Rxe4 Nf6 21. Ke2 Nxe4 22. Qd1 Nxc3+ 23. Ke1 Nxd1 0-1

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1999.05.07"]
[Round "8"]
[White "Kowalczyk, Stefan"]
[Black "Vinck, Martin"]
[Result "0-1"]
[ECO "B23"]
[PlyCount "66"]
[EventDate "1999.05.03"]
[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. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bc4 e6 6. f5 Nge7 7. fxe6 dxe6 8. 0-0 h6 9. d3 g5 10. Ne2 g4 11. Ne1 Ng6 12. Nf4 Nxf4 13. Rxf4 h5 14. Qe2 Qc7 15. g3 Be5 16. Rf1 Nd4 17. Qg2 h4 18. Bf4 hxg3 19. hxg3 Rh3 20. c3 Bxf4 21. gxf4 Rg3 22. Bb5+ Bd7 23. Bxd7+ Qxd7 24. Qxg3 Ne2+ 25. Kf2 Nxg3 26. Kxg3 f5 27. e5 Qh7 28. Rg1 0-0-0 29. Rd1 Rh8 30. Ng2 Qh2+ 31. Kf2 Rh3 32. Rdf1 Qg3+ 33. Ke2 Qxd3+ 0-1

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1999.05.07"]
[Round "7"]
[White "Werle, Jan"]
[Black "Kowalczyk, Stefan"]
[Result "1/2-1/2"]
[ECO "C10"]
[WhiteElo "2223"]
[PlyCount "132"]
[EventDate "1999.05.03"]
[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. Nd2 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Nxf6+ Nxf6 7. Bd3 c5 8. dxc5 Bxc5 9. 0-0 Qc7 10. b3 Bd7 11. Bb2 Bd6 12. Qe2 Bc6 13. Ne5 Nd7 14. Nxc6 bxc6 15. h3 Be5 16. c3 0-0 17. Rfe1 Rfd8 18. Rad1 Bf6 19. Be4 Nb6 20. Qh5 g6 21. Qf3 Bg7 22. Bxc6 Rxd1 23. Rxd1 Rc8 24. Be4 f5 25. Bb1 Bxc3 26. Rc1 Nd5 27. Bd3 Qe5 28. Qe2 Qxe2 29. Bxe2 Rc7 30. Ba3 Kf7 31. Bf3 Kf6 32. Kf1 Be5 33. Rxc7 Bxc7 34. Bxd5 exd5 35. Bc5 a6 36. Ke2 Ke6 37. Kd3 Kd7 38. f3 Kc6 39. Bd4 Bf4 40. g4 Kb5 41. Bc3 Kc6 42. gxf5 gxf5 43. a4 h5 44. Bf6 Bg3 45. Bg7 Bf2 46. Be5 Kc5 47. Bc3 Kc6 48. Bd4 Be1 49. Bg7 Bf2 50. Bf8 Bg1 51. Kc3 Bf2 52. Bg7 Bg1 53. b4 Bf2 54. Bh6 Bg1 55. Kd3 Bf2 56. Be3 Bh4 57. b5+ axb5 58. axb5+ Kxb5 59. Kd4 Kc6 60. Ke5 Be1 61. Kxf5 Kb5 62. Kg5 h4 63. f4 Kc4 64. f5 d4 65. Bf4 d3 66. f6 d2 1/2-1/2

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1999.05.06"]
[Round "6"]
[White "Kowalczyk, Stefan"]
[Black "Erwich, Frank"]
[Result "1-0"]
[ECO "C45"]
[BlackElo "2126"]
[PlyCount "75"]
[EventDate "1999.05.03"]
[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 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bb4+ 5. c3 Bc5 6. Be3 Bb6 7. Bc4 Ne5 8. Bb3 Nf6 9. f3 d5 10. exd5 Nxd5 11. Bxd5 Qxd5 12. 0-0 0-0 13. Bf2 c5 14. Nc2 Qc6 15. Ne3 c4 16. Qd5 Bxe3 17. Qxe5 Bxf2+ 18. Rxf2 Re8 19. Qd4 Bf5 20. Na3 Bd3 21. Nc2 Rad8 22. Qf4 Qa4 23. Nd4 Qxa2 24. Qc1 Qxa1 25. Qxa1 Rd6 26. h3 a6 27. Kh2 h6 28. Rd2 g6 29. Rd1 b5 30. Re1 Rb8 31. Re7 b4 32. Qe1 Rbd8 33. Re8+ Rxe8 34. Qxe8+ Kg7 35. Qe5+ Rf6 36. Nc6 bxc3 37. bxc3 g5 38. Ne7 1-0

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1999.05.05"]
[Round "4"]
[White "Kodentsov, Grigori"]
[Black "Kowalczyk, Stefan"]
[Result "1/2-1/2"]
[ECO "E97"]
[PlyCount "84"]
[EventDate "1999.05.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 e5 7. 0-0 Nc6 8. d5 Ne7 9. b4 a5 10. Ba3 axb4 11. Bxb4 Nd7 12. a4 f5 13. Ng5 Nf6 14. Bf3 h6 15. Ne6 Bxe6 16. dxe6 Qc8 17. Nd5 Nc6 18. Ba3 Ne8 19. exf5 e4 20. e7 Rxf5 21. Bxe4 Bxa1 22. Bxf5 Qxf5 23. Qxa1 Rxa4 24. Qc1 Kh7 25. Bb2 Ne5 26. Bxe5 Qxe5 27. g3 Qd4 28. Ne3 Qe4 29. Re1 c6 30. Qd1 Ra8 31. Qd2 Rc8 32. h3 Qe5 33. Ng4 Qg7 34. f4 h5 35. Nf2 Rc7 36. Qe3 d5 37. cxd5 cxd5 38. Qd3 d4 39. Ne4 Kh8 40. Ng5 Rxe7 41. Rxe7 Qxe7 42. Qxg6 Qe1+ 1/2-1/2

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1999.05.05"]
[Round "5"]
[White "Kowalczyk, Stefan"]
[Black "Castellani, Sandro"]
[Result "1/2-1/2"]
[ECO "B25"]
[PlyCount "94"]
[EventDate "1999.05.03"]
[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. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 e6 7. Nf3 Nge7 8. 0-0 0-0 9. Ne2 Rb8 10. c3 b5 11. Be3 Bb7 12. g4 f5 13. g5 e5 14. fxe5 Nxe5 15. Nxe5 Bxe5 16. d4 cxd4 17. cxd4 Bg7 18. Qd3 fxe4 19. Bxe4 Bxe4 20. Rxf8+ Qxf8 21. Qxe4 Nf5 22. Bf2 Re8 23. Qd5+ Qf7 24. Qxf7+ Kxf7 25. Kf1 Ne3+ 26. Bxe3 Rxe3 27. Rc1 Re7 28. Rc3 Ke6 29. Re3+ Kd7 30. Rc3 Rf7+ 31. Ke1 Ke6 32. Rd3 Kd5 33. Kd2 Rf2 34. Rh3 Bxd4 35. Ke1 Bb6 36. Rxh7 Rf5 37. h4 Kc4 38. Kd2 Bf2 39. Re7 d5 40. Rc7+ Kb4 41. Rc6 Ka5 42. Rxg6 Bxh4 43. Nd4 Rxg5 44. Re6 Rg2+ 45. Kc3 Rg3+ 46. Kc2 Rg2+ 47. Kc3 Rg3+ 1/2-1/2

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1999.05.04"]
[Round "2"]
[White "Azadmanesh, Moosa"]
[Black "Kowalczyk, Stefan"]
[Result "1/2-1/2"]
[ECO "C62"]
[WhiteElo "2140"]
[PlyCount "59"]
[EventDate "1999.05.03"]
[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 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 exd4 5. Nxd4 Bd7 6. Nc3 Nxd4 7. Bxd7+ Qxd7 8. Qxd4 Ne7 9. Be3 Nc6 10. Qd5 Be7 11. f4 Bf6 12. Qd2 Bxc3 13. Qxc3 f6 14. 0-0-0 0-0-0 15. Qa3 a6 16. Rhe1 Rhe8 17. Bf2 Re6 18. Re2 Rde8 19. Rde1 d5 20. Qf3 dxe4 21. Rxe4 Rxe4 22. Rxe4 Rxe4 23. Qxe4 h6 24. c3 Nd8 25. h3 Qe6 26. Qxe6+ Nxe6 27. Be3 f5 28. Kc2 h5 29. Kd3 Kd7 30. b3 1/2-1/2

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1999.05.04"]
[Round "3"]
[White "Kowalczyk, Stefan"]
[Black "Bax, Frank"]
[Result "1-0"]
[ECO "C45"]
[PlyCount "119"]
[EventDate "1999.05.03"]
[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 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nb3 Bb6 6. a4 a5 7. Nc3 Nb4 8. Bc4 c6 9. 0-0 d6 10. Bf4 Bc7 11. Qe2 Qe7 12. Bg3 Be6 13. Bxe6 fxe6 14. Rad1 0-0-0 15. Nb1 Nh6 16. Nd4 Qd7 17. Na3 d5 18. Bxc7 Kxc7 19. c3 Na6 20. exd5 exd5 21. Ne6+ Kb8 22. Nxd8 Rxd8 23. Rfe1 Nc5 24. Rd4 Nf5 25. Rf4 Ne4 26. Rd1 Nfd6 27. c4 g5 28. Rf3 Re8 29. Re3 Qf7 30. cxd5 cxd5 31. f3 Nf5 32. fxe4 Nxe3 33. Qxe3 Rxe4 34. Qg3+ Ka8 35. Qxg5 Qe8 36. h3 Re5 37. Nb5 Rxg5 38. Nc7+ Kb8 39. Nxe8 Rg6 40. Rxd5 Re6 41. Nd6 Kc7 42. Nb5+ Kc6 43. Rh5 Re7 44. Kf2 Re4 45. Nc3 Rb4 46. Rb5 Rd4 47. Ke3 Rd7 48. Rxa5 Rg7 49. g4 Re7+ 50. Kf4 b6 51. Rh5 Rf7+ 52. Kg5 Kc5 53. Kh6+ Kb4 54. Rb5+ Kc4 55. Rxb6 Kc5 56. Rb5+ Kc6 57. g5 Kd6 58. h4 Ke6 59. Rb6+ Ke5 60. h5 1-0

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1999.05.03"]
[Round "1"]
[White "Kowalczyk, Stefan"]
[Black "Van Beek, Guido"]
[Result "1/2-1/2"]
[ECO "B23"]
[PlyCount "38"]
[EventDate "1999.05.03"]
[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. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bc4 d6 6. 0-0 e6 7. d3 Nge7 8. a4 0-0 9. Ne2 d5 10. Ba2 b6 11. c3 Ba6 12. e5 d4 13. Bb1 Bb7 14. g4 Qd7 15. Ng3 f6 16. exf6 Bxf6 17. Ne4 Bg7 18. Ba2 Nd5 19. Qe1 Rae8 1/2-1/2

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1998.??.??"]
[Round "?"]
[White "Azadmanesh, Moosa"]
[Black "Kowalczyk, Stefan"]
[Result "1-0"]
[ECO "C42"]
[WhiteElo "2145"]
[PlyCount "25"]
[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 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 Nxc3 6. dxc3 Be7 7. Be3 Bg4 8. h3 Be6 9. Qd2 Nd7 10. Nd4 Nb6 11. Bd3 Nc4 12. Nxe6 Nxd2 13. Nxd8 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Groenhuis, Vincent"]
[Black "Kowalczyk, Stefan"]
[Result "1-0"]
[ECO "C42"]
[PlyCount "115"]
[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 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d3 Nf6 6. Nc3 d5 7. Bf4 Bb4 8. a3 Ba5 9. b4 Bb6 10. Be2 a5 11. 0-0 axb4 12. axb4 Rxa1 13. Qxa1 0-0 14. Bg5 c6 15. Na4 Nbd7 16. c4 h6 17. Nxb6 Qxb6 18. Bd2 Re8 19. Re1 dxc4 20. dxc4 Ne4 21. c5 Qc7 22. Be3 Ndf6 23. Bd4 Qf4 24. Ne5 Nxf2 25. Bc4 Rxe5 26. Bxe5 Qxc4 27. Kxf2 Ng4+ 28. Kg1 Qxb4 29. Qc3 Qxc3 30. Bxc3 Be6 31. h3 Nf6 32. Bxf6 gxf6 33. Rb1 Bc8 34. Ra1 Kg7 35. Ra8 Be6 36. Rb8 Bd5 37. Rxb7 Kg6 38. Kf2 Kg7 39. Rd7 Bc4 40. Rd6 Bb5 41. Ke3 Kg6 42. Kf4 Ba4 43. g3 h5 44. g4 hxg4 45. Kxg4 Bb5 46. Kf4 Ba4 47. Rd2 Bb5 48. Rg2+ Kh5 49. Kf5 Kh4 50. Kxf6 Kxh3 51. Rg7 Bc4 52. Rxf7 Bd5 53. Rc7 Kg4 54. Ke5 Kf3 55. Kd6 Ke4 56. Rxc6 Kd4 57. Rb6 Bg2 58. c6 1-0

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1998.??.??"]
[Round "?"]
[White "Hoogeboom, Arthur"]
[Black "Kowalczyk, Stefan"]
[Result "1/2-1/2"]
[ECO "B52"]
[PlyCount "52"]
[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 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4 Nc6 6. d4 cxd4 7. Nxd4 g6 8. 0-0 Bg7 9. Be3 Nh6 10. f3 f5 11. Nc3 fxe4 12. Qd2 Ne5 13. b3 Nf5 14. Nxf5 gxf5 15. fxe4 fxe4 16. Nxe4 Qc6 17. Nc3 Rg8 18. Rae1 Nf3+ 19. Rxf3 Bxc3 20. Qxc3 Qxf3 21. Qd2 Qf5 22. Bf2 Kd7 23. c5 d5 24. Bh4 e6 25. Qb4 Kc8 26. c6 bxc6 1/2-1/2

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Koster, Ramon H"]
[Black "Kowalczyk, Stefan"]
[Result "1-0"]
[ECO "D03"]
[PlyCount "79"]
[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. Nf3 Nf6 3. Bg5 Ne4 4. Bf4 Bf5 5. e3 Nd7 6. Nfd2 Nxd2 7. Nxd2 c5 8. c3 cxd4 9. exd4 Qb6 10. Qb3 Qxb3 11. Nxb3 e6 12. Be2 Be7 13. 0-0 Bd8 14. Rfe1 a6 15. Bf3 0-0 16. Bd6 Re8 17. Bxd5 Be7 18. Bxe7 exd5 19. Bh4 Nb6 20. Nc5 Nc4 21. Nxb7 Rxe1+ 22. Rxe1 Nxb2 23. h3 Na4 24. Re3 h6 25. Nd6 Be6 26. f4 g6 27. g4 Rb8 28. f5 Rb1+ 29. Kg2 Rb2+ 30. Kf3 gxf5 31. gxf5 Bd7 32. Re7 Bb5 33. Bf6 Re2 34. Rxe2 Bxe2+ 35. Kxe2 Nxc3+ 36. Kd3 Nxa2 37. h4 Nb4+ 38. Kc3 Nc6 39. Nc8 a5 40. Ne7+ 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Kowalczyk, Stefan"]
[Black "Beekhuis, Maarten"]
[Result "1-0"]
[ECO "C45"]
[PlyCount "139"]
[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 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. e5 Qe7 7. Qe2 Nd5 8. c4 Ba6 9. g3 0-0-0 10. Bg2 Re8 11. 0-0 Nb6 12. b3 Qxe5 13. Qxe5 Rxe5 14. Rd1 f6 15. Nc3 Bb4 16. Bb2 Rhe8 17. Bf3 R5e7 18. a3 Bxc3 19. Bxc3 Bb7 20. a4 c5 21. Bg4 Kd8 22. Bh5 Rg8 23. a5 Nc8 24. b4 cxb4 25. Bxb4 Re4 26. Bf7 Rh8 27. Rd2 d6 28. Rc1 Rf8 29. Bh5 Ba6 30. Rdc2 c5 31. Bd2 g6 32. Bf3 Re7 33. Be3 Bb7 34. Bg4 Be4 35. Rd2 Kc7 36. Rcd1 f5 37. Be2 Re6 38. Bf4 Rd8 39. g4 Ne7 40. Rb2 Ba8 41. Kf1 Nc6 42. gxf5 gxf5 43. Rb5 Ne5 44. Rb3 Rg8 45. f3 Bc6 46. Re3 Rge8 47. Kf2 Ng6 48. Rxe6 Rxe6 49. Bg5 Re8 50. h4 Rb8 51. h5 Ne5 52. Be7 Nf7 53. Bd3 Rb2+ 54. Kg3 Bd7 55. Kf4 Ne5 56. Bxf5 Nxc4 57. Bxh7 Nxa5 58. Bxd6+ Kc8 59. Bxc5 Nc6 60. Be4 Rh2 61. Kg5 Rg2+ 62. Kf6 Rh2 63. Bg6 a5 64. f4 Bg4 65. Rd5 Bf3 66. Rg5 Rh4 67. Be3 a4 68. Bf5+ Kc7 69. Rg7+ Kd6 70. Rd7# 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Kowalczyk, Stefan"]
[Black "Gerritse, Youri"]
[Result "1-0"]
[ECO "B00"]
[PlyCount "39"]
[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 Nc6 2. Nf3 Nf6 3. e5 Ng4 4. d4 d6 5. h3 Nh6 6. Bb5 a6 7. Bxc6+ bxc6 8. Bxh6 gxh6 9. Qd3 Rb8 10. Qc3 Rg8 11. Rg1 Bb7 12. Nbd2 Bg7 13. 0-0-0 Qd7 14. Qd3 Qe6 15. Qxh7 Kf8 16. b3 dxe5 17. dxe5 c5 18. Qd3 a5 19. Ne4 c4 20. Qd8+ 1-0

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1998.??.??"]
[Round "?"]
[White "Kowalczyk, Stefan"]
[Black "Heltzel, Joost"]
[Result "1-0"]
[ECO "C32"]
[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. f4 e5 2. e4 d5 3. exd5 e4 4. d3 Nf6 5. c4 c6 6. Nc3 Bb4 7. Bd2 Bc5 8. dxe4 Qb6 9. Nf3 Bf2+ 10. Ke2 Bg4 11. h3 Nh5 12. Kd3 Ng3 13. Rh2 Na6 14. Na4 Bxf3 15. gxf3 Qd4+ 16. Kc2 b5 17. cxb5 Qxa4+ 18. b3 Qd4 19. bxa6 cxd5 20. exd5 0-0 21. Bc3 Rac8 22. Qxd4 Bxd4 23. Bc4 Nf5 24. Bxd4 Nxd4+ 25. Kd3 Nxf3 26. Re2 Rfe8 27. Rxe8+ Rxe8 28. Rf1 Nh4 29. Bb5 Rd8 30. Bc6 Nf5 31. Re1 Kf8 32. b4 Ne7 33. Kc4 Nc8 34. a4 Nd6+ 35. Kc5 Nf5 36. b5 Nh4 37. b6 Ng6 38. Re8+ Rxe8 39. Bxe8 axb6+ 40. Kxb6 Ne7 41. Bc6 Nxc6 42. dxc6 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Kowalczyk, Stefan"]
[Black "Lesger, Morrison"]
[Result "1-0"]
[ECO "B51"]
[PlyCount "46"]
[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 c5 2. Nf3 d6 3. Bb5+ Nd7 4. 0-0 g6 5. d4 cxd4 6. Qxd4 Ngf6 7. e5 dxe5 8. Nxe5 a6 9. Qc4 e6 10. Bxd7+ Bxd7 11. Rd1 Nd5 12. Nxd7 Qxd7 13. Nc3 Rc8 14. Nxd5 exd5 15. Qd4 Rg8 16. Re1+ Kd8 17. Qb6+ Qc7 18. Bg5+ Kd7 19. Qf6 Bc5 20. Qxf7+ Kc6 21. Qf6+ Bd6 22. c4 Kd7 23. Qf7+ Kc6 1-0

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1998.??.??"]
[Round "?"]
[White "Kowalczyk, Stefan"]
[Black "Muhren, Willem"]
[Result "1/2-1/2"]
[ECO "B51"]
[PlyCount "87"]
[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 c5 2. Nf3 d6 3. Bb5+ Nd7 4. 0-0 a6 5. Bxd7+ Bxd7 6. d4 cxd4 7. Qxd4 Bc6 8. Nbd2 e6 9. Rd1 Nf6 10. b3 Be7 11. Bb2 0-0 12. e5 Nd7 13. Qe3 dxe5 14. Nxe5 Nxe5 15. Bxe5 f6 16. Bb2 e5 17. Nc4 Qc7 18. Ba3 Bxa3 19. Nxa3 b5 20. c4 Qf7 21. Rac1 Qe7 22. Nb1 f5 23. cxb5 f4 24. Qc5 Qxc5 25. Rxc5 Bxb5 26. Rxe5 f3 27. Nc3 fxg2 28. Kxg2 Bc6+ 29. Nd5 Rad8 30. Kg3 Kh8 31. f4 h6 32. Ne3 Rxd1 33. Nxd1 Rd8 34. Nf2 Rd2 35. Re6 Bb5 36. a4 Be2 37. Re3 Bd1 38. Nxd1 Rxd1 39. Re6 Rd3+ 40. Kg4 Rxb3 41. Rxa6 Kh7 42. a5 Ra3 43. Kf5 Rh3 44. Rb6 1/2-1/2

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1998.??.??"]
[Round "?"]
[White "Kowalczyk, Stefan"]
[Black "Plukkel, Sjoerd"]
[Result "1-0"]
[ECO "B30"]
[PlyCount "73"]
[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 c5 2. Nf3 Nc6 3. Bb5 e6 4. b3 Be7 5. Bb2 Nf6 6. Qe2 0-0 7. Nc3 a6 8. Bxc6 bxc6 9. 0-0 d5 10. Ne1 dxe4 11. Rd1 Bb7 12. Nxe4 Nxe4 13. Qxe4 Bf6 14. Bxf6 Qxf6 15. Nf3 Rfd8 16. Qe5 Qe7 17. Rfe1 Rd5 18. Qe3 a5 19. Ne5 Rad8 20. Nc4 Qc7 21. Qc3 Ra8 22. Re3 Rg5 23. Ne5 Rd8 24. Rde1 Ba6 25. h3 Rd5 26. f4 Rf5 27. g3 Qb6 28. Kh1 Rd4 29. d3 a4 30. Re4 axb3 31. axb3 Rxe4 32. Rxe4 f6 33. g4 c4 34. gxf5 fxe5 35. Qxe5 Bc8 36. Qd4 Qa5 37. fxe6 1-0

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1998.??.??"]
[Round "?"]
[White "Kowalczyk, Stefan"]
[Black "Stange, Sven"]
[Result "1/2-1/2"]
[ECO "B30"]
[PlyCount "29"]
[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 c5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 bxc6 5. 0-0 d5 6. exd5 cxd5 7. d4 e6 8. c3 Nf6 9. Ne5 Bd6 10. Qa4+ Bd7 11. Nxd7 Qxd7 12. Qxd7+ Kxd7 13. dxc5 Bxc5 14. Nd2 Ke7 15. Nb3 1/2-1/2

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Kowalczyk, Stefan"]
[Black "Tates, Thomas"]
[Result "1-0"]
[ECO "B52"]
[PlyCount "97"]
[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 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4 Nc6 6. 0-0 Nf6 7. Nc3 e6 8. d4 cxd4 9. Nxd4 a6 10. Be3 Be7 11. Rc1 0-0 12. f4 Nxd4 13. Bxd4 Rac8 14. b3 Rfd8 15. g4 e5 16. Bb6 Nxg4 17. Bxd8 Rxd8 18. Qf3 Rf8 19. Nd5 Bd8 20. Rcd1 f5 21. h3 Nh6 22. fxe5 Re8 23. exd6 fxe4 24. Qf4 Qf7 25. Qg3 Nf5 26. Qg4 g6 27. Nc7 Re5 28. Rd5 Qg7 29. Rxe5 Qxe5 30. Rxf5 Qxf5 31. Qxf5 gxf5 32. Ne6 Bf6 33. d7 Kf7 34. d8Q Bxd8 35. Nxd8+ Ke7 36. Nxb7 f4 37. Kf2 Ke6 38. Nc5+ Ke5 39. Nxa6 Kd4 40. Nb4 Kc5 41. Nc2 h6 42. a4 h5 43. a5 h4 44. Ke2 Kc6 45. b4 Kd6 46. Nd4 Ke5 47. Nb3 Kd6 48. b5 Kc7 49. c5 1-0

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1998.??.??"]
[Round "?"]
[White "Kowalczyk, Stefan"]
[Black "Willemze, Thomas"]
[Result "0-1"]
[ECO "B01"]
[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 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. Nf3 Nf6 5. Bc4 Bf5 6. d3 e6 7. Bd2 c6 8. Qe2 Bb4 9. 0-0 Nbd7 10. a3 Bxc3 11. Bxc3 Qc7 12. Ne5 Nb6 13. Bb3 h5 14. f4 Nbd5 15. Bxd5 Nxd5 16. Qf2 h4 17. Bd2 b6 18. Nc4 0-0-0 19. a4 Kb8 20. a5 b5 21. Ne3 a6 22. Nxd5 cxd5 23. Be3 Rd6 24. b4 f6 25. Bc5 Rc6 26. Qe3 Rg8 27. Rae1 Ka8 28. Kh1 Qb7 29. Qd4 Rc7 30. Rf2 Rh8 31. Rc1 Rd7 32. Qe3 Bg4 33. Kg1 Re8 34. d4 Bf5 35. c3 g6 36. Qe2 Rg7 37. g4 hxg3 38. hxg3 Rh7 39. Rh2 Reh8 40. Rxh7 Qxh7 41. Kf2 Qh2+ 42. Ke3 Qxg3+ 43. Qf3 Qh2 44. Qf2 Rh3+ 45. Ke2 Bd3+ 46. Ke1 Qh1+ 47. Kd2 Qe4 48. Rf1 Bxf1 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Kowalczyk, Stefan"]
[Black "Wolbers, Joan"]
[Result "1-0"]
[ECO "B13"]
[PlyCount "71"]
[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 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nf3 Nc6 6. Nc3 Bg4 7. cxd5 Nxd5 8. Be2 e6 9. 0-0 Be7 10. Nxd5 Qxd5 11. h3 Bh5 12. Be3 0-0 13. Qa4 Rfd8 14. Rfd1 Bf6 15. Rac1 Qa5 16. Qxa5 Nxa5 17. Rc7 Rac8 18. Rdc1 Nc6 19. Rxb7 Bxf3 20. Bxf3 Nxd4 21. Rxc8 Nxf3+ 22. gxf3 Rxc8 23. Bxa7 g6 24. Rb8 Rxb8 25. Bxb8 Bxb2 26. a4 Bc3 27. Bc7 Kg7 28. a5 Kf6 29. Bb6 Bxa5 30. Bxa5 Kf5 31. Kg2 g5 32. Bd2 h6 33. h4 f6 34. Kg3 e5 35. h5 Ke6 36. Bb4 1-0

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1998.??.??"]
[Round "?"]
[White "Monteban, Martijn"]
[Black "Kowalczyk, Stefan"]
[Result "0-1"]
[ECO "D55"]
[PlyCount "148"]
[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. Nf3 h6 6. Bxf6 Bxf6 7. e3 0-0 8. Bd3 dxc4 9. Bxc4 Qe7 10. 0-0 Rd8 11. Qc2 c5 12. dxc5 Qxc5 13. Ne4 Qe7 14. Rfd1 Nc6 15. Rxd8+ Qxd8 16. Rd1 Qc7 17. Nxf6+ gxf6 18. Qc3 Kg7 19. Bb5 Bd7 20. Bxc6 Qxc6 21. Qd4 Be8 22. Qg4+ Kh7 23. Qd4 Qa4 24. Qxa4 Bxa4 25. b3 Be8 26. Rc1 Kg6 27. g3 Rd8 28. Re1 Rc8 29. Rd1 Rc2 30. Rd2 Rc1+ 31. Kg2 Bc6 32. g4 a5 33. Kg3 a4 34. bxa4 Bxa4 35. Nh4+ Kg7 36. Rb2 b5 37. Nf3 Rc2 38. Rxc2 Bxc2 39. Nd4 Bd3 40. a3 Kg6 41. f4 e5 42. f5+ Kg7 43. Nf3 h5 44. h3 hxg4 45. hxg4 Kf8 46. Kf2 Ke7 47. Ke1 Kd6 48. Kd2 Be4 49. Nh2 Kc5 50. Kc3 Bg2 51. Kd3 Kd5 52. Kd2 Kc4 53. Kc2 e4 54. g5 fxg5 55. Ng4 Kd5 56. Nh6 f6 57. Ng4 Bh3 58. Nxf6+ Ke5 59. Nh5 Kxf5 60. Ng3+ Kg6 61. Kc3 Bg2 62. Kb4 g4 63. Kxb5 Kg5 64. Kc5 Kh4 65. Ne2 Bf1 66. Nf4 Kg3 67. Kd4 Kf3 68. a4 g3 69. a5 Bd3 70. Nh3 g2 71. a6 Bxa6 72. Ng1+ Kf2 73. Nh3+ Kg3 74. Ng5 Bd3 0-1

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1998.??.??"]
[Round "?"]
[White "Pot, Erik"]
[Black "Kowalczyk, Stefan"]
[Result "1/2-1/2"]
[ECO "C42"]
[PlyCount "25"]
[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 e5 2. Nf3 Nf6 3. Nc3 Bb4 4. d3 d5 5. exd5 Nxd5 6. Bd2 Nxc3 7. Bxc3 Bxc3+ 8. bxc3 0-0 9. Be2 Nc6 10. 0-0 Re8 11. Nd2 Qe7 12. Bf3 Bd7 13. Nb3 1/2-1/2

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Schoorl, Rob"]
[Black "Kowalczyk, Stefan"]
[Result "1/2-1/2"]
[ECO "C42"]
[PlyCount "51"]
[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 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. 0-0 Nc6 8. Re1 Bg4 9. c4 Nf6 10. cxd5 Nxd5 11. Nc3 Be6 12. Bb5 0-0 13. Bxc6 bxc6 14. Ne5 Nxc3 15. bxc3 Qe8 16. Qa4 c5 17. Nc6 cxd4 18. Nxe7+ Qxe7 19. Ba3 c5 20. cxd4 Qe8 21. Qc2 Qc6 22. dxc5 Rfe8 23. Re3 Bd5 24. Rg3 Re6 25. Bb2 f6 26. Re3 1/2-1/2

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Stange, Sven"]
[Black "Kowalczyk, Stefan"]
[Result "0-1"]
[ECO "C42"]
[PlyCount "58"]
[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 e5 2. Nf3 Nf6 3. Bc4 Nxe4 4. 0-0 d5 5. Re1 f6 6. Nxe5 fxe5 7. Qh5+ Kd7 8. Bxd5 Nf6 9. Qxe5 Qe7 10. Qxe7+ Bxe7 11. Be6+ Kd6 12. Bc4 Bf5 13. d3 Nc6 14. c3 Kd7 15. d4 Bd6 16. Be3 Rhe8 17. Nd2 Re7 18. h3 Rae8 19. a3 Bf4 20. Nf1 Na5 21. Ba2 Bd3 22. b4 Nc4 23. Bxc4 Bxc4 24. Bd2 Bxd2 25. Rxe7+ Rxe7 26. Nxd2 Bf7 27. f3 Re2 28. Rd1 Nd5 29. Kf1 Nxc3 0-1

[Event "NED-ch U14"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "7"]
[White "Erwich, Frank"]
[Black "Kowalczyk, Stefan"]
[Result "1-0"]
[ECO "B07"]
[PlyCount "49"]
[EventDate "1997.??.??"]
[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 d6 2. d4 Nf6 3. Bd3 g6 4. f4 Bg4 5. Nf3 Nc6 6. c3 e5 7. d5 Ne7 8. fxe5 dxe5 9. 0-0 Qd6 10. Be3 0-0-0 11. Nbd2 Nexd5 12. exd5 Nxd5 13. Nc4 Qd7 14. Bf2 Nxc3 15. bxc3 Bxf3 16. Qxf3 Qxd3 17. Qxd3 Rxd3 18. Nxe5 Rxc3 19. Nxf7 Rg8 20. Rac1 Ra3 21. Rc2 Bb4 22. Rb1 Be7 23. Bg3 c6 24. Bd6 Bf6 25. Bxa3 1-0

[Event "NED-ch U14"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "5"]
[White "Groenhuis, Vincent"]
[Black "Kowalczyk, Stefan"]
[Result "0-1"]
[ECO "C45"]
[PlyCount "120"]
[EventDate "1997.??.??"]
[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. Nf3 d6 3. d4 exd4 4. Nxd4 Nc6 5. Nxc6 bxc6 6. Nc3 f5 7. Bd3 fxe4 8. Bxe4 Bd7 9. 0-0 Nf6 10. Bf3 Be7 11. Bg5 0-0 12. Re1 d5 13. Bxf6 Bxf6 14. Nxd5 Bxb2 15. Rb1 Ba3 16. Nb4 Rf6 17. Re3 Bxb4 18. Rxb4 Qf8 19. Rb7 Qc8 20. Reb3 Be6 21. Rb2 Bxa2 22. h3 Bc4 23. Qb1 Bb5 24. Bxc6 Rxc6 25. R2xb5 Rb6 26. R7xb6 cxb6 27. Qb3+ Kh8 28. Qf3 Rb8 29. Qf7 a6 30. Rg5 g6 31. Re5 Qf8 32. Qc7 Qd8 33. Qf7 Qd1+ 34. Kh2 Qd6 35. Qf4 Rf8 36. Qe3 Rxf2 37. Kg1 Rf6 38. Re8+ Kg7 39. Re7+ Rf7 40. Qc3+ Kf8 41. Re3 Qf6 42. Qa3+ Kg7 43. Re8 a5 44. Qa4 Qf1+ 45. Kh2 Qf4+ 46. Qxf4 Rxf4 47. Kg3 Rc4 48. Rb8 Rc6 49. Kf3 a4 50. Ra8 b5 51. Ra5 Rc3+ 52. Ke4 Rxc2 53. Rxb5 Rxg2 54. Ra5 Rg3 55. Rxa4 Rxh3 56. Ra7+ Kh6 57. Kf4 Rh5 58. Kg4 Rb5 59. Ra4 Rb7 60. Rc4 Kg7 0-1

[Event "NED-ch U14"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "4"]
[White "Kowalczyk, Stefan"]
[Black "Castellani, Sandro"]
[Result "1/2-1/2"]
[ECO "E11"]
[PlyCount "75"]
[EventDate "1997.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. d4 Bb4+ 4. Bd2 Bxd2+ 5. Nbxd2 c5 6. Nb3 cxd4 7. Nfxd4 d5 8. e3 0-0 9. Be2 Nc6 10. 0-0 Nxd4 11. Qxd4 b6 12. Rfd1 Bb7 13. c5 Rc8 14. Rac1 Ne4 15. f3 bxc5 16. Nxc5 Nxc5 17. Rxc5 Qb6 18. b4 Rxc5 19. bxc5 Qa5 20. a4 Rc8 21. Rb1 Bc6 22. Bb5 Rb8 23. Qd3 Bb7 24. Ba6 Qc7 25. Qb5 Qe5 26. Bxb7 Qxe3+ 27. Kf1 a6 28. Qxa6 Qxc5 29. Qb5 Qc2 30. Qb2 Qxa4 31. Qc1 h6 32. g3 g6 33. Qc7 Qa7 34. Qb6 Qa3 35. Kg2 Qd3 36. Rb2 Qc3 37. Ra2 Kh7 38. Rb2 1/2-1/2

[Event "NED-ch U14"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "6"]
[White "Kowalczyk, Stefan"]
[Black "Koster, Ramon H"]
[Result "1/2-1/2"]
[ECO "B07"]
[PlyCount "118"]
[EventDate "1997.??.??"]
[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 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 Bg7 5. f3 Nbd7 6. Bc4 b6 7. Qd2 c5 8. Nge2 a6 9. dxc5 Nxc5 10. Bh6 0-0 11. Bxg7 Kxg7 12. 0-0 b5 13. Bb3 Qb6 14. Kh1 Bb7 15. Nf4 Nxb3 16. axb3 Rfc8 17. b4 Qc7 18. Rfc1 Qc4 19. Nce2 Rc7 20. c3 Qc6 21. Rd1 Qe8 22. Nc1 Nd7 23. Nb3 Kg8 24. Rab1 Ne5 25. Nd3 Nc4 26. Qf2 Bc8 27. Nd2 Qc6 28. Nf4 Rca7 29. Nd5 Rb7 30. Nxc4 bxc4 31. Qe2 Be6 32. Rd4 Rc8 33. Nf4 Qd7 34. Nxe6 Qxe6 35. Ra1 Rb6 36. Ra5 Rc7 37. Rad5 Rbc6 38. f4 f6 39. g4 Qf7 40. e5 dxe5 41. fxe5 Qe6 42. Qf2 Rc8 43. exf6 exf6 44. Rd8+ Rxd8 45. Rxd8+ Kg7 46. Rd4 Rd6 47. Rxd6 Qxd6 48. h3 Qc6+ 49. Kg1 Qd6 50. Kh1 g5 51. Qe1 Qd5+ 52. Kg1 Kf7 53. Qf2 Qe6 54. Qa7+ Kg6 55. Qf2 f5 56. gxf5+ Qxf5 57. Qg2 Kh5 58. Qe2+ Kh4 59. Qxc4+ Kxh3 1/2-1/2

[Event "NED-ch U14"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "2"]
[White "Kowalczyk, Stefan"]
[Black "Lahaye, Rick"]
[Result "1-0"]
[ECO "A37"]
[PlyCount "73"]
[EventDate "1997.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. Nf3 c5 2. c4 Nc6 3. Nc3 g6 4. g3 Bg7 5. Bg2 d6 6. d3 Bd7 7. 0-0 a6 8. Bd2 Rb8 9. a4 Qc8 10. Re1 Bh3 11. Bh1 Nf6 12. Qc1 h6 13. Rb1 g5 14. Nd5 b5 15. Nxf6+ Bxf6 16. axb5 axb5 17. cxb5 Rxb5 18. b4 g4 19. Nh4 Bxh4 20. gxh4 Rg8 21. Bxc6+ Qxc6 22. e4 d5 23. Qc2 g3 24. fxg3 dxe4 25. dxe4 Qd6 26. Be3 cxb4 27. Re2 b3 28. Rxb3 Ra5 29. Rb1 Ra8 30. e5 Qd5 31. Rc1 Rg6 32. Rd1 Qxe5 33. Bg5 Qa5 34. Bxe7 Qa7+ 35. Bc5+ Be6 36. Bxa7 Rxa7 37. Qc8+ 1-0

[Event "NED-ch U14"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "8"]
[White "Kowalczyk, Stefan"]
[Black "Van Beek, Guido"]
[Result "1/2-1/2"]
[ECO "A84"]
[PlyCount "83"]
[EventDate "1997.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. Nf3 d5 2. c4 e6 3. d4 c6 4. e3 f5 5. c5 Nf6 6. Nbd2 Be7 7. Bd3 0-0 8. b4 Nbd7 9. 0-0 Ne4 10. Ne1 e5 11. Bb2 Nxd2 12. Qxd2 e4 13. Be2 Qc7 14. f4 exf3 15. gxf3 Nf6 16. Nd3 Nh5 17. f4 Nf6 18. Bf3 Ne4 19. Qe1 Be6 20. Ne5 a5 21. a4 axb4 22. Qxb4 Ra5 23. Bc3 Nxc3 24. Qxc3 Rfa8 25. Qc2 Bf6 26. Kh1 Bd7 27. Ra2 Kh8 28. Nf7+ Kg8 29. Ne5 Bxe5 30. fxe5 b5 31. Rfa1 Qa7 32. Bd1 bxa4 33. Rxa4 Rxa4 34. Rxa4 Qxa4 35. Qxa4 Rxa4 36. Bxa4 g5 37. Bd1 Be8 38. Kg2 Kf8 39. h4 h6 40. hxg5 hxg5 41. Kg3 Ke7 42. Be2 1/2-1/2

[Event "NED-ch U14"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "3"]
[White "Molinari, Gabriel"]
[Black "Kowalczyk, Stefan"]
[Result "1-0"]
[ECO "C41"]
[PlyCount "81"]
[EventDate "1997.??.??"]
[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. Nf3 d6 3. d4 exd4 4. Nxd4 g6 5. Bc4 Bg7 6. 0-0 Nc6 7. c3 Nf6 8. Bg5 h6 9. Bh4 Nxd4 10. cxd4 g5 11. Bg3 Nxe4 12. Re1 d5 13. Bxd5 Qxd5 14. Nc3 Qd8 15. Rxe4+ Kf8 16. d5 f5 17. Rc4 Bxc3 18. Bxc7 Qf6 19. Rxc3 Bd7 20. Re3 Re8 21. Rxe8+ Bxe8 22. Qb3 Qa6 23. d6 Rh7 24. Qc3 Kg8 25. Re1 Bd7 26. Qf6 Rf7 27. Qd8+ Kg7 28. h4 g4 29. Re7 Qa4 30. Rxf7+ Kxf7 31. Qe7+ Kg8 32. Qf6 Kh7 33. Qf7+ Kh8 34. h5 Qc6 35. Qf6+ Kg8 36. Qg6+ Kh8 37. Qxh6+ Kg8 38. Qg5+ Kf7 39. h6 f4 40. Qxf4+ Kg6 41. Bd8 1-0

[Event "NED-ch U14"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "1"]
[White "Sparenberg, Erik"]
[Black "Kowalczyk, Stefan"]
[Result "0-1"]
[ECO "C41"]
[PlyCount "99"]
[EventDate "1997.??.??"]
[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. Nf3 d6 3. h3 f5 4. Nc3 fxe4 5. Nxe4 d5 6. Ng3 e4 7. Nd4 Nf6 8. d3 c5 9. Nb3 exd3 10. cxd3 Bd6 11. Qe2+ Kf7 12. Qf3 Re8+ 13. Ne2 Nc6 14. Bf4 Nb4 15. 0-0-0 Nxa2+ 16. Kb1 Nb4 17. g4 Bxf4 18. Qxf4 Kg8 19. Nc3 d4 20. Nxc5 dxc3 21. Qxb4 cxb2 22. Qxb2 Qd5 23. Qa2 b6 24. Bg2 Qxa2+ 25. Kxa2 bxc5 26. Bxa8 Be6+ 27. Kb2 Rxa8 28. Rhe1 Bd7 29. d4 cxd4 30. Rxd4 Bc6 31. Re6 Bg2 32. Re3 Rb8+ 33. Ka3 h6 34. Rg3 Bd5 35. Rgd3 Rb5 36. f4 Bc6 37. Rc3 Rd5 38. Rdc4 Bb5 39. Rc8+ Kh7 40. Kb4 a6 41. Rf8 Rd4+ 42. Ka3 Rxf4 43. Rc7 Kg6 44. Rff7 Ra4+ 45. Kb3 Bc4+ 46. Rxc4 Rxc4 47. Rxf6+ Kxf6 48. Kxc4 Kg5 49. Kb4 Kh4 50. Ka5 0-1

[Event "NED-ch U14"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "9"]
[White "Van der Heyden, An"]
[Black "Kowalczyk, Stefan"]
[Result "1/2-1/2"]
[ECO "B22"]
[PlyCount "43"]
[EventDate "1997.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. e3 cxd4 4. exd4 d5 5. Nf3 e6 6. Nc3 Bb4 7. a3 Be7 8. Bg5 dxc4 9. Bxc4 0-0 10. 0-0 Nc6 11. Rc1 a6 12. Qd2 b5 13. Ba2 h6 14. Bh4 Qb6 15. Rfd1 Rd8 16. d5 Rd7 17. Qe2 Nd8 18. dxe6 Rxd1+ 19. Rxd1 Bxe6 20. Bxf6 Bxf6 21. Nd5 Bxd5 22. Qe8+ 1/2-1/2

