[Event "NED-chT"]
[Site "Netherlands"]
[Date "1997.??.??"]
[Round "7"]
[White "Dieks, Roy G"]
[Black "Nieuwenhuis, Pieter"]
[Result "1/2-1/2"]
[ECO "B39"]
[WhiteElo "2270"]
[BlackElo "2315"]
[PlyCount "128"]
[EventDate "1997.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. c4 Nc6 6. Be3 Nf6 7. Nc3 Ng4 8. Qxg4 Nxd4 9. Qd1 e5 10. Bd3 0-0 11. 0-0 d6 12. Qd2 Be6 13. Bh6 f5 14. Bxg7 Kxg7 15. exf5 gxf5 16. f4 e4 17. Bxe4 Qb6 18. Kh1 fxe4 19. Na4 Qc6 20. Qxd4+ Rf6 21. Nc3 Qxc4 22. Qxd6 Re8 23. Rae1 e3 24. Qd1 Rxf4 25. Rxf4 Qxf4 26. Rf1 Bg4 27. Qe1 Qc4 28. h3 Bh5 29. Qg3+ Bg6 30. Re1 Qe6 31. Nd1 Qxa2 32. Nxe3 Kg8 33. h4 Qa5 34. b4 Qe5 35. Qf2 Rf8 36. Qa2+ Bf7 37. Qe2 Be6 38. Nc2 Qxe2 39. Rxe2 Bd5 40. Re5 Bc6 41. b5 Bd7 42. Nd4 Rf4 43. Rd5 Rxh4+ 44. Kg1 Be8 45. Rd8 Kf8 46. Nf5 Rf4 47. Nd6 Ke7 48. Nxb7 Bxb5 49. Ra8 Rd4 50. Nc5 Bc6 51. Rh8 Rh4 52. Nb3 Kd6 53. g3 Rh3 54. Kf2 Kc7 55. Nd4 Bb7 56. Ne6+ Kc6 57. Rb8 Rh2+ 58. Ke3 Rb2 59. Rh8 Rb3+ 60. Kf2 Kd6 61. Nd4 Rb4 62. Ke3 a5 63. Rxh7 a4 64. Rh5 Rb6 1/2-1/2

[Event "NED-chT 9697"]
[Site "Netherlands"]
[Date "1996.??.??"]
[Round "?"]
[White "Dieks, Roy G"]
[Black "Homs, Guust"]
[Result "1-0"]
[ECO "C63"]
[WhiteElo "2270"]
[PlyCount "117"]
[EventDate "1996.??.??"]
[EventType "team"]
[EventRounds "11"]
[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 f5 4. d3 fxe4 5. dxe4 Nf6 6. 0-0 d6 7. Bc4 Bg4 8. h3 Bh5 9. Bg5 h6 10. Bxf6 Qxf6 11. Nbd2 Nd4 12. Be2 Nxe2+ 13. Qxe2 0-0-0 14. a4 g5 15. a5 Be8 16. Qe3 Kb8 17. Rfe1 Be7 18. Nc4 h5 19. a6 b6 20. Nh2 g4 21. Na5 gxh3 22. Qxh3 d5 23. Nb7 Rd7 24. Nf3 Rg8 25. Kh1 Rg4 26. exd5 Rxd5 27. Rad1 Rxd1 28. Rxd1 e4 29. Nh2 Rh4 30. Qg3 Qf4 31. Nd8 Bd6 32. Nc6+ Kc8 33. Kg1 Qxg3 34. fxg3 Rxh2 35. Nd4 h4 36. Kxh2 Bxg3+ 37. Kg1 Bh5 38. Ra1 e3 39. Kf1 c5 40. Ne2 Bf2 41. Nf4 Bf7 42. Nd3 Bc4 43. Ke2 Kc7 44. b3 Bxd3+ 45. Kxd3 b5 46. c4 Kb6 47. Ke2 Bg3 48. Kxe3 Be5 49. Ra2 Bc3 50. Ke4 Bd4 51. Kd5 Bg1 52. cxb5 Kxb5 53. Ra4 Bd4 54. Kd6 Kb6 55. Kd7 Bf2 56. Rf4 Bg3 57. Rf6+ Kb5 58. Kc8 Kb4 59. Kb7 1-0

[Event "NED-chT 9697"]
[Site "Netherlands"]
[Date "1996.??.??"]
[Round "?"]
[White "Dieks, Roy G"]
[Black "Jonker, Marc"]
[Result "0-1"]
[ECO "A53"]
[WhiteElo "2270"]
[BlackElo "2300"]
[PlyCount "104"]
[EventDate "1996.??.??"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. Nf3 d6 2. d4 Bg4 3. e3 Nd7 4. Be2 Ngf6 5. h3 Bh5 6. 0-0 e5 7. c4 c6 8. Nc3 Be7 9. Nh4 Bxe2 10. Qxe2 g6 11. Nf3 0-0 12. e4 exd4 13. Nxd4 Re8 14. Bh6 Qb6 15. Rad1 Nc5 16. Rfe1 Nfd7 17. b3 Bf6 18. Qf3 a5 19. Qg3 Ne5 20. Nf5 Ned3 21. Na4 Nxa4 22. Rxd3 Be5 23. Bf4 Nc5 24. Rde3 Qc7 25. Bxe5 dxe5 26. Rf3 f6 27. Nh6+ Kg7 28. Ng4 Rf8 29. Qh4 Qe7 30. Rg3 Rad8 31. Ne3 Kg8 32. Nf5 Qd7 33. Qh6 Ne6 34. h4 Nf4 35. h5 g5 36. Rg4 Kh8 37. g3 Ne6 38. Kg2 Nd4 39. Nxd4 exd4 40. Kh3 d3 41. e5 d2 42. Rd1 Rf7 43. exf6 Rg8 44. Rxd2 Qxd2 45. f4 gxf4 46. Rxg8+ Kxg8 47. Qg5+ Kh8 48. Qe5 Qd8 49. Qxf4 Qxf6 50. Qb8+ Kg7 51. Qa7 Qf5+ 52. g4 Qf3+ 0-1

[Event "NED-chT 9697"]
[Site "Netherlands"]
[Date "1996.??.??"]
[Round "?"]
[White "Kroeze, Frank"]
[Black "Dieks, Roy G"]
[Result "0-1"]
[ECO "B53"]
[WhiteElo "2390"]
[BlackElo "2270"]
[PlyCount "70"]
[EventDate "1996.??.??"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 bxc6 7. 0-0 e5 8. Qd3 f5 9. exf5 Nf6 10. Nc3 Be7 11. Ng5 d5 12. Qg3 e4 13. f3 exf3 14. Rxf3 0-0 15. Ne6 Bxe6 16. fxe6 Bc5+ 17. Kh1 d4 18. Na4 Ne4 19. Qe5 Qh4 20. Bh6 Qg4 21. Raf1 Bd6 22. Qa5 gxh6 23. Qa6 Rxf3 24. Rxf3 Qh4 25. g3 Nxg3+ 26. Kg1 Ne4 27. Qe2 Kh8 28. e7 Rg8+ 29. Kf1 Qxe7 30. Qd3 c5 31. c3 Bxh2 32. cxd4 Ng3+ 33. Kg2 Nf5+ 34. Kf2 Qh4+ 35. Ke2 Nxd4+ 0-1

[Event "NED-chT 9697"]
[Site "Netherlands"]
[Date "1996.??.??"]
[Round "?"]
[White "Slingerland, Fred"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "B82"]
[WhiteElo "2295"]
[BlackElo "2270"]
[PlyCount "75"]
[EventDate "1996.??.??"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 e6 7. Qf3 Qc7 8. Be3 b5 9. Bd3 Bb7 10. g4 Be7 11. g5 Nfd7 12. Qh3 g6 13. 0-0 b4 14. Nce2 Nc5 15. f5 gxf5 16. exf5 e5 17. Nb3 Bxg5 18. Bxg5 Rg8 19. Qh6 e4 20. Ng3 Nbd7 21. Rae1 d5 22. Bf4 Qc8 23. Be2 Nxb3 24. cxb3 Qc5+ 25. Be3 d4 26. Rc1 Qe5 27. Bf4 Qxf5 28. Bc4 e3 29. Bxe3 Bf3 30. Bxd4 Kd8 31. Bb6+ Ke7 32. Rce1+ Ne5 33. Bd4 f6 34. Bxe5 fxe5 35. Rxf3 Qxf3 36. Bxg8 Rxg8 37. Qxh7+ Kf8 38. Rf1 1-0

[Event "NED-chT 9596"]
[Site "Netherlands"]
[Date "1995.??.??"]
[Round "?"]
[White "Burlage, Peter"]
[Black "Dieks, Roy G"]
[Result "0-1"]
[ECO "B87"]
[BlackElo "2270"]
[PlyCount "56"]
[EventDate "1995.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Bb3 b5 8. 0-0 Be7 9. Qf3 Qb6 10. Be3 Qb7 11. a3 0-0 12. Bg5 h6 13. Bh4 Nbd7 14. Rae1 Nc5 15. Qh3 g5 16. f4 gxh4 17. Qxh4 Nfxe4 18. Qxh6 Bf6 19. Nf3 Bg7 20. Qh4 d5 21. f5 Nf6 22. Ba2 exf5 23. Ng5 Be6 24. g4 d4 25. Rxe6 fxe6 26. Nxe6 Nxe6 27. Bxe6+ Rf7 28. Rxf5 dxc3 0-1

[Event "NED-chT 9596"]
[Site "Netherlands"]
[Date "1995.??.??"]
[Round "?"]
[White "Dieks, Roy G"]
[Black "Carlier, Bruno"]
[Result "1/2-1/2"]
[ECO "B08"]
[WhiteElo "2270"]
[BlackElo "2350"]
[PlyCount "78"]
[EventDate "1995.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 c6 4. Nf3 d6 5. a4 Nf6 6. h3 0-0 7. Be2 Qc7 8. 0-0 e5 9. Be3 Nbd7 10. Qd2 exd4 11. Nxd4 Nc5 12. f3 Nh5 13. Bh6 d5 14. Bxg7 Nxg7 15. exd5 Rd8 16. Bc4 Nf5 17. Nxf5 Bxf5 18. b4 Qb6 19. bxc5 Qxc5+ 20. Kh1 Qxc4 21. d6 Kg7 22. g4 Be6 23. Rad1 Rd7 24. Qe3 Rad8 25. Rfe1 Bd5 26. Nxd5 cxd5 27. Qe5+ f6 28. Qxd5 Qxd5 29. Rxd5 Kf7 30. Rb5 Rc8 31. Reb1 b6 32. a5 Rxd6 33. axb6 axb6 34. Rxb6 Rxb6 35. Rxb6 Rxc2 36. Rb7+ Ke6 37. Kg1 Ke5 38. Rb4 f5 39. Ra4 Rb2 1/2-1/2

[Event "NED-chT 9596"]
[Site "Netherlands"]
[Date "1995.??.??"]
[Round "?"]
[White "Dieks, Roy G"]
[Black "De Graaff, Rudolf"]
[Result "1-0"]
[ECO "A42"]
[WhiteElo "2270"]
[PlyCount "105"]
[EventDate "1995.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. c4 Nd7 5. Nc3 e5 6. Be2 Ne7 7. 0-0 0-0 8. Be3 f5 9. exf5 Rxf5 10. Ng5 Nf8 11. dxe5 Rxe5 12. Qd2 Ne6 13. Nxe6 Rxe6 14. Bg4 Rxe3 15. Bxc8 Re5 16. f4 Rh5 17. Bxb7 Rb8 18. Bf3 Rh6 19. g4 Rh4 20. Rae1 Kh8 21. b3 h5 22. g5 Qd7 23. Re4 Rf8 24. Bg2 Nf5 25. Rfe1 c5 26. h3 Nd4 27. Qf2 Rxh3 28. Bxh3 Qxh3 29. R1e3 Qg4+ 30. Qg3 Qc8 31. Qh3 Nf5 32. Re2 Nd4 33. Rh2 Qa6 34. Nd5 Qa3 35. Re1 Qa5 36. Rf1 Nf5 37. Re2 Bd4+ 38. Kh2 Kg7 39. Ne7 Qd8 40. Nxf5+ Rxf5 41. Re4 d5 42. cxd5 Qxd5 43. Rfe1 Kh7 44. Re7+ Bg7 45. Qc3 Rf7 46. Rxf7 Qxf7 47. Qc4 Qd7 48. Re2 Qg4 49. Re3 Qh4+ 50. Kg2 Qg4+ 51. Rg3 Qf5 52. Kf3 h4 53. Rg4 1-0

[Event "NED-chT 9596"]
[Site "Netherlands"]
[Date "1995.??.??"]
[Round "?"]
[White "Dieks, Roy G"]
[Black "Kroeze, Frank"]
[Result "1/2-1/2"]
[ECO "C42"]
[WhiteElo "2270"]
[BlackElo "2400"]
[PlyCount "41"]
[EventDate "1995.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nc3 Bb4 4. Nxe5 0-0 5. Nd3 Bxc3 6. dxc3 Nxe4 7. Be2 d5 8. 0-0 Re8 9. Nf4 c6 10. Be3 Nd6 11. Bd3 Bf5 12. Bc5 Bxd3 13. cxd3 b6 14. Bxd6 Qxd6 15. Qg4 Na6 16. Rfe1 Nc7 17. Nh5 g6 18. Qg5 Rxe1+ 19. Rxe1 Re8 20. Rxe8+ Nxe8 21. Qe3 1/2-1/2

[Event "NED-chT 9596"]
[Site "Netherlands"]
[Date "1995.??.??"]
[Round "?"]
[White "Haring, Ronald"]
[Black "Dieks, Roy G"]
[Result "0-1"]
[ECO "E16"]
[BlackElo "2270"]
[PlyCount "64"]
[EventDate "1995.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Bxd2+ 7. Qxd2 0-0 8. Nc3 Ne4 9. Qc2 Nxc3 10. Qxc3 d6 11. 0-0 Nd7 12. Rfd1 f5 13. b4 Nf6 14. c5 Bd5 15. Nd2 Bxg2 16. Kxg2 Nd5 17. Qb3 f4 18. Ne4 Qe8 19. Nc3 fxg3 20. Nxd5 Rxf2+ 21. Kxg3 Qf7 22. Rd3 Rxe2 23. Nf4 Re4 24. Rf1 Rf8 25. Nxe6 Qxf1 26. Nxf8+ Kh8 27. Qd1 Re3+ 28. Kg4 Qg2+ 29. Kf4 Qe4+ 30. Kg5 h6+ 31. Kh5 Qf5+ 32. Kh4 Qg5# 0-1

[Event "NED-chT 9596"]
[Site "Netherlands"]
[Date "1995.??.??"]
[Round "?"]
[White "Lanchava, Tea"]
[Black "Dieks, Roy G"]
[Result "0-1"]
[ECO "E21"]
[WhiteElo "2200"]
[BlackElo "2270"]
[PlyCount "88"]
[EventDate "1995.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 0-0 5. g3 b6 6. Bg2 Bb7 7. 0-0 d6 8. d5 Bxc3 9. bxc3 e5 10. Nd2 Nbd7 11. e4 Nc5 12. Ba3 Nfd7 13. f4 exf4 14. gxf4 Re8 15. Qc2 Ba6 16. Rf3 f5 17. Rh3 Qf6 18. exf5 Re2 19. Bf1 Re7 20. Bxc5 Nxc5 21. Nb3 Rae8 22. Nxc5 dxc5 23. Bd3 Bb7 24. Rd1 c6 25. Bf1 Bc8 26. Rh5 Qf7 27. Rg5 h6 28. Rg3 Bxf5 29. Qf2 Be4 30. d6 Rd7 31. Bh3 Bf5 32. Bg2 Red8 33. Bxc6 Rxd6 34. Rxd6 Rxd6 35. Bd5 Be6 36. Bxe6 Qxe6 37. Qf1 Qf5 38. Rg2 Rd3 39. Rg3 Rd6 40. h3 Qc2 41. Re3 Rd1 42. Re1 Qg6+ 43. Kh2 Rd2+ 44. Re2 Qd3 0-1

[Event "NED-chT 9596"]
[Site "Netherlands"]
[Date "1995.??.??"]
[Round "?"]
[White "Van Dijk, Harold"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "B15"]
[BlackElo "2270"]
[PlyCount "99"]
[EventDate "1995.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 e6 4. Nf3 Bb4 5. Bd2 Bxc3 6. Bxc3 dxe4 7. Ne5 Nf6 8. Bb4 Nd5 9. Ba3 b5 10. c3 a5 11. Bc5 Na6 12. Qg4 Nxc5 13. dxc5 0-0 14. Qxe4 f6 15. Nxc6 Qc7 16. Bxb5 Bb7 17. Qxe6+ Kh8 18. 0-0 Nf4 19. Qd6 Rac8 20. Rfd1 Rfe8 21. Qxc7 Rxc7 22. Nxa5 Rxc5 23. Bxe8 Rxa5 24. Rd8 Ne6 25. Rb8 Ra8 26. Rxb7 Rxe8 27. Re1 Kg8 28. Rb6 Kf7 29. Rbxe6 Rxe6 30. Rxe6 Kxe6 31. Kf1 Kd5 32. Ke2 Kc4 33. Kd2 g5 34. b3+ Kc5 35. Kd3 f5 36. a4 Kd5 37. b4 f4 38. c4+ Ke5 39. a5 h5 40. a6 g4 41. g3 h4 42. a7 fxg3 43. fxg3 hxg3 44. hxg3 Kd6 45. a8Q Ke5 46. Qc6 Kf5 47. Kd4 Kg5 48. Ke5 Kh5 49. Kf6 Kh6 50. Qh1# 1-0

[Event "NED-chT 9596"]
[Site "Netherlands"]
[Date "1995.??.??"]
[Round "?"]
[White "Van den Brink, Peter"]
[Black "Dieks, Roy G"]
[Result "1/2-1/2"]
[ECO "A22"]
[WhiteElo "2190"]
[BlackElo "2270"]
[PlyCount "70"]
[EventDate "1995.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. g3 Bb4 4. Nd5 Nxd5 5. cxd5 0-0 6. a3 Bc5 7. Bg2 c6 8. b4 Bd4 9. Rb1 cxd5 10. Nf3 Bb6 11. Nxe5 Nc6 12. Nd3 d4 13. 0-0 d6 14. Nf4 Bf5 15. d3 Qd7 16. Nd5 Bh3 17. Bb2 Bxg2 18. Kxg2 Qe6 19. Nf4 Qf5 20. e4 dxe3 21. fxe3 Bxe3 22. Bxg7 Rfe8 23. Nh5 Qd5+ 24. Qf3 Qxf3+ 25. Rxf3 Nd4 26. Rxe3 Rxe3 27. Bxd4 Rxd3 28. Bf6 Rxa3 29. Rd1 Rb3 30. Rd4 b6 31. Rg4+ Kf8 32. Re4 Kg8 33. Rg4+ Kf8 34. Re4 Kg8 35. Rg4+ Kf8 1/2-1/2

[Event "NED-chTB 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "3"]
[White "Burlage, Peter"]
[Black "Dieks, Roy G"]
[Result "0-1"]
[ECO "B15"]
[BlackElo "2270"]
[PlyCount "80"]
[EventDate "1994.??.??"]
[EventType "team"]
[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. Nc3 e6 4. Nf3 Bb4 5. e5 Ne7 6. Bd3 c5 7. dxc5 Bxc5 8. 0-0 Nbc6 9. a3 Ng6 10. Re1 Qb6 11. Re2 Qc7 12. Nb5 Qb8 13. b4 Be7 14. Qe1 a6 15. Nbd4 Ngxe5 16. Rxe5 Nxe5 17. Nxe5 0-0 18. Bf4 Bd6 19. Qe2 Qc7 20. Rd1 f6 21. Qh5 g5 22. Ng6 Rf7 23. Bxd6 Qxd6 24. h4 hxg6 25. Qxg6+ Rg7 26. Qxf6 Qf4 27. hxg5 Qxg5 28. Qxg5 Rxg5 29. Re1 Kf7 30. Nf3 Rg7 31. Ne5+ Kf6 32. c4 dxc4 33. Nxc4 Bd7 34. Nb6 Rd8 35. Be4 Bb5 36. Rc1 Rd6 37. Nc8 Rd4 38. f3 Rd2 39. g4 Bd3 40. Nd6 Rd7 0-1

[Event "NED-chTB 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "1"]
[White "De Bie, Harrie"]
[Black "Dieks, Roy G"]
[Result "1/2-1/2"]
[ECO "B52"]
[BlackElo "2270"]
[PlyCount "89"]
[EventDate "1994.??.??"]
[EventType "team"]
[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. 0-0 Nc6 6. c3 Nf6 7. d4 Nxe4 8. d5 Ne5 9. Re1 f5 10. Nxe5 dxe5 11. f3 Nf6 12. Rxe5 0-0-0 13. c4 e6 14. Nc3 exd5 15. Nxd5 Bd6 16. Re2 Nxd5 17. Qxd5 Rhe8 18. Rxe8 Rxe8 19. Bg5 Be5 20. Qxd7+ Kxd7 21. Rd1+ Kc6 22. b3 Bd4+ 23. Kf1 h6 24. Bh4 f4 25. Bf2 Bxf2 26. Kxf2 Re3 27. Re1 Rxe1 28. Kxe1 Kd6 29. Kd2 Ke5 30. Kd3 g5 31. h3 h5 32. Kc3 b6 33. Kd3 Kf5 34. Ke2 g4 35. hxg4+ hxg4 36. Kd3 gxf3 37. gxf3 Ke5 38. Kc3 Kf5 39. Kd3 Ke5 40. Kc3 Ke6 41. Kd2 Kf6 42. Ke2 Kg5 43. Kd3 Kf5 44. Kc3 Kg5 45. Kd3 1/2-1/2

[Event "NED-chTB 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "6"]
[White "Dieks, Roy G"]
[Black "Blaauw, Casper"]
[Result "1-0"]
[ECO "C18"]
[WhiteElo "2270"]
[PlyCount "91"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Qc7 7. Nf3 b6 8. Bb5+ Bd7 9. Bd3 Ba4 10. 0-0 Ne7 11. Re1 Nbc6 12. Rb1 Rc8 13. dxc5 bxc5 14. c4 Rd8 15. Qe2 Nd4 16. Nxd4 cxd4 17. Rb4 Bc6 18. cxd5 Rxd5 19. Bb2 a5 20. Rxd4 Qb6 21. Rxd5 Nxd5 22. Bc1 Qd4 23. Bb5 Qc5 24. Bxc6+ Qxc6 25. c4 Ne7 26. Bd2 Qc7 27. Qd3 Nc6 28. Qg3 0-0 29. Bg5 f5 30. exf6 Qxg3 31. hxg3 gxf6 32. Rxe6 Ne5 33. Rxf6 Rb8 34. Rf4 h5 35. f3 Rc8 36. Kh2 Nxc4 37. a4 Kg7 38. Rf5 Rb8 39. Be7 Rb7 40. Rc5 Ne3 41. Bg5 Nd1 42. Rxa5 Rb1 43. Rb5 Ra1 44. Bd2 Ra2 45. Bf4 Rxa4 46. Rd5 1-0

[Event "NED-chTB 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "2"]
[White "Dieks, Roy G"]
[Black "Scholl, Eddie C"]
[Result "1-0"]
[ECO "B51"]
[WhiteElo "2270"]
[BlackElo "2385"]
[PlyCount "79"]
[EventDate "1994.??.??"]
[EventType "team"]
[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 d6 4. 0-0 Bd7 5. Re1 Nf6 6. c3 a6 7. Bf1 Bg4 8. h3 Bxf3 9. Qxf3 g6 10. Qd1 Bg7 11. d4 cxd4 12. cxd4 0-0 13. Nc3 Rc8 14. Be3 e6 15. Qd2 b5 16. a3 Na5 17. Rad1 Nc4 18. Bxc4 Rxc4 19. Bg5 Re8 20. Qf4 Nh5 21. Qh4 f6 22. Be3 Bf8 23. g4 Ng7 24. e5 fxe5 25. Qxd8 Rxd8 26. dxe5 d5 27. f4 Rdc8 28. Rd2 Bc5 29. Bxc5 R8xc5 30. Ne2 Re4 31. Kf2 Rcc4 32. b3 Rc7 33. Rd4 Rxd4 34. Nxd4 Kf7 35. Re2 Ke7 36. Rc2 Ne8 37. Rc6 Rxc6 38. Nxc6+ Kf7 39. Ke3 h6 40. Kd4 1-0

[Event "NED-chTB 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "9"]
[White "Dieks, Roy G"]
[Black "Van Oyen, Marcel"]
[Result "1-0"]
[ECO "B51"]
[WhiteElo "2270"]
[PlyCount "81"]
[EventDate "1994.??.??"]
[EventType "team"]
[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 Ngf6 5. Re1 a6 6. Bf1 g6 7. c3 Bg7 8. d4 0-0 9. e5 Ne8 10. Bg5 dxe5 11. dxe5 h6 12. Bh4 Nc7 13. Nbd2 Ne6 14. a4 b6 15. Bc4 Re8 16. Bxe6 fxe6 17. Qb3 Nf8 18. Nc4 g5 19. Bg3 Rb8 20. h4 g4 21. Nfd2 h5 22. Ne4 Bb7 23. Rad1 Qc7 24. Qc2 Qc6 25. f3 gxf3 26. gxf3 Rbd8 27. Kh2 Rxd1 28. Rxd1 Kh8 29. Ng5 Qc7 30. f4 Qc6 31. Rg1 Bh6 32. Qe2 Bxg5 33. Qxh5+ Nh7 34. hxg5 Kg7 35. f5 exf5 36. e6 Qxe6 37. Be5+ Kf8 38. Qxh7 Rd8 39. g6 Rd2+ 40. Nxd2 Qxe5+ 41. Kh3 1-0

[Event "NED-chTB 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "4"]
[White "Dieks, Roy G"]
[Black "Weijers, Freek"]
[Result "1-0"]
[ECO "B05"]
[WhiteElo "2270"]
[PlyCount "49"]
[EventDate "1994.??.??"]
[EventType "team"]
[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. d4 d6 4. Nf3 Bg4 5. Be2 e6 6. Ng5 Bxe2 7. Qxe2 Qd7 8. 0-0 Nc6 9. c4 Nb6 10. d5 Nxe5 11. f4 Nexc4 12. dxe6 fxe6 13. b3 Na5 14. Nxe6 Kf7 15. f5 Be7 16. Bb2 h5 17. Bxg7 Rh7 18. Nc3 Nc6 19. Ne4 Kg8 20. Rae1 d5 21. Nf6+ Bxf6 22. Bxf6 Re8 23. Qd2 Kf7 24. Ng5+ Kxf6 25. Nxh7+ 1-0

[Event "NED-chTB 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "8"]
[White "Maxwell, Daniel N"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "A14"]
[BlackElo "2270"]
[PlyCount "65"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 b6 3. g3 Bb7 4. Bg2 e6 5. 0-0 c5 6. Nc3 Be7 7. b3 0-0 8. Bb2 d5 9. cxd5 Nxd5 10. Nxd5 Qxd5 11. Ne1 Qd7 12. Bxb7 Qxb7 13. Nf3 Nd7 14. Qc2 Bf6 15. Rac1 e5 16. d3 e4 17. dxe4 Bxb2 18. Qxb2 Qxe4 19. Rfd1 Nf6 20. Rd2 Rfe8 21. Rc4 Qe6 22. e3 Ne4 23. Rd1 Rad8 24. Rxd8 Rxd8 25. Qe5 Qh3 26. Rc1 Qg4 27. Qe7 Rf8 28. Kg2 f5 29. Rd1 h6 30. Rd7 Nf6 31. h3 Qg6 32. Ne5 Qh7 33. Rd8 1-0

[Event "NED-chTB 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "5"]
[White "Schoonderwoerd, Nico"]
[Black "Dieks, Roy G"]
[Result "0-1"]
[ECO "C00"]
[BlackElo "2270"]
[PlyCount "62"]
[EventDate "1994.??.??"]
[EventType "team"]
[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. Nd2 e6 4. Ngf3 Nf6 5. Bd3 Be7 6. e5 Nh5 7. Nf1 f5 8. exf6 Nxf6 9. Ng3 0-0 10. 0-0 c5 11. c3 Nc6 12. Re1 Bd6 13. Ne5 Qc7 14. Bf4 cxd4 15. Nxc6 Bxf4 16. Nxd4 e5 17. Ndf5 e4 18. Bc2 Bxf5 19. Nxf5 Bxh2+ 20. Kh1 Qf4 21. Ne3 Qh4 22. Nf5 Qg5 23. Ne3 Bf4 24. Kg1 Bxe3 25. Rxe3 Ng4 26. Rg3 h5 27. Qd4 e3 28. fxe3 Qh4 29. Qxd5+ Kh8 30. Rf3 Qh2+ 31. Kf1 Nxe3+ 0-1

[Event "Lugano Open-10"]
[Site "Lugano"]
[Date "1985.03.??"]
[Round "2"]
[White "Dieks, Roy G"]
[Black "Sosonko, Gennadi"]
[Result "1-0"]
[ECO "B20"]
[WhiteElo "2270"]
[BlackElo "2535"]
[PlyCount "59"]
[EventDate "1985.03.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SUI"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. b3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. Qe2 Nc6 6. Nf3 Nf6 7. 0-0 g6 8. c3 Bg7 9. d4 d5 10. Ne5 Qe6 11. Nxc6 Qxc6 12. e5 Nd7 13. Bg5 h6 14. Bh4 e6 15. Na3 a6 16. Nc2 Rc8 17. Ne3 h5 18. Rad1 cxd4 19. cxd4 Qb5 20. Rd3 0-0 21. a4 Qb4 22. g4 hxg4 23. Nxg4 Rfe8 24. Qe3 Rc7 25. Bf6 Qf8 26. Qg5 Rec8 27. Rh3 Rc3 28. f3 Qb4 29. Bxg7 Qxd4+ 30. Kh1 1-0

[Event "Lugano Open-10"]
[Site "Lugano"]
[Date "1985.03.??"]
[Round "3"]
[White "Giorgadze, Tamaz"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "E21"]
[WhiteElo "2500"]
[BlackElo "2270"]
[PlyCount "67"]
[EventDate "1985.03.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SUI"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb4 5. Qb3 Qe7 6. g3 Bb7 7. Bg2 0-0 8. 0-0 Rc8 9. Bg5 Bxc3 10. Qxc3 d6 11. d5 Nbd7 12. Nd4 Rab8 13. dxe6 fxe6 14. Bxb7 Rxb7 15. Nc6 Qf7 16. Qf3 d5 17. Bxf6 Nxf6 18. Qa3 Qd7 19. Ne7+ Kf7 20. Nxc8 Qxc8 21. c5 bxc5 22. Qxc5 e5 23. b3 Qh3 24. f3 h5 25. Rac1 Kg6 26. Qe7 Qf5 27. Rc6 d4 28. Rfc1 Qg5 29. f4 exf4 30. R1c5 Qg4 31. Qe4+ Kf7 32. Rxf6+ Kxf6 33. Qxb7 Qxe2 34. Qc6+ 1-0

[Event "NED-chT 8182"]
[Site "Netherlands"]
[Date "1982.??.??"]
[Round "?"]
[White "De Savornin Lohman, A."]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "C14"]
[BlackElo "2270"]
[PlyCount "55"]
[EventDate "1981.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. f4 a6 8. Nf3 c5 9. dxc5 Qxc5 10. Qd2 Nc6 11. 0-0-0 b5 12. Ne2 0-0 13. Ned4 Nb6 14. Nxc6 Qxc6 15. Bd3 Qc7 16. Qf2 f5 17. Rhg1 b4 18. g4 a5 19. gxf5 exf5 20. Rg2 a4 21. Rdg1 Rf7 22. Ng5 Re7 23. Qh4 h6 24. Qxh6 gxh6 25. Ne6+ Kf7 26. Nxc7 Be6 27. Rg7+ Kf8 28. Nxe6+ 1-0

[Event "NED Open-ch10 Reinbouw"]
[Site "Dieren"]
[Date "1979.08.08"]
[Round "8"]
[White "Etmans, Maarten D"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "B44"]
[BlackElo "2300"]
[PlyCount "115"]
[EventDate "1979.07.31"]
[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 e6 3. c4 Nc6 4. Nc3 Nf6 5. d4 cxd4 6. Nxd4 Bb4 7. Nxc6 bxc6 8. Bd3 Qc7 9. Bd2 Rb8 10. Rb1 h5 11. h3 Rg8 12. a3 Bd6 13. Qa4 g5 14. Ne2 c5 15. b4 Bb7 16. Qc2 h4 17. Bc3 Nh5 18. f3 Ng3 19. Nxg3 Bxg3+ 20. Ke2 d6 21. Rb2 Ke7 22. Rhb1 cxb4 23. axb4 d5 24. c5 f5 25. exf5 g4 26. hxg4 e5 27. f6+ Kxf6 28. Bh7 Rg7 29. Qf5+ Ke7 30. Bg6 Rf8 31. Qh5 Rf6 32. Bf5 d4 33. Bd2 e4 34. fxe4 Ba6+ 35. Kd1 Bd3 36. Bg5 Qe5 37. Ra1 a6 38. Qh6 Rxg5 39. Qxg5 Kf8 40. Qh5 Bb5 41. Qh8+ Ke7 42. Qg7+ Rf7 43. Qxe5+ Bxe5 44. Rba2 Rf6 45. Ra5 Bf1 46. c6 Bc7 47. Rxa6 Bxg2 48. g5 Rf8 49. Ra8 h3 50. Rxf8 Kxf8 51. Bxh3 Bxh3 52. Ra7 Bf4 53. c7 Bg4+ 54. Kc2 Bxg5 55. Ra8+ Ke7 56. Rg8 Be2 57. Rxg5 d3+ 58. Kd2 1-0

[Event "NED Open-ch10 Reinbouw"]
[Site "Dieren"]
[Date "1979.08.03"]
[Round "4"]
[White "Renet, Jacques"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "A00"]
[BlackElo "2300"]
[PlyCount "151"]
[EventDate "1979.07.31"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. g3 e5 2. Bg2 d5 3. d3 c6 4. Nf3 Bd6 5. 0-0 Ne7 6. c4 0-0 7. Nc3 d4 8. Ne4 Bc7 9. b4 f5 10. Nc5 b6 11. Nb3 h6 12. e3 dxe3 13. fxe3 Be6 14. Qe2 Nd7 15. Bb2 a5 16. a3 c5 17. bxc5 bxc5 18. Nbd2 Rb8 19. Rab1 Ng6 20. Ba1 Nf6 21. Rxb8 Bxb8 22. Ne1 h5 23. Ndf3 Ng4 24. h3 Nh6 25. h4 f4 26. exf4 Nf5 27. Kh2 Nxg3 28. Kxg3 Nxf4 29. Qb2 Nxd3 30. Nxd3 Qxd3 31. Kh2 Qxc4 32. Nxe5 Qxh4+ 33. Kg1 Rxf1+ 34. Kxf1 Qf4+ 35. Nf3 Qf8 36. Kg1 Bf4 37. Qe2 Bg4 38. Qe4 Qd6 39. Qe8+ Qf8 40. Qe4 Qf5 41. Qe8+ Kh7 42. Nh4 Qb1+ 43. Bf1 Bg5 44. Qf7 Be3+ 45. Kh2 Qc2+ 46. Kg3 Bd4 47. Bxd4 cxd4 48. Qc4 Qxc4 49. Bxc4 g5 50. Nf3 Kh6 51. Nxd4 Bd7 52. Bb5 Bc8 53. Bc6 h4+ 54. Kg2 g4 55. Nb3 a4 56. Nc5 Kg5 57. Nxa4 Kf4 58. Nb6 h3+ 59. Kg1 Be6 60. a4 g3 61. a5 Bg4 62. Nd5+ Ke5 63. Nb4 Be2 64. a6 Bxa6 65. Nxa6 Kf4 66. Bd7 h2+ 67. Kg2 Ke3 68. Bc6 h1Q+ 69. Kxh1 Kf2 70. Bg2 Ke3 71. Kg1 Ke2 72. Nc5 Ke3 73. Kf1 Kf4 74. Ke2 Kg4 75. Ke3 Kh4 76. Kf4 1-0

[Event "NED Open-ch10 Reinbouw"]
[Site "Dieren"]
[Date "1979.08.01"]
[Round "2"]
[White "Dieks, Roy G"]
[Black "Van Eybergen, Jan"]
[Result "1-0"]
[ECO "A09"]
[WhiteElo "2300"]
[PlyCount "15"]
[EventDate "1979.07.31"]
[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. c4 Nc6 3. cxd5 Qxd5 4. Nc3 Qa5 5. a3 e5 6. Rb1 Nf6 7. b4 Qb6 8. Na4 1-0

[Event "NED Open-ch09 Reinbouw"]
[Site "Velp"]
[Date "1978.08.??"]
[Round "3"]
[White "Dieks, Roy G"]
[Black "Nimtz, Manfred"]
[Result "1/2-1/2"]
[ECO "D85"]
[WhiteElo "2250"]
[PlyCount "87"]
[EventDate "1978.08.??"]
[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 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 0-0 8. Be2 c5 9. 0-0 b6 10. Be3 Bb7 11. Qc2 Qc7 12. d5 Nd7 13. Rad1 Rad8 14. c4 Rfe8 15. Ng5 h6 16. Nh3 e5 17. f3 Rf8 18. Bd3 Nf6 19. Qf2 Qe7 20. Qd2 Kh7 21. Nf2 Bc8 22. a4 Ne8 23. a5 f5 24. f4 Nd6 25. fxe5 Qxe5 26. exf5 Bxf5 27. axb6 axb6 28. Bf4 Qd4 29. Bxd6 Rxd6 30. Bxf5 Rxf5 31. Qe2 Qh4 32. g3 Qd8 33. Ne4 Rxf1+ 34. Rxf1 Rd7 35. Qg4 Ra7 36. d6 Qe8 37. Rd1 Rd7 38. Kg2 h5 39. Qf3 Kh8 40. Re1 Rxd6 41. Nf6 Qf8 42. Re8 Rxf6 43. Rxf8+ Rxf8 44. Qc6 1/2-1/2

[Event "NED Open-ch09 Reinbouw"]
[Site "Velp"]
[Date "1978.08.??"]
[Round "1"]
[White "Dieks, Roy G"]
[Black "Prins, Henk Jan"]
[Result "1/2-1/2"]
[ECO "C06"]
[WhiteElo "2250"]
[PlyCount "146"]
[EventDate "1978.08.??"]
[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 e6 2. d4 d5 3. Nd2 c5 4. Ngf3 Nf6 5. e5 Nfd7 6. c3 Nc6 7. Bd3 cxd4 8. cxd4 Qb6 9. 0-0 Nxd4 10. Nxd4 Qxd4 11. Nf3 Qb6 12. Qa4 Qb4 13. Qc2 Nc5 14. Bd2 Qb6 15. Be3 Bd7 16. Rac1 Rc8 17. Qb1 Qd8 18. Bxh7 Bb5 19. Rfe1 Be7 20. Bc2 a5 21. Nd4 Ba6 22. f4 Kd7 23. b3 Rh6 24. a3 Qh8 25. Nf3 Bh4 26. Bf2 Bxf2+ 27. Kxf2 Bb5 28. b4 axb4 29. axb4 Na6 30. Bd3 Bxd3 31. Qxd3 Nc7 32. Qd4 Na8 33. Qa7 Rb8 34. Rc5 Qd8 35. Rec1 Rh8 36. Rb5 Nc7 37. Rxb7 Rxb7 38. Qxb7 Qb8 39. Qc6+ Kd8 40. b5 Nxb5 41. Rb1 Qa7+ 42. Kg3 g5 43. Qxb5 gxf4+ 44. Kxf4 Kc7 45. Rc1+ Kd8 46. Qc6 Qb8 47. Qd6+ Qxd6 48. exd6 f6 49. Ke3 Kd7 50. h4 Kxd6 51. Rh1 e5 52. h5 d4+ 53. Ke4 Ke6 54. h6 f5+ 55. Kd3 e4+ 56. Kxd4 exf3 57. gxf3 Rh7 58. f4 Kf6 59. Kd5 Rd7+ 60. Kc6 Rh7 61. Kd6 Rh8 62. h7 Rd8+ 63. Kc7 Rh8 64. Kd7 Kg6 65. Rg1+ Kf6 66. Rh1 Kg6 67. Ke6 Re8+ 68. Kd7 Rh8 69. Ke7 Rxh7+ 70. Rxh7 Kxh7 71. Kf6 Kg8 72. Kg6 Kf8 73. Kxf5 Kf7 1/2-1/2

[Event "NED Open-ch09 Reinbouw"]
[Site "Velp"]
[Date "1978.08.??"]
[Round "4"]
[White "Dieks, Roy G"]
[Black "Stam, Bart"]
[Result "1-0"]
[ECO "B99"]
[WhiteElo "2250"]
[PlyCount "67"]
[EventDate "1978.08.??"]
[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. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. 0-0-0 Nbd7 10. g4 b5 11. Bxf6 Nxf6 12. g5 Nd7 13. a3 Bb7 14. h4 Nb6 15. Bh3 Bc8 16. f5 e5 17. Nde2 Bd7 18. f6 gxf6 19. gxf6 Bf8 20. Bxd7+ Qxd7 21. Nd5 Nxd5 22. Rxd5 Rc8 23. Ng3 b4 24. Kb1 Qa4 25. b3 Qc6 26. Qd3 bxa3 27. c4 Rg8 28. Nf5 Rg2 29. Nxd6+ Bxd6 30. Rxd6 Qc5 31. Rd1 Qa5 32. Rc6 Rd8 33. Rc8 Rd2 34. Rxd2 1-0

[Event "NED Open-ch09 Reinbouw"]
[Site "Velp"]
[Date "1978.08.??"]
[Round "5"]
[White "Knol, Dirk L"]
[Black "Dieks, Roy G"]
[Result "1/2-1/2"]
[ECO "E17"]
[WhiteElo "2280"]
[BlackElo "2250"]
[PlyCount "69"]
[EventDate "1978.08.??"]
[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. g3 b6 3. Bg2 Bb7 4. 0-0 e6 5. c4 Be7 6. Nc3 0-0 7. Re1 d5 8. cxd5 exd5 9. d4 Nbd7 10. Bg5 Ne4 11. Bxe7 Qxe7 12. Rc1 Ndf6 13. e3 Ng4 14. Nxe4 dxe4 15. Nd2 f5 16. Nxe4 fxe4 17. Qxg4 Qf7 18. Rc2 Rae8 19. Rec1 Re7 20. b3 Bd5 21. Bf1 c6 22. Qe2 b5 23. Rc5 Re6 24. R1c2 Rf6 25. Qe1 a6 26. Bg2 g5 27. Qe2 Kh8 28. Rd2 h5 29. Rcc2 Kg7 30. Qe1 g4 31. Re2 Rh6 32. Qa5 h4 33. Qxa6 hxg3 34. hxg3 Qh5 35. Qb7+ 1/2-1/2

[Event "NED Open-ch09 Reinbouw"]
[Site "Velp"]
[Date "1978.08.??"]
[Round "7"]
[White "Renet, Jacques"]
[Black "Dieks, Roy G"]
[Result "0-1"]
[ECO "D02"]
[BlackElo "2250"]
[PlyCount "80"]
[EventDate "1978.08.??"]
[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. Bf4 e6 4. e3 Be7 5. Bd3 Nbd7 6. Nbd2 Nh5 7. 0-0 Nxf4 8. exf4 0-0 9. Ne5 Nxe5 10. fxe5 c5 11. c3 cxd4 12. cxd4 Qb6 13. Nb3 Bd7 14. Rc1 Rac8 15. Qd2 Bb4 16. Qe3 a5 17. Nd2 g6 18. Nf3 Be7 19. h4 Qxb2 20. Rb1 Qa3 21. Rb3 Qxa2 22. Rxb7 Qa4 23. Qh6 Rc3 24. h5 Rxd3 25. Ng5 Bxg5 26. Qxg5 Rd1 27. g4 Rxf1+ 28. Kxf1 Qd1+ 29. Kg2 h6 30. Qxh6 Qxg4+ 31. Kh2 Qxh5+ 32. Qxh5 gxh5 33. Rxd7 Ra8 34. Rc7 a4 35. Rc2 a3 36. Ra2 Kg7 37. Kg3 Kg6 38. Kf4 Ra4 39. Ke3 Kf5 40. f3 h4 0-1

[Event "NED Open-ch09 Reinbouw"]
[Site "Velp"]
[Date "1978.08.??"]
[Round "2"]
[White "Willemsen, Jos"]
[Black "Dieks, Roy G"]
[Result "0-1"]
[ECO "B30"]
[BlackElo "2250"]
[PlyCount "82"]
[EventDate "1978.08.??"]
[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 Qc7 4. 0-0 a6 5. Bxc6 Qxc6 6. Re1 d6 7. h3 e6 8. c3 Nf6 9. Qe2 c4 10. b3 cxb3 11. axb3 Qb6 12. b4 Be7 13. d3 0-0 14. Be3 Qc7 15. b5 b6 16. c4 a5 17. Nc3 Bb7 18. Na4 Nd7 19. Bg5 Bxg5 20. Nxg5 h6 21. Nf3 Nc5 22. Nd2 e5 23. Ra3 Ne6 24. Nb3 Rab8 25. Nc3 f5 26. Nd5 Bxd5 27. cxd5 Nf4 28. Qd2 Qd7 29. Nd4 Nxh3+ 30. gxh3 exd4 31. Qb2 f4 32. Kh2 Rbe8 33. Rg1 Re5 34. f3 Rh5 35. Rg4 Rxh3+ 36. Kxh3 h5 37. Qg2 Rf6 38. Kh2 hxg4 39. Qxg4 Qxb5 40. Qc8+ Kh7 41. Ra2 Qb1 0-1

[Event "NED Open-ch09 Reinbouw"]
[Site "Velp"]
[Date "1978.08.??"]
[Round "8"]
[White "Witkowski, Stefan"]
[Black "Dieks, Roy G"]
[Result "0-1"]
[ECO "A13"]
[WhiteElo "2365"]
[BlackElo "2250"]
[PlyCount "80"]
[EventDate "1978.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. c4 b6 2. Nf3 Bb7 3. e3 Nf6 4. Be2 e6 5. b3 Be7 6. Bb2 0-0 7. 0-0 d6 8. Qc2 e5 9. Nc3 Nbd7 10. d4 Re8 11. dxe5 Nxe5 12. Nxe5 dxe5 13. Rfd1 Qc8 14. Nd5 Nxd5 15. cxd5 Bd6 16. e4 g6 17. Bb5 Rf8 18. Bc6 Bxc6 19. dxc6 Qe6 20. Rac1 a5 21. Qc4 Qxc4 22. Rxc4 Rad8 23. Kf1 f6 24. Ke2 Kf7 25. Rc3 Bc5 26. Rcd3 Rxd3 27. Rxd3 Bd6 28. Bc1 Ke6 29. g4 a4 30. Rh3 axb3 31. axb3 Ra8 32. Kd3 Ra2 33. Be3 b5 34. Rxh7 g5 35. h4 gxh4 36. Rxh4 Ra6 37. Rh8 Rxc6 38. Rb8 b4 39. Bd2 Ra6 40. Bxb4 c5 0-1

[Event "Hilversum AVRO m3"]
[Site "Hilversum"]
[Date "1975.11.28"]
[Round "2"]
[White "Van der Sterren, Paul"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "D17"]
[PlyCount "85"]
[EventDate "1975.11.??"]
[EventType "match"]
[EventRounds "2"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 e6 7. f3 Bb4 8. Bg5 c5 9. e4 cxd4 10. exf5 Qd5 11. Bxf6 dxc3 12. Kf2 Qc5+ 13. Kg3 gxf6 14. Nxc4 h5 15. Qd3 cxb2 16. Nxb2 Qe5+ 17. Kh3 Qxb2 18. Rb1 Qc3 19. Qxc3 Bxc3 20. Rc1 Ba5 21. Rc8+ Bd8 22. Bd3 Kd7 23. Rhc1 Rh6 24. Be4 a6 25. Bxb7 Ra7 26. Rd1+ Ke7 27. Rdxd8 Nd7 28. Re8+ Kd6 29. Be4 Nc5 30. Red8+ Nd7 31. Bc6 h4 32. Bxd7 Rxd7 33. Rxd7+ Kxd7 34. Ra8 Rh5 35. fxe6+ fxe6 36. Ra7+ Kd6 37. Rxa6+ Kd7 38. Rb6 f5 39. Rb4 e5 40. a5 Rh8 41. a6 Ra8 42. Ra4 Kd6 43. Kxh4 1-0

[Event "Hilversum AVRO m3"]
[Site "Hilversum"]
[Date "1975.11.27"]
[Round "1"]
[White "Dieks, Roy G"]
[Black "Van der Sterren, Paul"]
[Result "0-1"]
[ECO "E59"]
[PlyCount "132"]
[EventDate "1975.11.??"]
[EventType "match"]
[EventRounds "2"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 d5 6. Nf3 c5 7. 0-0 Nc6 8. a3 Bxc3 9. bxc3 dxc4 10. Bxc4 Qc7 11. Bd3 e5 12. Nxe5 Nxe5 13. dxe5 Qxe5 14. Qc2 Rd8 15. f3 b6 16. e4 Bb7 17. Bc4 Bc6 18. a4 Rd7 19. Be3 Nd5 20. Bd2 Nf4 21. g3 Ng6 22. Rae1 Bxa4 23. Qa2 Bc6 24. f4 Qd6 25. Bc1 b5 26. e5 Qc7 27. e6 bxc4 28. exd7 Qxd7 29. Qd2 Qf5 30. Re3 h5 31. h4 Kh7 32. Kh2 a5 33. Ba3 Rd8 34. Qf2 Rb8 35. Re2 Rb5 36. Rb2 Rb3 37. Rxb3 cxb3 38. Qxc5 Qc2+ 39. Qf2 Qxc3 40. Rc1 Qf6 41. Bb2 Qd6 42. Qe2 Qd5 43. f5 Nf8 44. Qxh5+ Kg8 45. Qe2 Nd7 46. h5 Nf6 47. h6 Ng4+ 48. Kh3 Nxh6 49. g4 Kh7 50. Kg3 f6 51. Ba3 Bb7 52. Rd1 Qc6 53. Bb2 a4 54. Rd4 Nf7 55. Qh2+ Kg8 56. Qe2 Qh1 57. Rd7 Bd5 58. Rc7 Nd6 59. Rxg7+ Kxg7 60. Qe7+ Kg8 61. Qd8+ Kh7 62. Qxd6 Qg2+ 63. Kh4 Qf2+ 64. Qg3 Qxb2 65. Qc7+ Kh6 66. Qg3 Qc1 0-1

[Event "NED-SWE m"]
[Site "telex"]
[Date "1975.09.06"]
[Round "1.10"]
[White "Ekstroem, Roland"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "A79"]
[PlyCount "81"]
[EventDate "1975.09.06"]
[EventType "team"]
[EventRounds "1"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Sweden"]
[BlackTeam "Netherlands"]
[WhiteTeamCountry "SWE"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. e4 Bg7 8. Be2 0-0 9. 0-0 Re8 10. Nd2 Na6 11. f3 Nc7 12. a4 b6 13. Nc4 Ba6 14. Bg5 h6 15. Be3 Qd7 16. Qd2 Kh7 17. Kh1 Bxc4 18. Bxc4 a6 19. Rfe1 b5 20. Bf1 b4 21. Nd1 Qe7 22. Bf2 Nd7 23. Ne3 Qf6 24. Nc4 Ne5 25. Na5 Rad8 26. Rac1 g5 27. b3 Rd7 28. Bg3 h5 29. Nc4 Ng6 30. Nxd6 Rxd6 31. Rxc5 h4 32. Bxd6 Qxd6 33. Rc6 Qe5 34. Rec1 Bf8 35. Rxc7 Bd6 36. Rxf7+ Kg8 37. f4 Qxe4 38. Rf6 Bxf4 39. Rxf4 Nxf4 40. d6 h3 41. Rd1 1-0

[Event "NED-ch30"]
[Site "Leeuwarden"]
[Date "1975.04.19"]
[Round "11"]
[White "Dieks, Roy G"]
[Black "Bohm, Hans"]
[Result "1/2-1/2"]
[ECO "B05"]
[PlyCount "138"]
[EventDate "1975.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[EventCategory "3"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 e6 6. Ng5 Bf5 7. Bd3 Bxd3 8. Qxd3 Be7 9. Nf3 Nc6 10. 0-0 dxe5 11. dxe5 Nb6 12. Qe4 Qd5 13. Qf4 Qc4 14. Qg3 Qxc2 15. Qxg7 0-0-0 16. Qxf7 Rhf8 17. Qxe6+ Kb8 18. Nc3 Bc5 19. Qg4 Nd4 20. Qe4 Qxe4 21. Nxe4 Nxf3+ 22. gxf3 Be7 23. f4 Nd5 24. Ng5 Nxf4 25. Bxf4 Rxf4 26. Ne6 Rg8+ 27. Kh1 Rf3 28. Rg1 Rg6 29. Rxg6 hxg6 30. Kg2 Rf5 31. Re1 Kc8 32. Kg3 c5 33. f4 Rh5 34. Rd1 b6 35. Rd2 Rh8 36. Kf3 Rh4 37. b3 a6 38. Kg3 Rh8 39. h3 Rh7 40. Kg2 Rh8 41. a4 a5 42. Rd3 Rh5 43. Kf2 Rh7 44. Ke2 Rh8 45. Kd1 Rh7 46. Kc2 Rh8 47. Kc3 Rh4 48. Rg3 Kd7 49. Rxg6 Rxh3+ 50. Kc4 Re3 51. Ng5 Bxg5 52. e6+ Kd6 53. fxg5 Re4+ 54. Kc3 Re3+ 55. Kc2 Rg3 56. Rg8 Kxe6 57. g6 Rg2+ 58. Kc3 Rg3+ 59. Kb2 Rg2+ 60. Ka3 Kf5 61. g7 Kf6 62. Rb8 Rxg7 63. Rxb6+ Ke5 64. Ra6 Kd4 65. Rxa5 c4 66. bxc4 Kxc4 67. Rh5 Rg3+ 68. Kb2 Kb4 69. a5 Rg2+ 1/2-1/2

[Event "NED-ch30"]
[Site "Leeuwarden"]
[Date "1975.04.17"]
[Round "10"]
[White "Hartoch, Robert G"]
[Black "Dieks, Roy G"]
[Result "1/2-1/2"]
[ECO "B20"]
[PlyCount "118"]
[EventDate "1975.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[EventCategory "3"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. g3 d6 3. Bg2 Nc6 4. c3 e5 5. Ne2 Bg4 6. h3 Bxe2 7. Qxe2 g6 8. a3 Bg7 9. b4 Nge7 10. d3 a6 11. 0-0 0-0 12. Nd2 cxb4 13. axb4 d5 14. Rb1 dxe4 15. dxe4 Na7 16. Bb2 Nec6 17. Nc4 f5 18. exf5 gxf5 19. Rbd1 Qe7 20. Nb6 Rad8 21. Nd5 Qf7 22. c4 b5 23. cxb5 Nxb5 24. Qc4 Rc8 25. Qa2 Kh8 26. Qxa6 Ncd4 27. Bxd4 Nxd4 28. Rc1 Rxc1 29. Rxc1 f4 30. Rc7 Qf5 31. g4 Qb1+ 32. Qf1 Qb3 33. Be4 Rd8 34. Qd3 Qxd3 35. Bxd3 Nf3+ 36. Kh1 Rxd5 37. Rc8+ Bf8 38. Rxf8+ Kg7 39. Rg8+ Kf6 40. Be2 Ng5 41. h4 Ne4 42. Kg2 Rd2 43. Kf3 Nc3 44. g5+ Kf5 45. Rf8+ Kg6 46. Rf6+ Kg7 47. Bc4 h5 48. Rf7+ Kg6 49. Rf6+ Kg7 50. Be6 Rd6 51. Rf7+ Kg6 52. Rf6+ Kg7 53. Bf5 Rxf6 54. gxf6+ Kxf6 55. Be4 Kf7 56. Bc6 Ke7 57. Be4 Kd6 58. Bg6 Nd5 59. Ke4 Nxb4 1/2-1/2

[Event "NED-ch30"]
[Site "Leeuwarden"]
[Date "1975.04.16"]
[Round "9"]
[White "Dieks, Roy G"]
[Black "Van Dop, Arend J"]
[Result "1-0"]
[ECO "B84"]
[PlyCount "67"]
[EventDate "1975.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[EventCategory "3"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6 7. 0-0 b5 8. f4 Bb7 9. Bf3 Nbd7 10. Qe2 Be7 11. e5 Bxf3 12. Nxf3 Ng4 13. Ng5 Qb6+ 14. Kh1 h5 15. f5 dxe5 16. fxe6 fxe6 17. Nce4 Ndf6 18. a4 0-0 19. Bd2 Rac8 20. h3 Nxe4 21. Nxe4 Nf6 22. Ng5 bxa4 23. Qxe5 Rxc2 24. Bc3 Qc6 25. Rf3 Ne8 26. Rg3 Rf5 27. Qe3 Bf6 28. Nxe6 Bxc3 29. bxc3 Qc4 30. Nd4 Rf1+ 31. Rxf1 Qxf1+ 32. Kh2 Rc1 33. Qxe8+ Kh7 34. Qg6+ 1-0

[Event "NED-ch30"]
[Site "Leeuwarden"]
[Date "1975.04.15"]
[Round "8"]
[White "Vogel, Jaap"]
[Black "Dieks, Roy G"]
[Result "1/2-1/2"]
[ECO "E65"]
[PlyCount "61"]
[EventDate "1975.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[EventCategory "3"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 g6 3. g3 Bg7 4. Bg2 0-0 5. 0-0 d6 6. c4 c5 7. Nc3 Nc6 8. dxc5 dxc5 9. Be3 Qa5 10. Bd2 Nd7 11. Nd5 Qd8 12. Bc3 e6 13. Bxg7 Kxg7 14. Nc3 Nde5 15. Nxe5 Nxe5 16. Qc2 Qe7 17. Rad1 f6 18. b3 Rb8 19. f4 Nf7 20. e4 Bd7 21. Qe2 a6 22. e5 f5 23. a4 Bc6 24. Nd5 exd5 25. cxd5 Bd7 26. e6 Nd6 27. Qe5+ Kg8 28. exd7 Qxd7 29. Rfe1 b5 30. axb5 axb5 31. Rc1 1/2-1/2

[Event "NED-ch30"]
[Site "Leeuwarden"]
[Date "1975.04.14"]
[Round "7"]
[White "Dieks, Roy G"]
[Black "Enklaar, Bert F"]
[Result "1-0"]
[ECO "B85"]
[PlyCount "76"]
[EventDate "1975.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[EventCategory "3"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 Be7 7. 0-0 0-0 8. f4 a6 9. Be3 Qc7 10. a4 b6 11. Bf3 Bb7 12. Qe2 Nc6 13. Rad1 Nxd4 14. Rxd4 Rac8 15. Rd2 Nd7 16. g4 Qc4 17. Qd1 Qb4 18. Qc1 Rxc3 19. bxc3 Qxa4 20. Rd4 Qa5 21. e5 Bxf3 22. Rxf3 d5 23. c4 f6 24. exf6 Nxf6 25. h3 dxc4 26. Rxc4 Nd5 27. Bf2 Qb5 28. Re4 Qc6 29. Qe1 Nf6 30. Ree3 Bc5 31. Rd3 Nd5 32. Qe4 Rf6 33. f5 Bxf2+ 34. Rxf2 Qc5 35. c4 Nc7 36. Rd8+ Kf7 37. Qb7 Ke7 38. Qc8 Rf7 1-0

[Event "NED-ch30"]
[Site "Leeuwarden"]
[Date "1975.04.12"]
[Round "6"]
[White "Ree, Hans"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "E91"]
[PlyCount "67"]
[EventDate "1975.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[EventCategory "3"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 Bg4 7. Be3 Nfd7 8. Qd2 c5 9. d5 Nb6 10. b3 Re8 11. 0-0 e6 12. h3 Bxf3 13. Bxf3 exd5 14. cxd5 Na6 15. Rac1 Qe7 16. Rfe1 Nc7 17. g3 Nd7 18. Bg2 Qf8 19. f4 Rab8 20. Bf2 b5 21. e5 dxe5 22. d6 Ne6 23. Bc6 Rb6 24. Bxd7 Rxd6 25. Qxd6 Qxd6 26. Bxe8 exf4 27. Nxb5 Qb8 28. Bd7 fxg3 29. Bxc5 a6 30. Bxe6 Qxb5 31. a4 Qd3 32. Rcd1 Qc3 33. Bxf7+ Kxf7 34. Rd7+ 1-0

[Event "NED-ch30"]
[Site "Leeuwarden"]
[Date "1975.04.11"]
[Round "5"]
[White "Dieks, Roy G"]
[Black "Du Chattel, Philippe J"]
[Result "1-0"]
[ECO "A11"]
[PlyCount "212"]
[EventDate "1975.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[EventCategory "3"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. g3 g6 2. Bg2 c6 3. c4 Bg7 4. Nc3 Nh6 5. e4 d6 6. Nge2 f5 7. d4 0-0 8. exf5 Bxf5 9. h3 Bd7 10. 0-0 Nf5 11. c5 d5 12. f4 Na6 13. a3 b6 14. b4 bxc5 15. bxc5 Qa5 16. Qd2 Nxc5 17. dxc5 Nxg3 18. Nxg3 Bxc3 19. Qa2 Qxc5+ 20. Kh2 Bxa1 21. Qxa1 Rab8 22. f5 Rb3 23. Bh6 Rf6 24. Bg5 Rf7 25. fxg6 hxg6 26. Rxf7 Kxf7 27. Qh8 Qc3 28. Qh7+ Qg7 29. Qh4 Rxa3 30. Qb4 Qe5 31. Qxa3 Qxg5 32. Qxa7 Be6 33. Qc7 Qc1 34. Ne2 Qc4 35. Nf4 Qc5 36. Nd3 Qd6+ 37. Ne5+ Kf6 38. Qxd6 exd6 39. Nxc6 g5 40. Kg3 Bf7 41. Nb4 d4 42. Nd3 Be6 43. Be4 Bc4 44. Nf2 Be6 45. Bd3 Bd5 46. Kg4 Be6+ 47. Kh5 Bf5 48. Ng4+ Ke6 49. Bc4+ d5 50. Bb3 Bb1 51. Kxg5 d3 52. Ne3 Ke5 53. Bxd5 d2 54. Bf3 Kd4 55. Nd1 Bc2 56. h4 Bh7 57. Kf6 Bb1 58. h5 Bh7 59. h6 Bb1 60. Bg4 Bc2 61. Kg7 Bb1 62. h7 Bxh7 63. Kxh7 Ke5 64. Kg6 Kf4 65. Be2 Ke5 66. Kg5 Ke4 67. Kg4 Ke5 68. Kf3 Kd4 69. Kf4 Kd5 70. Ke3 Ke5 71. Kxd2 Kd4 72. Nc3 Ke5 73. Ke3 Kf5 74. Kd4 Ke6 75. Nd5 Kf7 76. Ke5 Kg6 77. Kf4 Kh6 78. Kf5 Kg7 79. Kg5 Kf7 80. Bg4 Kg7 81. Be6 Kh7 82. Kf6 Kh8 83. Bf5 Kg8 84. Nc3 Kh8 85. Ne4 Kg8 86. Ng5 Kh8 87. Nf7+ Kg8 88. Bd3 Kf8 89. Nh6 Ke8 90. Ke6 Kf8 91. Nf7 Kg7 92. Be4 Kf8 93. Kf6 Ke8 94. Bf5 Kf8 95. Bh7 Ke8 96. Ne5 Kd8 97. Ke6 Kc7 98. Kd5 Kb6 99. Nc6 Kc7 100. Bf5 Kb6 101. Bg4 Kb5 102. Bd1 Kb6 103. Ba4 Kc7 104. Ne5 Kb6 105. Nc4+ Kc7 106. Bc6 Kd8 1-0

[Event "NED-ch30"]
[Site "Leeuwarden"]
[Date "1975.04.10"]
[Round "4"]
[White "Borm, Frans"]
[Black "Dieks, Roy G"]
[Result "1/2-1/2"]
[ECO "B77"]
[PlyCount "116"]
[EventDate "1975.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[EventCategory "3"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 0-0 8. Qd2 Nc6 9. Bc4 Qc7 10. Bb3 Ne5 11. h4 Nc4 12. Ndb5 Qc6 13. Nxa7 Qa6 14. Bxc4 Qxc4 15. Qd3 Qc7 16. Nab5 Qa5 17. Nd4 Bd7 18. a3 Rfc8 19. Rb1 Nh5 20. g4 Nf6 21. h5 Bc6 22. hxg6 fxg6 23. Kf2 Rf8 24. Kg2 Qe5 25. Nxc6 bxc6 26. Bd4 Qe6 27. Rh3 Rf7 28. Rbh1 Raf8 29. Ne2 d5 30. Nf4 Qc8 31. e5 Ne4 32. Nxg6 hxg6 33. e6 Rf6 34. Bxf6 Rxf6 35. fxe4 Qxe6 36. exd5 cxd5 37. Rf1 Rxf1 38. Kxf1 Bxb2 39. Re3 Qf6+ 40. Rf3 Qc6 41. a4 Kg7 42. Qb3 Bf6 43. Rf2 d4 44. Rf3 g5 45. Rg3 Qh1+ 46. Rg1 Qh2 47. Rg2 Qf4+ 48. Ke2 Qe4+ 49. Kf1 Qf4+ 50. Ke2 Qe4+ 51. Kf2 Qf4+ 52. Ke1 Qe4+ 53. Kf2 Qf4+ 54. Ke1 Qe4+ 55. Re2 Qxg4 56. a5 Qg1+ 57. Kd2 g4 58. Qe6 Qg3 1/2-1/2

[Event "NED-ch30"]
[Site "Leeuwarden"]
[Date "1975.04.09"]
[Round "3"]
[White "Dieks, Roy G"]
[Black "Timman, Jan H"]
[Result "0-1"]
[ECO "B09"]
[PlyCount "80"]
[EventDate "1975.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[EventCategory "3"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Bd3 e5 6. dxe5 dxe5 7. Nf3 exf4 8. Bxf4 0-0 9. Bg5 h6 10. Bh4 g5 11. Bg3 Nc6 12. 0-0 Be6 13. Bb5 Qe7 14. Bxc6 bxc6 15. Qe2 Qb4 16. a3 Qxb2 17. Be5 Qb6+ 18. Bd4 Qa5 19. e5 Nd7 20. Ne4 Rfe8 21. Nf6+ Bxf6 22. exf6 c5 23. Be3 Qc3 24. Qf2 Qxf6 25. Bxc5 Nxc5 26. Qxc5 Qe7 27. Qc3 Bd5 28. Rae1 Qd6 29. Ne5 Rf8 30. Rf5 Rae8 31. Ref1 f6 32. Ng4 Re2 33. R5f2 Rxf2 34. Rxf2 f5 35. Ne3 Be4 36. Qc4+ Kh8 37. g4 Qb6 38. Nxf5 Bxf5 39. gxf5 Rxf5 40. Qc3+ Kh7 0-1

[Event "NED-ch30"]
[Site "Leeuwarden"]
[Date "1975.04.08"]
[Round "2"]
[White "Schouten, Nico"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "A69"]
[PlyCount "49"]
[EventDate "1975.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[EventCategory "3"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 c5 6. d5 e6 7. Nf3 exd5 8. cxd5 0-0 9. Be2 Re8 10. 0-0 Nxe4 11. Nxe4 Rxe4 12. Bd3 Re8 13. f5 Bxf5 14. Bxf5 gxf5 15. Qd3 Qf6 16. Bg5 Qg6 17. Qb5 Na6 18. Rae1 Rec8 19. Be7 f4 20. Nh4 Qc2 21. Rxf4 c4 22. Nf5 Nc7 23. Qd7 Nxd5 24. Rg4 Rc7 25. Bd8 1-0

[Event "NED-ch30"]
[Site "Leeuwarden"]
[Date "1975.04.07"]
[Round "1"]
[White "Van der Sterren, Paul"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "B70"]
[PlyCount "135"]
[EventDate "1975.04.07"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[EventCategory "3"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 Nbd7 7. 0-0 Nc5 8. f3 g6 9. Be3 Bg7 10. Nb3 Nxb3 11. axb3 0-0 12. f4 Bd7 13. e5 Ne8 14. Bf3 Bc6 15. Bxc6 bxc6 16. exd6 exd6 17. Qd3 Qe7 18. Rfe1 d5 19. Rxa6 Rxa6 20. Qxa6 d4 21. Bf2 Qd6 22. Ne4 Qd5 23. Qc4 Nc7 24. Nc5 Qf5 25. Nd3 Ne6 26. Qxc6 Nxf4 27. Nxf4 Qxf4 28. Bg3 Qd2 29. Qc4 h5 30. Rf1 Qe3+ 31. Kh1 Kh7 32. b4 f5 33. Bf4 Qe7 34. b5 g5 35. Bc7 Be5 36. Re1 Qxc7 37. Qxc7+ Bxc7 38. Re7+ Kg6 39. Rxc7 Re8 40. Kg1 Re5 41. b6 Rb5 42. Rc6+ Kf7 43. Kf2 Rxb2 44. Ke2 h4 45. h3 Rb1 46. Kd3 Rb4 47. Rd6 Kg7 48. c3 dxc3 49. Kxc3 Rb1 50. Kc4 Rb2 51. Kc5 Rc2+ 52. Kb5 Rb2+ 53. Kc6 Rc2+ 54. Kd7 Rxg2 55. b7 Rb2 56. Kc7 Rxb7+ 57. Kxb7 g4 58. Kc6 gxh3 59. Kc5 f4 60. Kc4 h2 61. Rd1 Kg6 62. Kd3 Kf5 63. Ke2 Kg4 64. Kf2 f3 65. Ra1 Kf4 66. Rh1 Kg4 67. Rxh2 h3 68. Rh1 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1975.02.01"]
[Round "15"]
[White "Dieks, Roy G"]
[Black "Bohm, Hans"]
[Result "0-1"]
[ECO "B05"]
[PlyCount "122"]
[EventDate "1975.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "7"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 e6 6. Ng5 Bf5 7. Bd3 h6 8. Bxf5 exf5 9. Nf3 Nc6 10. 0-0 dxe5 11. c4 Nb6 12. d5 e4 13. dxc6 Qxd1 14. Rxd1 exf3 15. Re1+ Kd8 16. cxb7 Rb8 17. Rd1+ Ke8 18. b3 Rxb7 19. gxf3 c6 20. Nc3 Bb4 21. Ne2 Nc8 22. Bd2 Bc5 23. Ba5 Bb6 24. Bxb6 axb6 25. Nd4 Ne7 26. Re1 Kd8 27. Rad1 Rd7 28. Kf1 Kc7 29. Nc2 Rhd8 30. Rxd7+ Rxd7 31. a4 Ng6 32. Rb1 Rd2 33. Ne1 Nf4 34. Rc1 Kd6 35. Rc2 Rd1 36. b4 c5 37. bxc5+ Kxc5 38. Ra2 Rb1 39. Ra3 Kxc4 40. a5 bxa5 41. Ra4+ Rb4 42. Rxa5 g6 43. Ra7 f6 44. Ra6 Kd5 45. Rxf6 Rb1 46. Rf8 Ke6 47. Re8+ Kf6 48. Rd8 g5 49. Rd6+ Kg7 50. Rd4 Kg6 51. Rd8 Kh5 52. Rd6 Ra1 53. Rd8 Kh4 54. Rh8 h5 55. Rd8 Kh3 56. Rh8 h4 57. Re8 Kxh2 58. Rh8 Ng2 59. Re8 Rxe1+ 60. Rxe1 Nxe1 61. Kxe1 Kg2 0-1

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1975.01.30"]
[Round "14"]
[White "Ligterink, Gert"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "B89"]
[PlyCount "55"]
[EventDate "1975.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "7"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 d6 6. Be3 Nf6 7. Bc4 a6 8. Qe2 Be7 9. 0-0-0 Qc7 10. Bb3 0-0 11. Rhg1 Na5 12. g4 b5 13. g5 Nd7 14. Bd5 b4 15. Nxe6 fxe6 16. Bxe6+ Kh8 17. Nd5 Qd8 18. g6 Ne5 19. Qh5 Nxg6 20. Rxg6 Qe8 21. Rdg1 Bxe6 22. Bd4 Bf6 23. Nxf6 Rxf6 24. Bxf6 gxf6 25. Qh6 Qf8 26. Rg7 Nb3+ 27. axb3 Bxb3 28. Qxh7# 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1975.01.29"]
[Round "13"]
[White "Dieks, Roy G"]
[Black "Ciocaltea, Victor"]
[Result "0-1"]
[ECO "C73"]
[PlyCount "70"]
[EventDate "1975.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "7"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bxc6+ bxc6 6. d4 f6 7. Be3 Bd7 8. Nc3 Ne7 9. Qe2 Ng6 10. h4 h5 11. dxe5 fxe5 12. Ng5 Be7 13. Qc4 Bxg5 14. Bxg5 Qb8 15. 0-0-0 a5 16. a3 Qb7 17. g3 Nf8 18. f4 Be6 19. Qd3 Nd7 20. Rde1 Rb8 21. Nd1 Nc5 22. Qe3 Na4 23. b3 Nc5 24. fxe5 Bxb3 25. exd6 cxd6 26. e5 Bxc2 27. exd6+ Ne4 28. d7+ Kf7 29. Qf4+ Kg6 30. Rxe4 Qb1+ 31. Kd2 Bxe4 32. Qd6+ Kh7 33. Rf1 Rb3 34. Qe5 Rd3+ 35. Ke2 Qc2+ 0-1

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1975.01.28"]
[Round "12"]
[White "Enklaar, Bert F"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "B92"]
[PlyCount "87"]
[EventDate "1975.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "7"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. 0-0 Qc7 9. a4 b6 10. Be3 Bb7 11. f3 0-0 12. Qd2 Rd8 13. a5 Nbd7 14. Na4 b5 15. Nb6 Rab8 16. Rfd1 d5 17. exd5 Nxd5 18. Nxd5 Bxd5 19. Rac1 Be6 20. Qe1 f5 21. Kh1 Rf8 22. Qf1 f4 23. Bf2 Nf6 24. Bb6 Qc6 25. c4 b4 26. Bd3 Bd8 27. Bf2 Bf7 28. Nc5 Bg6 29. Bxg6 hxg6 30. Qd3 Bxa5 31. Qxg6 Bb6 32. Rd7 Qxd7 33. Nxd7 Nxd7 34. Bxb6 Nxb6 35. c5 Nd5 36. Qxa6 Ne3 37. c6 Ra8 38. Qb5 Rab8 39. Qc5 Kh8 40. c7 Rbc8 41. Qxb4 Nd5 42. Qd6 Nxc7 43. Rxc7 Rfd8 44. Rxc8 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1975.01.27"]
[Round "11"]
[White "Dieks, Roy G"]
[Black "Ek, Hans"]
[Result "1-0"]
[ECO "C07"]
[PlyCount "61"]
[EventDate "1975.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "7"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 a6 4. Bd3 c5 5. Ngf3 Nc6 6. dxc5 Bxc5 7. 0-0 Nf6 8. Qe2 Nb4 9. e5 Ng8 10. Nb3 Nxd3 11. Qxd3 Bb6 12. Nfd4 Ne7 13. Qg3 Ng6 14. f4 0-0 15. Be3 f6 16. exf6 Qxf6 17. c3 Bc7 18. Ne2 Bd7 19. Bd4 Qf5 20. a4 Rf7 21. Nc5 Bc6 22. Nd3 Qh5 23. Qe3 Re8 24. Rf3 Qf5 25. b3 Qe4 26. Qf2 Nh4 27. Re3 Qxg2+ 28. Qxg2 Nxg2 29. Kxg2 g5 30. Rg3 h6 31. h4 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1975.01.25"]
[Round "10"]
[White "Dvoretzky, Mark"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "A08"]
[PlyCount "121"]
[EventDate "1975.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "7"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d3 Nc6 4. g3 d5 5. Nbd2 Bd6 6. Bg2 Nge7 7. 0-0 0-0 8. Nh4 b6 9. f4 Bc7 10. f5 exf5 11. exf5 f6 12. c3 Ba6 13. Ndf3 Qd7 14. g4 Qd6 15. Rf2 Rae8 16. Bh3 h6 17. Ng2 d4 18. c4 Bb7 19. Nf4 Nd8 20. Bg2 Qd7 21. Nh4 Bxf4 22. Bxf4 Nf7 23. Qf1 Rd8 24. Re1 Rfe8 25. Bxb7 Qxb7 26. Rfe2 Qd7 27. Re6 Ng5 28. Bxg5 hxg5 29. Qe2 gxh4 30. Rxe7 Rxe7 31. Qxe7 Kh7 32. Kg2 Qc6+ 33. Re4 Qa4 34. b3 Qd7 35. Kh3 Qc8 36. Qf7 Qc6 37. Kxh4 Qd6 38. Kh3 Rf8 39. Qxa7 Rh8 40. Qf7 Rf8 41. Qe7 Qb8 42. a4 Qa8 43. Kg3 Qb8+ 44. Kg2 Qa8 45. h4 Qa5 46. Re2 Qa8+ 47. Qe4 Qc8 48. Kh3 Kh8 49. Qd5 Qb8 50. Re4 Re8 51. g5 Rxe4 52. Qxe4 Kh7 53. g6+ Kh6 54. Kg4 Qh2 55. Qf4+ Qxf4+ 56. Kxf4 Kh5 57. Kg3 Kh6 58. Kg4 b5 59. cxb5 c4 60. dxc4 d3 61. Kf3 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1975.01.24"]
[Round "9"]
[White "Dieks, Roy G"]
[Black "Portisch, Ferenc"]
[Result "0-1"]
[ECO "E74"]
[PlyCount "56"]
[EventDate "1975.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "7"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. c4 g6 2. Nc3 Bg7 3. d4 Nf6 4. e4 d6 5. Be2 0-0 6. Bg5 c5 7. d5 h6 8. Bd2 e6 9. Qc1 Kh7 10. h4 exd5 11. exd5 Re8 12. h5 Nxh5 13. Be3 f5 14. Bxh5 f4 15. Bf3 fxe3 16. fxe3 Nd7 17. e4 Ne5 18. Be2 h5 19. Qe3 Ng4 20. Bxg4 Bxg4 21. Nge2 Rf8 22. Qg3 Bh6 23. Rf1 Qg5 24. Rd1 Rxf1+ 25. Kxf1 Rf8+ 26. Kg1 h4 27. Qd3 Rf3 28. gxf3 Bh3+ 0-1

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1975.01.23"]
[Round "8"]
[White "Weinstein, Norman"]
[Black "Dieks, Roy G"]
[Result "0-1"]
[ECO "B92"]
[PlyCount "90"]
[EventDate "1975.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "7"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. 0-0 Qc7 9. a4 b6 10. Bg5 Nbd7 11. Nd2 Bb7 12. Bc4 0-0 13. Qe2 h6 14. Bxf6 Nxf6 15. Rfd1 Rfc8 16. Bb3 Bc6 17. Nf1 Qb7 18. Nd5 b5 19. axb5 Bxb5 20. Qf3 Bc6 21. Nfe3 Nxd5 22. Nxd5 Bf8 23. Rd3 a5 24. Qf5 Kh8 25. Nc3 Rc7 26. h3 a4 27. Bxa4 Bd7 28. Qf3 Rxc3 29. Rxc3 Rxa4 30. Rca3 Rxa3 31. Qxa3 Kg8 32. f3 d5 33. Qb3 Qxb3 34. cxb3 dxe4 35. fxe4 Bc6 36. Rc1 Bxe4 37. Rc8 g6 38. b4 Bd3 39. Rb8 Kg7 40. b5 Bc5+ 41. Kh1 e4 42. b4 Bd4 43. b6 e3 44. b7 e2 45. Re8 Ba7 0-1

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1975.01.21"]
[Round "7"]
[White "Dieks, Roy G"]
[Black "Sznapik, Aleksander"]
[Result "1-0"]
[ECO "B06"]
[PlyCount "65"]
[EventDate "1975.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "7"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. f4 a6 5. Nf3 b5 6. Bd3 Bb7 7. 0-0 Nd7 8. e5 c5 9. Ng5 Nh6 10. e6 Bxd4+ 11. Kh1 Nf8 12. f5 fxe6 13. fxg6 Kd7 14. gxh7 Qe8 15. Nxe6 Nxe6 16. Bxh6 b4 17. Na4 Kc7 18. c3 bxc3 19. bxc3 Be5 20. Rb1 Bc6 21. Qg4 Nf8 22. Bg7 Bxa4 23. Bxh8 Bxh8 24. Rxf8 Qxf8 25. Qxa4 Rb8 26. Rf1 Qh6 27. Qa5+ Kd7 28. Qxa6 Be5 29. h3 Kc7 30. Be4 Rb2 31. Qa7+ Kc8 32. Bf5+ e6 33. Bxe6+ 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1975.01.20"]
[Round "6"]
[White "Vadasz, Laszlo"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "A49"]
[PlyCount "73"]
[EventDate "1975.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "7"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 d6 5. d4 c5 6. Bg2 0-0 7. 0-0 cxd4 8. Nxd4 d5 9. c4 dxc4 10. bxc4 Ng4 11. h3 Qb6 12. Bc3 Rd8 13. e3 e5 14. c5 Qa6 15. hxg4 exd4 16. exd4 Qc4 17. Qb3 Qxb3 18. axb3 Bxd4 19. b4 a5 20. Re1 Bxc3 21. Nxc3 Na6 22. Rxa5 Rb8 23. Rb5 Rd3 24. Nd5 Rxd5 25. Bxd5 Nc7 26. Bc4 Be6 27. Rxe6 fxe6 28. Rb6 Kf7 29. c6 Ke7 30. Rxb7 Rc8 31. b5 Kd6 32. b6 Na8 33. c7 Kc6 34. Ba6 Kd7 35. Rb8 Nxb6 36. Rxb6 Rxc7 37. Rb7 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1975.01.19"]
[Round "5"]
[White "Dieks, Roy G"]
[Black "Timman, Ton"]
[Result "1-0"]
[ECO "D19"]
[PlyCount "63"]
[EventDate "1975.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "7"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. c4 Nf6 2. Nf3 c6 3. d4 d5 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. 0-0 0-0 9. Qe2 Nbd7 10. Nh4 Bg4 11. f3 Nd5 12. fxg4 Qxh4 13. Na2 Bd6 14. g3 Qe7 15. e4 N5b6 16. Bd3 e5 17. a5 Nc8 18. d5 Bc5+ 19. Kg2 cxd5 20. exd5 Nd6 21. Nc3 Bd4 22. g5 Nc5 23. Bxh7+ Kxh7 24. Rf4 g6 25. Rxd4 Nb3 26. Rh4+ Kg8 27. Rb1 Nxc1 28. Rxc1 Qxg5 29. Re1 e4 30. Nxe4 Qxd5 31. Rd1 Qc6 32. Rxd6 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1975.01.17"]
[Round "4"]
[White "Schmidt, Wlodzimierz"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "A38"]
[PlyCount "93"]
[EventDate "1975.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "7"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 g6 7. 0-0 Bg7 8. Nxd5 Qxd5 9. d3 0-0 10. Be3 Qd6 11. Rc1 Nd4 12. Nd2 f5 13. Nc4 Qa6 14. a3 Bd7 15. Bxd4 Bxd4 16. b4 cxb4 17. axb4 Rac8 18. Qb3 Qa4 19. Qxa4 Bxa4 20. Bxb7 Rb8 21. Na5 Rf6 22. Rc4 Bb6 23. Rfc1 Bxa5 24. Bd5+ Kg7 25. bxa5 Bb3 26. Rc5 Bxd5 27. Rxd5 Rb7 28. Kg2 Kf7 29. Kf3 Re6 30. h4 Rb2 31. e3 Rb7 32. Rc2 Rf6 33. d4 Ra6 34. Rdc5 Rb4 35. Re5 Rb7 36. Rc8 Rd6 37. Kf4 Rb2 38. f3 Rb7 39. g4 fxg4 40. fxg4 Rf6+ 41. Ke4 Rd7 42. g5 Rf1 43. Rb5 Rh1 44. Ke5 Rd6 45. d5 Rxh4 46. Rbb8 h5 47. Rg8 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1975.01.16"]
[Round "3"]
[White "Dieks, Roy G"]
[Black "Bukic, Enver"]
[Result "1-0"]
[ECO "E73"]
[PlyCount "63"]
[EventDate "1975.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "7"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. c4 g6 2. Nc3 Bg7 3. d4 Nf6 4. e4 d6 5. Be2 0-0 6. Bg5 h6 7. Be3 c5 8. dxc5 Qa5 9. Qd2 dxc5 10. Bxh6 Rd8 11. Qe3 Bxh6 12. Qxh6 Nxe4 13. Rc1 Nxc3 14. Rxc3 Qxa2 15. Qc1 Qa5 16. h4 f6 17. h5 g5 18. Nf3 Kh8 19. 0-0 Rg8 20. Nh4 Nc6 21. Ng6+ Rxg6 22. hxg6 Nd4 23. Bd3 Kg7 24. f4 Qc7 25. fxg5 f5 26. Qe1 Be6 27. Bxf5 Bxf5 28. Rxf5 Nxf5 29. Qe6 Nd6 30. Rh3 Rg8 31. Rh7+ Kf8 32. g7+ 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1975.01.15"]
[Round "2"]
[White "Martz, William E"]
[Black "Dieks, Roy G"]
[Result "1/2-1/2"]
[ECO "A34"]
[PlyCount "77"]
[EventDate "1975.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "7"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 d5 3. Nf3 c5 4. cxd5 Nxd5 5. d4 cxd4 6. Qxd4 Nxc3 7. Qxc3 Nc6 8. e4 e6 9. Bb5 Bd7 10. 0-0 a6 11. Be2 Qa5 12. Qxa5 Nxa5 13. Ne5 Bd6 14. Nxf7 Kxf7 15. Rd1 Bb5 16. Bxb5 axb5 17. Rxd6 Nb3 18. Rb1 Rxa2 19. Be3 Rha8 20. g3 Ra1 21. Rxa1 Rxa1+ 22. Kg2 Ra2 23. Rb6 Rxb2 24. Rxb5 e5 25. Rxb7+ Kf6 26. Rb6+ Kf7 27. Kh3 Rb1 28. Kg4 g6 29. Rb7+ Ke6 30. Rb6+ Kf7 31. Rb4 Kf6 32. h3 h5+ 33. Kh4 Nd4 34. Rxd4 exd4 35. Bxd4+ Kf7 36. f4 Rb4 37. Be5 Rxe4 38. g4 hxg4 39. hxg4 1/2-1/2

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1975.01.14"]
[Round "1"]
[White "Dieks, Roy G"]
[Black "Sigurjonsson, Gudmundur"]
[Result "0-1"]
[ECO "E89"]
[PlyCount "74"]
[EventDate "1975.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "7"]
[SourceTitle "MCL"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. c4 g6 2. e4 Bg7 3. d4 d6 4. Nc3 Nf6 5. f3 0-0 6. Be3 e5 7. Nge2 c6 8. Qd2 Nbd7 9. d5 cxd5 10. cxd5 a6 11. Nc1 Nh5 12. Nd3 f5 13. exf5 gxf5 14. Be2 Ndf6 15. 0-0 Qe8 16. a4 Kh8 17. a5 Rg8 18. Rfe1 Qg6 19. Bf1 Bd7 20. Nf2 Rac8 21. Rac1 Bf8 22. b4 Rc4 23. Nd3 Rh4 24. Bf2 Rh3 25. Qe2 Qh6 26. Nxe5 dxe5 27. Qxe5 Rxf3 28. Be2 Bd6 29. Qxd6 Rxf2 30. Bf1 Nf4 31. Qe5 Rfxg2+ 32. Bxg2 Rxg2+ 33. Kf1 Rxh2 34. Qb8+ Kg7 35. Re7+ Kg6 36. Rxd7 Qh3+ 37. Ke1 Qe3+ 0-1

[Event "EU-ch U21 fin-A"]
[Site "Groningen"]
[Date "1975.01.06"]
[Round "9"]
[White "Dieks, Roy G"]
[Black "Van der Sterren, Paul"]
[Result "0-1"]
[ECO "B33"]
[PlyCount "104"]
[EventDate "1974.12.27"]
[EventType "tourn"]
[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. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 d6 7. Bf4 e5 8. Bg5 a6 9. Bxf6 gxf6 10. Na3 b5 11. Nd5 f5 12. exf5 Bxf5 13. Qf3 Nd4 14. Nc7+ Qxc7 15. Qxa8+ Ke7 16. c3 b4 17. cxb4 Qb6 18. Bxa6 Qxb4+ 19. Kf1 Qd2 20. h3 Bd3+ 21. Bxd3 Qxd3+ 22. Kg1 Bh6 23. Qb7+ Kf6 24. Kh2 Rb8 25. Rhd1 Qxd1 26. Qxb8 Qxa1 27. Qxd6+ Ne6 28. Nc4 Qe1 29. Qb6 Qe2 30. Nd6 Bf4+ 31. g3 Bc1 32. Qa7 Ng5 33. h4 Nf3+ 34. Kg2 Nxh4+ 35. Kh2 Nf3+ 36. Kg2 Ng5 37. Ne8+ Kg6 38. b3 Bb2 39. Qb6+ Ne6 40. Qc6 Bd4 41. Qf3 Qxf3+ 42. Kxf3 f5 43. Nd6 Bc5 44. Nc4 Nd4+ 45. Kg2 Kf6 46. Kh3 Ke6 47. Ne3 Ne2 48. Nd1 Nc1 49. Kg2 Nxa2 50. Kh3 Nc1 51. Kh4 Nxb3 52. Kh5 Nd2 0-1

[Event "EU-ch U21 fin-A"]
[Site "Groningen"]
[Date "1975.01.05"]
[Round "8"]
[White "Gruenfeld, Yehuda"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "B96"]
[PlyCount "43"]
[EventDate "1974.12.27"]
[EventType "tourn"]
[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. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 b5 8. e5 dxe5 9. fxe5 Qc7 10. Qe2 Nfd7 11. 0-0-0 Bb7 12. Qg4 Qxe5 13. Bxb5 h5 14. Bxd7+ Nxd7 15. Qh4 Bb4 16. Rhe1 Qa5 17. Nxe6 Bxc3 18. bxc3 Ne5 19. Nxg7+ Kf8 20. Be7+ Kg8 21. Bb4 Qb5 22. Nf5 1-0

[Event "EU-ch U21 fin-A"]
[Site "Groningen"]
[Date "1975.01.03"]
[Round "7"]
[White "Szekely, Peter"]
[Black "Dieks, Roy G"]
[Result "1/2-1/2"]
[ECO "A34"]
[PlyCount "21"]
[EventDate "1974.12.27"]
[EventType "tourn"]
[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. c4 c5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nc6 6. Nc3 Nc7 7. Qa4 Qd7 8. 0-0 e6 9. Rd1 Nd4 10. Qxd7+ Bxd7 11. Ne5 1/2-1/2

[Event "EU-ch U21 fin-A"]
[Site "Groningen"]
[Date "1975.01.02"]
[Round "6"]
[White "Dieks, Roy G"]
[Black "Bichsel, Walter"]
[Result "0-1"]
[ECO "D53"]
[PlyCount "136"]
[EventDate "1974.12.27"]
[EventType "tourn"]
[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 e6 3. d4 d5 4. Bg5 Be7 5. e3 h6 6. Bh4 Ne4 7. Bxe7 Qxe7 8. cxd5 Nxc3 9. bxc3 exd5 10. Bd3 0-0 11. Qh5 c6 12. Ne2 b6 13. 0-0 Ba6 14. Bxa6 Nxa6 15. Ng3 Nc7 16. Rae1 Rae8 17. f3 Nb5 18. Nf5 Qg5 19. Qxg5 hxg5 20. Rc1 g6 21. Nh6+ Kg7 22. Ng4 Nd6 23. Ne5 Rc8 24. a4 Rfe8 25. Rfe1 c5 26. Kf2 f6 27. Nd3 cxd4 28. cxd4 Nf5 29. Nb4 Rxc1 30. Rxc1 Rxe3 31. Nxd5 Ra3 32. Rc7+ Kf8 33. Rxa7 Ra2+ 34. Kf1 b5 35. a5 Nxd4 36. Nb4 Ra4 37. a6 Rxb4 38. Rc7 Ra4 39. a7 Ra1+ 40. Kf2 Ra2+ 41. Kf1 Ra1+ 42. Kf2 Ra2+ 43. Kg3 Nf5+ 44. Kh3 Ne7 45. Rb7 Kf7 46. g3 b4 47. Kg4 b3 48. h4 gxh4 49. gxh4 b2 50. h5 gxh5+ 51. Kxh5 Rxa7 52. Rxb2 Ra5+ 53. Kg4 Kg6 54. Kg3 Nf5+ 55. Kf2 Ra3 56. Rb4 Ra2+ 57. Kf1 Ne3+ 58. Kg1 f5 59. Rd4 Kg5 60. Rb4 f4 61. Kh1 Kh4 62. Rb1 Rd2 63. Kg1 Rd1+ 64. Rxd1 Nxd1 65. Kg2 Nb2 66. Kh2 Nc4 67. Kg2 Ne5 68. Kf2 Kh3 0-1

[Event "EU-ch U21 fin-A"]
[Site "Groningen"]
[Date "1975.01.01"]
[Round "5"]
[White "Podzielny, Karl Heinz"]
[Black "Dieks, Roy G"]
[Result "0-1"]
[ECO "A03"]
[PlyCount "81"]
[EventDate "1974.12.27"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. f4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 0-0 5. 0-0 d5 6. d3 c5 7. Nc3 d4 8. Na4 Qa5 9. c4 Bd7 10. b3 Bc6 11. Bd2 Qc7 12. b4 cxb4 13. Qb3 Ng4 14. Rab1 a5 15. a3 Na6 16. axb4 Nxb4 17. Rfc1 Ne3 18. Bxe3 dxe3 19. Nc3 Qd7 20. d4 Bxf3 21. Bxf3 Qxd4 22. Bxb7 Rab8 23. Nb5 Qb6 24. Bf3 e5 25. fxe5 Bxe5 26. Qa3 h5 27. Rb3 h4 28. Kg2 hxg3 29. hxg3 Qf6 30. Nc3 Kg7 31. Rbb1 Rh8 32. Ne4 Qf5 33. Rh1 Nc2 34. Rxb8 Rxb8 35. Qe7 Nd4 36. Ng5 Nxf3 37. Nxf3 Bf6 38. Qxe3 Rc8 39. Nd2 Qe5 40. Qxe5 Bxe5 41. Nf3 0-1

[Event "EU-ch U21 fin-A"]
[Site "Groningen"]
[Date "1974.12.30"]
[Round "4"]
[White "Dieks, Roy G"]
[Black "Nunn, John DM"]
[Result "1-0"]
[ECO "A75"]
[PlyCount "75"]
[EventDate "1974.12.27"]
[EventType "tourn"]
[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 e6 3. d4 c5 4. d5 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 0-0 9. 0-0 a6 10. a4 Bg4 11. h3 Bxf3 12. Bxf3 Nbd7 13. Bf4 Qc7 14. Qc2 Rfe8 15. b3 c4 16. b4 Re7 17. Rfe1 Rae8 18. Rab1 h6 19. Bh2 Ne5 20. Be2 Nfd7 21. Rec1 Qb6 22. a5 Qd4 23. Bf4 Nd3 24. Be3 Qxc3 25. Qxc3 Bxc3 26. Rxc3 Rxe4 27. Bxd3 cxd3 28. Rxd3 h5 29. b5 Ra4 30. bxa6 bxa6 31. Rb7 Ne5 32. Rc3 Nc4 33. Bg5 Nxa5 34. Ra7 Rc4 35. Rf3 f5 36. Rxa6 Nb7 37. Rb6 Nd8 38. Rb8 1-0

[Event "EU-ch U21 fin-A"]
[Site "Groningen"]
[Date "1974.12.29"]
[Round "3"]
[White "Schneider, Lars Ake"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "B44"]
[PlyCount "57"]
[EventDate "1974.12.27"]
[EventType "tourn"]
[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. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Be3 Nf6 6. Bd3 d5 7. exd5 Nxd5 8. Nxc6 bxc6 9. Bd2 Rb8 10. 0-0 Rxb2 11. c4 Nf6 12. Qf3 Bd7 13. Rd1 Bc5 14. Nc3 Bb4 15. Rac1 Qe7 16. Bg5 h6 17. Bh4 Bd6 18. Be4 g5 19. Rxd6 gxh4 20. Rcd1 0-0 21. Qe3 Kg7 22. Qxa7 Rfb8 23. Bxc6 Qxd6 24. Rxd6 Rb1+ 25. Rd1 Rxd1+ 26. Nxd1 Rb1 27. Bf3 Bc6 28. Qd4 e5 29. Qd3 1-0

[Event "EU-ch U21 fin-A"]
[Site "Groningen"]
[Date "1974.12.28"]
[Round "2"]
[White "Dieks, Roy G"]
[Black "Meinsohn, Pierre"]
[Result "0-1"]
[ECO "C88"]
[PlyCount "62"]
[EventDate "1974.12.27"]
[EventType "tourn"]
[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 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 0-0 8. h3 Bb7 9. d3 h6 10. c3 Re8 11. Nbd2 Bf8 12. Nf1 Na5 13. Bc2 d5 14. exd5 Qxd5 15. Ne3 Qd7 16. b4 Nc6 17. Bb2 Rad8 18. a3 g6 19. d4 e4 20. Nd2 Ne7 21. Nef1 Ned5 22. Qb1 Nf4 23. Nxe4 Nxe4 24. Bxe4 Bxe4 25. Rxe4 Ne2+ 26. Kh1 Qc6 27. Rxe8 Rxe8 28. Qd1 Qf6 29. f3 Bd6 30. Qd2 Qh4 31. Re1 Qf2 0-1

[Event "EU-ch U21 fin-A"]
[Site "Groningen"]
[Date "1974.12.27"]
[Round "1"]
[White "Borkowski, Franciszek"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "B53"]
[PlyCount "139"]
[EventDate "1974.12.27"]
[EventType "tourn"]
[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. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 e6 9. 0-0-0 Be7 10. Rhe1 0-0 11. Qd2 Qc7 12. Nd4 Rfd8 13. f4 h6 14. Bxf6 Bxf6 15. g4 b5 16. g5 hxg5 17. fxg5 Bxd4 18. Qxd4 Qa5 19. g6 fxg6 20. Rg1 Be8 21. Rg5 Rab8 22. Rf1 Qb6 23. Qd2 Rb7 24. Ne2 b4 25. Nd4 Qa6 26. Qd3 Qxd3 27. cxd3 e5 28. Nb3 Bf7 29. Kd2 Rc7 30. Rc1 Rxc1 31. Kxc1 Kf8 32. Kd2 Ke7 33. Rg2 Ra8 34. Na5 Rc8 35. b3 Rc5 36. Nc4 Bxc4 37. dxc4 Kf6 38. Ke3 g5 39. Rd2 Rc6 40. Kf3 Kg6 41. Kg4 Ra6 42. Rg2 Rc6 43. Rd2 Ra6 44. Rd5 Rxa2 45. Rxd6+ Kh7 46. Kxg5 Ra3 47. Rd3 a5 48. c5 Ra2 49. Kf5 Rc2 50. Rd5 Rc3 51. Kxe5 Rxb3 52. c6 a4 53. Kd6 a3 54. c7 Rc3 55. Ra5 Rd3+ 56. Kc6 Rc3+ 57. Kd7 Rd3+ 58. Ke7 Rc3 59. Kd8 Rd3+ 60. Rd5 Rc3 61. Rh5+ Kg6 62. Ra5 Rd3+ 63. Ke7 Rc3 64. Kd7 Rd3+ 65. Kc6 Rc3+ 66. Kb7 b3 67. Rxa3 b2 68. Ra6+ Kf7 69. Rb6 Rc2 70. c8Q 1-0

[Event "EU-ch U21 prel"]
[Site "Groningen"]
[Date "1974.12.24"]
[Round "6"]
[White "Dieks, Roy G"]
[Black "Van der Sterren, Paul"]
[Result "1/2-1/2"]
[ECO "B83"]
[PlyCount "26"]
[EventDate "1974.12.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 e6 3. Nge2 Nc6 4. d4 cxd4 5. Nxd4 d6 6. Be2 Nf6 7. Be3 Be7 8. 0-0 0-0 9. f4 Bd7 10. Qe1 Nxd4 11. Bxd4 Bc6 12. Qg3 g6 13. Bf3 Nd7 1/2-1/2

[Event "EU-ch U21 prel"]
[Site "Groningen"]
[Date "1974.12.23"]
[Round "5"]
[White "Pye, Robert"]
[Black "Dieks, Roy G"]
[Result "0-1"]
[ECO "B92"]
[PlyCount "94"]
[EventDate "1974.12.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. 0-0 Qc7 9. f4 0-0 10. a4 b6 11. Be3 Bb7 12. Bd3 Nbd7 13. Kh1 Rfe8 14. Qe2 Bf8 15. Rae1 Bc6 16. fxe5 dxe5 17. Bg5 Bb4 18. Ra1 Qb7 19. Nd2 h6 20. Bh4 b5 21. axb5 axb5 22. Rxa8 Rxa8 23. h3 Rb8 24. Ra1 Be7 25. Bf2 Nc5 26. Re1 b4 27. Nd1 Nxd3 28. cxd3 Bb5 29. Nc4 Bxc4 30. dxc4 Rd8 31. b3 Nxe4 32. Qxe4 Qxe4 33. Rxe4 Rxd1+ 34. Re1 Rxe1+ 35. Bxe1 f5 36. Kg1 Kf7 37. Kf1 Ke6 38. Ke2 Bc5 39. Kd3 e4+ 40. Ke2 g5 41. Bd2 f4 42. Bc1 Kf5 43. Bb2 h5 44. Bg7 g4 45. hxg4+ hxg4 46. Bh6 f3+ 47. Kf1 e3 0-1

[Event "EU-ch U21 prel"]
[Site "Groningen"]
[Date "1974.12.22"]
[Round "4"]
[White "Dieks, Roy G"]
[Black "Szekely, Peter"]
[Result "1/2-1/2"]
[ECO "A40"]
[PlyCount "38"]
[EventDate "1974.12.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. c4 g6 2. e4 c5 3. Nf3 Bg7 4. d4 Qa5+ 5. Nc3 Nc6 6. d5 Nd4 7. Bd2 Nxf3+ 8. Qxf3 d6 9. Nb5 Qb6 10. Bc3 Bxc3+ 11. Qxc3 Nf6 12. e5 dxe5 13. Qxe5 0-0 14. 0-0-0 Ng4 15. Qe2 a6 16. Nc3 Qd6 17. Ne4 Qe5 18. h3 f5 19. f3 fxe4 1/2-1/2

[Event "EU-ch U21 prel"]
[Site "Groningen"]
[Date "1974.12.21"]
[Round "3"]
[White "Barlov, Dragan"]
[Black "Dieks, Roy G"]
[Result "0-1"]
[ECO "B85"]
[PlyCount "79"]
[EventDate "1974.12.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be2 Nf6 7. 0-0 Nc6 8. Nb3 Be7 9. a4 b6 10. f4 d6 11. Be3 0-0 12. g4 Na5 13. g5 Nd7 14. Nd2 Bb7 15. Bf3 Rfe8 16. Kh1 Rac8 17. Bg2 Bf8 18. Qh5 g6 19. Qh4 Bg7 20. Rf3 d5 21. Rh3 Nf8 22. e5 Nc4 23. Nxc4 Qxc4 24. Bxb6 Qb4 25. Qf2 Rc4 26. Rf1 d4 27. Bxb7 Qxb6 28. Bg2 Qxb2 29. Rb1 Qa3 30. Ne4 Qa2 31. Rg1 Rxc2 32. Qxd4 Rec8 33. Nd6 R8c7 34. Rf3 Rd2 35. Qe4 Qb2 36. Rff1 Rd4 37. Qa8 Rxa4 38. Rb1 Qd2 39. Ne8 Qxf4 40. Rb8 0-1

[Event "EU-ch U21 prel"]
[Site "Groningen"]
[Date "1974.12.20"]
[Round "2"]
[White "Dieks, Roy G"]
[Black "Oney, Adil Feridun"]
[Result "1-0"]
[ECO "A29"]
[PlyCount "55"]
[EventDate "1974.12.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Nd4 5. Bg2 Nxf3+ 6. Bxf3 Bb4 7. Qb3 Bxc3 8. Qxc3 d6 9. Bg2 0-0 10. 0-0 Bg4 11. Re1 c6 12. h3 Bc8 13. b3 Re8 14. Bb2 a5 15. e3 Bf5 16. e4 Bc8 17. d4 c5 18. dxe5 dxe5 19. Rad1 Qc7 20. f4 Nd7 21. Rd5 f6 22. Red1 h6 23. Qd2 Re7 24. h4 Nf8 25. f5 b6 26. g4 Bb7 27. g5 Bxd5 28. Qxd5+ 1-0

[Event "EU-ch U21 prel"]
[Site "Groningen"]
[Date "1974.12.19"]
[Round "1"]
[White "Gruenfeld, Yehuda"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "B80"]
[PlyCount "89"]
[EventDate "1974.12.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 d6 6. g3 a6 7. Bg2 Bd7 8. 0-0 Nf6 9. Re1 Qc7 10. Nxc6 Bxc6 11. Nd5 Bxd5 12. exd5 e5 13. f4 Be7 14. fxe5 dxe5 15. b3 0-0 16. Bb2 Rfe8 17. Kh1 Bc5 18. c4 h5 19. Bf3 h4 20. gxh4 Qd6 21. Rf1 b5 22. Rc1 Rad8 23. Rc2 bxc4 24. bxc4 Rd7 25. Rg2 Rde7 26. Qd2 Nd7 27. Be4 Rb8 28. Qg5 f6 29. Qh5 Nf8 30. Rf3 Reb7 31. Rfg3 Bf2 32. Rxf2 Rxb2 33. Qg4 R2b7 34. h5 Qb4 35. h6 Qe1+ 36. Kg2 g5 37. Rxf6 Kh8 38. Kh3 Qd2 39. Qf5 Qf4 40. Qxg5 Qxg5 41. Rxg5 Nd7 42. Rf7 Nc5 43. Rxb7 Rxb7 44. Rxe5 Rb4 45. Re8# 1-0

[Event "World U20-ch13 Preliminaries"]
[Site "Manila"]
[Date "1974.08.06"]
[Round "3"]
[White "Sunye Neto, Jaime"]
[Black "Dieks, Roy G"]
[Result "0-1"]
[ECO "E07"]
[WhiteElo "2205"]
[BlackElo "2200"]
[PlyCount "64"]
[EventDate "1974.08.04"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "PHI"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. 0-0 0-0 6. d4 Nbd7 7. Qc2 c6 8. cxd5 exd5 9. Bf4 Re8 10. Nc3 Nf8 11. Rad1 g6 12. h3 Bf5 13. Qc1 Bb4 14. Ne5 Nh5 15. Be3 Ng7 16. Ng4 Bxg4 17. hxg4 Qd7 18. Bf3 f5 19. gxf5 Nxf5 20. Bf4 Ne6 21. Bg4 Qf7 22. Be5 Rad8 23. Rd3 Bd6 24. Bxd6 Rxd6 25. Rfd1 h5 26. Bh3 Rf8 27. Rf3 Qg7 28. Bxf5 gxf5 29. Rfd3 f4 30. Kf1 fxg3 31. Qe3 g2+ 32. Kg1 Nf4 0-1

[Event "World U20-ch13 Final A"]
[Site "Manila"]
[Date "1974.08.??"]
[Round "6"]
[White "Dieks, Roy G"]
[Black "Mack, Peter"]
[Result "1-0"]
[ECO "D85"]
[WhiteElo "2200"]
[BlackElo "2270"]
[PlyCount "53"]
[EventDate "1974.08.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "PHI"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 0-0 8. Be2 c5 9. 0-0 Qa5 10. Qb3 Nc6 11. Be3 Bg4 12. Rad1 Qc7 13. h3 Bxf3 14. Bxf3 Rfd8 15. d5 Na5 16. Qa4 c4 17. Bd4 b6 18. Rfe1 Rab8 19. e5 a6 20. h4 b5 21. Qa3 Bf8 22. h5 Rdc8 23. e6 f6 24. hxg6 hxg6 25. Be4 f5 26. Bxf5 gxf5 27. Qc1 1-0

[Event "World U20-ch13 Preliminaries"]
[Site "Manila"]
[Date "1974.08.??"]
[Round "2"]
[White "Dieks, Roy G"]
[Black "Marjanovic, Slavoljub"]
[Result "0-1"]
[ECO "B44"]
[WhiteElo "2200"]
[BlackElo "2310"]
[PlyCount "64"]
[EventDate "1974.08.04"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "PHI"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nb5 d6 6. c4 a6 7. N5c3 Nf6 8. Be2 Be7 9. 0-0 0-0 10. Be3 Qc7 11. Na3 b6 12. Qe1 Bb7 13. Rd1 Rab8 14. f3 Rfd8 15. Qf2 Ba8 16. Rd2 Nb4 17. Rfd1 d5 18. cxd5 exd5 19. e5 Qxe5 20. Bxb6 Rxb6 21. Qxb6 Nd7 22. Qa5 Rb8 23. Nc2 Bg5 24. Nxb4 Bxd2 25. Bf1 Be3+ 26. Kh1 Bb6 27. Qxa6 Bc7 28. g3 d4 29. Be2 Nf8 30. Qc4 dxc3 31. bxc3 Re8 32. Rd2 Bxf3+ 0-1

[Event "World U20-ch13 Preliminaries"]
[Site "Manila"]
[Date "1974.08.??"]
[Round "7"]
[White "Dieks, Roy G"]
[Black "Schneider, Lars Ake"]
[Result "1/2-1/2"]
[ECO "A39"]
[WhiteElo "2200"]
[BlackElo "2380"]
[PlyCount "32"]
[EventDate "1974.08.04"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "PHI"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. c4 Nf6 2. Nf3 c5 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7 6. 0-0 0-0 7. d4 cxd4 8. Nxd4 Nxd4 9. Qxd4 d6 10. Qd3 Nd7 11. b3 Nc5 12. Qd2 a6 13. Bb2 Rb8 14. Nd5 Bxb2 15. Qxb2 b5 16. cxb5 axb5 1/2-1/2

[Event "World U20-ch13 Final A"]
[Site "Manila"]
[Date "1974.08.??"]
[Round "3"]
[White "Marjanovic, Slavoljub"]
[Black "Dieks, Roy G"]
[Result "1/2-1/2"]
[ECO "B25"]
[WhiteElo "2310"]
[BlackElo "2200"]
[PlyCount "82"]
[EventDate "1974.08.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "PHI"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 d6 3. g3 g6 4. Bg2 Bg7 5. d3 Nc6 6. f4 e6 7. Nf3 Nge7 8. 0-0 Rb8 9. Rb1 b5 10. a3 0-0 11. Bd2 a5 12. a4 bxa4 13. Nxa4 Nd4 14. b3 Bd7 15. Nc3 Nec6 16. Ne1 Nb4 17. h3 Nb5 18. Nxb5 Bxb5 19. g4 f5 20. exf5 exf5 21. g5 Kh8 22. h4 h5 23. gxh6 Bd4+ 24. Kh2 Qxh4+ 25. Bh3 Bc6 26. Nf3 Bxf3 27. Rxf3 Nd5 28. Qf1 Rbe8 29. Re1 Rxe1 30. Bxe1 Qxh6 31. Bxa5 Be3 32. Kg3 Bxf4+ 33. Rxf4 Qg5+ 34. Rg4 Qf6 35. Rh4+ Kg7 36. Bd2 g5 37. Rc4 Kg6 38. Bg2 Nb6 39. Bc3 Qe6 40. Qe1 Qxe1+ 41. Bxe1 Nxc4 1/2-1/2

[Event "World U20-ch13 Final A"]
[Site "Manila"]
[Date "1974.08.??"]
[Round "1"]
[White "Schneider, Lars Ake"]
[Black "Dieks, Roy G"]
[Result "0-1"]
[ECO "B53"]
[WhiteElo "2380"]
[BlackElo "2200"]
[PlyCount "66"]
[EventDate "1974.08.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "PHI"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. c4 Nf6 8. Nc3 g6 9. 0-0 Bg7 10. Qd3 0-0 11. Bg5 h6 12. Bf4 Nd7 13. Rfe1 Nc5 14. Qc2 Kh7 15. Rad1 Bxc3 16. Qxc3 Nxe4 17. Qc1 g5 18. Nd4 Nf6 19. Bxg5 hxg5 20. Qxg5 Kh8 21. Rd3 Rg8 22. Rh3+ Nh7 23. Rxh7+ Kxh7 24. Qh4+ Kg7 25. Nf5+ Kf8 26. Rxe7 Rxg2+ 27. Kf1 Kg8 28. Qf6 Qf8 29. Nh6+ Kh7 30. Nxf7 Qxe7 31. Qxe7 Re8 32. Qh4+ Kg7 33. Nxd6 Rg1+ 0-1

[Event "World U20-ch13 Final A"]
[Site "Manila"]
[Date "1974.08.??"]
[Round "7"]
[White "Winston, Peter J"]
[Black "Dieks, Roy G"]
[Result "0-1"]
[ECO "B96"]
[WhiteElo "2285"]
[BlackElo "2200"]
[PlyCount "56"]
[EventDate "1974.08.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "PHI"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 b5 8. e5 dxe5 9. fxe5 Qc7 10. Qe2 Nfd7 11. 0-0-0 Bb7 12. Qg4 Qxe5 13. Bd3 h6 14. Nxe6 hxg5 15. Rhe1 Rh4 16. Qxh4 gxh4 17. Rxe5 Nxe5 18. Nc7+ Ke7 19. Nxa8 Bxa8 20. Be4 Bxe4 21. Nxe4 Nbd7 22. Nd6 g6 23. Nc8+ Ke6 24. Rd4 g5 25. b4 Nc6 26. Re4+ Kf5 27. Re8 Bxb4 28. c3 Bc5 0-1

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1974.04.13"]
[Round "9"]
[White "Wakker, Peter"]
[Black "Dieks, Roy G"]
[Result "0-1"]
[ECO "B52"]
[PlyCount "50"]
[EventDate "1974.04.05"]
[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. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4 e5 6. d3 Ne7 7. Nc3 g6 8. Bg5 Bg7 9. Bxe7 Qxe7 10. Qa4+ Nc6 11. Nd5 Qd8 12. g4 0-0 13. 0-0-0 f5 14. gxf5 gxf5 15. Nd2 Nd4 16. exf5 a6 17. Rde1 Bh6 18. f4 exf4 19. Re7 f3 20. Kb1 Nxf5 21. Rg1+ Kh8 22. Rd7 Qe8 23. Ne4 b5 24. Nef6 Qxd7 25. Qa3 Qe6 0-1

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1974.04.12"]
[Round "8"]
[White "Dieks, Roy G"]
[Black "Nijmeijer, Henk"]
[Result "1/2-1/2"]
[ECO "A15"]
[PlyCount "14"]
[EventDate "1974.04.05"]
[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. Nf3 Ng8 3. Ng1 Nc6 4. Nc3 Nb8 5. Nb1 Nf6 6. Nf3 Ng8 7. Ng1 Nf6 1/2-1/2

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1974.04.11"]
[Round "7"]
[White "Egmond, Peter"]
[Black "Dieks, Roy G"]
[Result "0-1"]
[ECO "D35"]
[PlyCount "58"]
[EventDate "1974.04.05"]
[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. Nc3 d5 4. cxd5 exd5 5. d4 Be7 6. Bf4 c6 7. e3 Nbd7 8. Bd3 Nf8 9. Qc2 Ng6 10. Bg3 0-0 11. 0-0 Re8 12. Rab1 Nh5 13. b4 Nxg3 14. hxg3 Bd6 15. b5 Bg4 16. bxc6 bxc6 17. Rb7 Qf6 18. Nh2 Bc8 19. Rb2 h5 20. Ne2 Ne7 21. Rc1 Ba3 22. Rb3 Bxc1 23. Qxc1 Bf5 24. Ba6 Rab8 25. Nc3 Rxb3 26. axb3 c5 27. Bb5 Rc8 28. Qd2 cxd4 29. exd4 Qb6 0-1

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1974.04.10"]
[Round "6"]
[White "Dieks, Roy G"]
[Black "Van der Sterren, Paul"]
[Result "1-0"]
[ECO "A35"]
[PlyCount "65"]
[EventDate "1974.04.05"]
[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 c5 2. Nf3 Nc6 3. e3 g6 4. d4 Bg7 5. Be2 d6 6. d5 Ne5 7. Nxe5 Bxe5 8. 0-0 Bg7 9. Nc3 Nf6 10. e4 0-0 11. Bf4 Nd7 12. Qd2 a6 13. a4 Re8 14. h3 Qa5 15. Bh2 Qb4 16. Qc2 Rb8 17. Ra3 Bd4 18. Kh1 Ne5 19. Rb3 Qa5 20. f4 Nd7 21. Bd3 Qc7 22. e5 dxe5 23. Ne2 f5 24. Bxf5 gxf5 25. Qxf5 Nf6 26. Qg5+ Kh8 27. fxe5 Ne4 28. Qh4 Nd2 29. Rf7 Bf5 30. Nxd4 cxd4 31. e6 Qxc4 32. Be5+ Kg8 33. Rg3+ 1-0

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1974.04.09"]
[Round "5"]
[White "Van der Hauw, Henk"]
[Black "Dieks, Roy G"]
[Result "1/2-1/2"]
[ECO "B42"]
[PlyCount "60"]
[EventDate "1974.04.05"]
[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. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Be3 Nf6 6. Bd3 d6 7. Nd2 Be7 8. 0-0 e5 9. N4f3 Ng4 10. Nc4 b5 11. Bb6 Qd7 12. Ne3 Nxe3 13. Bxe3 0-0 14. a4 b4 15. Bc4 Bb7 16. Bd5 h6 17. c4 bxc3 18. bxc3 Qc7 19. c4 Nd7 20. Nd2 Rab8 21. a5 Bc6 22. Qg4 Kh8 23. Qh3 Bxd5 24. cxd5 Rfc8 25. Bxh6 gxh6 26. Qxh6+ Kg8 27. Ra3 Nf8 28. Rg3+ Ng6 29. Rxg6+ fxg6 30. Qxg6+ Kh8 1/2-1/2

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1974.04.08"]
[Round "4"]
[White "Dieks, Roy G"]
[Black "De Jong, Tom"]
[Result "1-0"]
[ECO "A29"]
[PlyCount "75"]
[EventDate "1974.04.05"]
[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 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 0-0 6. 0-0 Re8 7. Nd5 e4 8. Ne1 Nxd5 9. cxd5 Nb8 10. d3 Bxe1 11. Rxe1 exd3 12. Qxd3 d6 13. Bd2 Nd7 14. b4 Ne5 15. Qd4 Qf6 16. Bc3 Ng4 17. Qxf6 Nxf6 18. Bxf6 gxf6 19. Rac1 Re7 20. Rc4 Bf5 21. e3 a5 22. Rf4 Bd3 23. Rd1 Bb5 24. Rdd4 b6 25. Rxf6 Bd7 26. bxa5 Rxa5 27. Rd2 Re8 28. Rc2 Rc5 29. Rxc5 bxc5 30. Bf1 Rb8 31. Kg2 Rb2 32. Bc4 Rc2 33. Rf4 c6 34. Bb3 Rc3 35. Ba4 Kf8 36. dxc6 Be6 37. c7 Ra3 38. Re4 1-0

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1974.04.07"]
[Round "3"]
[White "Van der Wees, Aad Jan"]
[Black "Dieks, Roy G"]
[Result "0-1"]
[ECO "B06"]
[PlyCount "54"]
[EventDate "1974.04.05"]
[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 g6 2. e4 Bg7 3. c3 d6 4. f4 Nf6 5. e5 Nd5 6. Nf3 0-0 7. Bc4 Nb6 8. Bd3 Na6 9. 0-0 c5 10. Bxa6 bxa6 11. dxc5 dxc5 12. Qxd8 Rxd8 13. Be3 c4 14. Na3 Bf5 15. Rfd1 Bd3 16. Bc5 Nd5 17. g3 Be2 18. Nd2 Bxd1 19. Rxd1 Nb6 20. Bxe7 Rd3 21. Kf2 Bf8 22. Bxf8 Kxf8 23. Ke2 Rad8 24. Nc2 Na4 25. Nd4 Nxb2 26. Rc1 Na4 27. Ne4 Nxc3+ 0-1

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1974.04.06"]
[Round "2"]
[White "Dieks, Roy G"]
[Black "Scheeren, Peter MJ"]
[Result "1-0"]
[ECO "E92"]
[PlyCount "99"]
[EventDate "1974.04.05"]
[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 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 e5 7. d5 a5 8. 0-0 Na6 9. Bg5 h6 10. Bh4 Qe8 11. Nd2 Bd7 12. b3 Nh7 13. a3 h5 14. h3 Bh6 15. Rb1 Bg5 16. Bg3 h4 17. Bh2 f5 18. b4 axb4 19. axb4 b6 20. Bd3 Qe7 21. Qe2 Bc8 22. Nf3 fxe4 23. Nxe4 Bf4 24. Ra1 Bb7 25. Rfb1 Nb8 26. Rxa8 Bxa8 27. Ra1 Nd7 28. Ra7 Qd8 29. Nc3 Ng5 30. Nxg5 Bxh2+ 31. Kxh2 Qxg5 32. Ne4 Qf4+ 33. g3 Qf5 34. Rxc7 b5 35. Kg2 bxc4 36. Bxc4 Nb6 37. Nxd6 Qf6 38. Ne4 Qd8 39. d6+ Kh8 40. Qe3 g5 41. Qe2 Qe8 42. f3 Qg6 43. Bb3 g4 44. hxg4 Bxe4 45. Qxe4 Qxe4 46. fxe4 h3+ 47. Kxh3 Rd8 48. Rc6 Nd7 49. Be6 Nb8 50. Rc8 1-0

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1974.04.05"]
[Round "1"]
[White "Kemperman, Hans"]
[Black "Dieks, Roy G"]
[Result "0-1"]
[ECO "B51"]
[PlyCount "100"]
[EventDate "1974.04.05"]
[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. Nf3 d6 3. Bb5+ Nd7 4. d4 Ngf6 5. Nc3 a6 6. Bxd7+ Nxd7 7. a4 e6 8. 0-0 Be7 9. Qe2 0-0 10. Be3 b6 11. Rad1 Rb8 12. Rd2 Qc7 13. Kh1 cxd4 14. Bxd4 Bb7 15. Ne1 Ne5 16. Nd1 Qc6 17. f3 Qxa4 18. Bxb6 Bc6 19. Bg1 Bb5 20. Nd3 Qa2 21. Qe1 Qb1 22. Ne3 Qxe1 23. Rxe1 Bxd3 24. cxd3 Rb3 25. Nc4 Bg5 26. Rc2 Nxd3 27. Rd1 Rc8 28. Na5 Rxc2 29. Nxb3 Nf2+ 30. Bxf2 Rxf2 31. Na5 Rxb2 32. Nc4 Rc2 33. Nxd6 Rd2 34. Rxd2 Bxd2 35. Kg1 a5 36. Nc4 Bc3 37. Kf1 Kf8 38. Ke2 f6 39. Kd3 Bb4 40. g4 Ke7 41. f4 Kd7 42. Nb2 Bd6 43. Kc4 Bxf4 44. h3 Kc6 45. Nd3 Bd6 46. Nb2 Be5 47. Nd3 g5 48. Nc5 Bc7 49. Nxe6 Bb6 50. Ng7 Kd6 0-1

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1974.02.02"]
[Round "15"]
[White "Antunac, Goran"]
[Black "Dieks, Roy G"]
[Result "1/2-1/2"]
[ECO "B96"]
[PlyCount "156"]
[EventDate "1974.01.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 b5 8. e5 dxe5 9. fxe5 Qc7 10. exf6 Qe5+ 11. Be2 Qxg5 12. Qd3 Ra7 13. Ne4 Qe5 14. Nf3 Qxb2 15. 0-0 Rd7 16. Qe3 Bb7 17. a4 h6 18. Bd3 Bxe4 19. Qxe4 b4 20. Kh1 Bd6 21. c3 gxf6 22. Rac1 b3 23. Rb1 Qxc3 24. Rfc1 Qa5 25. Rxb3 Rd8 26. Qg4 f5 27. Qg7 Rf8 28. Qxh6 Qxa4 29. Rcb1 Nd7 30. Bxf5 Qf4 31. Qxf4 Bxf4 32. Be4 Nc5 33. Bc6+ Ke7 34. Rc3 Bd6 35. g3 Rc8 36. Nd4 f5 37. Re1 Kf6 38. Bd7 Be5 39. Rxc5 Rxc5 40. Nxe6 Rfc8 41. Bxc8 Rxc8 42. Nf4 Bxf4 43. gxf4 a5 44. Ra1 Ra8 45. Ra4 Ke6 46. Kg2 Kd5 47. Kg3 Kc5 48. Kh4 Kb5 49. Rd4 Kc5 50. Ra4 Kb5 51. Rd4 a4 52. Kg5 a3 53. Rd1 Rh8 54. h4 Rg8+ 55. Kxf5 Rf8+ 56. Kg4 Rg8+ 57. Kf3 Rh8 58. Rh1 Kb4 59. f5 a2 60. Kg4 Rg8+ 61. Kf4 Rh8 62. Kg5 Rg8+ 63. Kh6 Kb3 64. f6 Rh8+ 65. Kg5 Rg8+ 66. Kh5 Rg2 67. Rf1 Rf2 68. Rxf2 a1Q 69. Rf3+ Kc4 70. f7 Qe5+ 71. Kh6 Qe6+ 72. Kg5 Qe5+ 73. Rf5 Qg7+ 74. Kh5 Qh7+ 75. Kg4 Qg7+ 76. Kh3 Qc3+ 77. Kg2 Qc2+ 78. Rf2 Qg6+ 1/2-1/2

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1974.01.31"]
[Round "14"]
[White "Dieks, Roy G"]
[Black "Van Scheltinga, Theo D"]
[Result "1-0"]
[ECO "C68"]
[PlyCount "53"]
[EventDate "1974.01.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 Ne7 6. Nxe5 Qd4 7. Qh5 g6 8. Qg5 Bg7 9. Nd3 f5 10. e5 c5 11. b3 Qxa1 12. Nc3 b6 13. Bb2 Qxf1+ 14. Kxf1 h6 15. Qg3 Bb7 16. e6 0-0-0 17. Nb5 axb5 18. Bxg7 Rh7 19. Be5 g5 20. Bxc7 f4 21. Nxf4 Rd4 22. Ne2 Nf5 23. Qe5 Rd5 24. Qf6 Kxc7 25. Nc3 Ne7 26. Nxd5+ Nxd5 27. Qf7+ 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1974.01.30"]
[Round "13"]
[White "Popov, Luben"]
[Black "Dieks, Roy G"]
[Result "1/2-1/2"]
[ECO "E10"]
[PlyCount "45"]
[EventDate "1974.01.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. Bg5 h6 6. Bxf6 Qxf6 7. Nc3 b4 8. Nb5 Na6 9. Qc2 g5 10. dxe6 dxe6 11. Rd1 Bg7 12. Qe4 Rb8 13. Qc6+ Kf8 14. Nd6 Qd8 15. Rd2 Bc3 16. Nxc8 Bxd2+ 17. Nxd2 Qxc8 18. Qa4 Kg7 19. e3 Rd8 20. Be2 Qd7 21. Qc2 e5 22. b3 f5 23. g4 1/2-1/2

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1974.01.29"]
[Round "12"]
[White "Dieks, Roy G"]
[Black "Baljon, Christofoor"]
[Result "0-1"]
[ECO "E99"]
[PlyCount "82"]
[EventDate "1974.01.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 0-0 5. Nf3 d6 6. Be2 e5 7. 0-0 Nc6 8. d5 Ne7 9. Ne1 Nd7 10. Nd3 f5 11. f3 c5 12. Be3 f4 13. Bf2 g5 14. b4 b6 15. a4 Nf6 16. a5 Rb8 17. Rb1 Ba6 18. Nb5 Qd7 19. Kh1 g4 20. axb6 axb6 21. bxc5 bxc5 22. Nxd6 Rxb1 23. Qxb1 Qxd6 24. Bxc5 Qd8 25. Rc1 g3 26. h3 Ne8 27. Qb4 Rf7 28. Ra1 Bc8 29. Ra8 Bf6 30. Qb8 Kg7 31. Bxe7 Rxe7 32. Qxc8 Qxc8 33. Rxc8 Rb7 34. Kg1 Rb1+ 35. Bf1 Nd6 36. Rc6 Bd8 37. Nb4 Nxc4 38. Nd3 Nd2 39. Rc1 Bb6+ 40. Kh1 Rxc1 41. Nxc1 Nxf1 0-1

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1974.01.28"]
[Round "11"]
[White "Kurajica, Bojan"]
[Black "Dieks, Roy G"]
[Result "1-0"]
[ECO "C73"]
[PlyCount "73"]
[EventDate "1974.01.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bxc6+ bxc6 6. d4 exd4 7. Qxd4 c5 8. Qd3 Be7 9. Nc3 Nf6 10. Bf4 0-0 11. 0-0-0 Bb7 12. h3 Nd7 13. Rhe1 Bf6 14. Bg3 Re8 15. Nd5 Bxd5 16. Qxd5 Ne5 17. Nxe5 Bxe5 18. Bxe5 Rxe5 19. Qxe5 dxe5 20. Rxd8+ Rxd8 21. Rd1 Rxd1+ 22. Kxd1 Kf8 23. Kd2 Ke7 24. Kc3 Kd6 25. Kc4 Kc6 26. c3 Kd6 27. a3 Kc6 28. a4 Kd6 29. a5 c6 30. h4 h5 31. f3 f6 32. g4 hxg4 33. fxg4 g6 34. h5 gxh5 35. gxh5 Ke6 36. Kxc5 Kf7 37. Kd6 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1974.01.26"]
[Round "10"]
[White "Dieks, Roy G"]
[Black "Hartoch, Robert G"]
[Result "1/2-1/2"]
[ECO "E74"]
[PlyCount "61"]
[EventDate "1974.01.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. c4 g6 2. e4 Bg7 3. d4 c5 4. Nf3 d6 5. d5 Nf6 6. Nc3 0-0 7. Bf4 a6 8. a4 Qa5 9. Bd2 e6 10. Be2 Qc7 11. 0-0 exd5 12. cxd5 Re8 13. Qc2 Bg4 14. a5 Nbd7 15. Rfe1 Re7 16. h3 Bxf3 17. Bxf3 Rae8 18. Ra4 h6 19. g3 Nf8 20. Bg2 N6d7 21. Rc1 Qb8 22. Nd1 Nh7 23. Ne3 Nhf6 24. Nc4 Nxe4 25. Bxe4 Rxe4 26. Nxd6 Rxa4 27. Nxe8 Bd4 28. Bf4 Bxf2+ 29. Kxf2 Rxf4+ 30. gxf4 Qxf4+ 31. Kg1 1/2-1/2

