[Event "Imperia op 31st"]
[Site "Imperia"]
[Date "1989.??.??"]
[Round "3"]
[White "Cortlever, Nicolaas"]
[Black "Farachi, Francesco"]
[Result "1-0"]
[ECO "B21"]
[WhiteElo "2390"]
[PlyCount "57"]
[EventDate "1989.09.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ITA"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. e4 c5 2. d3 Nc6 3. f4 e6 4. Nf3 d6 5. Be2 Nf6 6. 0-0 Be7 7. c4 Qc7 8. Nc3 a6 9. Kh1 b6 10. Be3 Bb7 11. d4 cxd4 12. Nxd4 Na5 13. Qa4+ Qd7 14. e5 dxe5 15. fxe5 Qxa4 16. Nxa4 Nd7 17. Nb3 Nxb3 18. axb3 Bd8 19. Rad1 Bc7 20. Rxf7 Bc6 21. Bf3 Kxf7 22. Bxc6 Rad8 23. Bxd7 Rb8 24. c5 bxc5 25. Nxc5 Bxe5 26. Bxe6+ Kg6 27. Nd7 Rbe8 28. Nxe5+ Kf6 29. Bd7 1-0

[Event "Imperia op 30th"]
[Site "Imperia"]
[Date "1988.09.11"]
[Round "8.10"]
[White "Cortlever, Nicolaas"]
[Black "Bilgeri, Richard"]
[Result "1/2-1/2"]
[ECO "A43"]
[WhiteElo "2395"]
[PlyCount "40"]
[EventDate "1988.09.04"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "ITA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. Nc3 c5 3. d5 d6 4. g3 g6 5. Bg2 Bg7 6. a4 0-0 7. Bf4 Nbd7 8. e4 Rb8 9. Nge2 b6 10. 0-0 a6 11. Qd2 Re8 12. h3 Qc7 13. Kh2 b5 14. axb5 axb5 15. Nd1 b4 16. Ne3 Nh5 17. Nc4 Nxf4 18. Nxf4 Ne5 19. Nxe5 Bxe5 20. Nd3 Bg7 1/2-1/2

[Event "Imperia op 30th"]
[Site "Imperia"]
[Date "1988.09.10"]
[Round "7.13"]
[White "Castelfranchi, Carlo"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "C63"]
[WhiteElo "2013"]
[BlackElo "2395"]
[PlyCount "38"]
[EventDate "1988.09.04"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "ITA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. d4 fxe4 5. Bxc6 dxc6 6. Nxe5 Nf6 7. Bg5 c5 8. c3 cxd4 9. cxd4 Bb4+ 10. Nc3 Bxc3+ 11. bxc3 Be6 12. Qa4+ c6 13. Qb4 Qe7 14. Rb1 Qxb4 15. Rxb4 0-0-0 16. 0-0 h6 17. Bh4 g5 18. Bg3 Nd5 19. Rb3 Nf4 1/2-1/2

[Event "Imperia op 30th"]
[Site "Imperia"]
[Date "1988.09.09"]
[Round "6.14"]
[White "Bianco, Valerio"]
[Black "Cortlever, Nicolaas"]
[Result "0-1"]
[ECO "C81"]
[WhiteElo "2285"]
[BlackElo "2395"]
[PlyCount "97"]
[EventDate "1988.09.04"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "ITA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Qe2 Be7 10. Rd1 Nc5 11. c4 Nxb3 12. axb3 Nb4 13. cxb5 axb5 14. Rxa8 Qxa8 15. Ng5 0-0 16. Nxe6 fxe6 17. Qxb5 c6 18. Qe2 Qa2 19. Nd2 Bc5 20. Nf3 Qxb3 21. Rf1 Qd3 22. Re1 h6 23. h3 Ra8 24. Be3 Bxe3 25. Qxe3 Qxe3 26. Rxe3 c5 27. Rc3 Ra1+ 28. Kh2 c4 29. Nd4 Kf7 30. Rf3+ Ke7 31. Rg3 g5 32. f4 Rd1 33. fxg5 hxg5 34. Nf3 Nd3 35. Rxg5 Kf7 36. Rh5 Nxb2 37. Rh7+ Kg8 38. Rc7 d4 39. Ng5 d3 40. Ne4 Kf8 41. Rd7 Re1 42. Nf6 Rf1 43. g4 c3 44. g5 d2 45. g6 Rxf6 46. exf6 d1Q 47. Rf7+ Ke8 48. Re7+ Kd8 49. g7 0-1

[Event "Imperia op 30th"]
[Site "Imperia"]
[Date "1988.09.08"]
[Round "5.19"]
[White "Cortlever, Nicolaas"]
[Black "Fico, Massimiliano"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "2395"]
[BlackElo "2083"]
[PlyCount "16"]
[EventDate "1988.09.04"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "ITA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qf6 5. Nf3 Bb4+ 6. c3 Bc5 7. Bd3 Ne5 8. Nxe5 Qxf2# 0-1

[Event "Imperia op 30th"]
[Site "Imperia"]
[Date "1988.09.07"]
[Round "4.3"]
[White "Mrdja, Milan"]
[Black "Cortlever, Nicolaas"]
[Result "1-0"]
[ECO "B19"]
[WhiteElo "2370"]
[BlackElo "2395"]
[PlyCount "87"]
[EventDate "1988.09.04"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "ITA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nf3 Nd7 7. h4 h6 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 e6 11. Bf4 Qa5+ 12. Bd2 Qc7 13. 0-0-0 Ngf6 14. Qe2 0-0-0 15. Kb1 Bd6 16. Ne4 Nxe4 17. Qxe4 c5 18. c4 Nf6 19. Qe2 Qc6 20. Ne5 Bxe5 21. dxe5 Qe4+ 22. Qxe4 Nxe4 23. Be3 b6 24. Kc2 f5 25. Rxd8+ Rxd8 26. Rh3 Rd7 27. f3 Ng5 28. Bxg5 hxg5 29. Rg3 Rd4 30. Rxg5 Rxc4+ 31. Kb3 Rh4 32. g3 Rh3 33. f4 a6 34. a4 Kd8 35. Kc4 Ke8 36. Rxg7 Rxh5 37. a5 bxa5 38. Kxc5 Rh2 39. Kd6 Rxb2 40. Kxe6 Rb6+ 41. Kxf5 a4 42. Rc7 Rb5 43. Kf6 a3 44. e6 1-0

[Event "Imperia op 30th"]
[Site "Imperia"]
[Date "1988.09.06"]
[Round "3.8"]
[White "Cortlever, Nicolaas"]
[Black "Zuccheri, Andrea"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "2395"]
[PlyCount "65"]
[EventDate "1988.09.04"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "ITA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. Qxd4 e6 6. Bc4 Nc6 7. Qe4 f5 8. exf6 Nxf6 9. Qe2 d5 10. Bb3 Bd6 11. Bg5 0-0 12. Nf3 Qc7 13. Nbd2 Bd7 14. 0-0-0 a5 15. Bc2 b5 16. Kb1 b4 17. c4 a4 18. Bxf6 Rxf6 19. cxd5 exd5 20. Qd3 g6 21. Qxd5+ Be6 22. Ne4 Bxd5 23. Nxf6+ Kg7 24. Nxd5 Qa7 25. Be4 Ne5 26. Nxb4 Nxf3 27. Bxa8 Qxa8 28. Rxd6 Qe4+ 29. Ka1 Nxh2 30. Rd7+ Kf6 31. Nd5+ Kg5 32. f4+ Kf5 33. Rf7+ 1-0

[Event "Imperia op 30th"]
[Site "Imperia"]
[Date "1988.09.05"]
[Round "2.17"]
[White "Cortlever, Nicolaas"]
[Black "Moritz, Christian"]
[Result "1-0"]
[ECO "A17"]
[WhiteElo "2395"]
[PlyCount "65"]
[EventDate "1988.09.04"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "ITA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. g3 Bf5 4. Bg2 e6 5. c4 c6 6. Nc3 Nbd7 7. cxd5 exd5 8. a3 Ne4 9. 0-0 Nxc3 10. bxc3 Be4 11. a4 Be7 12. Nd2 Bxg2 13. Kxg2 0-0 14. Rb1 Rb8 15. e4 Re8 16. c4 dxc4 17. Nxc4 b5 18. Ne3 Nf6 19. f3 Qb6 20. Nf5 Bf8 21. Bf4 Rbd8 22. Bg5 Re6 23. axb5 cxb5 24. d5 Ree8 25. Bxf6 gxf6 26. Qb3 a6 27. Rfd1 Bd6 28. Rbc1 Qb8 29. Rc6 a5 30. Qe3 Re5 31. Rb6 Qc7 32. Rc1 Qd7 33. Rxd6 1-0

[Event "Imperia op 30th"]
[Site "Imperia"]
[Date "1988.09.04"]
[Round "1.17"]
[White "Karl, Hans"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "D94"]
[WhiteElo "2310"]
[BlackElo "2390"]
[PlyCount "33"]
[EventDate "1988.09.04"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "ITA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 g6 6. Nf3 Bg7 7. cxd5 Nxd5 8. Bc4 Nb6 9. Bb3 0-0 10. 0-0 Bg4 11. d5 N8d7 12. h3 Bxf3 13. Qxf3 Nc5 14. Bc2 Rc8 15. Rd1 Qd7 16. Bg5 Nc4 17. d6 1/2-1/2

[Event "Imperia op 29th"]
[Site "Imperia"]
[Date "1987.09.13"]
[Round "8.9"]
[White "Cecconi, Giovanni Alberto"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "A12"]
[WhiteElo "2105"]
[BlackElo "2375"]
[PlyCount "68"]
[EventDate "1987.09.06"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "ITA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. c4 c6 2. b3 d5 3. Bb2 Nf6 4. e3 g6 5. Nf3 Bg7 6. Be2 Bg4 7. 0-0 0-0 8. h3 Bxf3 9. Bxf3 Re8 10. d4 e6 11. Nc3 Nbd7 12. Rc1 dxc4 13. bxc4 e5 14. Qc2 Qe7 15. Rfd1 Rad8 16. Qb3 e4 17. Be2 b6 18. Qa4 Nb8 19. Rc2 a6 20. Qb3 b5 21. cxb5 axb5 22. a4 b4 23. Na2 Nd5 24. Bc4 Bf8 25. Bc1 Nd7 26. Bxd5 cxd5 27. Bd2 Rb8 28. Rc7 Qd8 29. Rc2 Qa5 30. Rb2 Nb6 31. Bxb4 Qxa4 32. Bxf8 Rxf8 33. Qxa4 Nxa4 34. Rb4 Ra8 1/2-1/2

[Event "Imperia op 29th"]
[Site "Imperia"]
[Date "1987.09.12"]
[Round "7.6"]
[White "Cortlever, Nicolaas"]
[Black "Barlocco, Carlo"]
[Result "1/2-1/2"]
[ECO "B70"]
[WhiteElo "2375"]
[BlackElo "2270"]
[PlyCount "112"]
[EventDate "1987.09.06"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "ITA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g3 g6 7. Bg2 Nxd4 8. Qxd4 Bg7 9. Be3 0-0 10. Qd2 Ng4 11. Bd4 Ne5 12. 0-0 Nc4 13. Qe2 Bxd4 14. Qxc4 Bg7 15. Qb3 Bd7 16. Nd5 Bc6 17. c3 b5 18. Rad1 a5 19. e5 Ra6 20. exd6 exd6 21. Rfe1 Re8 22. Rxe8+ Bxe8 23. Bf1 a4 24. Qb4 a3 25. b3 Ra5 26. Ne7+ Kf8 27. Nc6 Bxc6 28. Rxd6 Qe7 29. Rd8+ Be8 30. Qxa5 Bf6 31. Rd3 Bc6 32. Qb4 Qxb4 33. cxb4 Be4 34. f3 Bxd3 35. Bxd3 Bc3 36. Kf2 Ke7 37. Ke3 Kd6 38. Bxb5 Bxb4 39. Kd4 h5 40. Bc4 Ke7 41. Bd5 g5 42. Kc4 Bd6 43. b4 Be5 44. Kb3 Bb2 45. b5 f6 46. h4 gxh4 47. gxh4 Kd6 48. Bf7 Kc5 49. Ka4 Bc3 50. Bxh5 Be1 51. Be8 Bxh4 52. Kxa3 f5 53. Kb3 f4 54. Kc3 Bf2 55. Kd3 Be3 56. Ke4 Kb6 1/2-1/2

[Event "Imperia op 29th"]
[Site "Imperia"]
[Date "1987.09.11"]
[Round "6.5"]
[White "Cortlever, Nicolaas"]
[Black "Karl, Hans"]
[Result "1/2-1/2"]
[ECO "C45"]
[WhiteElo "2375"]
[BlackElo "2320"]
[PlyCount "34"]
[EventDate "1987.09.06"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "ITA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. Bd3 d5 7. exd5 cxd5 8. 0-0 Be7 9. Nc3 0-0 10. Bg5 Be6 11. Qf3 h6 12. Bd2 Rb8 13. b3 Ng4 14. Bf5 Ne5 15. Qh3 Qd7 16. Bxe6 fxe6 17. Rae1 Rf5 1/2-1/2

[Event "Imperia op 29th"]
[Site "Imperia"]
[Date "1987.09.10"]
[Round "5.4"]
[White "Weindl, Alfred"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "A11"]
[WhiteElo "2295"]
[BlackElo "2375"]
[PlyCount "69"]
[EventDate "1987.09.06"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "ITA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 d5 5. c4 c6 6. Bg2 0-0 7. 0-0 Bf5 8. d3 Qc8 9. cxd5 cxd5 10. Qd2 Nc6 11. Rc1 Qd7 12. Nd4 Rac8 13. Nxc6 Rxc6 14. Rxc6 Qxc6 15. Nc3 Qd7 16. Rc1 Rc8 17. Nd1 Rc6 18. Ne3 Be6 19. Rxc6 bxc6 20. Qb4 Ng4 21. Ba3 Nxe3 22. fxe3 Bf8 23. Qb8 Bg4 24. Bf3 Kg7 25. Bc5 Bxf3 26. exf3 Qf5 27. Qf4 Qxf4 28. gxf4 a6 29. Kf1 Kf6 30. Ke2 Ke6 31. Kd2 Bg7 32. d4 Kd7 33. h3 e6 34. Kc2 Bf6 35. Kd2 1/2-1/2

[Event "Imperia op 29th"]
[Site "Imperia"]
[Date "1987.09.09"]
[Round "4.8"]
[White "Cortlever, Nicolaas"]
[Black "Demetz, Rainer"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "2375"]
[BlackElo "1900"]
[PlyCount "63"]
[EventDate "1987.09.06"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "ITA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 e6 5. Nf3 Nf6 6. Be2 Nc6 7. 0-0 Be7 8. c4 Qd8 9. dxc5 0-0 10. Nc3 Bxc5 11. Bg5 Be7 12. a3 e5 13. Qc2 Be6 14. Rfd1 Qc8 15. b4 Bf5 16. Qb2 e4 17. Nd4 Ne5 18. Qd2 Bg6 19. Qf4 Bd6 20. Qh4 Neg4 21. h3 h6 22. hxg4 hxg5 23. Qxg5 Re8 24. Nf5 Be5 25. Nd6 Qc7 26. Ncb5 Qe7 27. Nxe8 Rxe8 28. Rac1 Bb8 29. c5 e3 30. fxe3 Bg3 31. Nd6 Bf2+ 32. Kxf2 1-0

[Event "Imperia op 29th"]
[Site "Imperia"]
[Date "1987.09.08"]
[Round "3.8"]
[White "Piccardo, Marco"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "A48"]
[WhiteElo "2300"]
[BlackElo "2375"]
[PlyCount "32"]
[EventDate "1987.09.06"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "ITA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. Bf4 g6 4. e3 Bg7 5. Be2 0-0 6. 0-0 c5 7. c3 Nc6 8. Nbd2 b6 9. Ne5 Bb7 10. h3 Nd7 11. Nxc6 Bxc6 12. Nf3 Re8 13. Qd2 e5 14. dxe5 Nxe5 15. Nxe5 Bxe5 16. Bxe5 Rxe5 1/2-1/2

[Event "Imperia op 29th"]
[Site "Imperia"]
[Date "1987.09.07"]
[Round "2.4"]
[White "Cortlever, Nicolaas"]
[Black "Contini, Luca"]
[Result "1/2-1/2"]
[ECO "E19"]
[WhiteElo "2375"]
[BlackElo "2139"]
[PlyCount "43"]
[EventDate "1987.09.06"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "ITA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. g3 b6 4. Bg2 Bb7 5. c4 Be7 6. Nc3 Ne4 7. Qc2 Nxc3 8. Qxc3 0-0 9. 0-0 f5 10. Rd1 Bf6 11. Bf4 d6 12. Qe3 Qe7 13. Bg5 Nd7 14. Bxf6 Qxf6 15. Ne5 dxe5 16. Bxb7 Rab8 17. Bg2 exd4 18. Qxd4 Ne5 19. f4 Ng4 20. Qxf6 Nxf6 21. Rd3 Kf7 22. Bf3 1/2-1/2

[Event "Imperia op 29th"]
[Site "Imperia"]
[Date "1987.09.06"]
[Round "1.9"]
[White "Cortlever, Nicolaas"]
[Black "Blasco, Domenico"]
[Result "1-0"]
[ECO "D01"]
[WhiteElo "2375"]
[BlackElo "2041"]
[PlyCount "53"]
[EventDate "1987.09.06"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "ITA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. Nc3 d5 3. Bg5 c5 4. e4 Nxe4 5. Nxe4 dxe4 6. dxc5 Qxd1+ 7. Rxd1 a6 8. Bc4 Nc6 9. Bd5 Bf5 10. Ne2 e6 11. Bxc6+ bxc6 12. b4 a5 13. a3 axb4 14. axb4 h6 15. Be3 Ra4 16. Nd4 Bg4 17. f3 exf3 18. gxf3 Bh5 19. Nxc6 Be7 20. 0-0 Bf6 21. b5 0-0 22. b6 Ra3 23. Rd3 Ra6 24. Bd4 Bg6 25. Rc3 Rc8 26. Bxf6 gxf6 27. Ne7+ 1-0

[Event "Imperia op 21st"]
[Site "Imperia"]
[Date "1979.09.??"]
[Round "?"]
[White "Cortlever, Nicolaas"]
[Black "Hofman, Ron"]
[Result "0-1"]
[ECO "C02"]
[BlackElo "1910"]
[PlyCount "52"]
[EventDate "1979.09.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ITA"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. Nf3 Nc6 5. c3 Qb6 6. a3 c4 7. Nbd2 f6 8. exf6 Nxf6 9. b3 cxb3 10. Rb1 Bd6 11. Bd3 0-0 12. 0-0 e5 13. c4 Nxd4 14. Nxd4 Qxd4 15. Rxb3 Qh4 16. Be2 e4 17. h3 d4 18. Bb2 Bc5 19. Rg3 e3 20. Nf3 exf2+ 21. Kh2 Qf4 22. Bxd4 Bd6 23. Bxf2 Ne4 24. Qd5+ Kh8 25. Qd4 Nxg3 26. Qxf4 Nxf1+ 0-1

[Event "Imperia op 21st"]
[Site "Imperia"]
[Date "1979.09.??"]
[Round "?"]
[White "Gast, Jonathan"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "C69"]
[PlyCount "132"]
[EventDate "1979.09.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ITA"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 f6 6. d4 exd4 7. Nxd4 c5 8. Nb3 Qxd1 9. Rxd1 Be6 10. Bf4 Rd8 11. Rxd8+ Kxd8 12. Nc3 Kc8 13. Rd1 Bxb3 14. axb3 Ne7 15. Nd5 Nxd5 16. Rxd5 Be7 17. Kf1 Rd8 18. Rxd8+ Kxd8 19. Ke2 Kd7 20. Kd3 c6 21. Kc4 Ke6 22. Bc7 b5+ 23. Kd3 g6 24. Bf4 f5 25. c4 Bf6 26. Bc1 Bd4 27. f3 Be5 28. f4 Bd6 29. h3 h5 30. e5 g5 31. fxg5 Bxe5 32. Ke3 Kf7 33. Kf3 h4 34. Ke3 Kg6 35. Kd3 Bd6 36. Bd2 Kh5 37. Bc1 Be5 38. Ke2 Bc7 39. Kd3 Bd6 40. Bd2 Kg6 41. Bc1 Be5 42. Ke2 f4 43. Kf3 Kf5 44. g6 Kxg6 45. Ke4 Bf6 46. Bxf4 Bxb2 47. Bd6 bxc4 48. bxc4 Bd4 49. g3 hxg3 50. Bxg3 a5 51. Kd3 a4 52. Kc2 Kf5 53. Be1 Ke4 54. h4 a3 55. Kb3 Kd3 56. h5 a2 57. Kxa2 Kxc4 58. Bd2 Kd3 59. Bg5 c4 60. h6 c3 61. Kb3 c2 62. h7 c5 63. Bc1 Bc3 64. Bh6 c4+ 65. Ka4 Bh8 66. Kb4 c3 1/2-1/2

[Event "Imperia op 21st"]
[Site "Imperia"]
[Date "1979.09.??"]
[Round "?"]
[White "Vujovic, Milorad"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "C83"]
[WhiteElo "2315"]
[PlyCount "87"]
[EventDate "1979.09.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ITA"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 Be7 8. Re1 d5 9. dxe5 Be6 10. c3 0-0 11. Nbd2 Nc5 12. Bc2 d4 13. cxd4 Nxd4 14. Nxd4 Qxd4 15. Qe2 Rad8 16. Qh5 Nd3 17. Bxd3 Qxd3 18. a3 Rd4 19. h3 g6 20. Qh6 Rh4 21. Qe3 Qxe3 22. Rxe3 Rd8 23. Re1 Rhd4 24. Nf3 R4d5 25. Bg5 Kf8 26. b4 c5 27. bxc5 Rxc5 28. Re3 Rdd5 29. Rae1 Rc4 30. Bxe7+ Kxe7 31. Ng5 h6 32. Nh7 Rdc5 33. Nf6 h5 34. Rd1 Rc1 35. Rxc1 Rxc1+ 36. Kh2 Bc4 37. Ne4 Rc2 38. Kg3 Re2 39. Rxe2 Bxe2 40. Kf4 a5 41. g3 b4 42. axb4 axb4 43. Ke3 Bf1 44. Kd4 1/2-1/2

[Event "Hoogovens M-4K"]
[Site "Wijk aan Zee"]
[Date "1974.01.20"]
[Round "3"]
[White "Kerkmeester, Jan"]
[Black "Cortlever, Nicolaas"]
[Result "0-1"]
[ECO "C83"]
[PlyCount "85"]
[EventDate "1974.01.18"]
[EventType "tourn"]
[EventRounds "3"]
[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. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Be7 10. Be3 0-0 11. Nbd2 Nxd2 12. Qxd2 Na5 13. Bg5 Nc4 14. Bxc4 bxc4 15. b4 cxb3 16. axb3 c5 17. Ra3 Bxg5 18. Qxg5 f6 19. Qe3 fxe5 20. Nxe5 Qd6 21. f4 Rad8 22. Rfa1 Bc8 23. Nd3 d4 24. cxd4 cxd4 25. Qe5 Qg6 26. b4 h6 27. Qc7 Kh7 28. Ne5 Qd6 29. Qxd6 Rxd6 30. Nd3 Re8 31. Re1 Rxe1+ 32. Nxe1 Bf5 33. Nd3 Rb6 34. Nc5 Rxb4 35. Rxa6 Rb5 36. Na4 Rd5 37. Nb2 d3 38. Kf2 d2 39. Ra1 Bg4 40. Nd1 Rc5 41. h3 Rc1 42. hxg4 Rxa1 43. Ke2 0-1

[Event "Hoogovens M-4K"]
[Site "Wijk aan Zee"]
[Date "1974.01.19"]
[Round "2"]
[White "Cortlever, Nicolaas"]
[Black "Zuidema, Coen"]
[Result "1/2-1/2"]
[ECO "C01"]
[PlyCount "23"]
[EventDate "1974.01.18"]
[EventType "tourn"]
[EventRounds "3"]
[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. exd5 exd5 5. Qf3 Qe7+ 6. Nge2 Nf6 7. Bg5 Nbd7 8. a3 Bxc3+ 9. Qxc3 c6 10. 0-0-0 Ne4 11. Bxe7 Nxc3 12. Nxc3 1/2-1/2

[Event "Hoogovens M-4K"]
[Site "Wijk aan Zee"]
[Date "1974.01.18"]
[Round "1"]
[White "Barendregt, Johan"]
[Black "Cortlever, Nicolaas"]
[Result "0-1"]
[ECO "D09"]
[PlyCount "80"]
[EventDate "1974.01.18"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3 Bg4 6. Bg2 Qd7 7. 0-0 0-0-0 8. Re1 h5 9. h4 f6 10. exf6 Nxf6 11. Bf4 Bd6 12. Bxd6 Qxd6 13. Nbd2 Rhe8 14. a3 d3 15. exd3 Qxd3 16. Qa4 Nd7 17. Qb5 Nb6 18. Qg5 g6 19. c5 Nd7 20. Rxe8 Rxe8 21. Rc1 Nce5 22. Rc3 Qe2 23. Nxe5 Rxe5 24. Qh6 c6 25. b4 Qe1+ 26. Bf1 g5 27. Rd3 gxh4 28. gxh4 Re6 29. Qg7 Re7 30. Qh8+ Re8 31. Qd4 Rg8 32. Rg3 Ne5 33. Qe3 Qxe3 34. fxe3 Rd8 35. Ne4 Nf3+ 36. Kf2 Rf8 37. Rxg4 hxg4 38. Kg3 Nxh4 39. Nd6+ Kc7 40. Be2 Nf5+ 0-1

[Event "Amsterdam Seniors-Juniors"]
[Site "Amsterdam"]
[Date "1973.??.??"]
[Round "2"]
[White "Cortlever, Nicolaas"]
[Black "Hartoch, Robert G"]
[Result "1-0"]
[ECO "B47"]
[PlyCount "69"]
[EventDate "1973.03.??"]
[EventType "team"]
[EventRounds "2"]
[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. d4 cxd4 4. Nxd4 Nc6 5. Nc3 a6 6. g3 Qc7 7. Bg2 Nf6 8. 0-0 Bc5 9. Nxc6 bxc6 10. Na4 Be7 11. c4 d6 12. b3 0-0 13. Bd2 Nd7 14. Qe1 a5 15. f4 Bf6 16. Rd1 Bb7 17. g4 c5 18. Be3 Rfd8 19. g5 Be7 20. Qg3 Bf8 21. Rf2 Bc6 22. Nc3 a4 23. f5 Ne5 24. fxe6 fxe6 25. Bh3 Re8 26. Bf4 axb3 27. axb3 Rab8 28. Bxe5 dxe5 29. g6 Rxb3 30. Rdf1 Qd6 31. Qf3 hxg6 32. Qf7+ Kh8 33. Qxg6 Rxc3 34. Rxf8+ Rxf8 35. Rxf8+ 1-0

[Event "Hoogovens M-4K"]
[Site "Wijk aan Zee"]
[Date "1973.??.??"]
[Round "3"]
[White "Cortlever, Nicolaas"]
[Black "Smout, Henk"]
[Result "1-0"]
[ECO "C30"]
[PlyCount "81"]
[EventDate "1973.01.??"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. Bc4 Bc5 4. d3 Nc6 5. f4 d6 6. Nf3 Bg4 7. Na4 Bb6 8. Nxb6 axb6 9. 0-0 Nd4 10. fxe5 Bxf3 11. gxf3 dxe5 12. c3 Ne6 13. f4 exf4 14. Bxf4 0-0 15. Bg3 Ng5 16. Rf5 h6 17. h4 Ne6 18. Qf3 Qe7 19. Rf1 c6 20. Bf4 Nxf4 21. Rxf4 b5 22. Bb3 Rad8 23. d4 b4 24. Qg2 Kh8 25. Bc2 Nh5 26. Rg4 bxc3 27. bxc3 f5 28. exf5 Qe3+ 29. Kh2 Qxc3 30. f6 Rxf6 31. Rxg7 Nxg7 32. Rxf6 Qe3 33. Qg6 Qd2+ 34. Kh1 Qe1+ 35. Kg2 Nf5 36. Qxf5 Rg8+ 37. Rg6 Qd2+ 38. Kf3 Qc3+ 39. Bd3 Qxd4 40. Rxh6+ Kg7 41. Rh7# 1-0

[Event "Amsterdam Seniors-Juniors"]
[Site "Amsterdam"]
[Date "1973.??.??"]
[Round "1"]
[White "Hartoch, Robert G"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "D18"]
[PlyCount "50"]
[EventDate "1973.03.??"]
[EventType "team"]
[EventRounds "2"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. c4 c6 2. Nf3 Nf6 3. Nc3 d5 4. d4 dxc4 5. a4 Bf5 6. e3 Bd3 7. Bxd3 cxd3 8. Qxd3 g6 9. 0-0 Bg7 10. b4 0-0 11. Ba3 Nd5 12. Nxd5 cxd5 13. b5 Nd7 14. a5 Re8 15. Bb4 Rc8 16. Rac1 Rxc1 17. Rxc1 Nb8 18. Qb3 Qd7 19. Bd2 e6 20. Ne1 Rc8 21. Nd3 Rxc1+ 22. Bxc1 Qc7 23. Bd2 Nd7 24. Qc3 Qxc3 25. Bxc3 Bf8 1/2-1/2

[Event "Hoogovens M-4K"]
[Site "Wijk aan Zee"]
[Date "1973.??.??"]
[Round "1"]
[White "Henneberke, Frans"]
[Black "Cortlever, Nicolaas"]
[Result "0-1"]
[ECO "A03"]
[PlyCount "84"]
[EventDate "1973.01.??"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. f4 d5 2. b3 Nf6 3. e3 g6 4. Bb2 Bg7 5. Nf3 c5 6. Bb5+ Bd7 7. Be2 Nc6 8. 0-0 0-0 9. Qe1 d4 10. Qh4 Bf5 11. Na3 a6 12. Rae1 b5 13. Ne5 Nxe5 14. fxe5 Ne4 15. exd4 g5 16. Qh5 Bg6 17. Qh3 Nxd2 18. Rf2 Ne4 19. Rff1 cxd4 20. Bd3 Nc5 21. Bxg6 hxg6 22. Qg3 Ne6 23. c4 dxc3 24. Qxc3 Qb6+ 25. Qe3 Qxe3+ 26. Rxe3 Rac8 27. Rd1 Rfd8 28. Rxd8+ Rxd8 29. Kf2 Rd2+ 30. Re2 Rxe2+ 31. Kxe2 Nf4+ 32. Ke3 Nxg2+ 33. Ke4 Nf4 34. Nc2 f5+ 35. Kd4 Bxe5+ 36. Kxe5 Nd3+ 37. Ke6 Nxb2 38. Kxe7 Kg7 39. Nd4 f4 40. Ke6 g4 41. Ke5 f3 42. Nc2 Nd1 0-1

[Event "Hoogovens M-4K"]
[Site "Wijk aan Zee"]
[Date "1973.??.??"]
[Round "2"]
[White "Kuijpers, Frans"]
[Black "Cortlever, Nicolaas"]
[Result "1-0"]
[ECO "D19"]
[PlyCount "131"]
[EventDate "1973.01.??"]
[EventType "tourn"]
[EventRounds "3"]
[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. e3 e6 7. Bxc4 Bb4 8. 0-0 0-0 9. Qe2 Nbd7 10. e4 Bg4 11. h3 Bxf3 12. Qxf3 e5 13. d5 Nb6 14. Bb3 cxd5 15. Nxd5 Nbxd5 16. exd5 e4 17. Qe2 Re8 18. Rd1 Bd6 19. Be3 Qe7 20. a5 Qe5 21. g3 Qf5 22. Kg2 a6 23. Rac1 Nd7 24. Ba4 Re7 25. b4 h6 26. Bc5 Qe5 27. Bxd6 Qxd6 28. Bxd7 Rxd7 29. Qxe4 Rad8 30. Rc5 Re7 31. Qc4 Kh7 32. Rc8 Rxc8 33. Qxc8 Rc7 34. Qf5+ g6 35. Qe4 h5 36. Qd4 f6 37. h4 Kg7 38. Re1 Rd7 39. Rc1 Kf7 40. Rc5 Re7 41. b5 axb5 42. Rxb5 Rd7 43. Qe3 Kg7 44. Kh2 Re7 45. Qd4 Rd7 46. Qb2 Qe5 47. Rxb7 Qxb2 48. Rxb2 Rxd5 49. Ra2 Rd7 50. Kg2 Kf7 51. a6 Ra7 52. Kf3 Ke6 53. Ke4 Kd6 54. Kd4 Kc6 55. f4 Rd7+ 56. Kc4 Rc7 57. a7 Kb7+ 58. Kd5 Ka8 59. Ke6 Rc3 60. Rg2 f5 61. Kf7 Rc6 62. Ra2 Rb6 63. Ra3 Rc6 64. Re3 Ra6 65. Re8+ Kxa7 66. Re6 1-0

[Event "Match/Nation NED-ENG"]
[Site "Vlissingen"]
[Date "1972.10.29"]
[Round "2.6"]
[White "Cortlever, Nicolaas"]
[Black "Whiteley, Andrew Jonathan"]
[Result "1/2-1/2"]
[ECO "C02"]
[PlyCount "65"]
[EventDate "1972.10.28"]
[EventType "team-match"]
[EventRounds "2"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]
[WhiteTeam "Netherlands"]
[BlackTeam "England"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "ENG"]

1. e4 c5 2. c3 e6 3. d4 d5 4. e5 Nc6 5. Nf3 Qb6 6. a3 Bd7 7. b4 cxd4 8. cxd4 Rc8 9. Be3 Nce7 10. Bd3 Bb5 11. 0-0 Nf5 12. Qd2 Bxd3 13. Qxd3 Nxe3 14. fxe3 Nh6 15. Nc3 Be7 16. Rac1 Qc6 17. Ne2 Qd7 18. Rxc8+ Qxc8 19. Rc1 Qd7 20. Rc3 0-0 21. Qc2 Qb5 22. Ng3 a5 23. Rc7 Re8 24. bxa5 Bxa3 25. Ng5 g6 26. Nh5 Qxa5 27. Nf6+ Kh8 28. h3 Qe1+ 29. Kh2 Rf8 30. Nxe6 Nf5 31. Nxf8 Qg3+ 32. Kh1 Qe1+ 33. Kh2 1/2-1/2

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1972.01.29"]
[Round "15"]
[White "Krnic, Zdenko"]
[Black "Cortlever, Nicolaas"]
[Result "1-0"]
[ECO "C32"]
[PlyCount "47"]
[EventDate "1972.01.11"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Nf3 Bc5 7. Qe2 Bf5 8. Nc3 Qe7 9. Be3 Bxe3 10. Qxe3 Nxc3 11. Qxe7+ Kxe7 12. bxc3 Be4 13. Ng5 Bxd5 14. 0-0-0 Be6 15. Nxe6 fxe6 16. Bc4 Rf8 17. Rhe1 Rf6 18. f5 Na6 19. Bxe6 Nc5 20. Bg8+ Kf8 21. Bxh7 Rd6 22. Rd4 Rad8 23. Bg6 Nd7 24. g4 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1972.01.27"]
[Round "14"]
[White "Cortlever, Nicolaas"]
[Black "Van Scheltinga, Theo D"]
[Result "1-0"]
[ECO "B84"]
[PlyCount "61"]
[EventDate "1972.01.11"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[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 Be7 8. a4 Nc6 9. Kh1 0-0 10. f4 Bd7 11. Nb3 Na5 12. Nxa5 Qxa5 13. Qe1 Qc7 14. Bd3 g6 15. f5 Bc6 16. Bg5 exf5 17. exf5 d5 18. Qh4 Qd6 19. Rae1 Bd8 20. Re3 Nh5 21. f6 h6 22. Bxh6 Bxf6 23. Qg4 Bg7 24. Bxg7 Nxg7 25. Qg5 Rae8 26. Ref3 f5 27. Rg3 Rf6 28. Ne2 f4 29. Nxf4 Re5 30. Qh6 Nf5 31. Rxg6+ 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1972.01.26"]
[Round "13"]
[White "Enklaar, Bert F"]
[Black "Cortlever, Nicolaas"]
[Result "1-0"]
[ECO "D07"]
[PlyCount "67"]
[EventDate "1972.01.11"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nc6 3. Nc3 Nf6 4. Nf3 dxc4 5. e4 Bg4 6. Be3 Bxf3 7. gxf3 e5 8. d5 Ne7 9. Bxc4 Ng6 10. Qb3 Bd6 11. Qxb7 0-0 12. Qb3 Nh5 13. 0-0-0 Qf6 14. Rdg1 Ngf4 15. h4 a5 16. Rg4 Rfb8 17. Qc2 Kh8 18. Kb1 g6 19. Bb5 Rf8 20. a4 Qe7 21. Bc6 Rab8 22. Nb5 f5 23. Rgg1 fxe4 24. fxe4 Rf7 25. Ba7 Rd8 26. Nxd6 Rxd6 27. Bc5 Nf6 28. f3 Ng8 29. Qd2 Qd8 30. Rd1 Ne7 31. Qc3 Kg8 32. Bb5 Nexd5 33. exd5 Nxd5 34. Qb3 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1972.01.25"]
[Round "12"]
[White "Cortlever, Nicolaas"]
[Black "Hecht, Hans Joachim"]
[Result "0-1"]
[ECO "B05"]
[PlyCount "100"]
[EventDate "1972.01.11"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[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. exd6 cxd6 7. 0-0 Be7 8. c4 Nf6 9. Be3 0-0 10. Nc3 d5 11. b3 Nc6 12. Ne5 Bxe2 13. Qxe2 Qa5 14. Nxc6 bxc6 15. Bd2 dxc4 16. bxc4 Qf5 17. Nd1 Bd6 18. Qf3 Qxf3 19. gxf3 c5 20. dxc5 Bxc5 21. Be3 Rfc8 22. Rb1 Nd7 23. f4 Nb6 24. Rc1 g6 25. Rc2 Rc6 26. Bxc5 Rxc5 27. Ne3 Rd8 28. Kg2 Rd4 29. Kg3 Kf8 30. Rfc1 Ke7 31. Rc3 Rd7 32. R1c2 Rdc7 33. Ra3 Nc8 34. Kf3 Nd6 35. Ra6 h6 36. Rc3 g5 37. fxg5 hxg5 38. Rca3 Nc8 39. R3a5 f5 40. Rxc5 Rxc5 41. h3 Rc7 42. Ke2 Nb6 43. Ra5 Nd7 44. f3 Nb8 45. Nd1 Nc6 46. Ra6 Ne5 47. Nb2 Kf6 48. c5 Rxc5 49. Nd3 Rc2+ 50. Kd1 Nxd3 0-1

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1972.01.24"]
[Round "11"]
[White "Lehmann, Heinz"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "D93"]
[PlyCount "80"]
[EventDate "1972.01.11"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bf4 0-0 6. e3 c6 7. Be2 Qa5 8. 0-0 dxc4 9. Bxc4 Nbd7 10. a3 Nb6 11. Be2 Nbd5 12. Nxd5 Nxd5 13. Be5 Bg4 14. Bxg7 Kxg7 15. h3 Bxf3 16. Bxf3 Rfd8 17. Qc2 Rd7 18. Rfd1 Rad8 19. b4 Qb6 20. Rdc1 a5 21. Rab1 axb4 22. axb4 f6 23. Bg4 Rc7 24. Qb3 f5 25. Bf3 f4 26. Rc5 fxe3 27. fxe3 e6 28. b5 Rdd7 29. Qd3 cxb5 30. Rbxb5 Qa6 31. Qb3 Rxc5 32. Rxc5 Qd6 33. Rb5 Qc6 34. Qb2 Kf7 35. Rc5 Qd6 36. Qf2 Kg7 37. Rc1 Qa3 38. Re1 Qd6 39. e4 Nf4 40. Rd1 Rf7 1/2-1/2

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1972.01.22"]
[Round "10"]
[White "Cortlever, Nicolaas"]
[Black "Karaklajic, Nikola"]
[Result "1-0"]
[ECO "B13"]
[PlyCount "101"]
[EventDate "1972.01.11"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. c4 c6 4. d4 cxd5 5. Nc3 Nc6 6. Nf3 Bg4 7. cxd5 Nxd5 8. Qb3 Bxf3 9. gxf3 e6 10. Qxb7 Nxd4 11. Bb5+ Nxb5 12. Qc6+ Ke7 13. Qxb5 Nxc3 14. bxc3 Qd5 15. Rb1 Rd8 16. Be3 Qxb5 17. Rxb5 Rd7 18. Ke2 a6 19. Bc5+ Ke8 20. Rb8+ Rd8 21. Rhb1 Be7 22. R1b7 Rxb8 23. Rxb8+ Bd8 24. Ra8 Kd7 25. Bb6 Re8 26. Bxd8 Rxd8 27. Rxa6 Rb8 28. Ra7+ Kd6 29. Rxf7 Rb2+ 30. Ke3 Rxa2 31. Rxg7 Rc2 32. Rxh7 Rxc3+ 33. Kf4 e5+ 34. Kg3 Ke6 35. Rh4 Kf5 36. Rg4 Rc1 37. h4 Rg1+ 38. Kh3 Rd1 39. Kg2 Rd8 40. Kg3 Rh8 41. Rg5+ Kf6 42. Kg4 Ra8 43. Rf5+ Ke6 44. f4 exf4 45. h5 Ra1 46. Rxf4 Rg1+ 47. Kh4 Rh1+ 48. Kg5 Rg1+ 49. Kh6 Ke7 50. Kh7 Rg5 51. h6 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1972.01.21"]
[Round "9"]
[White "Scholl, Eddie C"]
[Black "Cortlever, Nicolaas"]
[Result "1-0"]
[ECO "B19"]
[PlyCount "111"]
[EventDate "1972.01.11"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 Qc7 11. Bd2 e6 12. 0-0-0 0-0-0 13. Qe2 Ngf6 14. Ne5 Nxe5 15. dxe5 Nd7 16. f4 Be7 17. Kb1 Rhe8 18. Be3 f6 19. exf6 Nxf6 20. Bd4 Bd6 21. Ne4 Nxe4 22. Qxe4 Bxf4 23. Bxa7 Qe5 24. Qxe5 Rxd1+ 25. Rxd1 Bxe5 26. Rf1 Bf6 27. Be3 Rd8 28. c3 Rh8 29. Kc2 Kd7 30. a4 e5 31. Kd3 Ke6 32. Ke4 Ra8 33. Ra1 Bg5 34. Bb6 Bd8 35. Bc5 b5 36. b3 Bc7 37. Ra2 bxa4 38. Rxa4 Rb8 39. b4 Bb6 40. Bxb6 Rxb6 41. Ra7 Kf6 42. Rd7 Ra6 43. Rd6+ Kg5 44. Rg6+ Kxh5 45. Rxg7 Ra3 46. Rg3 Kh4 47. Re3 Ra2 48. Kf3 Ra3 49. Re4+ Kg5 50. Rxe5+ Kf6 51. Rc5 Ra6 52. Ke4 Rb6 53. Kd4 Ra6 54. Ra5 Rb6 55. Kc5 Rb8 56. Ra6 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1972.01.20"]
[Round "8"]
[White "Cortlever, Nicolaas"]
[Black "Garcia Martinez, Silvino"]
[Result "1-0"]
[ECO "B22"]
[PlyCount "93"]
[EventDate "1972.01.11"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. Qxd4 e6 6. Bc4 Nc6 7. Qe4 d6 8. exd6 Qxd6 9. Bxd5 Qxd5 10. Qxd5 exd5 11. Be3 Ne5 12. b3 Bf5 13. Ne2 Nd3+ 14. Kd2 Be7 15. a4 0-0 16. Na3 Nc5 17. Bxc5 Bxc5 18. Nb5 Bd7 19. Nbd4 Bd6 20. g3 Rfe8 21. Rae1 g6 22. Nc1 Kg7 23. Nd3 a5 24. Rxe8 Rxe8 25. Re1 Rxe1 26. Nxe1 Kf6 27. Ng2 h6 28. Ne3 Ke5 29. f4+ Ke4 30. Nd1 Bxf4+ 31. gxf4 Kxf4 32. Nf2 Kg5 33. Ke3 f5 34. Nf3+ Kf6 35. Kd4 b5 36. axb5 Bxb5 37. Kxd5 a4 38. bxa4 Bxa4 39. Nd4 g5 40. c4 g4 41. Nd3 h5 42. Nf4 h4 43. c5 h3 44. Nde2 Kg5 45. Ke5 Bd7 46. Ng3 Bc8 47. c6 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1972.01.18"]
[Round "7"]
[White "Cafferty, Bernard"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "C55"]
[PlyCount "30"]
[EventDate "1972.01.11"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7 5. c3 0-0 6. Nbd2 d5 7. Bb5 Bd6 8. 0-0 Ne7 9. d4 Ng6 10. dxe5 Nxe5 11. Nxe5 Bxe5 12. Nf3 Bg4 13. exd5 Nxd5 14. h3 Bxf3 15. Qxf3 c6 1/2-1/2

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1972.01.17"]
[Round "6"]
[White "Cortlever, Nicolaas"]
[Black "Schmidt, Wlodzimierz"]
[Result "1-0"]
[ECO "B22"]
[PlyCount "125"]
[EventDate "1972.01.11"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. Qxd4 e6 6. Bc4 Nc6 7. Qe4 d6 8. exd6 Nf6 9. Qe2 Bxd6 10. Bg5 a6 11. a4 Ne5 12. Nd2 Nxc4 13. Nxc4 Be7 14. Nf3 b6 15. 0-0 Qc7 16. Nfe5 Bb7 17. Bf4 Bd5 18. Ne3 Qb7 19. Nxd5 Nxd5 20. Qf3 Qc8 21. Bh6 0-0 22. Qg3 Bf6 23. Ng4 Be7 24. Ne5 Bf6 25. Ng4 Be7 26. Ne3 Bf6 27. Nxd5 exd5 28. Rfd1 Qf5 29. Rd2 b5 30. h3 b4 31. cxb4 Rfb8 32. b5 axb5 33. Bf4 Rc8 34. a5 Ra6 35. Rad1 Rxa5 36. Rxd5 Qe4 37. Be5 Qg6 38. Bxf6 Qxf6 39. Qc3 Raa8 40. Qxf6 gxf6 41. Rxb5 Rc2 42. Rb7 Re8 43. b4 Ree2 44. Rd8+ Kg7 45. Rdd7 Rxf2 46. Rxf7+ Kg6 47. Rg7+ Kf5 48. Rg4 h5 49. Rb5+ Ke6 50. Rxh5 f5 51. Rg6+ Kf7 52. Rg3 Kf6 53. Rh6+ Kf7 54. Rh7+ Kf6 55. Rh6+ Kf7 56. Rgg6 f4 57. Rf6+ Ke7 58. Re6+ Kf7 59. Rhf6+ Kg7 60. Rg6+ Kf7 61. Ref6+ Ke7 62. Rf5 Rb2 63. Rg4 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1972.01.16"]
[Round "5"]
[White "Medina Garcia, Antonio Angel"]
[Black "Cortlever, Nicolaas"]
[Result "1-0"]
[ECO "C83"]
[PlyCount "112"]
[EventDate "1972.01.11"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[SourceTitle "MCD"]
[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 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Be7 10. Be3 0-0 11. Nbd2 Nxd2 12. Qxd2 Na5 13. Bc2 Nc4 14. Qd3 g6 15. Bh6 Re8 16. Qd4 f6 17. exf6 Bxf6 18. Qf4 Nd6 19. Bg5 Rf8 20. Rfe1 Bxg5 21. Qxg5 Qxg5 22. Nxg5 Bf5 23. Bxf5 Rxf5 24. Ne6 Rf7 25. Rad1 Re8 26. Nc5 Rxe1+ 27. Rxe1 a5 28. f3 Rf4 29. Re7 Rf7 30. Re5 Rf5 31. Re7 Rf7 32. Re2 Rf4 33. Re5 Rf5 34. Rxf5 Nxf5 35. Ne6 c6 36. Kf2 h6 37. g4 Ne7 38. f4 Kf7 39. Nc5 a4 40. Ke3 h5 41. h3 hxg4 42. hxg4 Ng8 43. Nd7 Ke6 44. Ne5 c5 45. Nxg6 Nf6 46. Ne5 d4+ 47. cxd4 Nd5+ 48. Ke4 Nf6+ 49. Kd3 c4+ 50. Kc2 Kd5 51. g5 Ne4 52. Nd7 Ng3 53. g6 Nf5 54. Kc3 Ke6 55. Ne5 Kf6 56. d5 Ke7 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1972.01.14"]
[Round "4"]
[White "Cortlever, Nicolaas"]
[Black "Sahovic, Dragutin"]
[Result "0-1"]
[ECO "C02"]
[PlyCount "83"]
[EventDate "1972.01.11"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Bd7 6. Na3 cxd4 7. cxd4 Nc6 8. Nc2 Rc8 9. Bd3 Nb4 10. Nxb4 Bxb4+ 11. Bd2 Bxd2+ 12. Qxd2 Bb5 13. 0-0 Ne7 14. Bxb5+ Qxb5 15. a4 Qb6 16. Rfc1 0-0 17. Qd3 h6 18. Qb5 Qxb5 19. axb5 a6 20. bxa6 bxa6 21. Kf1 Rxc1+ 22. Rxc1 Rb8 23. Rc2 g5 24. h3 Rb4 25. Ke2 Ng6 26. g3 Ne7 27. Rd2 Rb3 28. Ne1 Nc6 29. h4 gxh4 30. gxh4 Kg7 31. h5 a5 32. f4 Ne7 33. Kd1 Nf5 34. Kc2 Rh3 35. b3 Rxh5 36. Kc3 Rh3+ 37. Nd3 Ne7 38. Rg2+ Kf8 39. Kd2 Nf5 40. Nc5 Nxd4 41. Nd7+ Ke7 42. Nf6 0-1

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1972.01.13"]
[Round "3"]
[White "Gereben, Erno"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "D03"]
[PlyCount "29"]
[EventDate "1972.01.11"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. Bg5 Ne4 4. Bh4 d5 5. e3 h6 6. Nfd2 Nxd2 7. Nxd2 Bg7 8. Bd3 c5 9. c3 Qb6 10. Rb1 Nc6 11. 0-0 e5 12. e4 exd4 13. exd5 Ne5 14. Nc4 Nxc4 15. Bxc4 1/2-1/2

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1972.01.12"]
[Round "2"]
[White "Cortlever, Nicolaas"]
[Black "Ribli, Zoltan"]
[Result "0-1"]
[ECO "B81"]
[PlyCount "93"]
[EventDate "1972.01.11"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[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. h3 e6 7. g4 Nc6 8. g5 Nd7 9. Be3 Be7 10. h4 Qc7 11. f4 Na5 12. Qe2 b5 13. Bh3 Nb6 14. f5 b4 15. Nd1 e5 16. Nb3 Nac4 17. 0-0 a5 18. Nc1 Bb7 19. f6 gxf6 20. gxf6 Bf8 21. Kh2 Nxe3 22. Nxe3 Bxe4 23. Nd3 Bc6 24. Nf5 Nd7 25. Nd4 Bb7 26. a3 Kd8 27. Rae1 bxa3 28. bxa3 Qc4 29. Nf5 e4 30. Ng3 Rc8 31. Bxd7 Kxd7 32. Qg4+ Qe6 33. Qxe6+ fxe6 34. Nxe4 Rxc2+ 35. Kh3 e5 36. Rg1 Bxe4 37. Rxe4 Ke6 38. Ra4 Bh6 39. Rxa5 Rf8 40. Ra7 Be3 41. Re7+ Kxf6 42. Rgg7 Rc3 43. Nb4 Bh6+ 44. Kg4 Rc4+ 45. Kh5 Rxb4 46. Rxh7 Rd4 47. Kxh6 0-1

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1972.01.11"]
[Round "1"]
[White "Denker, Arnold Sheldon"]
[Black "Cortlever, Nicolaas"]
[Result "0-1"]
[ECO "D86"]
[PlyCount "102"]
[EventDate "1972.01.11"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[EventCategory "6"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 c5 7. Bc4 Bg7 8. Ne2 Nc6 9. Be3 cxd4 10. cxd4 b5 11. Bd5 Bd7 12. Rc1 Rc8 13. Bxc6 Rxc6 14. Rxc6 Bxc6 15. d5 Bd7 16. 0-0 a6 17. Nd4 0-0 18. Nc6 Bxc6 19. dxc6 Qc7 20. Qd7 Rc8 21. Rc1 Be5 22. g3 Rd8 23. Rd1 Rxd7 24. cxd7 Bd6 25. e5 Qxd7 26. exd6 exd6 27. h4 Qe6 28. Rd2 Kf8 29. Bf4 Ke7 30. Kh2 b4 31. Be3 a5 32. Bb6 Qf5 33. Be3 Kd7 34. Bf4 Qc5 35. Be3 Qc4 36. Bf4 d5 37. Be3 Kc6 38. Bd4 Kb5 39. Be3 Ka4 40. Bb6 Qc6 41. Bd8 Qd6 42. Bg5 d4 43. Rd3 Qe5 44. Rd2 Qd5 45. Bf6 d3 46. Kg1 Qe4 47. Bg5 Qe1+ 48. Kg2 Qxd2 49. Bxd2 Ka3 50. Kf3 Kxa2 51. Ke3 b3 0-1

[Event "Match/Nation GER-NED (3,5-6,5)(6,5-3,5)"]
[Site "Hitzacker"]
[Date "1971.05.??"]
[Round "1.7"]
[White "Cortlever, Nicolaas"]
[Black "Oechslein, Rainer"]
[Result "1-0"]
[ECO "C90"]
[PlyCount "51"]
[EventDate "1971.05.??"]
[EventType "team"]
[EventRounds "2"]
[EventCountry "GER"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 b5 6. Bb3 Be7 7. 0-0 0-0 8. Re1 d6 9. c3 Na5 10. Bc2 c5 11. Nbd2 Qc7 12. Nf1 Be6 13. Bg5 Rfd8 14. Ne3 Nc6 15. Qe2 Rac8 16. Bb3 Na5 17. Bd5 c4 18. d4 Bxd5 19. exd5 Nh5 20. Nf5 f6 21. dxe5 fxg5 22. exd6 Bxd6 23. Qe6+ Kf8 24. Nxg5 Nf6 25. Nh6 Re8 26. Qg8+ 1-0

[Event "Hoogovens M-4K A "]
[Site "Wijk aan Zee"]
[Date "1971.01.17"]
[Round "3"]
[White "Cortlever, Nicolaas"]
[Black "Kurajica, Bojan"]
[Result "1/2-1/2"]
[ECO "D58"]
[PlyCount "42"]
[EventDate "1971.01.15"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 0-0 7. Rc1 b6 8. cxd5 exd5 9. e3 Bb7 10. Bd3 Ne4 11. Bxe7 Qxe7 12. Ne5 c5 13. 0-0 Nxc3 14. Rxc3 c4 15. Bb1 Nd7 16. f4 b5 17. Qf3 Rfe8 18. e4 dxe4 19. Bxe4 Bxe4 20. Qxe4 Qd6 21. Kh1 Nf6 1/2-1/2

[Event "Hoogovens M-4K A "]
[Site "Wijk aan Zee"]
[Date "1971.01.16"]
[Round "2"]
[White "Henneberke, Frans"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "A02"]
[PlyCount "36"]
[EventDate "1971.01.15"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. f4 e5 2. fxe5 d6 3. exd6 Bxd6 4. Nf3 g5 5. d4 g4 6. Ne5 Bxe5 7. dxe5 Qxd1+ 8. Kxd1 Nc6 9. Nc3 Be6 10. Bg5 Nge7 11. e3 Rg8 12. Bf6 0-0-0+ 13. Bd3 Rd7 14. Ke2 h5 15. Rad1 Ng6 16. Be4 Ngxe5 17. Rxd7 Nxd7 18. Bh4 Nce5 1/2-1/2

[Event "Hoogovens M-4K A "]
[Site "Wijk aan Zee"]
[Date "1971.01.15"]
[Round "1"]
[White "Rischbieth, Norman"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "C47"]
[PlyCount "80"]
[EventDate "1971.01.15"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. g3 d5 4. exd5 Nxd5 5. Bg2 Nxc3 6. bxc3 Nc6 7. d3 Bd6 8. Nf3 0-0 9. 0-0 Bg4 10. h3 Bh5 11. Qe1 Qd7 12. Rb1 b6 13. Ng5 Bg6 14. h4 h6 15. Ne4 Be7 16. Nd2 Rad8 17. Nc4 Bf6 18. Qe2 Rfe8 19. Ne3 Be7 20. Bb2 Bc5 21. Nc4 f6 22. Nd2 Bf8 23. Kh2 Ne7 24. Ra1 Nf5 25. a4 Nd6 26. a5 f5 27. axb6 axb6 28. Kg1 Be7 29. Ra7 Bf6 30. c4 Nc8 31. Ra8 e4 32. Bxf6 gxf6 33. Qe3 exd3 34. Qxh6 Qg7 35. Qxg7+ Kxg7 36. cxd3 Rxd3 37. Bc6 Re7 38. Rxc8 Rxd2 39. Bd5 Bf7 40. Bxf7 Kxf7 1/2-1/2

[Event "Europe West Team U20-08"]
[Site "Zutphen "]
[Date "1971.??.??"]
[Round "?"]
[White "Cortlever, Nicolaas"]
[Black "Ligterink, Gert"]
[Result "1-0"]
[ECO "C02"]
[PlyCount "73"]
[EventDate "1971.06.18"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 c5 2. c3 e6 3. d4 d5 4. e5 Qb6 5. Nf3 Bd7 6. Be2 Bb5 7. dxc5 Bxc5 8. 0-0 Bxe2 9. Qxe2 Qa6 10. Qd2 Nd7 11. b4 Bf8 12. a4 Ne7 13. b5 Qb6 14. Ba3 Nc5 15. Nd4 Ng6 16. Qe3 Qc7 17. f4 Be7 18. Nd2 0-0 19. Kh1 f6 20. Qh3 fxe5 21. Bxc5 exd4 22. Qxe6+ Kh8 23. Bxe7 Nxe7 24. cxd4 Nf5 25. Rae1 Nxd4 26. Qxd5 Rxf4 27. Rxf4 Qxf4 28. Qxb7 Rf8 29. Nf3 Nc2 30. Re4 Qc1+ 31. Ng1 Ne3 32. Qf7 Qc8 33. Qxa7 Nd1 34. Re2 Qf5 35. Nf3 Nc3 36. Re1 h5 37. Qd4 1-0

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1970.07.27"]
[Round "11"]
[White "Westerinen, Heikki MJ"]
[Black "Cortlever, Nicolaas"]
[Result "0-1"]
[ECO "C80"]
[PlyCount "118"]
[EventDate "1970.07.14"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[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 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. Nxe5 Nxe5 9. dxe5 c6 10. c3 Be7 11. Be3 0-0 12. f3 Nc5 13. Bc2 f6 14. f4 fxe5 15. fxe5 Rxf1+ 16. Qxf1 Qf8 17. Nd2 Qxf1+ 18. Rxf1 Bg4 19. h3 Be2 20. Rf2 Bh5 21. b4 Na4 22. g4 Bg6 23. Bxg6 hxg6 24. Bd4 c5 25. bxc5 Nxc5 26. Nf1 Ne4 27. Rf3 Rc8 28. Rd3 Kf7 29. e6+ Kxe6 30. Bxg7 Rc4 31. Ne3 Bc5 32. Bd4 Bxd4 33. cxd4 Rc3 34. Ng2 g5 35. Ne1 b4 36. Kg2 a5 37. Kf3 Rc1 38. Re3 Rd1 39. Nc2 Rd2 40. Re2 Rxe2 41. Kxe2 Nc3+ 42. Kd2 Nxa2 43. Ne1 Nc3 44. Kc2 Kd6 45. Nf3 Ne4 46. Kb3 Kc6 47. Ka4 Kb6 48. h4 gxh4 49. Nxh4 Nc3+ 50. Kb3 Kb5 51. Nf3 a4+ 52. Kc2 Ne4 53. g5 b3+ 54. Kc1 a3 55. g6 Kb4 56. g7 Nf6 57. Kb1 Kc3 58. Ka1 Kc2 59. Ne1+ Kd2 0-1

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1970.07.25"]
[Round "10"]
[White "Cortlever, Nicolaas"]
[Black "Piket, Joop J"]
[Result "1-0"]
[ECO "B33"]
[PlyCount "80"]
[EventDate "1970.07.14"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 a6 6. Nd6+ Bxd6 7. Qxd6 Nf6 8. Nc3 Qe7 9. Qxe7+ Nxe7 10. Bg5 b5 11. Bd3 Bb7 12. f4 h6 13. Bh4 Ng6 14. Bxf6 gxf6 15. fxe5 fxe5 16. 0-0 d6 17. g3 Ke7 18. Rf2 Rh7 19. h4 Rg7 20. Kh2 Nf8 21. Nd1 Bc8 22. Ne3 Be6 23. a4 b4 24. a5 Nd7 25. Bc4 Nc5 26. Bd5 Rb8 27. Raf1 Rb5 28. Nf5+ Bxf5 29. Rxf5 Ne6 30. Bxe6 fxe6 31. Rf8 Rc5 32. Ra8 Rxc2+ 33. Kh3 Rc7 34. Rxa6 Rg8 35. Rb6 Ra8 36. a6 h5 37. Ra1 d5 38. exd5 exd5 39. Ra5 Rd7 40. Rb7 Ke6 1-0

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1970.07.24"]
[Round "9"]
[White "Adorjan, Andras"]
[Black "Cortlever, Nicolaas"]
[Result "1-0"]
[ECO "C63"]
[PlyCount "67"]
[EventDate "1970.07.14"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3 fxe4 5. Nxe4 Nf6 6. Nxf6+ Qxf6 7. Qe2 Be7 8. Bxc6 bxc6 9. d4 0-0 10. Bg5 Qe6 11. Bxe7 Qxe7 12. dxe5 Rb8 13. c3 d6 14. 0-0 Bg4 15. Qc4+ Be6 16. Qxc6 d5 17. Nd4 Rb6 18. Qa4 Bd7 19. Qxa7 Qxe5 20. Rae1 Qg5 21. f4 Qd8 22. b4 Bc8 23. Re5 Qd6 24. Qa5 Ba6 25. Nf5 Rb5 26. Qxb5 Bxb5 27. Nxd6 Bxf1 28. Re8 Bd3 29. Rxf8+ Kxf8 30. Nb7 Ke7 31. Kf2 Kf6 32. a4 Kf5 33. Nc5 Bc4 34. Ke3 1-0

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1970.07.22"]
[Round "8"]
[White "Cortlever, Nicolaas"]
[Black "Hamann, Svend"]
[Result "1-0"]
[ECO "A49"]
[PlyCount "119"]
[EventDate "1970.07.14"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 0-0 5. 0-0 c5 6. c3 b6 7. Ne5 d5 8. Be3 Na6 9. a4 Bb7 10. Na3 Ne8 11. Nd3 cxd4 12. Bxd4 f6 13. f4 Nd6 14. Qb3 e6 15. Rad1 Qe7 16. Nb5 Nc4 17. e4 Na5 18. Qa2 dxe4 19. b4 Bd5 20. Qf2 Nc4 21. Rfe1 f5 22. Ne5 Bxe5 23. Bxe5 Nxe5 24. fxe5 Nc7 25. Nd6 Bb3 26. Ra1 Qg7 27. Qd4 Ne8 28. Nb5 Rc8 29. Bf1 Bd5 30. c4 Bc6 31. c5 bxc5 32. Qxc5 Bb7 33. Qxa7 f4 34. gxf4 Rxf4 35. Ra2 Rg4+ 36. Rg2 Rxg2+ 37. Bxg2 Ra8 38. Qb6 Bd5 39. a5 Qxe5 40. Qd4 Qxd4+ 41. Nxd4 Nd6 42. Rc1 Kf7 43. Bf1 Ke8 44. a6 Kd7 45. b5 Nc8 46. Kf2 Rb8 47. Nc6 Ra8 48. Ke3 Kd6 49. Na5 Nb6 50. Nb7+ Bxb7 51. axb7 Nd5+ 52. Kxe4 Rb8 53. Rc6+ Kd7 54. Bh3 Nf6+ 55. Ke5 Rxb7 56. Rd6+ Kc7 57. Rc6+ Kd7 58. Kxf6 Rxb5 59. Rxe6 Kd8 60. Rd6+ 1-0

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1970.07.21"]
[Round "7"]
[White "Van Geet, Dick Daniel"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "A00"]
[PlyCount "28"]
[EventDate "1970.07.14"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. Nc3 d5 2. e4 dxe4 3. Nxe4 Nf6 4. Nxf6+ gxf6 5. b3 Qd5 6. Bb2 Bf5 7. Be2 Rg8 8. Bf3 Be4 9. Qe2 f5 10. 0-0-0 Nc6 11. Bxe4 fxe4 12. f3 exf3 13. Nxf3 0-0-0 14. Rhf1 e5 1/2-1/2

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1970.07.20"]
[Round "6"]
[White "Cortlever, Nicolaas"]
[Black "Van der Weide, Piet"]
[Result "1/2-1/2"]
[ECO "B83"]
[PlyCount "81"]
[EventDate "1970.07.14"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 d6 6. Be3 Nf6 7. Be2 Be7 8. 0-0 0-0 9. Kh1 Qc7 10. Ndb5 Qb8 11. a4 b6 12. f4 a6 13. Na3 Qc7 14. Bf3 Rb8 15. Qe2 Nb4 16. Rad1 Bb7 17. Rd4 d5 18. e5 Nd7 19. Rd2 Nc5 20. Qf2 Rfd8 21. Bd4 g6 22. Qe3 Nc6 23. g4 Nxd4 24. Rxd4 f6 25. Ne2 fxe5 26. fxe5 Nd7 27. Nf4 Bc5 28. Nxe6 Bxd4 29. Qxd4 Qxe5 30. Qxe5 Nxe5 31. Nxd8 Rxd8 32. Kg1 Kg7 33. Be2 Re8 34. Kf2 d4 35. Rd1 Rf8+ 36. Kg3 Bf3 37. Rd2 g5 38. Bxa6 Bxg4 39. Be2 Rf4 40. Nc4 Nxc4 41. Bxc4 1/2-1/2

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1970.07.18"]
[Round "5"]
[White "Marovic, Drazen"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "D78"]
[PlyCount "60"]
[EventDate "1970.07.14"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. g3 c6 4. Bg2 d5 5. Nf3 Bg7 6. 0-0 0-0 7. b3 Ne4 8. Bb2 a5 9. Nbd2 Nxd2 10. Nxd2 Na6 11. e3 Bf5 12. a3 Qd7 13. Qe2 b5 14. e4 dxe4 15. Nxe4 a4 16. cxb5 cxb5 17. bxa4 bxa4 18. Nc5 Nxc5 19. dxc5 Bd3 20. Qd2 Bxb2 21. Qxb2 Bxf1 22. Bxa8 Rxa8 23. Rxf1 h5 24. Rc1 Rc8 25. Qe5 Qd2 26. Rc4 Qd3 27. Rc3 Qb1+ 28. Kg2 Qb7+ 29. Kg1 Qb1+ 30. Kg2 Qb7+ 1/2-1/2

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1970.07.17"]
[Round "4"]
[White "Cortlever, Nicolaas"]
[Black "Bednarski, Jacek B"]
[Result "1/2-1/2"]
[ECO "B80"]
[PlyCount "112"]
[EventDate "1970.07.14"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 a6 6. g3 d6 7. Bg2 Bd7 8. 0-0 Be7 9. Be3 Nf6 10. h3 Qc7 11. Nde2 b5 12. a3 h5 13. f4 Rb8 14. Qd2 Bc8 15. Nc1 Na5 16. Nd3 Nc4 17. Qf2 Nxe3 18. Qxe3 Qb6 19. Qxb6 Rxb6 20. e5 Nd7 21. exd6 Bxd6 22. Ne4 Be7 23. Rae1 0-0 24. f5 Nf6 25. fxe6 Rxe6 26. Nf4 Re5 27. Nxf6+ Bxf6 28. Nd5 Rfe8 29. Nxf6+ gxf6 30. Rd1 Kg7 31. Rd2 Rg5 32. Kh2 Rc5 33. Rf4 Re3 34. Rdf2 f5 35. Bf3 Be6 36. Bxh5 Re1 37. c3 Rce5 38. Bf3 Rb1 39. Rd4 Ree1 40. h4 Bc4 41. Bb7 Be2 42. Rxf5 Rxb2 43. Kh3 Bc4 44. Bd5 Bxd5 45. Rdxd5 Rbe2 46. Rd7 Re7 47. Rxe7 Rxe7 48. Rc5 Re4 49. Rg5+ Kh7 50. Rf5 Kg7 51. Rf4 Re3 52. c4 bxc4 53. Rxc4 Rxa3 54. Rc6 Ra4 55. h5 Ra5 56. g4 Ra4 1/2-1/2

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1970.07.16"]
[Round "3"]
[White "Timman, Jan H"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "C69"]
[PlyCount "78"]
[EventDate "1970.07.14"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 f6 6. d4 Bg4 7. c3 Ne7 8. Be3 Ng6 9. Nbd2 Bd6 10. Qb3 Qc8 11. dxe5 Be6 12. c4 fxe5 13. Ng5 b5 14. Nxe6 Qxe6 15. c5 Qxb3 16. Nxb3 Be7 17. Na5 Bf6 18. Rfd1 Ne7 19. Rd2 Rd8 20. Rad1 Rxd2 21. Rxd2 h6 22. f4 exf4 23. Bxf4 Bg5 24. Bxg5 hxg5 25. Nb7 Kf7 26. Nd8+ Kf6 27. Rf2+ Kg6 28. Ne6 Rh4 29. Re2 Kf6 30. g3 Rh8 31. Nxc7 Ke5 32. Nxa6 Rd8 33. Rf2 g6 34. Nb4 Rd4 35. Rf7 Rd1+ 36. Kg2 Ke6 37. Rh7 Rd2+ 38. Kh3 Rxb2 39. a3 Re2 1/2-1/2

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1970.07.15"]
[Round "2"]
[White "Cortlever, Nicolaas"]
[Black "Prins, Lodewijk"]
[Result "1/2-1/2"]
[ECO "B28"]
[PlyCount "115"]
[EventDate "1970.07.14"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Ne2 a6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nf3 Bb4 7. Bd2 0-0 8. Bd3 d5 9. Nxd5 Nxd5 10. exd5 Bxd2+ 11. Nxd2 Qxd5 12. Qh5 h6 13. 0-0-0 Nc6 14. Nc4 Qc5 15. Rhe1 Be6 16. Nd6 Nb4 17. Qxe5 Qxf2 18. a3 Nxd3+ 19. Rxd3 Rad8 20. Rf3 Qxe1+ 21. Qxe1 Rxd6 22. Rd3 Rxd3 23. cxd3 Rd8 24. Qe3 Rd7 25. Kd2 h5 26. Qe5 g6 27. Ke3 Kf8 28. Qf6 Bd5 29. g3 Bc6 30. d4 Rd5 31. Kd3 Ke8 32. Kc4 Rf5 33. Qd6 Bb5+ 34. Kb4 Bc6 35. Kc3 Rd5 36. Qc7 Rf5 37. b3 Rd5 38. a4 Rf5 39. Kb4 Rd5 40. Kc4 Rf5 41. Qd6 Rg5 42. b4 Rf5 43. h4 Bg2 44. Kc3 Bc6 45. Kc4 Bg2 46. b5 axb5+ 47. axb5 Bf1+ 48. Kc3 Bg2 49. Kb4 Bf3 50. Qc7 Bd5 51. Qd6 Bf3 52. Kc4 Be2+ 53. Kc3 Bf3 54. Kb4 Bd5 55. Qc7 Bf3 56. Kc4 Be2+ 57. Kc3 Bf3 58. Kb4 1/2-1/2

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1970.07.14"]
[Round "1"]
[White "Tatai, Stefano"]
[Black "Cortlever, Nicolaas"]
[Result "1-0"]
[ECO "C81"]
[PlyCount "80"]
[EventDate "1970.07.14"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[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 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Qe2 Be7 10. Rd1 Nc5 11. Nc3 Nxb3 12. cxb3 0-0 13. h3 Qd7 14. Bg5 h6 15. Bxe7 Nxe7 16. Ne4 Rad8 17. Nc5 Qc8 18. Nd4 Nf5 19. Rac1 Nxd4 20. Rxd4 Rfe8 21. Qd2 c6 22. f4 Bf5 23. b4 f6 24. exf6 gxf6 25. g4 Be4 26. f5 Qc7 27. Qh2 Qe5 28. Qxe5 fxe5 29. Rd2 Bf3 30. Kf2 e4 31. Ke3 Rd6 32. Nb3 Kf7 33. Nd4 Kf6 34. Rdc2 Ke5 35. Rxc6 Bg2 36. Rxd6 Kxd6 37. Rc6+ Kd7 38. Rxh6 Rc8 39. Rh7+ Kd6 40. g5 Rc1 1-0

[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1970.01.31"]
[Round "15"]
[White "Westerinen, Heikki MJ"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "C63"]
[PlyCount "36"]
[EventDate "1970.01.13"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. d3 Nf6 5. exf5 d6 6. d4 Bxf5 7. dxe5 dxe5 8. Qxd8+ Rxd8 9. Nxe5 Bxc2 10. Nc3 Bd6 11. Nxc6 bxc6 12. Bxc6+ Kf7 13. 0-0 Rhf8 14. Be3 Ng4 15. Bd5+ Kg6 16. Bxa7 Bxh2+ 17. Kh1 Be5 18. Rac1 Rf5 1/2-1/2

[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1970.01.29"]
[Round "14"]
[White "Cortlever, Nicolaas"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[ECO "B81"]
[PlyCount "41"]
[EventDate "1970.01.13"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Nc3 a6 4. d4 cxd4 5. Nxd4 Nf6 6. h3 e6 7. g4 b5 8. Bg2 Bb7 9. g5 Nfd7 10. f4 Nc5 11. b4 Ncd7 12. 0-0 Nb6 13. a4 Qc7 14. Qd3 bxa4 15. Nxa4 N8d7 16. Nxb6 Nxb6 17. f5 e5 18. Nb3 Nc4 19. Nc5 dxc5 20. Qxc4 Bd6 21. Ba3 1/2-1/2

[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1970.01.28"]
[Round "13"]
[White "Ivkov, Borislav"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "A11"]
[PlyCount "132"]
[EventDate "1970.01.13"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 c6 3. b3 g6 4. Bb2 d5 5. g3 Bg7 6. Bg2 0-0 7. 0-0 Bg4 8. d3 Re8 9. Nbd2 Bxf3 10. Nxf3 e6 11. Qc2 Nbd7 12. Rac1 Ng4 13. Bxg7 Kxg7 14. b4 Qf6 15. h3 Nge5 16. Nd2 Nb6 17. a4 Rad8 18. b5 Qe7 19. c5 Nc8 20. d4 Nd7 21. Rb1 e5 22. e3 exd4 23. exd4 Nf8 24. Nf3 Ne6 25. Qd2 Qc7 26. Rfe1 Ne7 27. h4 Ng8 28. Bh3 Nf6 29. Qb2 Ne4 30. bxc6 bxc6 31. Qb7 Rd7 32. Qxc7 Rxc7 33. Bxe6 Rxe6 34. Re3 h6 35. a5 g5 36. a6 Ree7 37. Rb2 f6 38. hxg5 hxg5 39. Kg2 Kf7 40. Nh2 f5 41. Nf3 Kf6 42. Rb8 g4 43. Ne5 Nxc5 44. dxc5 Rxe5 45. Rf8+ Kg7 46. Rxe5 Kxf8 47. Rxf5+ Rf7 48. Rh5 Kg7 49. Rg5+ Kf6 50. Rxg4 Ke5 51. Rb4 d4 52. Rb7 Rf8 53. Rxa7 Kd5 54. Rd7+ Kxc5 55. f4 Kc4 56. Kf3 c5 57. g4 d3 58. g5 Kc3 59. g6 d2 60. Kg4 Rf6 61. f5 Rxa6 62. Kg5 c4 63. f6 Ra7 64. Rd6 Ra6 65. Rd7 Ra7 66. Rd6 Ra6 1/2-1/2

[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1970.01.27"]
[Round "12"]
[White "Cortlever, Nicolaas"]
[Black "Kuijpers, Frans"]
[Result "0-1"]
[ECO "B91"]
[PlyCount "80"]
[EventDate "1970.01.13"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Ne2 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 Be7 8. Bg2 Nbd7 9. 0-0 0-0 10. Be3 b5 11. Nd5 Nxd5 12. Qxd5 Rb8 13. Qd2 Nb6 14. b3 Bb7 15. a4 bxa4 16. Qa5 Bc8 17. Nc3 axb3 18. cxb3 Bg5 19. Bxg5 Qxg5 20. Rfd1 Rd8 21. f4 Qe7 22. fxe5 Bg4 23. Rxd6 Rxd6 24. exd6 Qxd6 25. h3 Be6 26. Rd1 Qc7 27. b4 h6 28. Nd5 Qxg3 29. Ne7+ Kh8 30. Nf5 Bxf5 31. exf5 Nc4 32. Qa2 Rxb4 33. Qf2 Qxf2+ 34. Kxf2 Rb2+ 35. Kf3 a5 36. Rd8+ Kh7 37. Ra8 Rb4 38. Kg3 a4 39. Bc6 a3 40. Bd5 Nb6 0-1

[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1970.01.26"]
[Round "11"]
[White "Platonov, Igor V"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "C77"]
[PlyCount "110"]
[EventDate "1970.01.13"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[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 Nf6 5. Qe2 b5 6. Bb3 Bc5 7. c3 0-0 8. d3 d6 9. Bg5 Be6 10. Bd5 Bxd5 11. exd5 Ne7 12. Bxf6 gxf6 13. c4 c6 14. dxc6 Bb4+ 15. Nbd2 bxc4 16. dxc4 Kh8 17. 0-0 Bxd2 18. Qxd2 Rc8 19. Rad1 Rxc6 20. b3 Rg8 21. Ne1 Ng6 22. Kh1 Qc8 23. f3 Qe6 24. Nc2 Nf4 25. Nd4 Qc8 26. Rf2 Rb6 27. Ne2 Ne6 28. Nc3 Rg6 29. Nd5 Rb7 30. Ne3 Nd4 31. Nc2 Nxc2 32. Qxc2 f5 33. Rfd2 Rb6 34. Rd5 Rc6 35. Qc3 Kg8 36. f4 e4 37. Qd4 h6 38. Re1 Kh7 39. Re2 Qe6 40. Kg1 Rg4 41. Qe3 Qf6 42. h3 Rg6 43. Red2 Qa1+ 44. Kh2 Qf6 45. Rc2 Qe6 46. Qd4 Qc8 47. Rd2 Kg8 48. Ra5 Re6 49. Rxf5 e3 50. Re2 Rc5 51. Rd5 Qc6 52. f5 Re8 53. f6 Re5 54. Rxd6 Qc7 55. Rd8+ Re8+ 1/2-1/2

[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1970.01.24"]
[Round "10"]
[White "Cortlever, Nicolaas"]
[Black "Benko, Pal C"]
[Result "1/2-1/2"]
[ECO "B06"]
[PlyCount "80"]
[EventDate "1970.01.13"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Ne2 g6 3. d4 Bg7 4. Nbc3 Na6 5. g3 d6 6. Bg2 cxd4 7. Nxd4 Nf6 8. 0-0 0-0 9. Nb3 Bg4 10. f3 Bd7 11. Qe2 Nc7 12. a4 a6 13. a5 Bc6 14. Rd1 Nd7 15. Be3 Rb8 16. Nd4 Nb5 17. Ncxb5 axb5 18. c3 Ra8 19. b4 Bxd4 20. cxd4 Nb8 21. d5 Bd7 22. Qb2 f6 23. f4 Na6 24. e5 Bf5 25. Bb6 Qe8 26. Rac1 Rc8 27. Bf1 Rxc1 28. Rxc1 dxe5 29. fxe5 Qd7 30. Bg2 fxe5 31. Qxe5 Qd6 32. Re1 Kf7 33. Qe3 Rc8 34. Qh6 Nxb4 35. Qxh7+ Ke8 36. Bh3 Nxd5 37. Bxf5 gxf5 38. Qh5+ Kd7 39. Qxf5+ e6 40. Qf7+ Qe7 1/2-1/2

[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1970.01.23"]
[Round "9"]
[White "Janosevic, Dragoljub"]
[Black "Cortlever, Nicolaas"]
[Result "1-0"]
[ECO "B14"]
[PlyCount "119"]
[EventDate "1970.01.13"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 g6 6. Qb3 Bg7 7. cxd5 0-0 8. Be2 Nbd7 9. Nh3 Nb6 10. Nf4 Bg4 11. Bxg4 Nxg4 12. h3 Nf6 13. 0-0 Qd7 14. d6 Qxd6 15. d5 Rfd8 16. Rd1 Qe5 17. a4 g5 18. a5 gxf4 19. axb6 a6 20. Ra4 Bh6 21. Rad4 Rd6 22. f3 Rad8 23. Ne4 Nxe4 24. Rxe4 Qf6 25. Rde1 Rxd5 26. Rxe7 Rb5 27. Qc4 Rxb6 28. Re8+ Bf8 29. Qxf4 Rxe8 30. Rxe8 Qxf4 31. Bxf4 Kg7 32. Be3 Rd6 33. g4 Rd7 34. h4 Bb4 35. h5 f6 36. Kg2 Bd2 37. h6+ Kf7 38. Rh8 Ke6 39. Kf2 Bxe3+ 40. Kxe3 Rc7 41. f4 Re7 42. f5+ Kd5+ 43. Kf4 Re4+ 44. Kf3 Re7 45. Rg8 Re1 46. Rg7 Rf1+ 47. Kg3 Rg1+ 48. Kf2 Rb1 49. Rxb7 Ke5 50. Kf3 Rf1+ 51. Kg2 Rb1 52. Rxh7 Rxb2+ 53. Kg3 Rb3+ 54. Kh4 Rb1 55. Kh5 Kf4 56. Rc7 Rh1+ 57. Kg6 Kxg4 58. Rc4+ Kf3 59. h7 a5 60. Rc8 1-0

[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1970.01.22"]
[Round "8"]
[White "Cortlever, Nicolaas"]
[Black "Langeweg, Kick"]
[Result "1/2-1/2"]
[ECO "B56"]
[PlyCount "41"]
[EventDate "1970.01.13"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Ne2 Nf6 3. Nbc3 Nc6 4. d4 cxd4 5. Nxd4 d6 6. g3 Nxd4 7. Qxd4 g6 8. Bg5 Bg7 9. Bb5+ Bd7 10. Bxd7+ Qxd7 11. Nd5 0-0 12. Bxf6 exf6 13. Nxf6+ Bxf6 14. Qxf6 Qa4 15. 0-0 Qxc2 16. Rac1 Qxe4 17. Rfe1 Qd5 18. a3 Rae8 19. Red1 Qe6 20. Qxe6 Rxe6 21. Rc7 1/2-1/2

[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1970.01.20"]
[Round "7"]
[White "Bobotsov, Milko Georgiev"]
[Black "Cortlever, Nicolaas"]
[Result "1-0"]
[ECO "D94"]
[PlyCount "149"]
[EventDate "1970.01.13"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 c6 3. Nf3 d5 4. e3 g6 5. d4 Bg7 6. Bd3 Bf5 7. cxd5 Bxd3 8. Qxd3 cxd5 9. Qb5+ Qd7 10. Ne5 Qxb5 11. Nxb5 Na6 12. Bd2 Nd7 13. Nd3 0-0 14. Rc1 e5 15. dxe5 Nxe5 16. Nxe5 Bxe5 17. Bc3 Bxc3+ 18. Rxc3 Nb4 19. a3 Nc6 20. Rd3 Rad8 21. Ke2 Rfe8 22. Rhd1 Re5 23. f4 Rh5 24. h3 Kg7 25. Nc3 Ne7 26. Kf2 Rc8 27. R1d2 b6 28. Kg1 Rc5 29. Kh2 Rf5 30. g4 Rf6 31. Nxd5 Nxd5 32. Rxd5 Rxd5 33. Rxd5 Rc6 34. Rd2 Rc1 35. Re2 Kf6 36. Kg3 b5 37. g5+ Ke6 38. e4 b4 39. axb4 Rc4 40. Kg4 Rxb4 41. h4 a5 42. h5 a4 43. h6 Kd6 44. Rd2+ Ke7 45. e5 Rb3 46. Rd4 a3 47. bxa3 Rxa3 48. Rb4 Ra8 49. Kf3 Ke6 50. Rb6+ Ke7 51. Rc6 Kd7 52. Rd6+ Ke7 53. Rb6 Ra3+ 54. Ke4 Ra4+ 55. Kf3 Ra3+ 56. Kg4 Ra8 57. Rb7+ Ke6 58. Rc7 Rd8 59. Rc6+ Ke7 60. Kf3 Ra8 61. Ke4 Kd7 62. Kd5 Ra1 63. Rc4 Rd1+ 64. Rd4 Ra1 65. Rb4 Ra5+ 66. Ke4 Ra8 67. f5 gxf5+ 68. Kxf5 Ke7 69. Rb7+ Kf8 70. g6 hxg6+ 71. Kg5 Re8 72. e6 Ra8 73. Rxf7+ Kg8 74. Kxg6 Kh8 75. e7 1-0

[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1970.01.19"]
[Round "6"]
[White "Cortlever, Nicolaas"]
[Black "Kavalek, Lubomir"]
[Result "1/2-1/2"]
[ECO "E62"]
[PlyCount "89"]
[EventDate "1970.01.13"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[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. g3 0-0 5. Nf3 d6 6. Bg2 Nc6 7. 0-0 Bf5 8. d5 Na5 9. Nd4 Bd7 10. Qd3 c5 11. Nb3 Nxb3 12. axb3 a6 13. e4 b5 14. h3 Qb6 15. f4 Ne8 16. g4 Rb8 17. Bd2 Nc7 18. Rfe1 e6 19. Kh1 exd5 20. Nxd5 Nxd5 21. cxd5 Bxb2 22. Ra2 Bd4 23. Ba5 Qa7 24. Bc3 Bxc3 25. Qxc3 b4 26. Qa1 Bb5 27. e5 Rbe8 28. f5 Rxe5 29. Rxe5 dxe5 30. Qxe5 Re8 31. Qf4 Qe7 32. Rc2 Qe3 33. Qxe3 Rxe3 34. Rxc5 Rc3 35. Rxc3 bxc3 36. Be4 Be2 37. d6 Kf8 38. fxg6 hxg6 39. Bc2 Ke8 40. Kg1 Kd7 41. Kf2 Bb5 42. h4 Kxd6 43. h5 gxh5 44. gxh5 Ke7 45. h6 1/2-1/2

[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1970.01.18"]
[Round "5"]
[White "Cortlever, Nicolaas"]
[Black "Donner, Jan Hein"]
[Result "0-1"]
[ECO "B91"]
[PlyCount "150"]
[EventDate "1970.01.13"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[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. g3 e5 7. Nde2 Be7 8. Bg2 Nbd7 9. 0-0 Qc7 10. h3 b5 11. Be3 Bb7 12. a4 b4 13. Nd5 Nxd5 14. exd5 0-0 15. c3 bxc3 16. Nxc3 Rfc8 17. Qd2 Nb6 18. Bxb6 Qxb6 19. a5 Qd4 20. Qxd4 exd4 21. Ne2 Rc4 22. Rfd1 Bf6 23. b3 Rb4 24. Ra4 Rxb3 25. Nxd4 Bxd4 26. Rdxd4 Rc8 27. Be4 Rc5 28. Rab4 Rb5 29. Rxb5 Rxb5 30. Bd3 Rb2 31. Rc4 g6 32. Rc7 Bxd5 33. Bxa6 Ra2 34. Rc1 Rxa5 35. Bf1 Be6 36. Rd1 d5 37. Kg2 Kg7 38. h4 Kf6 39. Rd2 Ke5 40. Bd3 Ra3 41. f3 h6 42. Kf2 g5 43. hxg5 hxg5 44. Bb1 Bd7 45. Re2+ Kd6 46. Ra2 Rb3 47. Bc2 Rc3 48. Bd1 Bb5 49. Ra5 Bc4 50. f4 gxf4 51. gxf4 Kc6 52. Bh5 f5 53. Bg6 Bd3 54. Ke3 Bb1+ 55. Kd4 Rc4+ 56. Ke5 Re4+ 57. Kxf5 Ra4+ 58. Ke5 Rxa5 59. Bxb1 Ra1 60. Bc2 Re1+ 61. Kd4 Kd6 62. Bd3 Rh1 63. Ke3 Rh3+ 64. Ke2 Kc5 65. Bf5 Ra3 66. Bg6 Kd4 67. Bf5 Re3+ 68. Kf2 Re8 69. Kf3 Kc3 70. Bg6 Rh8 71. Bf5 d4 72. Bd7 d3 73. Ke4 d2 74. Bg4 Re8+ 75. Kd5 Rg8 0-1

[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1970.01.16"]
[Round "4"]
[White "Hort, Vlastimil"]
[Black "Cortlever, Nicolaas"]
[Result "1-0"]
[ECO "D93"]
[PlyCount "83"]
[EventDate "1970.01.13"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 c6 6. Nf3 0-0 7. h3 b6 8. Rc1 e6 9. cxd5 exd5 10. Be2 Bb7 11. 0-0 Qe7 12. Qa4 a5 13. Ne5 Nfd7 14. Nxd7 Qxd7 15. Qb3 Qd8 16. Rfd1 Nd7 17. e4 a4 18. Qc2 Qf6 19. Qd2 dxe4 20. Nxe4 Qe7 21. Bf3 Nf6 22. Nd6 Nd5 23. Re1 Qd7 24. Bxd5 cxd5 25. Qb4 b5 26. Nxb5 Ba6 27. Nc7 Rab8 28. Qd6 Bb5 29. Rc5 Qxd6 30. Bxd6 Bc4 31. Nxd5 Bxd5 32. Bxb8 Bxa2 33. Be5 f6 34. Bd6 Rd8 35. Rc6 Bd5 36. Rb6 Rd7 37. Re7 Rxe7 38. Bxe7 Kf7 39. Bd8 f5 40. Ra6 Ke8 41. Bf6 Bh6 42. Rxa4 1-0

[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1970.01.15"]
[Round "3"]
[White "Cortlever, Nicolaas"]
[Black "Kurajica, Bojan"]
[Result "1/2-1/2"]
[ECO "D55"]
[PlyCount "68"]
[EventDate "1970.01.13"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bxf6 Bxf6 7. e3 0-0 8. Bd3 c5 9. cxd5 exd5 10. dxc5 Bxc3+ 11. bxc3 Qa5 12. 0-0 Qxc5 13. Rc1 Nc6 14. c4 Be6 15. Nd4 Nxd4 16. exd4 Qa5 17. c5 Qd8 18. Bb1 Re8 19. Re1 Bd7 20. Qd3 g6 21. Rxe8+ Qxe8 22. Qd2 Qf8 23. h3 Rc8 24. Qa5 a6 25. Re1 Qd8 26. Qd2 Kg7 27. Re5 Bc6 28. Bd3 Rb8 29. f4 b6 30. f5 g5 31. cxb6 Rxb6 32. Qe2 Qd6 33. h4 Bb5 34. hxg5 hxg5 1/2-1/2

[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1970.01.14"]
[Round "2"]
[White "Filip, Miroslav"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "A16"]
[PlyCount "52"]
[EventDate "1970.01.13"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 c6 5. e4 d6 6. Nge2 Nbd7 7. 0-0 0-0 8. d4 Rb8 9. h3 b5 10. cxb5 cxb5 11. a3 a5 12. b4 Nb6 13. Nxb5 axb4 14. axb4 Nbd5 15. exd5 Rxb5 16. Qb3 Qb6 17. Ba3 Bf5 18. Nc3 Ra5 19. Rfe1 Ra7 20. Rad1 h5 21. Bb2 Rb8 22. b5 Ne8 23. Qb4 Bf6 24. Bf1 Nc7 25. Bc1 Bd7 26. Be3 Nxb5 1/2-1/2

[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1970.01.13"]
[Round "1"]
[White "Cortlever, Nicolaas"]
[Black "Taimanov, Mark E"]
[Result "0-1"]
[ECO "B46"]
[PlyCount "90"]
[EventDate "1970.01.13"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 a6 6. g3 Nge7 7. Bg2 Nxd4 8. Qxd4 Nc6 9. Qd1 Be7 10. 0-0 0-0 11. Be3 Qc7 12. Ne2 b5 13. Qd2 Bb7 14. c3 Ne5 15. Bf4 d6 16. b3 Rfd8 17. Rac1 Rac8 18. h3 Ng6 19. c4 Nxf4 20. Nxf4 Qb6 21. cxb5 axb5 22. Rxc8 Rxc8 23. Rc1 Rxc1+ 24. Qxc1 g6 25. Qc3 b4 26. Qe3 Qa5 27. Qd2 Qc5 28. Qe3 Qa5 29. Qd2 Qb5 30. Qe2 Qc6 31. Kh2 Ba6 32. e5 d5 33. Qe3 Qc5 34. Kg1 Qxe3 35. fxe3 Bc5 36. Kf2 d4 37. Bf1 dxe3+ 38. Ke1 Bb7 39. Nd3 Bd4 40. Kd1 Ba6 41. Be2 Bxd3 42. Bxd3 Bxe5 43. g4 f5 44. Be2 Bc3 45. Kc2 Bd2 0-1

[Event "Amsterdam AMRO"]
[Site "Amsterdam"]
[Date "1970.??.??"]
[Round "?"]
[White "Cortlever, Nicolaas"]
[Black "Langeweg, Kick"]
[Result "1-0"]
[ECO "B46"]
[PlyCount "84"]
[EventDate "1970.??.??"]
[EventType "tourn"]
[EventRounds "12"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 a6 6. g3 Nxd4 7. Qxd4 Ne7 8. f4 b5 9. Bg2 Bb7 10. 0-0 Rc8 11. Qf2 Nc6 12. Be3 Na5 13. f5 Qc7 14. fxe6 dxe6 15. b3 Bc5 16. Nd1 Bxe3 17. Nxe3 0-0 18. Rad1 Nc6 19. Qf4 Nb4 20. Rf2 Qxf4 21. gxf4 Nxa2 22. Rd7 Bc6 23. Ra7 Nc3 24. e5 Bxg2 25. Rxg2 Ra8 26. Rc7 Rfc8 27. Rb7 Ne4 28. Ng4 Kf8 29. Re2 Nc5 30. Rb6 Rab8 31. Rd6 a5 32. Nf2 Ra8 33. Nd1 a4 34. Nc3 Nxb3 35. Nxb5 Nc1 36. Re3 Rxc2 37. Rd7 Ne2+ 38. Kf1 Nxf4 39. Nd6 a3 40. Rxf7+ Kg8 41. Rb7 a2 42. Ra3 a1Q+ 1-0

[Event "Amsterdam AMRO"]
[Site "Amsterdam"]
[Date "1970.??.??"]
[Round "?"]
[White "Enklaar, Bert F"]
[Black "Cortlever, Nicolaas"]
[Result "0-1"]
[ECO "D93"]
[PlyCount "46"]
[EventDate "1970.??.??"]
[EventType "tourn"]
[EventRounds "12"]
[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 d5 4. Bf4 Bg7 5. e3 c6 6. h3 0-0 7. Nf3 Qa5 8. Nd2 Ne4 9. Ndxe4 dxe4 10. Qc2 f5 11. 0-0-0 Nd7 12. Bg5 Re8 13. f4 exf3 14. gxf3 e5 15. c5 b5 16. cxb6 Nxb6 17. dxe5 Bxe5 18. h4 Be6 19. h5 Nd5 20. Nxd5 cxd5 21. Kb1 Rec8 22. Qd2 Rab8 23. b3 Rxb3+ 0-1

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1969.02.01"]
[Round "15"]
[White "Ujtelky, Maximilian"]
[Black "Cortlever, Nicolaas"]
[Result "0-1"]
[ECO "A12"]
[PlyCount "46"]
[EventDate "1969.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. c4 c6 2. Nf3 Nf6 3. b3 g6 4. Bb2 d5 5. h3 Bg7 6. g4 h6 7. Bg2 0-0 8. 0-0 Nbd7 9. Qc2 Re8 10. d4 h5 11. g5 Ne4 12. Nh4 e5 13. cxd5 cxd5 14. Nd2 Qxg5 15. Nhf3 Qf5 16. dxe5 Nxe5 17. Nd4 Qg5 18. f4 Qg3 19. Nxe4 dxe4 20. Qxe4 Bxh3 21. fxe5 Bxe5 22. Nf5 Qh2+ 23. Kf2 Bxg2 0-1

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1969.01.30"]
[Round "14"]
[White "Cortlever, Nicolaas"]
[Black "Sandor, Bela"]
[Result "1/2-1/2"]
[ECO "B07"]
[PlyCount "36"]
[EventDate "1969.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[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. g3 Bg7 5. Bg2 0-0 6. Nge2 Na6 7. 0-0 c5 8. h3 cxd4 9. Nxd4 Nc5 10. Be3 Bd7 11. Qd2 a6 12. a4 a5 13. Nb3 Nxb3 14. cxb3 Be6 15. Nd5 Nxd5 16. exd5 Bd7 17. b4 b5 18. bxa5 Rxa5 1/2-1/2

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1969.01.29"]
[Round "13"]
[White "Honfi, Karoly"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "C83"]
[PlyCount "152"]
[EventDate "1969.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[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 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Be7 10. Be3 0-0 11. Nbd2 Nxd2 12. Qxd2 Na5 13. Nd4 Nc4 14. Bxc4 dxc4 15. f4 Bd7 16. f5 c5 17. f6 cxd4 18. Bxd4 Re8 19. fxe7 Qxe7 20. Rf3 Bg4 21. Rg3 Bf5 22. Rf1 Bg6 23. Qf4 Qb7 24. Rg4 Re6 25. Qg3 Rae8 26. h4 h5 27. Rgf4 b4 28. R1f2 bxc3 29. Bxc3 Rd8 30. Rxc4 Rd1+ 31. Kh2 Qd5 32. Rc8+ Kh7 33. Qf3 Qxf3 34. gxf3 Rc1 35. Rc7 Kg8 36. Rd2 Rc2 37. Rxc2 Bxc2 38. Kg3 Bb1 39. a3 Ba2 40. Kf4 Bd5 41. Rc8+ Kh7 42. Rc5 Bc6 43. Bd4 Kg6 44. Rc1 Bd5 45. Rg1+ Kh7 46. Bc5 f6 47. Bd4 fxe5+ 48. Bxe5 Re7 49. Rg5 Rf7+ 50. Ke3 Bxf3 51. Bxg7 Bg4 52. Be5 Rd7 53. Bd4 Rd6 54. b4 Rg6 55. Rc5 Re6+ 56. Be5 Kg6 57. Kf4 Kf7 58. a4 Rb6 59. b5 axb5 60. a5 Ra6 61. Rxb5 Bd7 62. Rb7 Ke7 63. Bc7 Rg6 64. Rb8 Rg4+ 65. Ke5 Bc6 66. Rh8 Kd7 67. Rh7+ Kc8 68. Bb6 Bf3 69. a6 Rb4 70. Rc7+ Kd8 71. Ba5 Ra4 72. Rc5+ Kd7 73. a7 Re4+ 74. Kf6 Re6+ 75. Kg5 Ra6 76. Bc3 Bg4 1/2-1/2

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1969.01.28"]
[Round "12"]
[White "Cortlever, Nicolaas"]
[Black "Scholl, Eddie C"]
[Result "1-0"]
[ECO "B80"]
[PlyCount "84"]
[EventDate "1969.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[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 Nc6 5. Nc3 Qc7 6. g3 a6 7. Bg2 Nf6 8. 0-0 Be7 9. b3 0-0 10. Bb2 d6 11. Nce2 e5 12. Nxc6 bxc6 13. c4 a5 14. Nc3 Nd7 15. Qd2 Nc5 16. Rad1 Bg4 17. f3 Be6 18. Ba3 Rfd8 19. Qf2 Qb7 20. Rd2 Na6 21. f4 f6 22. Rfd1 Nb4 23. Na4 c5 24. Nc3 Nc6 25. Bb2 Nd4 26. Re1 Rdb8 27. Bf3 Bd8 28. Bd1 a4 29. Nxa4 Rxa4 30. Bxd4 exd4 31. bxa4 Ba5 32. Bb3 Qa6 33. Rc1 Bxd2 34. Qxd2 Rb4 35. Qd3 Bd7 36. Re1 Bxa4 37. e5 fxe5 38. Qf5 Bxb3 39. Qe6+ Kf8 40. Rxe5 dxe5 41. Qxa6 Bxc4 42. Qa8+ Kf7 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1969.01.27"]
[Round "11"]
[White "Jongsma, Alexander"]
[Black "Cortlever, Nicolaas"]
[Result "0-1"]
[ECO "A11"]
[PlyCount "66"]
[EventDate "1969.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. Nf3 d5 2. c4 c6 3. b3 Nf6 4. Bb2 g6 5. g3 Bg7 6. Bg2 0-0 7. 0-0 Bg4 8. d3 Re8 9. Nbd2 Nbd7 10. h3 Bxf3 11. Bxf3 e5 12. cxd5 cxd5 13. Bg2 Rc8 14. b4 Bh6 15. Nb3 Qe7 16. a3 b6 17. Bc1 Bg7 18. Be3 Qe6 19. d4 Ne4 20. Rc1 Nc3 21. Qd2 exd4 22. Nxd4 Bxd4 23. Bxd4 Nxe2+ 24. Kh2 Rxc1 25. Rxc1 Nxc1 26. Qxc1 Ne5 27. Qc7 Qf6 28. Kh1 Qf5 29. g4 Qf4 30. Be3 Qc4 31. Qxa7 d4 32. Bh6 Qc2 33. Qxb6 Nf3 0-1

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1969.01.25"]
[Round "10"]
[White "Cortlever, Nicolaas"]
[Black "Bredewout, Henk J"]
[Result "1/2-1/2"]
[ECO "A49"]
[PlyCount "45"]
[EventDate "1969.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. 0-0 0-0 5. d4 d6 6. c3 c5 7. dxc5 dxc5 8. Be3 Qc7 9. Bf4 Qb6 10. Qc1 Be6 11. Ng5 Bd5 12. e4 Bc6 13. Nd2 Nbd7 14. Re1 Ng4 15. Nc4 Qa6 16. Ne3 Nxe3 17. Bxe3 b6 18. Qc2 Qb7 19. f4 Nf6 20. e5 Nd5 21. a3 h6 22. Nh3 Rad8 23. Bf2 1/2-1/2

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1969.01.24"]
[Round "9"]
[White "Kozma, Julius"]
[Black "Cortlever, Nicolaas"]
[Result "0-1"]
[ECO "D97"]
[PlyCount "120"]
[EventDate "1969.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 0-0 7. e4 Na6 8. Qa4 c5 9. d5 Bd7 10. Bb5 Nb4 11. 0-0 a6 12. Bxd7 Qxd7 13. Qd1 c4 14. Ne1 e6 15. a3 a5 16. dxe6 Qxd1 17. Nxd1 Nc6 18. exf7+ Rxf7 19. Nc3 Re8 20. Nf3 Rfe7 21. Bg5 h6 22. Bxf6 Bxf6 23. Rab1 Rd7 24. Nd5 Kf7 25. Nd2 b5 26. Rfd1 Ne7 27. Nxf6 Kxf6 28. Nf1 Red8 29. Ne3 Rxd1+ 30. Nxd1 Ke5 31. f3 Rd2 32. Kf1 Nc6 33. Nc3 b4 34. axb4 axb4 35. Nd5 Kd4 36. Ke1 Rxg2 37. Rd1+ Kc5 38. Rd2 Rg1+ 39. Kf2 Rb1 40. Ke3 g5 41. Nf6 Re1+ 42. Kf2 Rc1 43. Rd5+ Kb6 44. Ke3 Re1+ 45. Kd2 Rh1 46. Ng4 h5 47. Nf2 Rxh2 48. Ke3 Rg2 49. e5 c3 50. bxc3 bxc3 51. Rd1 Nxe5 52. Ne4 c2 53. Rc1 Nc4+ 54. Kd3 Ne5+ 55. Ke3 Nc4+ 56. Kd3 Na3 57. Kc3 h4 58. Kb4 Nb5 59. Nxg5 Rxg5 60. Rxc2 Nd4 0-1

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1969.01.23"]
[Round "8"]
[White "Cortlever, Nicolaas"]
[Black "Krabbe, Tim"]
[Result "0-1"]
[ECO "B15"]
[PlyCount "84"]
[EventDate "1969.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 g6 4. Nf3 Bg7 5. Be3 Bg4 6. h3 Bxf3 7. Qxf3 e6 8. Qd1 Ne7 9. Qd2 dxe4 10. Nxe4 Nf5 11. 0-0-0 0-0 12. h4 Nxe3 13. fxe3 Nd7 14. g4 h6 15. Kb1 Qe7 16. h5 g5 17. Ng3 Rfd8 18. Bd3 c5 19. c3 Rab8 20. Qg2 b5 21. Bc2 b4 22. c4 Nb6 23. Qe4 Nxc4 24. Nf5 Qf6 25. Nxg7 Qxg7 26. Bb3 Nd6 27. Qd3 cxd4 28. Qxd4 Qxd4 29. Rxd4 Ne8 30. Rhd1 Rxd4 31. Rxd4 Nf6 32. Bd1 a5 33. Bf3 Rb5 34. Kc2 Kg7 35. Kb3 Rc5 36. Bd1 Re5 37. Ka4 Ne4 38. Rc4 Nc5+ 39. Kxa5 Nd3+ 40. Kb6 Nxb2 41. Rd4 Nxd1 42. Rxd1 Rxe3 0-1

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1969.01.21"]
[Round "7"]
[White "Westerinen, Heikki MJ"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "C63"]
[PlyCount "43"]
[EventDate "1969.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3 fxe4 5. Nxe4 d5 6. Nxe5 dxe4 7. Nxc6 Qg5 8. Qe2 Nf6 9. f4 Qxf4 10. Ne5+ c6 11. d4 Qh4+ 12. g3 Qh3 13. Bc4 Be6 14. Bf4 Bd6 15. 0-0-0 0-0-0 16. Kb1 Rhe8 17. Rde1 Re7 18. Rhf1 Bd5 19. Rc1 h6 20. Bxd5 Nxd5 21. c4 Nxf4 22. gxf4 1/2-1/2

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1969.01.20"]
[Round "6"]
[White "Cortlever, Nicolaas"]
[Black "Gaprindashvili, Nona"]
[Result "1-0"]
[ECO "B27"]
[PlyCount "83"]
[EventDate "1969.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 b6 3. d4 cxd4 4. Nxd4 Bb7 5. Nc3 a6 6. Bd3 g6 7. f4 d6 8. 0-0 Bg7 9. Nf3 Nf6 10. Qe2 0-0 11. Bd2 Nc6 12. a3 b5 13. Rac1 b4 14. Nd1 bxa3 15. bxa3 e5 16. fxe5 dxe5 17. Kh1 Ne8 18. Ne3 Nc7 19. c4 Ne6 20. Nd5 a5 21. Rb1 Rb8 22. Be3 Qd6 23. Qa2 Ba8 24. Rbc1 Nc5 25. Rcd1 Nd4 26. Nxd4 exd4 27. Bg5 Bxd5 28. Bf4 Be5 29. Bxe5 Qxe5 30. exd5 Rb3 31. Rde1 Qb8 32. Be4 Rb2 33. Qa1 d3 34. Bf3 d2 35. Rb1 Rxb1 36. Rxb1 Qf4 37. Qc3 Re8 38. g3 Re1+ 39. Kg2 Rxb1 40. gxf4 d1Q 41. Bxd1 Rxd1 42. Qe3 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1969.01.19"]
[Round "5"]
[White "Cortlever, Nicolaas"]
[Black "Kramer, Haije J"]
[Result "1/2-1/2"]
[ECO "B07"]
[PlyCount "50"]
[EventDate "1969.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. g3 Nf6 5. Bg2 c6 6. Nge2 0-0 7. 0-0 e5 8. h3 Nbd7 9. Be3 Re8 10. Qd2 b5 11. a3 Qc7 12. d5 Bb7 13. dxc6 Bxc6 14. Rfd1 Bf8 15. g4 Nc5 16. Ng3 Qb7 17. Nd5 Bxd5 18. exd5 Rac8 19. Bh6 Bxh6 20. Qxh6 Qe7 21. Qe3 Kg7 22. Qg5 Kf8 23. Qe3 Kg7 24. Rd2 h6 25. Re1 Qd7 1/2-1/2

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1969.01.17"]
[Round "4"]
[White "Bednarski, Jacek B"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "C80"]
[PlyCount "38"]
[EventDate "1969.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[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 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. Nxe5 Nxe5 9. dxe5 c6 10. Be3 Be7 11. Nd2 Nxd2 12. Qxd2 0-0 13. c3 f6 14. exf6 Bxf6 15. a4 Bf5 16. Rfe1 Qd7 17. Bd4 Be7 18. Qe3 Bd6 19. axb5 axb5 1/2-1/2

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1969.01.16"]
[Round "3"]
[White "Cortlever, Nicolaas"]
[Black "Hartoch, Robert G"]
[Result "1-0"]
[ECO "B06"]
[PlyCount "85"]
[EventDate "1969.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. g3 Nc6 5. d5 Nb8 6. Bg2 c5 7. f4 e6 8. Nge2 exd5 9. Nxd5 Nc6 10. 0-0 Nge7 11. Bd2 Nxd5 12. exd5 Ne7 13. Bc3 0-0 14. Qd2 Bg4 15. Bxg7 Kxg7 16. Nc3 Bf5 17. Rae1 Qd7 18. Rf3 Rae8 19. Rfe3 Ng8 20. Nd1 h5 21. Nf2 Rxe3 22. Qxe3 h4 23. Qc3+ Kh7 24. Bf3 Nh6 25. g4 Nxg4 26. Bxg4 Bxg4 27. Ne4 Qf5 28. Qf6 Bh3 29. Qxf5 Bxf5 30. Nxd6 Bxc2 31. Rc1 Bf5 32. Rxc5 b6 33. Rc6 Rd8 34. Nxf5 gxf5 35. d6 Kg7 36. Kg2 Kf6 37. d7+ Ke7 38. Rc7 Rg8+ 39. Kf3 a6 40. Rc8 Rd8 41. Rxd8 Kxd8 42. Kg2 Kxd7 43. Kh3 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1969.01.15"]
[Round "2"]
[White "Kurajica, Bojan"]
[Black "Cortlever, Nicolaas"]
[Result "1-0"]
[ECO "C81"]
[PlyCount "133"]
[EventDate "1969.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[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 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Qe2 Be7 10. Rd1 Nc5 11. Be3 Nxb3 12. axb3 0-0 13. c4 Nb4 14. Nc3 c5 15. cxd5 Nxd5 16. Qe1 b4 17. Nxd5 Bxd5 18. Rd3 Ra7 19. Rad1 Rd7 20. Qd2 Qc8 21. Bxc5 Qxc5 22. Rxd5 Rxd5 23. Qxd5 Qc2 24. h3 h6 25. e6 fxe6 26. Qxe6+ Kh8 27. Rf1 Bf6 28. Qd6 Rd8 29. Qxb4 Qxb2 30. Re1 a5 31. Qxa5 Qxb3 32. Ne5 Rd1 33. Qa8+ Kh7 34. Qe4+ Kg8 35. Ng6 Rxe1+ 36. Qxe1 Kf7 37. Nf4 Qc4 38. Qd2 Qd4 39. Qa2+ Ke7 40. Qe6+ Kd8 41. g3 Qe5 42. Qc6 Qe1+ 43. Kg2 Ke7 44. h4 Bd4 45. Qc7+ Ke8 46. Qc8+ Ke7 47. Qb7+ Ke8 48. Qa8+ Ke7 49. Qa3+ Kf7 50. Qf3 Bf6 51. Nd5 Qe5 52. h5 Kg8 53. Nxf6+ gxf6 54. Qg4+ Kf8 55. Qg6 Qd5+ 56. Kh2 Qg5 57. Qxg5 fxg5 58. Kh3 Ke7 59. f4 Kf6 60. Kg4 gxf4 61. gxf4 Ke6 62. Kg3 Kf6 63. Kf2 Ke6 64. Ke3 Kd5 65. Kd3 Ke6 66. Ke4 Kf6 67. f5 1-0

[Event "Hoogovens-B"]
[Site "Wijk aan Zee"]
[Date "1969.01.14"]
[Round "1"]
[White "Cortlever, Nicolaas"]
[Black "Ciocaltea, Victor"]
[Result "1/2-1/2"]
[ECO "B07"]
[PlyCount "50"]
[EventDate "1969.01.14"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 c6 4. g3 d6 5. Bg2 Nf6 6. Nge2 0-0 7. 0-0 Nbd7 8. h3 e5 9. Be3 Re8 10. Qd2 exd4 11. Bxd4 Qa5 12. Rad1 Ne5 13. Nd5 Qxd2 14. Nxf6+ Bxf6 15. Rxd2 Nc4 16. Rdd1 Be7 17. b3 Nb6 18. c4 Bf8 19. Rfe1 Nd7 20. Nc3 f6 21. Be3 Ne5 22. f4 Nf7 23. Bc1 Be6 24. Ne2 a6 25. Nd4 Bd7 1/2-1/2

[Event "Amsterdam AMRO op"]
[Site "Amsterdam"]
[Date "1969.??.??"]
[Round "?"]
[White "Van Scheltinga, Theo D"]
[Black "Cortlever, Nicolaas"]
[Result "1-0"]
[ECO "D78"]
[PlyCount "69"]
[EventDate "1969.??.??"]
[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 c6 2. Nf3 Nf6 3. b3 g6 4. Bb2 d5 5. g3 Bg7 6. Bg2 0-0 7. 0-0 Bg4 8. d4 Nbd7 9. Nc3 Bxf3 10. Bxf3 e6 11. Bg2 Qa5 12. Qc2 b5 13. c5 e5 14. dxe5 Ng4 15. h3 Nh6 16. e4 Nxc5 17. exd5 b4 18. Ne4 Nxe4 19. Qxe4 cxd5 20. Qxd5 Qxd5 21. Bxd5 Rad8 22. Rad1 Nf5 23. Rfe1 Rd7 24. Bc4 Rc7 25. Kg2 a5 26. Rd5 a4 27. Red1 a3 28. Bc1 Rfc8 29. Rd8+ Bf8 30. e6 Kg7 31. Bf4 Rxc4 32. bxc4 Rxc4 33. R1d7 Be7 34. Be5+ f6 35. Bd6 1-0

[Event "Hoogovens M-4K"]
[Site "Wijk aan Zee"]
[Date "1968.01.14"]
[Round "3"]
[White "Kramer, Haije J"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "D25"]
[PlyCount "37"]
[EventDate "1968.01.12"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 g6 5. Bxc4 Bg7 6. Nc3 0-0 7. h3 Nc6 8. e4 Nd7 9. Be3 a6 10. 0-0 b5 11. Be2 Nb6 12. d5 Na5 13. Bd4 f6 14. Bd3 Nac4 15. Qe2 Nd6 16. Rac1 Bd7 17. Rfd1 c6 18. dxc6 Bxc6 19. Bc5 1/2-1/2

[Event "Hoogovens M-4K"]
[Site "Wijk aan Zee"]
[Date "1968.01.13"]
[Round "2"]
[White "Cortlever, Nicolaas"]
[Black "Van der Griendt, B."]
[Result "1-0"]
[ECO "C62"]
[PlyCount "157"]
[EventDate "1968.01.12"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 d6 5. Bb5 Bd7 6. Bg5 h6 7. Bh4 Be7 8. Bg3 a6 9. Bxc6 Bxc6 10. Qd3 exd4 11. Nxd4 Nh5 12. Nf5 Bf6 13. 0-0-0 Nxg3 14. hxg3 g6 15. Ne3 Qd7 16. Ned5 Bg7 17. Qe3 Bxd5 18. Rxd5 Bxc3 19. Qxc3 0-0-0 20. Qe3 h5 21. Rhd1 Qa4 22. a3 Rhe8 23. Qa7 Qc6 24. e5 Re6 25. f4 Rde8 26. Kb1 f6 27. exd6 Rxd6 28. Rxd6 cxd6 29. Qd4 Re2 30. Qd3 Rxg2 31. Qxg6 Kb8 32. Qd3 Qc5 33. Rc1 Ka7 34. Re1 d5 35. b4 Qf2 36. Qe3+ d4 37. Qxf2 Rxf2 38. Rh1 Rf3 39. Kb2 d3 40. cxd3 Rxd3 41. Rxh5 Rxg3 42. Rf5 Rg6 43. Kc3 Kb6 44. Kd4 Kc6 45. Ke4 Rh6 46. Rc5+ Kd6 47. Kf5 b6 48. Rc3 a5 49. bxa5 bxa5 50. Rb3 Kc5 51. a4 Kc4 52. Rb1 Kc5 53. Rb5+ Kc6 54. Ke4 Rh1 55. Rxa5 Kb6 56. Rb5+ Kc6 57. Rf5 Re1+ 58. Kf3 Re6 59. Kg4 Kd6 60. Ra5 Re4 61. Kf5 Rb4 62. Ra7 Rc4 63. a5 Ra4 64. a6 Kc5 65. Rc7+ Kb6 66. Rf7 Kxa6 67. Rxf6+ Kb7 68. Rd6 Kc7 69. Rd1 Ra2 70. Kf6 Rf2 71. f5 Kc6 72. Ke6 Re2+ 73. Kf7 Rf2 74. f6 Kc7 75. Ke7 Re2+ 76. Kf8 Rf2 77. f7 Rf3 78. Rg1 Kd8 79. Kg7 1-0

[Event "Hoogovens M-4K"]
[Site "Wijk aan Zee"]
[Date "1968.01.12"]
[Round "1"]
[White "Cortlever, Nicolaas"]
[Black "Van der Weide, Piet"]
[Result "1-0"]
[ECO "B33"]
[PlyCount "91"]
[EventDate "1968.01.12"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Qb6 5. Nb3 Nf6 6. Nc3 e6 7. Be3 Qc7 8. f4 d6 9. Bd3 a6 10. a4 b6 11. 0-0 Be7 12. Qf3 Rb8 13. h3 0-0 14. Rae1 Nb4 15. Nc1 Nxd3 16. Nxd3 b5 17. e5 dxe5 18. fxe5 Nd5 19. Nxd5 exd5 20. Qg3 bxa4 21. Rf2 Kh8 22. Ref1 Be6 23. Nf4 Bc5 24. Bxc5 Qxc5 25. Kh2 Bf5 26. Nh5 Bg6 27. Nf4 Be4 28. e6 f6 29. c3 Rb3 30. Re1 a3 31. Nh5 Qe7 32. bxa3 Rxa3 33. Rb2 g6 34. Nf4 Rc8 35. Re3 g5 36. Nh5 Qxe6 37. Rb8 Ra2 38. Nxf6 Qxf6 39. Rxc8+ Kg7 40. Qc7+ Kg6 41. Rg8+ Kh6 42. Rg3 Bg6 43. Rf3 Qxf3 44. Qg7+ Kh5 45. Qxg6+ hxg6 46. Rh8# 1-0

[Event "EU-chT 04th Group1"]
[Site "Barcelona"]
[Date "1967.09.16"]
[Round "2"]
[White "Cortlever, Nicolaas"]
[Black "Visier Segovia, Fernando"]
[Result "1/2-1/2"]
[ECO "B36"]
[PlyCount "140"]
[EventDate "1967.09.15"]
[EventType "team-tourn"]
[EventRounds "3"]
[EventCountry "ESP"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Netherlands"]
[BlackTeam "Spain"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "ESP"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Nf6 6. Nc3 Nxd4 7. Qxd4 d6 8. Be2 Bg7 9. Be3 0-0 10. Qd2 Ng4 11. Bxg4 Bxg4 12. 0-0 Be6 13. b3 Qa5 14. Bd4 Bxd4 15. Qxd4 Rac8 16. f4 Qc5 17. Qxc5 Rxc5 18. h3 a6 19. a4 f6 20. Rad1 Rfc8 21. Rd2 R8c6 22. Rf3 h6 23. g4 g5 24. e5 dxe5 25. f5 Bf7 26. Ne4 Ra5 27. Nc3 h5 28. Re3 Rac5 29. Ne4 Ra5 30. Rd7 b5 31. Nc3 b4 32. Ne4 hxg4 33. hxg4 Bxc4 34. bxc4 Rxc4 35. Rxe7 Rxa4 36. Rd3 Ra1+ 37. Kf2 Ra2+ 38. Ke3 Ra3 39. Nxf6+ Kf8 40. Rxa3 bxa3 41. Rd7 Rc3+ 42. Ke4 Rc4+ 43. Kxe5 Rc5+ 44. Ke4 Rc4+ 45. Ke5 Rc5+ 46. Kd6 a2 47. Nh7+ Kg8 48. f6 Rc8 49. Nxg5 Rf8 50. Rg7+ Kh8 51. Rh7+ Kg8 52. Rg7+ Kh8 53. Rh7+ Kg8 54. Rh1 Rxf6+ 55. Ke5 Rb6 56. Ra1 Rb5+ 57. Kf4 Rb4+ 58. Ne4 Ra4 59. Kf5 Kg7 60. Nc3 Ra3 61. Ne2 Ra5+ 62. Kf4 Kg6 63. Ng1 Ra3 64. Nh3 Rxh3 65. Rxa2 Rb3 66. Rxa6+ Kg7 67. Kg5 Rb5+ 68. Kh4 Rb4 69. Kh5 Rb5+ 70. g5 Rb7 1/2-1/2

[Event "EU-chT 04th Group1"]
[Site "Barcelona"]
[Date "1967.09.15"]
[Round "1"]
[White "Schumacher, Helmut"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[ECO "D00"]
[PlyCount "125"]
[EventDate "1967.09.15"]
[EventType "team-tourn"]
[EventRounds "3"]
[EventCountry "ESP"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]
[WhiteTeam "Belgium"]
[BlackTeam "Netherlands"]
[WhiteTeamCountry "BEL"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. Bg5 g6 3. Nd2 d5 4. e3 Bg7 5. Bd3 c6 6. c3 Bf5 7. Bxf5 gxf5 8. Bxf6 Bxf6 9. Nh3 Nd7 10. Nf4 e6 11. Qh5 Qe7 12. Nd3 0-0-0 13. f4 Rdg8 14. g3 Rg4 15. Nf2 Rg6 16. 0-0-0 Bg7 17. Qe2 h5 18. Nf3 Bf6 19. Rhg1 Rhg8 20. Nd3 h4 21. gxh4 Bxh4 22. Rxg6 Rxg6 23. Nde5 Nxe5 24. Nxe5 Rg7 25. Qh5 Bf6 26. Nf3 Qd8 27. Rg1 Rxg1+ 28. Nxg1 Qg8 29. Ne2 Kd7 30. Kd2 Ke7 31. Qh3 Qg4 32. Qf1 Bh4 33. Ng1 Kf8 34. Nf3 Be7 35. Ne5 Qh5 36. Qg2 Bd6 37. Nf3 Qg4 38. Qf2 f6 39. Qg3 Kf7 40. Ke1 c5 41. Kf2 b5 42. h3 Qxg3+ 43. Kxg3 c4 44. Kf2 a5 45. Ke2 Bf8 46. Kd2 Ke7 47. Kc2 Kd6 48. b3 Ke7 49. Nh4 Kf7 50. Nf3 Ba3 51. Nd2 Kg6 52. Nb1 cxb3+ 53. axb3 Bd6 54. Nd2 e5 55. fxe5 fxe5 56. dxe5 Bxe5 57. b4 axb4 58. cxb4 Bd6 59. Kc3 Be5+ 60. Kd3 Bd6 61. Nf3 Bxb4 62. Nd4 Bc5 63. Nxb5 1/2-1/2

[Event "Hoogovens M-4K"]
[Site "Beverwijk"]
[Date "1967.01.15"]
[Round "3"]
[White "Cortlever, Nicolaas"]
[Black "Bakker, Piet"]
[Result "1-0"]
[ECO "B16"]
[PlyCount "123"]
[EventDate "1967.01.13"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. g3 Bf5 7. Bg2 e6 8. Be3 Nd7 9. Ne2 Nb6 10. c3 Nd5 11. Bd2 Qb6 12. Qb3 Qxb3 13. axb3 Bd3 14. Nf4 Nxf4 15. Bxf4 Bg7 16. Kd2 Bg6 17. Ra5 0-0 18. h4 h6 19. Rha1 a6 20. Bc7 Rac8 21. Bb6 Rfe8 22. Re1 Bf8 23. b4 Re7 24. f4 Rd7 25. Bc5 Bg7 26. Bb6 Bf8 27. Bf3 Bd6 28. Ke3 Bc2 29. Kf2 f5 30. Ra3 Kg7 31. Ke3 Kf6 32. Rc1 Be4 33. Bxe4 fxe4 34. Kxe4 Rg8 35. Kf3 Bb8 36. Ra5 Rd5 37. c4 Rxa5 38. bxa5 h5 39. Rd1 Ke7 40. Bc5+ Bd6 41. Bxd6+ Kxd6 42. b4 f6 43. Rg1 Rg4 44. Rb1 Rg8 45. Rb3 f5 46. Re3 Rd8 47. Ke2 Ke7 48. Kd3 Kf6 49. Kc3 Kf7 50. Re5 Kf6 51. d5 exd5 52. cxd5 cxd5 53. Kd4 Rg8 54. Rxd5 Ke6 55. Re5+ Kf6 56. Re3 Rc8 57. Kd5 Rd8+ 58. Kc5 Rd7 59. Kb6 Kf7 60. Rc3 Ke6 61. Rc7 Rd4 62. Rxb7 1-0

[Event "Hoogovens M-4K"]
[Site "Beverwijk"]
[Date "1967.01.14"]
[Round "2"]
[White "Henneberke, Frans"]
[Black "Cortlever, Nicolaas"]
[Result "0-1"]
[ECO "D90"]
[PlyCount "124"]
[EventDate "1967.01.13"]
[EventType "tourn"]
[EventRounds "3"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nf3 Nf6 5. Nc3 g6 6. Bf4 Nc6 7. e3 Bg7 8. Be2 0-0 9. 0-0 Bg4 10. Rc1 Qd7 11. Qb3 Bxf3 12. Bxf3 e6 13. Na4 b6 14. Nc3 Na5 15. Qb5 a6 16. Qxd7 Nxd7 17. b3 Rfc8 18. Ne2 Bf8 19. Rxc8 Rxc8 20. Rc1 Rc6 21. Rxc6 Nxc6 22. Nc1 Ba3 23. Nd3 Kf8 24. Bc7 Ke7 25. Ne5 Ndxe5 26. Bxe5 Nb4 27. Bc7 b5 28. e4 dxe4 29. Bxe4 Nxa2 30. Bb7 Kd7 31. Bb6 Nc1 32. d5 Nxb3 33. dxe6+ fxe6 34. Bxa6 Kc6 35. Be3 Bc5 36. Bg5 Bd4 37. Be7 Bc5 38. Bg5 Nd4 39. Kf1 Kb6 40. Bc8 Kc7 41. Ba6 b4 42. Bd3 Kd6 43. Ke1 e5 44. f4 Ne6 45. fxe5+ Kxe5 46. Bd2 b3 47. h4 Bd4 48. h5 Nc5 49. Bb1 gxh5 50. Bxh7 Ne4 51. Kd1 b2 52. Bxe4 Kxe4 53. Kc2 Kf5 54. Bb4 Kf4 55. Be1 Ke3 56. Bg3 Ke2 57. Bd6 Kf2 58. g3 Kf3 59. Bc7 Ke4 60. Bd8 Be5 61. Be7 Kf3 62. Bh4 Kg4 0-1

