[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.08"]
[Round "1"]
[White "Darga, Klaus"]
[Black "Bobotsov, Milko"]
[Result "1-0"]
[ECO "E94"]
[EventDate "1964.01.08"]
[PlyCount "139"]

1. c4 c5 2. Nc3 Nc6 3. Nf3 g6 4. e3 Bg7 5. d4 d6 6. Be2 Nf6 7. O-O O-O 8. d5 Nb8 9. e4 e5 10. dxe6 fxe6 11. e5 dxe5 12. Qxd8 Rxd8 13. Nxe5 Nd5 14. cxd5 Bxe5 15. Bg5 Re8 16. Bc4 a6 17. a4 Nd7 18. Rfe1 Nb6 19. Rxe5 Nxc4 20. Re2 Bd7 21. Rae1 exd5 22. Nxd5 Rxe2 23. Rxe2 Bc6 24. Ne7+ Kf8 25. Nxc6 bxc6 26. Be7+ Kf7 27. Bxc5 Re8 28. Rxe8 Kxe8 29. Bd4 Kd7 30. Kf1 c5 31. Bc3 Kc6 32. Ke2 Nb6 33. a5 Nc8 34. Ke3 Kd5 35. Kf4 Nd6 36. f3 Nf7 37. h4 Ke6 38. g4 Kd6 39. Ke4 Ke6 40. b4 Nd6+ 41. Kf4 c4 42. Bb2 Nb5 43. Ke4 c3 44. Ba1 c2 45. Bb2 Nc3+ 46. Kd3 Na2 47. Kxc2 Nxb4+ 48. Kd2 Kd5 49. Bc3 Nc6 50. Ke3 Kc4 51. Bd2 Kd5 52. Be1 Ke5 53. Bc3+ Kd5 54. Kf4 Kc4 55. Bf6 Kd5 56. Kg5 Nxa5 57. Kh6 Ke6 58. g5 Kf7 59. Kxh7 Nc6 60. f4 a5 61. f5 gxf5 62. Bd4 Ne7 63. h5 f4 64. g6+ Ke6 65. Bc5 f3 66. g7 f2 67. Bxf2 Kf7 68. Bh4 Ng8 69. Bg5 a4 70. Bc1 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.08"]
[Round "1"]
[White "Donner, Jan"]
[Black "Dunkelblum, Arthur"]
[Result "1-0"]
[ECO "E57"]
[EventDate "1964.01.08"]
[PlyCount "43"]

1. c4 c5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 e6 5. d4 d5 6. a3 cxd4 7. exd4 dxc4 8. Bxc4 Be7 9. O-O O-O 10. Re1 b6 11. Qd3 Bb7 12. Bg5 h6 13. Bf4 Re8 14. Rad1 Rc8 15. Ba2 Nb8 16. Ne5 Bf8 17. Bb1 Ba6 18. Qc2 g5 19. Nxf7 Kxf7 20. Qg6+ Ke7 21. Be5 Nbd7 22. Nd5+ 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.08"]
[Round "1"]
[White "Filip, Miroslav"]
[Black "Portisch, Lajos"]
[Result "0-1"]
[ECO "E05"]
[EventDate "1964.01.08"]
[PlyCount "58"]

1. c4 Nf6 2. g3 e6 3. Bg2 d5 4. Nf3 Be7 5. O-O O-O 6. d4 dxc4 7. Ne5 c5 8. dxc5 Qc7 9. c6 Nxc6 10. Nxc6 bxc6 11. Qa4 Nd5 12. Qxc4 Rb8 13. Nd2 Rb4 14. Qc2 Ba6 15. a3 Rb7 16. Re1 Rfb8 17. Ne4 c5 18. Rb1 h6 19. Bd2 Rb3 20. Nc3 Nf6 21. Bf4 Bd6 22. Bxd6 Qxd6 23. Red1 Qc7 24. Na4 c4 25. Rd4 e5 26. Rd2 e4 27. e3 c3 28. Bf1 Bxf1 29. Rxf1 Rxb2 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.08"]
[Round "1"]
[White "Ivkov, Borislav"]
[Black "De Rooi, Paul"]
[Result "1-0"]
[ECO "D37"]
[EventDate "1964.01.08"]
[PlyCount "91"]

1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Qa5 8. a3 dxc4 9. Bxc4 Qxc5 10. Qe2 Nc6 11. O-O Nh5 12. Bg5 Bxg5 13. Ne4 Qe7 14. Nfxg5 Nf6 15. Rfd1 Nxe4 16. Nxe4 e5 17. Nd6 Rb8 18. Rd2 Be6 19. Rad1 Bxc4 20. Qxc4 Rfd8 21. b4 g6 22. h4 h5 23. b5 Na5 24. Qc3 b6 25. Rd5 Qxh4 26. Qxe5 Qg4 27. Nf5 Qxd1+ 28. Rxd1 Rxd1+ 29. Kh2 gxf5 30. Qxb8+ Kg7 31. Qxa7 Rd6 32. Qc7 Re6 33. Qd8 Rf6 34. Qd5 Kg6 35. Kg3 Re6 36. Kf3 Rf6 37. Kf4 Kg7 38. Kg5 Rg6+ 39. Kxh5 Rh6+ 40. Kg5 f6+ 41. Kf4 Rh4+ 42. Kg3 Rg4+ 43. Kf3 Nc4 44. Qxf5 Rg5 45. Qd7+ Kh6 46. Qe7 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.08"]
[Round "1"]
[White "Keres, Paul"]
[Black "Zuidema, Coenraad"]
[Result "1-0"]
[ECO "C97"]
[EventDate "1964.01.08"]
[PlyCount "63"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Bd7 13. Nf1 Rfe8 14. b3 g6 15. Bg5 Kg7 16. Ne3 Be6 17. Qd2 Ng8 18. Bxe7 Qxe7 19. dxe5 dxe5 20. Nxe5 Bxh3 21. f4 Be6 22. c4 Qd8 23. Nd5 f6 24. Nd3 bxc4 25. Nxc5 Rc8 26. b4 Nc6 27. Ba4 Bxd5 28. exd5 c3 29. Rxe8 cxd2 30. Ne6+ Kf7 31. Nxd8+ Nxd8 32. Rd1 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.08"]
[Round "1"]
[White "Nei, Iivo"]
[Black "Van Scheltinga, Theodore"]
[Result "1-0"]
[ECO "E07"]
[EventDate "1964.01.08"]
[PlyCount "139"]

1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O O-O 6. d4 Nbd7 7. Nc3 dxc4 8. a4 a6 9. Nd2 e5 10. Nxc4 exd4 11. Qxd4 Nc5 12. Qxd8 Rxd8 13. Bg5 Nb3 14. Rad1 Be6 15. Ne3 c6 16. Ne4 Nd4 17. Rfe1 Bb3 18. Ra1 Nxe4 19. Bxe7 Re8 20. Bxe4 Rxe7 21. Bd3 a5 22. Ra3 Rd8 23. Kg2 g6 24. Rc1 b6 25. Rc3 Be6 26. Ra1 Nb3 27. Ra3 Nc5 28. Bc4 Bxc4 29. Rxc4 Rd2 30. b4 axb4 31. Rxb4 Nd7 32. Kf1 c5 33. Rb5 Re4 34. a5 bxa5 35. Raxa5 Rb4 36. Rxb4 cxb4 37. Rb5 Rb2 38. Kg2 Rb1 39. Nc4 Nf8 40. Na5 Rb2 41. e3 Ne6 42. Nc6 b3 43. Na5 Kg7 44. Rxb3 Rxb3 45. Nxb3 f5 46. Nd4 Nc5 47. f3 Kf6 48. Kf2 g5 49. Ke2 g4 50. Nc2 Nd7 51. Ne1 Ne5 52. fxg4 Nxg4 53. h3 Ne5 54. Nd3 Nc4 55. Kf3 Nb6 56. g4 fxg4+ 57. Kxg4 Nc4 58. Kf4 Nd2 59. e4 Nb3 60. e5+ Ke6 61. h4 Kd5 62. Kf5 Nd4+ 63. Kf6 Ke4 64. Nc5+ Kd5 65. e6 Nc6 66. Nb7 Ke4 67. h5 h6 68. Nd8 Nb4 69. Kg6 Nd5 70. Kxh6 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.08"]
[Round "1"]
[White "Parma, Bruno"]
[Black "Lengyel, Levente"]
[Result "1-0"]
[ECO "C98"]
[EventDate "1964.01.08"]
[PlyCount "79"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Nc6 12. dxc5 dxc5 13. Nbd2 Qc7 14. Nf1 Rd8 15. Qe2 Rb8 16. Ne3 g6 17. Nh2 Be6 18. Nhg4 Rd6 19. Qf3 Nxg4 20. Nxg4 Bxg4 21. hxg4 c4 22. Be3 Rbd8 23. Rad1 Rxd1 24. Rxd1 Rxd1+ 25. Qxd1 Nd8 26. Qd5 Qd6 27. a4 Qxd5 28. exd5 Nb7 29. axb5 axb5 30. Kf1 Bc5 31. Ke2 Bxe3 32. Kxe3 Nc5 33. d6 Kf8 34. Be4 Na4 35. Bc6 f5 36. gxf5 gxf5 37. f4 e4 38. Bxb5 Nb6 39. Kd4 Kf7 40. Kc5 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.08"]
[Round "1"]
[White "Van den Berg, Carel"]
[Black "Larsen, Bent"]
[Result "0-1"]
[ECO "E41"]
[EventDate "1964.01.08"]
[PlyCount "54"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 d5 6. Nf3 dxc4 7. Bxc4 a6 8. O-O b5 9. Bd3 Bb7 10. a4 bxa4 11. Nxa4 Nbd7 12. Qe2 O-O 13. dxc5 Ne4 14. Rd1 Qc7 15. Bd2 Nxd2 16. Nxd2 Nxc5 17. Rdc1 Qe5 18. Nxc5 Bxc5 19. Ra5 Rac8 20. Nf1 Qd5 21. Qf3 Qxf3 22. gxf3 Bb4 23. Raa1 a5 24. Be4 Ba6 25. Rxc8 Rxc8 26. Rd1 f5 27. Bb1 Be2 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.09"]
[Round "2"]
[White "Bobotsov, Milko"]
[Black "Keres, Paul"]
[Result "0-1"]
[ECO "D94"]
[EventDate "1964.01.08"]
[PlyCount "76"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Bd2 c6 7. Be2 dxc4 8. Bxc4 Bg4 9. O-O Nbd7 10. Be2 Bxf3 11. Bxf3 e5 12. Qb3 exd4 13. exd4 Nb6 14. Be3 Qd7 15. Rfd1 Rfd8 16. d5 Nbxd5 17. Bg5 Qf5 18. Bxf6 Bxf6 19. Nxd5 cxd5 20. Bxd5 Rd7 21. Rd2 Re8 22. g3 Bg5 23. f4 Bd8 24. Rad1 Ba5 25. Rd3 Re2 26. Bf3 Bb6+ 27. Qxb6 Rxd3 28. Qd8+ Rxd8 29. Rxd8+ Kg7 30. Bxe2 Qe6 31. Kf1 Qxa2 32. Rd2 Qa5 33. Ke1 Qc5 34. Bf1 a5 35. Ke2 b5 36. Kd1 a4 37. Bd3 b4 38. Bb1 Qg1+ 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.09"]
[Round "2"]
[White "De Rooi, Paul"]
[Black "Filip, Miroslav"]
[Result "0-1"]
[ECO "B42"]
[EventDate "1964.01.08"]
[PlyCount "78"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. O-O Qc7 7. Re1 Bc5 8. Be3 d6 9. Nc3 O-O 10. Nb3 Bxe3 11. Rxe3 e5 12. Be2 Be6 13. Qd2 Nc6 14. Rf1 Rfd8 15. Rg3 Ne7 16. f4 exf4 17. Qxf4 Ng6 18. Qf2 b5 19. h4 b4 20. h5 bxc3 21. Rxc3 Qe7 22. hxg6 Nxe4 23. gxf7+ Kh8 24. Qe3 Nxc3 25. bxc3 Qd7 26. Bxa6 Bxf7 27. Bd3 Rxa2 28. Qe4 Bg8 29. Nd4 Ra5 30. Nc6 Re8 31. Qf3 Rg5 32. Nb4 Qa7+ 33. Qf2 Qc7 34. Qd2 Qc5+ 35. Rf2 Rf8 36. Kf1 Rxf2+ 37. Qxf2 Qxc3 38. Qh4 Qa1+ 39. Ke2 Qe5+ 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.09"]
[Round "2"]
[White "Larsen, Bent"]
[Black "Dunkelblum, Arthur"]
[Result "1-0"]
[ECO "A03"]
[EventDate "1964.01.08"]
[PlyCount "69"]

1. f4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 d5 5. c3 O-O 6. d3 c5 7. a4 Nc6 8. Na3 d4 9. Qc2 Be6 10. O-O Rc8 11. Ng5 Bf5 12. Nc4 Nd5 13. Bd2 Qd7 14. Qb3 h6 15. Ne4 Nd8 16. Ne5 Bxe5 17. fxe5 Kg7 18. Nxc5 Rxc5 19. cxd4 Be6 20. dxc5 Nf4 21. Qb5 Nxe2+ 22. Kh1 Nc6 23. Bc3 a6 24. Qb6 Nxc3 25. bxc3 Qxd3 26. Rad1 Qxc3 27. Qxb7 Nxe5 28. Qxe7 Ng4 29. Qd6 Qe3 30. Qd4+ Kg8 31. h3 Qxd4 32. Rxd4 Ne3 33. Rc1 Rb8 34. c6 Rb2 35. Re4 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.09"]
[Round "2"]
[White "Lengyel, Levente"]
[Black "Darga, Klaus"]
[Result "1/2-1/2"]
[ECO "A34"]
[EventDate "1964.01.08"]
[PlyCount "74"]

1. Nf3 Nf6 2. c4 c5 3. g3 Nc6 4. Bg2 d5 5. cxd5 Nxd5 6. Nc3 Nc7 7. O-O e5 8. d3 Be7 9. Nd2 Be6 10. Bxc6+ bxc6 11. Qa4 Qd7 12. Nb3 Nb5 13. Ne4 Nd4 14. Nxd4 cxd4 15. b3 O-O 16. Ba3 Bd5 17. Bxe7 Qxe7 18. Nd2 f5 19. Rae1 f4 20. Ne4 a5 21. f3 fxg3 22. hxg3 Qb4 23. Rc1 Qxa4 24. bxa4 Rab8 25. Rc2 Bxe4 26. dxe4 Rb4 27. Rxc6 Rxa4 28. Rb1 Rb4 29. Rxb4 axb4 30. Rb6 d3 31. Kf2 dxe2 32. Kxe2 Ra8 33. Rxb4 Rxa2+ 34. Ke3 Ra3+ 35. Kf2 Kf7 36. Rb7+ Kf6 37. Rb6+ Kf7 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.09"]
[Round "2"]
[White "Portisch, Lajos"]
[Black "Donner, Jan"]
[Result "1-0"]
[ECO "E54"]
[EventDate "1964.01.08"]
[PlyCount "91"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 O-O 6. Bd3 d5 7. O-O dxc4 8. Bxc4 b6 9. a3 cxd4 10. axb4 dxc3 11. Qxd8 Rxd8 12. bxc3 Bb7 13. Be2 Nc6 14. Bb2 a5 15. b5 Nb8 16. Rfd1 Nbd7 17. c4 Nc5 18. Ne5 Nfe4 19. f3 Nd2 20. Nc6 Rd7 21. Nd4 e5 22. Rxd2 exd4 23. Rxd4 Re7 24. Ra3 Re6 25. Kf2 f6 26. Rd1 Rc8 27. Bd4 Rc7 28. Bxc5 Rxc5 29. Rad3 Bc8 30. Rd5 Rc7 31. c5 bxc5 32. Rd8+ Kf7 33. Bc4 Ke7 34. Bxe6 Bxe6 35. Ra8 Rb7 36. Rxa5 Bb3 37. Rda1 Kd6 38. Ke1 Kd5 39. Rc1 c4 40. Kd2 Kc5 41. Kc3 Rd7 42. b6+ Kxb6 43. Rca1 Rd3+ 44. Kb4 Rxe3 45. Ra7 Kc6 46. Rxg7 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.09"]
[Round "2"]
[White "Van Scheltinga, Theodore"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[ECO "E64"]
[EventDate "1964.01.08"]
[PlyCount "82"]

1. d4 Nf6 2. c4 c5 3. d5 d6 4. Nc3 g6 5. Nf3 Bg7 6. g3 O-O 7. Bg2 Na6 8. O-O Nc7 9. Re1 a6 10. a4 Rb8 11. e4 b5 12. axb5 axb5 13. e5 Ng4 14. exd6 exd6 15. h3 Nf6 16. Nd2 Bd7 17. Ra7 Re8 18. Nde4 Nxe4 19. Nxe4 Bf5 20. Bg5 f6 21. Nxf6+ Bxf6 22. Bxf6 Qxf6 23. Rxc7 bxc4 24. Rxe8+ Rxe8 25. Qa4 Rf8 26. Qxc4 Rf7 27. Rxf7 Kxf7 28. Qc3 g5 29. Qxf6+ Kxf6 30. f4 gxf4 31. gxf4 Bc8 32. Kf2 h6 33. Ke3 Bf5 34. h4 Bc8 35. Be4 Ba6 36. Bh7 Bf1 37. Be4 Ba6 38. Kf3 Bc8 39. Kg3 Bd7 40. Kf3 Bc8 41. Kg3 Bd7 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.09"]
[Round "2"]
[White "Van den Berg, Carel"]
[Black "Parma, Bruno"]
[Result "0-1"]
[ECO "E59"]
[EventDate "1964.01.08"]
[PlyCount "66"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O Nc6 8. a3 Bxc3 9. bxc3 Qc7 10. Nd2 dxc4 11. Nxc4 e5 12. Bb2 Be6 13. Nxe5 Nxe5 14. dxe5 Qxe5 15. Re1 c4 16. Bf1 Rad8 17. Qe2 Rd3 18. f3 Rfd8 19. Qf2 Rd2 20. Re2 Rxe2 21. Qxe2 Qc5 22. Kh1 b5 23. e4 a5 24. Rd1 Rd7 25. Rd4 b4 26. axb4 axb4 27. e5 bxc3 28. Rxd7 Nxd7 29. Bxc3 Nb6 30. Qd2 Nd5 31. f4 g6 32. Bd4 c3 33. Qd3 Qc6 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.09"]
[Round "2"]
[White "Zuidema, Coenraad"]
[Black "Nei, Iivo"]
[Result "0-1"]
[ECO "C89"]
[EventDate "1964.01.08"]
[PlyCount "58"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d4 Bd6 13. Re1 Qh4 14. g3 Qh3 15. Be3 Bg4 16. Qd3 Rae8 17. Nd2 Re6 18. Bxd5 cxd5 19. Qf1 Qh5 20. f4 Rfe8 21. Qf2 Qf5 22. Nf1 h5 23. Rac1 h4 24. Qc2 Re4 25. a4 Bh3 26. axb5 axb5 27. Qd3 Bxf1 28. Rxf1 hxg3 29. hxg3 Qg4 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.10"]
[Round "3"]
[White "Darga, Klaus"]
[Black "Van den Berg, Carel"]
[Result "1/2-1/2"]
[ECO "E63"]
[EventDate "1964.01.08"]
[PlyCount "112"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. d4 Nc6 7. Nc3 a6 8. h3 Rb8 9. e4 b5 10. e5 dxe5 11. dxe5 Qxd1 12. Rxd1 Nd7 13. cxb5 axb5 14. Be3 Nb6 15. Bf4 e6 16. Rac1 Bb7 17. Ne4 Nb4 18. Nf6+ Bxf6 19. exf6 N4d5 20. Bxc7 Nxc7 21. Rxc7 Nd5 22. Rc5 Nxf6 23. Rd4 Bd5 24. Ne5 Rfc8 25. Nc6 Kg7 26. Rcxd5 Rxc6 27. Rd6 Rc1+ 28. Rd1 Rbc8 29. b4 Nd5 30. Rxc1 Rxc1+ 31. Bf1 Nxb4 32. a3 Nd5 33. Kg2 Ra1 34. Bxb5 Rxa3 35. Bc4 Nf6 36. Rb6 Rc3 37. Bb3 Rc7 38. h4 h6 39. Bd1 Rd7 40. Bf3 e5 41. Kf1 Ra7 42. Rb5 Ra1+ 43. Kg2 e4 44. Be2 Rc1 45. Rb2 h5 46. Ra2 Nd5 47. Ra5 Nc7 48. Ra4 f5 49. Bc4 Kf6 50. Rb4 Rc2 51. Rb6+ Ke7 52. Bb3 Rb2 53. Kf1 Ne8 54. Re6+ Kf7 55. Bc4 Rb1+ 56. Kg2 Rb4 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.10"]
[Round "3"]
[White "Donner, Jan"]
[Black "De Rooi, Paul"]
[Result "1/2-1/2"]
[ECO "A43"]
[EventDate "1964.01.08"]
[PlyCount "105"]

1. d4 e6 2. c4 c5 3. d5 exd5 4. cxd5 d6 5. Nc3 g6 6. Nf3 Bg7 7. e4 a6 8. a4 Bg4 9. Be2 Nd7 10. Nd2 Bxe2 11. Qxe2 Ne7 12. O-O O-O 13. Nc4 Ne5 14. Ne3 f5 15. f4 Nd7 16. exf5 gxf5 17. Nc4 Rf6 18. Qd3 Rg6 19. Bd2 Qf8 20. Rae1 Bd4+ 21. Be3 Qg7 22. Kh1 Rf8 23. Bf2 Rf7 24. Re2 Bxf2 25. Rfxf2 Qd4 26. Rf3 Kf8 27. g3 Nc8 28. Re6 Ndb6 29. Nxb6 Nxb6 30. Qxd4 cxd4 31. Ne2 Nxd5 32. Nxd4 Rc7 33. Re2 Rc1+ 34. Kg2 Rc4 35. Rd2 Rxa4 36. Nxf5 Nxf4+ 37. Kf1 Rf6 38. Nxd6 Ra1+ 39. Kf2 Nh3+ 40. Kg2 Rg1+ 41. Kxh3 Rxf3 42. Nxb7 Ra1 43. Nc5 Ra2 44. Kg4 Rf1 45. h4 Rc1 46. Rf2+ Ke7 47. Re2+ Kd6 48. Ne4+ Kc6 49. Nf6 Rb1 50. Re6+ Kc5 51. Nxh7 Rbxb2 52. Ng5 Rc2 53. Rg6 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.10"]
[Round "3"]
[White "Dunkelblum, Arthur"]
[Black "Portisch, Lajos"]
[Result "0-1"]
[ECO "D11"]
[EventDate "1964.01.08"]
[PlyCount "96"]

1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. b3 Bg4 5. O-O Nbd7 6. Bb2 e6 7. c4 Bd6 8. d4 O-O 9. Ne5 Bf5 10. Nxd7 Qxd7 11. Nd2 Rfd8 12. Nf3 h6 13. Rc1 Qe7 14. cxd5 exd5 15. Ne5 Re8 16. e3 Bxe5 17. dxe5 Ng4 18. Qd4 Qxe5 19. Qxg4 Bxg4 20. Bxe5 Rxe5 21. b4 Be2 22. Rfe1 Bb5 23. Red1 a5 24. a3 axb4 25. axb4 Ra4 26. Rd4 g6 27. h4 Kg7 28. Bf3 Ra2 29. g4 Re6 30. Rc5 Rf6 31. Bxd5 Ra1+ 32. Kh2 Rxf2+ 33. Kg3 Re2 34. Kf4 Rf1+ 35. Ke5 Rxe3+ 36. Kd6 b6 37. Rxc6 Rf6+ 38. Kc7 Rxc6+ 39. Bxc6 Rc3 40. Rd6 Bxc6 41. Rxc6 Rxc6+ 42. Kxc6 f5 43. gxf5 gxf5 44. Kd5 Kg6 45. Ke5 b5 46. Kf4 Kf6 47. h5 Ke6 48. Kf3 Ke5 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.10"]
[Round "3"]
[White "Filip, Miroslav"]
[Black "Van Scheltinga, Theodore"]
[Result "1-0"]
[ECO "D26"]
[EventDate "1964.01.08"]
[PlyCount "119"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. e3 c6 5. Bd3 dxc4 6. Bxc4 c5 7. O-O Nc6 8. Qe2 cxd4 9. Rd1 Be7 10. exd4 O-O 11. Nc3 Na5 12. Bd3 b6 13. Bg5 Bb7 14. Rac1 Nd5 15. Qe4 g6 16. Qh4 f6 17. Bh6 Rf7 18. Qh3 Nxc3 19. bxc3 Ba3 20. Rc2 Qd7 21. Nd2 Bf8 22. Bxf8 Raxf8 23. Qg3 Qc7 24. Qe3 Re7 25. c4 Nc6 26. Rb2 Qd6 27. Nb3 Nd8 28. Be2 Kg7 29. Rc2 Qc7 30. h4 Nf7 31. Bd3 Nh6 32. Re1 Rfe8 33. Rce2 Ng4 34. Qh3 f5 35. h5 e5 36. f3 Nf6 37. h6+ Kf7 38. d5 a5 39. Nd2 Nh5 40. Bxf5 Qc5+ 41. Kh1 Nf4 42. Be6+ Rxe6 43. Ne4 Qe7 44. dxe6+ Kg8 45. Qg3 Nxe2 46. Rxe2 Bxe4 47. Rxe4 Qxe6 48. Qg5 Qe7 49. Qe3 Qc5 50. Qd3 Qf8 51. Qd5+ Kh8 52. Qd2 Re6 53. Kg1 g5 54. Qxg5 Qxh6 55. Qd8+ Kg7 56. Rg4+ Rg6 57. Qe7+ Kg8 58. Qe8+ Kg7 59. Qxe5+ Kg8 60. Rf4 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.10"]
[Round "3"]
[White "Ivkov, Borislav"]
[Black "Zuidema, Coenraad"]
[Result "1-0"]
[ECO "E15"]
[EventDate "1964.01.08"]
[PlyCount "63"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. Qa4 Be7 6. Bg2 O-O 7. Nc3 c6 8. Bf4 d6 9. Rc1 Qe8 10. O-O b5 11. cxb5 cxb5 12. Qb3 d5 13. Ne5 Bd6 14. Nd3 Bxf4 15. gxf4 Nbd7 16. Qa3 b4 17. Qxa6 bxc3 18. Rxc3 Nb6 19. Rfc1 Qb8 20. Rc7 Ne8 21. Rb7 Qd6 22. Rxa7 Nc7 23. Qa3 Qxa3 24. Rxa3 Rxa3 25. bxa3 Nc4 26. Ne5 Nxe5 27. Rxc7 Nc4 28. a4 g6 29. e4 Rb8 30. h4 Nd6 31. exd5 Rb4 32. a5 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.10"]
[Round "3"]
[White "Keres, Paul"]
[Black "Lengyel, Levente"]
[Result "1/2-1/2"]
[ECO "C67"]
[EventDate "1964.01.08"]
[PlyCount "58"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. Re1 Nd6 6. Nxe5 Be7 7. Bd3 Nxe5 8. Rxe5 O-O 9. Nc3 c6 10. b3 Ne8 11. Bb2 d5 12. Qf3 Bf6 13. Re2 Nc7 14. Ba3 Re8 15. Rae1 Rxe2 16. Nxe2 Ne6 17. Ng3 g6 18. Bd6 Ng7 19. Bc7 Qxc7 20. Qxf6 Be6 21. h4 h5 22. a4 Re8 23. Re3 Bg4 24. Qd4 Rxe3 25. dxe3 b6 26. c4 Ne6 27. Qf6 Nc5 28. Bc2 dxc4 29. bxc4 Nd7 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.10"]
[Round "3"]
[White "Nei, Iivo"]
[Black "Bobotsov, Milko"]
[Result "1-0"]
[ECO "B87"]
[EventDate "1964.01.08"]
[PlyCount "105"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. O-O Be7 8. Bb3 b5 9. Re1 O-O 10. Bg5 Bb7 11. a4 b4 12. Na2 Nxe4 13. Bxe7 Qxe7 14. Nxb4 Qf6 15. f3 Nc5 16. c3 a5 17. Nd3 Nxb3 18. Qxb3 Bd5 19. Qd1 Na6 20. Nb5 Rfd8 21. Nf2 Rac8 22. Ne4 Qe7 23. Kh1 Bxe4 24. Rxe4 d5 25. Rd4 Nc7 26. Na7 Ne8 27. Nxc8 Rxc8 28. Qe2 Qc5 29. Rdd1 Nd6 30. Rab1 Qc6 31. Ra1 h5 32. Rdc1 h4 33. Qf2 Nf5 34. Re1 Qb7 35. g4 hxg3 36. hxg3 g5 37. g4 Nh4 38. Re5 d4 39. Rxg5+ Kf8 40. Rh5 Nxf3 41. Rh8+ Ke7 42. Rxc8 Ng5+ 43. Kh2 Qxc8 44. Qf4 Qh8+ 45. Kg2 Qa8+ 46. Kg3 Ne4+ 47. Kh2 d3 48. Rf1 f6 49. g5 f5 50. Qc7+ Kf8 51. g6 Qe8 52. Qh7 Qb8+ 53. Kh1 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.10"]
[Round "3"]
[White "Parma, Bruno"]
[Black "Larsen, Bent"]
[Result "1/2-1/2"]
[ECO "B04"]
[EventDate "1964.01.08"]
[PlyCount "63"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Nc6 5. c4 Nb6 6. Be2 Bf5 7. exd6 exd6 8. O-O Be7 9. Nc3 Bf6 10. Be3 O-O 11. Rc1 d5 12. c5 Nc4 13. Nxd5 Qxd5 14. Bxc4 Qd7 15. d5 Na5 16. Bd4 Bxd4 17. Qxd4 Rad8 18. Rfd1 Nxc4 19. Qxc4 Rfe8 20. Rd4 h6 21. Rcd1 b6 22. d6 bxc5 23. Qxc5 cxd6 24. Rxd6 Qe7 25. Rxd8 Qxc5 26. Rxe8+ Kh7 27. h3 Qc2 28. Rd2 Qb1+ 29. Kh2 Qxa2 30. Rdd8 Qxb2 31. Ne5 g5 32. Nxf7 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.11"]
[Round "4"]
[White "Bobotsov, Milko"]
[Black "Ivkov, Borislav"]
[Result "0-1"]
[ECO "D13"]
[EventDate "1964.01.08"]
[PlyCount "76"]

1. c4 Nf6 2. Nc3 c6 3. Nf3 d5 4. cxd5 cxd5 5. d4 Nc6 6. Bf4 e6 7. e3 Bd6 8. Bxd6 Qxd6 9. Be2 O-O 10. O-O Bd7 11. Qb1 Rfc8 12. Rc1 Be8 13. a3 Na5 14. Qa2 Rc7 15. b4 Rac8 16. Qb2 Nc4 17. Bxc4 Rxc4 18. Ne5 R4c7 19. f3 Qa6 20. Na2 Nd7 21. Rxc7 Rxc7 22. Rc1 Rxc1+ 23. Nxc1 Nb6 24. Ncd3 f6 25. Nc5 Na4 26. Nxa6 Nxb2 27. Nc7 Ba4 28. Ng4 Kf7 29. e4 dxe4 30. fxe4 Nc4 31. Kf2 Nxa3 32. Ne3 Nb5 33. Nxb5 Bxb5 34. Nc2 Bd3 35. Na3 Bxe4 36. Nb5 Bc6 37. Nxa7 Bd7 38. b5 Ke7 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.11"]
[Round "4"]
[White "De Rooi, Paul"]
[Black "Dunkelblum, Arthur"]
[Result "1/2-1/2"]
[ECO "C15"]
[EventDate "1964.01.08"]
[PlyCount "45"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Nge2 dxe4 5. a3 Be7 6. Nxe4 Nf6 7. N2g3 O-O 8. Be3 Nc6 9. Nxf6+ Bxf6 10. c3 e5 11. d5 Ne7 12. c4 Nf5 13. Bd3 Nxe3 14. fxe3 e4 15. Bxe4 Bxb2 16. Bxh7+ Kxh7 17. Qc2+ f5 18. Qxb2 f4 19. Qe5 fxg3 20. hxg3+ Kg8 21. Qh5 Bf5 22. Qh8+ Kf7 23. Qh5+ 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.11"]
[Round "4"]
[White "Larsen, Bent"]
[Black "Portisch, Lajos"]
[Result "1/2-1/2"]
[ECO "A03"]
[EventDate "1964.01.08"]
[PlyCount "82"]

1. f4 Nf6 2. Nf3 g6 3. d3 d5 4. g3 Bg7 5. Bg2 O-O 6. c3 b6 7. O-O Bb7 8. a4 c5 9. Na3 Nc6 10. Bd2 a6 11. Qc2 Rc8 12. e4 Nb4 13. cxb4 cxb4 14. Qb3 dxe4 15. Qxb4 exf3 16. Bxf3 Bxf3 17. Rxf3 Qd5 18. Raf1 Ng4 19. h3 Bd4+ 20. Kg2 a5 21. Qb5 Rc5 22. Qxb6 Rc2 23. Nxc2 Bxb6 24. hxg4 Qb3 25. Na3 Rd8 26. Bc3 Bd4 27. Bxa5 Qxb2+ 28. Kh3 Ra8 29. Nc4 Qb3 30. f5 g5 31. Bd2 Rxa4 32. Bxg5 Ra1 33. Nd2 Qc2 34. Rxa1 Bxa1 35. Bh6 Bc3 36. Nf1 Qe2 37. Nh2 Bd4 38. Rf1 Bg7 39. Bxg7 Kxg7 40. d4 Kf6 41. Rf4 Kg7 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.11"]
[Round "4"]
[White "Lengyel, Levente"]
[Black "Nei, Iivo"]
[Result "1-0"]
[ECO "A07"]
[EventDate "1964.01.08"]
[PlyCount "167"]

1. Nf3 d5 2. g3 Nf6 3. Bg2 c6 4. O-O Bf5 5. d3 e6 6. Nbd2 Be7 7. Qe1 h6 8. e4 Bh7 9. Qe2 O-O 10. e5 Nfd7 11. Ne1 c5 12. f4 Nc6 13. Ndf3 b5 14. g4 Rc8 15. Bh3 Qc7 16. Be3 Rce8 17. Bf2 f5 18. Ng2 g5 19. Bg3 Nd4 20. Nxd4 cxd4 21. fxg5 hxg5 22. gxf5 exf5 23. e6 Bd6 24. Bxd6 Qxd6 25. Qh5 Rxe6 26. Qxg5+ Kh8 27. Qf4 Rh6 28. Qxd4+ Qe5 29. Qxe5+ Nxe5 30. Nf4 Rg8+ 31. Kh1 Rc8 32. Rf2 d4 33. Re1 Ng4 34. Bxg4 fxg4 35. Kg2 b4 36. Nd5 Bg8 37. Ne7 Rd8 38. Re5 Be6 39. Rf4 Rd7 40. Nf5 Rf6 41. Nh4 Rxf4 42. Ng6+ Kg8 43. Nxf4 Bxa2 44. Rc5 b3 45. Kg3 bxc2 46. Rxc2 Bb3 47. Rc8+ Kf7 48. Kxg4 Rb7 49. Kf5 Ba4 50. Ke5 Rb5+ 51. Kxd4 Rxb2 52. Rc7+ Kf6 53. Rxa7 Bd1 54. Nd5+ Kg5 55. Rg7+ Kh6 56. Rg1 Ba4 57. h3 Bd7 58. Nf4 Bf5 59. Ke5 Rb5+ 60. Kf6 Bh7 61. Rg4 Rf5+ 62. Ke7 Re5+ 63. Kd6 Re3 64. Rh4+ Kg7 65. d4 Bc2 66. d5 Bf5 67. Rh5 Kf6 68. h4 Ra3 69. Rg5 Ra6+ 70. Kc7 Be4 71. d6 Rc6+ 72. Kd7 Rc4 73. Nd5+ Kf7 74. Re5 Bc2 75. Nb6 Rc3 76. h5 Bd1 77. Re7+ Kg8 78. h6 Bg4+ 79. Ke8 Rc6 80. Rg7+ Kh8 81. Ke7 Bh3 82. Nd5 Ra6 83. Nf6 Ra7+ 84. Kf8 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.11"]
[Round "4"]
[White "Parma, Bruno"]
[Black "Darga, Klaus"]
[Result "1/2-1/2"]
[ECO "B04"]
[EventDate "1964.01.08"]
[PlyCount "51"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Nb6 5. Be2 g6 6. O-O Bg7 7. exd6 cxd6 8. Bf4 O-O 9. Qd2 Bg4 10. Bh6 Bxf3 11. Bxf3 d5 12. Bxg7 Kxg7 13. c3 Nc6 14. Na3 Rc8 15. Rfe1 e6 16. Be2 Na5 17. Bd3 Nac4 18. Nxc4 Nxc4 19. Bxc4 Rxc4 20. Re5 Qf6 21. Rae1 Rfc8 22. R1e3 Qf4 23. g3 Qf6 24. Kg2 Kg8 25. Rf3 Qe7 26. Rfe3 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.11"]
[Round "4"]
[White "Van Scheltinga, Theodore"]
[Black "Donner, Jan"]
[Result "1-0"]
[ECO "E18"]
[EventDate "1964.01.08"]
[PlyCount "61"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 d5 8. Ne5 Qc8 9. cxd5 exd5 10. Bg5 Qe6 11. Rc1 c6 12. Qb3 Nbd7 13. f4 Nxe5 14. fxe5 Ng4 15. Bd2 Qg6 16. Qc2 f5 17. h3 Nh6 18. Nxd5 cxd5 19. Qc7 Bg5 20. Bxg5 Qxg5 21. Qxb7 Rad8 22. Rc3 Qd2 23. e3 f4 24. exf4 Nf5 25. Rc7 Qe3+ 26. Rf2 Qxg3 27. e6 Rb8 28. Qxd5 Rbe8 29. Qe5 Rf6 30. d5 Nh4 31. Qg5 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.11"]
[Round "4"]
[White "Van den Berg, Carel"]
[Black "Keres, Paul"]
[Result "0-1"]
[ECO "E55"]
[EventDate "1964.01.08"]
[PlyCount "98"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 d5 5. Nf3 O-O 6. Bd3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Bd3 Qe7 10. Ne4 Nxe4 11. Bxe4 Rd8 12. Qc2 h6 13. a3 Ba5 14. dxc5 Qxc5 15. b4 Qxc2 16. Bxc2 Bb6 17. Bb2 Nf6 18. Ne5 Bd7 19. Nxd7 Rxd7 20. Rfd1 Rxd1+ 21. Bxd1 a5 22. Bf3 Nd5 23. Kf1 Rc8 24. Bxd5 exd5 25. Rc1 Rxc1+ 26. Bxc1 a4 27. Bb2 f6 28. Ke2 Kf7 29. Kd3 Ke6 30. h3 h5 31. g4 g6 32. f4 Bc7 33. Bd4 Bd6 34. Bc3 Bf8 35. Bd4 hxg4 36. hxg4 Bd6 37. Ke2 f5 38. Kf3 fxg4+ 39. Kxg4 Be7 40. Kf3 Kf5 41. Ke2 Ke4 42. Kd2 Bh4 43. Kc3 Be7 44. Kd2 Bd6 45. Kc3 Bf8 46. Kd2 Bh6 47. Kc3 b5 48. Bc5 Bg7+ 49. Kc2 d4 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.11"]
[Round "4"]
[White "Zuidema, Coenraad"]
[Black "Filip, Miroslav"]
[Result "1-0"]
[ECO "B82"]
[EventDate "1964.01.08"]
[PlyCount "63"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. O-O d6 7. Nc3 Nbd7 8. Be3 b5 9. f4 Bb7 10. Qf3 Rc8 11. Rae1 Be7 12. g4 Rxc3 13. bxc3 Nc5 14. Nxe6 Nxe6 15. g5 Nd7 16. Bd4 Ndc5 17. Qe3 O-O 18. Rf3 f5 19. exf5 Nxd4 20. cxd4 Nxd3 21. Qe6+ Kh8 22. Rxd3 Bxg5 23. fxg5 Qxg5+ 24. Rg3 Qd2 25. Qe3 Qxe3+ 26. Rexe3 Bc8 27. Re7 Bxf5 28. Rgxg7 Bxc2 29. Ra7 Be4 30. Rgd7 d5 31. Rxa6 Rg8+ 32. Kf2 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.13"]
[Round "5"]
[White "Darga, Klaus"]
[Black "Larsen, Bent"]
[Result "0-1"]
[ECO "E60"]
[EventDate "1964.01.08"]
[PlyCount "84"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 c5 5. Bg2 cxd4 6. Nxd4 Nc6 7. O-O O-O 8. Nc3 d6 9. b3 Qa5 10. Bb2 Bd7 11. e3 Rac8 12. a3 a6 13. Rc1 Nxd4 14. Qxd4 Bc6 15. b4 Qh5 16. Nd5 Bxd5 17. cxd5 Qe2 18. Ba1 h5 19. Rfe1 Qa2 20. Qb2 Qxb2 21. Bxb2 Ng4 22. Rxc8 Rxc8 23. Rc1 Rxc1+ 24. Bxc1 Bc3 25. h3 Ne5 26. Bf1 b5 27. f4 Nc4 28. Kf2 f5 29. Ke2 Kf7 30. Kd1 e6 31. dxe6+ Kxe6 32. Be2 d5 33. g4 fxg4 34. hxg4 h4 35. Kc2 Bg7 36. Bf1 Bb2 37. f5+ gxf5 38. gxf5+ Kd6 39. Bxb2 Nxe3+ 40. Kd3 Nxf1 41. f6 Ke6 42. Be5 Ng3 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.13"]
[Round "5"]
[White "Donner, Jan"]
[Black "Zuidema, Coenraad"]
[Result "0-1"]
[ECO "E14"]
[EventDate "1964.01.08"]
[PlyCount "126"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 Bb7 5. Bd3 d5 6. cxd5 Nxd5 7. O-O Be7 8. Qe2 Nd7 9. e4 N5f6 10. Nc3 O-O 11. Bg5 c5 12. e5 Ne8 13. Ne4 cxd4 14. Bxe7 Qxe7 15. Neg5 g6 16. Be4 Nc5 17. Bxb7 Nxb7 18. Rad1 Nc5 19. Rxd4 h6 20. b4 hxg5 21. bxc5 bxc5 22. Rc4 Ng7 23. g4 Ne8 24. Qe3 Nc7 25. Qxg5 Qxg5 26. Nxg5 Nd5 27. Rxc5 Rfb8 28. Ne4 Rb4 29. Re1 Nf4 30. Nf6+ Kg7 31. Rd1 Rd8 32. Rf1 Nd3 33. Rc3 Nxe5 34. g5 Rd3 35. Rxd3 Nxd3 36. Rd1 Nf4 37. h4 Nh5 38. Ne8+ Kf8 39. Rd8 Rg4+ 40. Kf1 Ke7 41. Ra8 Rxh4 42. Nc7 Ra4 43. Nb5 Rxa2 44. Rxa7+ Rxa7 45. Nxa7 Kd7 46. Ke2 Nf4+ 47. Ke3 e5 48. Ke4 Ke6 49. Nc6 Nh3 50. Nd8+ Ke7 51. Nb7 Nxf2+ 52. Kxe5 Nh3 53. Na5 Nxg5 54. Nc6+ Kf8 55. Nb4 Kg7 56. Nd5 Nh7 57. Nf4 f6+ 58. Ke6 Ng5+ 59. Ke7 Ne4 60. Ke6 Ng5+ 61. Ke7 Ne4 62. Ke6 Ng3 63. Ke7 g5 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.13"]
[Round "5"]
[White "Dunkelblum, Arthur"]
[Black "Van Scheltinga, Theodore"]
[Result "1/2-1/2"]
[ECO "E16"]
[EventDate "1964.01.08"]
[PlyCount "75"]

1. c4 Nf6 2. Nf3 e6 3. d4 Bb4+ 4. Bd2 Qe7 5. Nc3 b6 6. g3 Bb7 7. Bg2 O-O 8. O-O d6 9. a3 Bxc3 10. Bxc3 Ne4 11. Qc2 Nd7 12. Ng5 Qxg5 13. Bxe4 Bxe4 14. Qxe4 d5 15. cxd5 exd5 16. Qf3 Nf6 17. Rfc1 Rfd8 18. Bb4 Rd7 19. a4 a5 20. Be1 Re8 21. Rc2 Re4 22. Bd2 Qg6 23. Rac1 h5 24. e3 Ne8 25. Rc6 Re6 26. Rxe6 fxe6 27. Qd1 Rf7 28. Qc2 Qg4 29. Qd1 Qf5 30. Qe2 Nd6 31. Be1 Ne4 32. f4 Nf6 33. Qc2 Ng4 34. Qxf5 exf5 35. Bd2 Kf8 36. h3 Nf6 37. Kg2 Ke8 38. b4 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.13"]
[Round "5"]
[White "Filip, Miroslav"]
[Black "Bobotsov, Milko"]
[Result "1-0"]
[ECO "E63"]
[EventDate "1964.01.08"]
[PlyCount "65"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. c4 Nc6 7. Nc3 a6 8. d5 Na5 9. b3 e5 10. Nd2 c5 11. dxc6 Nxc6 12. Nde4 Ne8 13. Ba3 Qa5 14. Qc1 Nd4 15. b4 Qd8 16. e3 f5 17. exd4 exd4 18. Bb2 fxe4 19. Nxe4 Qb6 20. Qd2 a5 21. Ng5 Nc7 22. b5 d5 23. cxd5 Nxb5 24. Rfe1 Nd6 25. Bf1 Qb4 26. Qxb4 axb4 27. Ne6 Bxe6 28. dxe6 Rfe8 29. Rad1 Rxa2 30. Bxd4 Nf5 31. Bxg7 Kxg7 32. Rd7+ Re7 33. g4 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.13"]
[Round "5"]
[White "Ivkov, Borislav"]
[Black "Lengyel, Levente"]
[Result "1-0"]
[ECO "C98"]
[EventDate "1964.01.08"]
[PlyCount "77"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Nc6 13. dxc5 dxc5 14. Nh2 Be6 15. Ndf1 Rfd8 16. Qf3 Nd7 17. Ne3 Nd4 18. cxd4 cxd4 19. Nhf1 dxe3 20. Nxe3 Nb6 21. Bb3 Bxb3 22. axb3 f6 23. Nf5 Bb4 24. Rd1 Rxd1+ 25. Qxd1 Bc5 26. Qg4 Kf8 27. Qh4 Kg8 28. Qg4 Kf8 29. Bd2 Qd7 30. Rd1 Qf7 31. Rc1 Nd7 32. Rxc5 Nxc5 33. Bb4 Qc7 34. Bxc5+ Qxc5 35. Qxg7+ Ke8 36. Qg8+ Qf8 37. Ng7+ Kd7 38. Qd5+ Ke7 39. Nf5+ 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.13"]
[Round "5"]
[White "Keres, Paul"]
[Black "Parma, Bruno"]
[Result "1/2-1/2"]
[ECO "E14"]
[EventDate "1964.01.08"]
[PlyCount "70"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 Bb7 5. Bd3 c5 6. O-O Be7 7. Nc3 cxd4 8. exd4 O-O 9. d5 Na6 10. Bf4 exd5 11. cxd5 d6 12. a3 Nc7 13. Bc4 b5 14. Nxb5 Nxb5 15. Bxb5 Nxd5 16. Bg3 Bf6 17. Rb1 Rc8 18. Re1 Qb6 19. Bd3 Rce8 20. Re4 g6 21. Qd2 Re7 22. Bh4 Rxe4 23. Bxe4 Bxh4 24. Nxh4 Nf6 25. Bxb7 Qxb7 26. Nf3 Qb6 27. Rd1 Rc8 28. h3 d5 29. Qd4 Rc2 30. b4 Ra2 31. Rd3 Ne4 32. Qxb6 axb6 33. Rxd5 Ra1+ 34. Kh2 Rxa3 35. Rb5 Ra6 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.13"]
[Round "5"]
[White "Nei, Iivo"]
[Black "Van den Berg, Carel"]
[Result "1-0"]
[ECO "B81"]
[EventDate "1964.01.08"]
[PlyCount "49"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g4 a6 7. g5 Nfd7 8. Be3 b5 9. Bg2 Bb7 10. O-O Nb6 11. b3 N8d7 12. f4 Rc8 13. Nce2 Nc5 14. Ng3 d5 15. e5 Ne4 16. Nxe6 fxe6 17. Nxe4 Nd7 18. Ng3 Bc5 19. Bxc5 Nxc5 20. Bh3 d4 21. Rf2 Qd7 22. Qd2 O-O 23. Rd1 Rcd8 24. c3 d3 25. Qe3 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.13"]
[Round "5"]
[White "Portisch, Lajos"]
[Black "De Rooi, Paul"]
[Result "1-0"]
[ECO "E71"]
[EventDate "1964.01.08"]
[PlyCount "71"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 c5 6. Nf3 cxd4 7. Nxd4 Nc6 8. Be3 Qa5 9. Nb3 Qe5 10. Bd3 O-O 11. Qd2 Qe6 12. O-O b6 13. Nd4 Nxd4 14. Bxd4 Bb7 15. Rae1 Qd7 16. f4 e5 17. fxe5 dxe5 18. Bxe5 Nxe4 19. Rxe4 Bxe4 20. Bxg7 Qxd3 21. Qh6 f6 22. Rd1 Qc2 23. Rd2 Qc1+ 24. Kh2 Bc6 25. Bxf8 Rxf8 26. Qf4 Qe1 27. Re2 Qa1 28. Qd6 Ba8 29. Nd5 Qf1 30. Re7 Bxd5 31. cxd5 Qf5 32. Rxa7 Qe5+ 33. Qxe5 fxe5 34. Re7 Rf2 35. d6 Rd2 36. d7 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.14"]
[Round "6"]
[White "Bobotsov, Milko"]
[Black "Donner, Jan"]
[Result "0-1"]
[ECO "D60"]
[EventDate "1964.01.08"]
[PlyCount "86"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 Be7 5. Bg5 O-O 6. e3 b6 7. cxd5 Nxd5 8. Bxe7 Qxe7 9. Nxd5 exd5 10. Bd3 c5 11. dxc5 bxc5 12. O-O Be6 13. Rc1 Nd7 14. Qc2 g6 15. Rfd1 Rab8 16. Rd2 Rb4 17. Qc3 Rfb8 18. b3 a5 19. Bc2 Qd6 20. Ng5 Qb6 21. e4 d4 22. Qg3 c4 23. Nxe6 fxe6 24. bxc4 Rxc4 25. Rcd1 Rbc8 26. Bb3 Rb4 27. Qg4 Rc6 28. e5 a4 29. Bd5 Nxe5 30. Qg3 Rd6 31. Be4 Qc5 32. h4 d3 33. Bxd3 Rbd4 34. Qe3 Qd5 35. Be2 Rxd2 36. Rxd2 Qxd2 37. Qxe5 Qd4 38. Qg3 Kg7 39. h5 e5 40. Bg4 Rf6 41. Qh4 Qf4 42. f3 gxh5 43. Qxh5 Rh6 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.14"]
[Round "6"]
[White "Darga, Klaus"]
[Black "Keres, Paul"]
[Result "0-1"]
[ECO "A09"]
[EventDate "1964.01.08"]
[PlyCount "50"]

1. Nf3 d5 2. c4 dxc4 3. e3 Be6 4. Ng5 Bd5 5. e4 Bc6 6. Bxc4 e6 7. d4 Be7 8. h4 Nf6 9. Nc3 h6 10. Nxe6 fxe6 11. e5 Nd5 12. Qg4 b5 13. Bb3 b4 14. Qxe6 bxc3 15. Qg6+ Kf8 16. bxc3 Be8 17. Qf5+ Kg8 18. Rh3 a5 19. Rb1 c6 20. Bc2 Nd7 21. Rb7 Qc8 22. Rf3 Nf8 23. c4 Qxb7 24. cxd5 Bg6 25. Qg4 Bxc2 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.14"]
[Round "6"]
[White "Larsen, Bent"]
[Black "De Rooi, Paul"]
[Result "1-0"]
[ECO "E70"]
[EventDate "1964.01.08"]
[PlyCount "86"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 c5 6. d5 e6 7. Bd3 exd5 8. exd5 O-O 9. Nge2 Re8 10. O-O Nfd7 11. f4 f5 12. Bd2 Nf6 13. Qc2 Na6 14. a3 Nc7 15. Rab1 Kh8 16. Be1 Ne4 17. b4 cxb4 18. axb4 b6 19. Bxe4 fxe4 20. Nd1 b5 21. Bc3 Qe7 22. Ne3 bxc4 23. Bxg7+ Qxg7 24. Qxc4 a6 25. Nd4 Nb5 26. Nxb5 axb5 27. Qc6 Bb7 28. Qxd6 Red8 29. Qc5 Bxd5 30. Qxb5 Qd4 31. Rfe1 Ra3 32. Rbd1 Rd3 33. Qc5 Bb3 34. Rc1 Rb8 35. Kh2 Qf6 36. Rf1 Qd4 37. Ng4 Be6 38. Qc7 Ra8 39. Qe7 Bxg4 40. hxg4 Qd7 41. Qe5+ Qg7 42. Qxe4 Rdd8 43. b5 Rab8 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.14"]
[Round "6"]
[White "Lengyel, Levente"]
[Black "Filip, Miroslav"]
[Result "1/2-1/2"]
[ECO "D79"]
[EventDate "1964.01.08"]
[PlyCount "32"]

1. c4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O c6 6. d4 d5 7. cxd5 cxd5 8. Nc3 Ne4 9. Nxe4 dxe4 10. Ne5 Qd5 11. Be3 Nd7 12. Qc2 Nxe5 13. Bxe4 Qc4 14. dxe5 Qxc2 15. Bxc2 Bxe5 16. Be4 Be6 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.14"]
[Round "6"]
[White "Parma, Bruno"]
[Black "Nei, Iivo"]
[Result "1/2-1/2"]
[ECO "C92"]
[EventDate "1964.01.08"]
[PlyCount "50"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. h3 Bb7 9. d3 d6 10. c3 Nd7 11. Nbd2 Nb6 12. Nf1 Na5 13. Bc2 c5 14. Ne3 Nc6 15. Nf5 Bf6 16. Be3 Ne7 17. Ng3 g6 18. d4 Qc7 19. Bb3 Bg7 20. Nh2 a5 21. a3 a4 22. dxc5 dxc5 23. Ba2 Nc4 24. Qe2 Nxe3 25. Qxe3 c4 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.14"]
[Round "6"]
[White "Van Scheltinga, Theodore"]
[Black "Portisch, Lajos"]
[Result "0-1"]
[ECO "B14"]
[EventDate "1964.01.08"]
[PlyCount "54"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. e3 O-O 6. Bd2 cxd4 7. exd4 d5 8. c5 b6 9. a3 Bxc3 10. Bxc3 Ne4 11. Rc1 e5 12. dxe5 bxc5 13. Bd3 Bf5 14. O-O Nd7 15. Bb5 Rb8 16. Bxd7 Qxd7 17. Nh4 Be6 18. Be1 c4 19. f3 Nc5 20. Bb4 Nd3 21. Bxf8 Rxf8 22. f4 Nxc1 23. Qxc1 f5 24. Nf3 d4 25. b3 cxb3 26. Rd1 d3 27. Qc3 Rc8 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.14"]
[Round "6"]
[White "Van den Berg, Carel"]
[Black "Ivkov, Borislav"]
[Result "0-1"]
[ECO "E92"]
[EventDate "1964.01.08"]
[PlyCount "76"]

1. d4 Nf6 2. c4 c5 3. d5 d6 4. Nc3 g6 5. e4 Bg7 6. Be2 O-O 7. Nf3 e5 8. Bg5 h6 9. Bh4 g5 10. Bg3 Nh5 11. Nd2 Nf4 12. O-O Nxe2+ 13. Qxe2 Nd7 14. a3 Re8 15. b4 b6 16. Nd1 Nf8 17. Ne3 Ng6 18. Rfb1 Nf4 19. Qd1 h5 20. f3 Bh6 21. Nf5 Qf6 22. Nxh6+ Qxh6 23. bxc5 bxc5 24. Qa4 Rd8 25. Qa5 Rf8 26. Bxf4 gxf4 27. Qc7 Kh8 28. Ra2 Qg6 29. Kh1 Rg8 30. Nf1 Bh3 31. Rbb2 Rg7 32. Qa5 Rag8 33. Qd2 h4 34. Qf2 Qh5 35. Qe1 f5 36. Rf2 Rg5 37. Rae2 fxe4 38. fxe4 f3 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.14"]
[Round "6"]
[White "Zuidema, Coenraad"]
[Black "Dunkelblum, Arthur"]
[Result "1-0"]
[ECO "C16"]
[EventDate "1964.01.08"]
[PlyCount "31"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Qd7 5. Nge2 b6 6. Nf4 Ne7 7. Qg4 g6 8. Bd3 Nf5 9. Bxf5 exf5 10. Qf3 c6 11. O-O O-O 12. Ncxd5 cxd5 13. Nxd5 Bb7 14. Nf6+ Kh8 15. Qh3 h5 16. Qe3 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.15"]
[Round "7"]
[White "De Rooi, Paul"]
[Black "Van Scheltinga, Theodore"]
[Result "0-1"]
[ECO "A17"]
[EventDate "1964.01.08"]
[PlyCount "68"]

1. c4 Nf6 2. Nc3 e6 3. g3 d5 4. cxd5 exd5 5. d4 c6 6. Bg2 Be7 7. Nf3 Bf5 8. Nh4 Be6 9. Qd3 g6 10. O-O Nh5 11. e4 dxe4 12. Nxe4 O-O 13. Bh6 Re8 14. Bf3 Ng7 15. Qc3 Bd5 16. Rfe1 Nd7 17. Ng2 Nf5 18. Bf4 Qb6 19. Red1 Rad8 20. Ne3 Nxe3 21. Bxe3 Nf6 22. Nxf6+ Bxf6 23. Be2 Qc7 24. Qe1 Qe7 25. Rd3 Qe4 26. f3 Qxe3+ 27. Rxe3 Bxd4 28. Kg2 Rxe3 29. Qd2 Bb6 30. Qc2 Rde8 31. Bc4 Bxf3+ 32. Kf1 Bg4 33. Bxf7+ Kxf7 34. Qc4+ Be6 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.15"]
[Round "7"]
[White "Donner, Jan"]
[Black "Lengyel, Levente"]
[Result "1/2-1/2"]
[ECO "E51"]
[EventDate "1964.01.08"]
[PlyCount "75"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 Nc6 7. O-O a6 8. Qe2 dxc4 9. Bxc4 Bd6 10. Rd1 Qe8 11. Ng5 e5 12. Nge4 Nxe4 13. Nxe4 Bf5 14. Nxd6 cxd6 15. dxe5 dxe5 16. Bd2 Be6 17. Bc3 Qe7 18. Bd5 Bxd5 19. Rxd5 Rfd8 20. Rad1 Rxd5 21. Rxd5 Rd8 22. Qc4 Rxd5 23. Qxd5 h6 24. Kf1 Qh4 25. h3 Qa4 26. Kg1 Qb5 27. Qd7 f6 28. g4 g6 29. Kg2 a5 30. Kg3 Qc5 31. h4 Ne7 32. Qe6+ Kf8 33. Kf3 Nd5 34. g5 Nxc3 35. gxh6 e4+ 36. Kg2 Qh5 37. bxc3 Qf3+ 38. Kg1 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.15"]
[Round "7"]
[White "Dunkelblum, Arthur"]
[Black "Bobotsov, Milko"]
[Result "0-1"]
[ECO "E62"]
[EventDate "1964.01.08"]
[PlyCount "96"]

1. c4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. d4 Nc6 7. Nc3 Bg4 8. Be3 Nd7 9. Qd2 e5 10. dxe5 dxe5 11. Rad1 Nb6 12. Qxd8 Rfxd8 13. b3 Nd4 14. h3 Bxf3 15. Bxf3 c6 16. Bg2 f5 17. Bc1 e4 18. f3 exf3 19. exf3 Nxb3 20. axb3 Bxc3 21. Be3 Kf7 22. Kf2 Bf6 23. Bxb6 axb6 24. Rxd8 Rxd8 25. Ke2 Ra8 26. Rd1 Ke6 27. f4 Bc3 28. Kd3 Bb4 29. Ke3 Ra3 30. Rd3 Ra2 31. Kf3 h5 32. Bf1 Bc5 33. Be2 Rb2 34. Rd1 Rxb3+ 35. Bd3 Rb2 36. g4 h4 37. gxf5+ gxf5 38. Be2 Rc2 39. Rd8 Rc3+ 40. Rd3 Rxc4 41. Re3+ Re4 42. Rxe4+ fxe4+ 43. Kxe4 Be7 44. Bg4+ Kd6 45. Kf5 b5 46. Kg6 b4 47. Bd1 c5 48. f5 Ke5 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.15"]
[Round "7"]
[White "Filip, Miroslav"]
[Black "Van den Berg, Carel"]
[Result "1-0"]
[ECO "A26"]
[EventDate "1964.01.08"]
[PlyCount "55"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. a3 g6 5. g3 Bg7 6. Bg2 O-O 7. O-O d6 8. d3 Re8 9. Nd2 Bd7 10. b4 Qc8 11. Re1 Bh3 12. Bh1 e4 13. dxe4 Ng4 14. Bb2 Nce5 15. Qb3 f5 16. Nd5 Bh6 17. Nf4 Nf6 18. c5+ Kf8 19. exf5 Qxf5 20. e3 Bxf4 21. exf4 Nd3 22. Ne4 Nxe1 23. Nxf6 Re6 24. Nxh7+ Ke7 25. cxd6+ cxd6 26. Qc3 Qd3 27. Qg7+ Kd8 28. Bf6+ 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.15"]
[Round "7"]
[White "Ivkov, Borislav"]
[Black "Parma, Bruno"]
[Result "1/2-1/2"]
[ECO "B19"]
[EventDate "1964.01.08"]
[PlyCount "60"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. Bd3 Bxd3 9. Qxd3 e6 10. Bf4 Qa5+ 11. Bd2 Qc7 12. O-O-O Ngf6 13. Kb1 O-O-O 14. c4 c5 15. Qe2 Bd6 16. Ne4 Nxe4 17. Qxe4 Nf6 18. Qe2 a6 19. Bc3 cxd4 20. Bxd4 Bc5 21. Bxc5 Qxc5 22. Ne5 Qc7 23. Rhe1 Rxd1+ 24. Rxd1 Rd8 25. Rxd8+ Kxd8 26. Qd3+ Ke7 27. Qd4 h5 28. b4 Ng4 29. Nxg4 hxg4 30. Qxg4 Qd6 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.15"]
[Round "7"]
[White "Keres, Paul"]
[Black "Larsen, Bent"]
[Result "1/2-1/2"]
[ECO "B35"]
[EventDate "1964.01.08"]
[PlyCount "135"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. f3 O-O 8. Bc4 Qb6 9. a3 d6 10. Nce2 Qa5+ 11. c3 Ne5 12. Ba2 Qa6 13. O-O Bd7 14. a4 Nc4 15. Bxc4 Qxc4 16. b3 Qc7 17. Nb5 Qb8 18. c4 b6 19. Bd4 Qb7 20. Nbc3 Bc6 21. Qd2 e6 22. Rfd1 Rfd8 23. Qb2 e5 24. Be3 a6 25. Rd2 h6 26. Rad1 Bf8 27. Bf2 Rab8 28. Ra1 Ra8 29. Bh4 Be7 30. b4 a5 31. b5 Be8 32. Bf2 Rac8 33. Nd5 Nxd5 34. cxd5 Rc4 35. Rc2 Rxc2 36. Qxc2 Rc8 37. Qd3 Bd8 38. g4 Qe7 39. Kg2 Bd7 40. Be3 h5 41. gxh5 f5 42. Bd2 f4 43. Kh1 g5 44. Ng1 Qh7 45. h3 Qxh5 46. Kg2 Kf7 47. Rc1 Qh4 48. Rxc8 Bxh3+ 49. Nxh3 Qg3+ 50. Kf1 Qxh3+ 51. Kg1 Qxc8 52. Qc3 Qh3 53. Be1 Be7 54. Qd3 g4 55. Qf1 Qh7 56. Qg2 gxf3 57. Qxf3 Bh4 58. Bd2 Bg3 59. Be3 Qh3 60. Bc1 Qh2+ 61. Kf1 Qh3+ 62. Ke2 Ke7 63. Kd3 Qh4 64. Bd2 Bf2 65. Qg2 Kf7 66. Qf3 Bc5 67. Be1 Qxe1 68. Qh5+ 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.15"]
[Round "7"]
[White "Nei, Iivo"]
[Black "Darga, Klaus"]
[Result "1-0"]
[ECO "B82"]
[EventDate "1964.01.08"]
[PlyCount "57"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Be3 Nf6 6. Nc3 d6 7. f4 Nbd7 8. Qf3 Qc7 9. O-O-O b5 10. e5 Bb7 11. Qh3 dxe5 12. Nxe6 fxe6 13. Qxe6+ Be7 14. Bxb5 axb5 15. Nxb5 Qc6 16. Nd6+ Kd8 17. fxe5 Kc7 18. Rd4 Ra5 19. exf6 Re5 20. Nb5+ Qxb5 21. Rxd7+ Qxd7 22. Qxe5+ Bd6 23. Qc3+ Qc6 24. Qa5+ Kc8 25. fxg7 Rg8 26. Bd4 Bf4+ 27. Kb1 Qd7 28. Qc5+ Bc6 29. Qf8+ 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.15"]
[Round "7"]
[White "Portisch, Lajos"]
[Black "Zuidema, Coenraad"]
[Result "1-0"]
[ECO "E15"]
[EventDate "1964.01.08"]
[PlyCount "49"]

1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Bxd2+ 5. Qxd2 b6 6. g3 Ba6 7. Na3 c6 8. Bg2 d6 9. O-O O-O 10. Rfd1 Qe7 11. Rac1 Nbd7 12. Nc2 Rac8 13. Qb4 Bb7 14. Qa3 Rc7 15. Ne5 Ba8 16. Nxd7 Nxd7 17. e4 c5 18. Ne3 g6 19. Qd3 Rd8 20. f4 Rcc8 21. Rc2 cxd4 22. Qxd4 Qf6 23. Rcd2 Kg7 24. Qxd6 Nc5 25. e5 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.17"]
[Round "8"]
[White "Bobotsov, Milko"]
[Black "Portisch, Lajos"]
[Result "0-1"]
[ECO "D36"]
[EventDate "1964.01.08"]
[PlyCount "81"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. cxd5 exd5 5. Nc3 c6 6. Bg5 h6 7. Bh4 Bf5 8. e3 Be7 9. Bd3 Ne4 10. Bxe7 Qxe7 11. Qc2 Nd7 12. O-O O-O 13. Nd2 Rfe8 14. Rae1 Ndf6 15. Nb3 Nxc3 16. bxc3 Bxd3 17. Qxd3 Qe4 18. Qe2 b6 19. c4 c5 20. dxc5 dxc4 21. Nd2 Qc6 22. Qxc4 Rac8 23. Rc1 Qxc5 24. Qxc5 Rxc5 25. Rxc5 bxc5 26. Rc1 Nd7 27. Kf1 Kf8 28. Ke2 Re6 29. Rc2 Ke7 30. Nc4 Ra6 31. Rb2 Kd8 32. Kd3 Kc7 33. e4 Nb6 34. Rb5 Nd7 35. Rb2 Ra4 36. e5 Kc6 37. Re2 Kd5 38. Ne3+ Kxe5 39. Nd1+ Kf6 40. Re4 Rxa2 41. Rf4+ 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.17"]
[Round "8"]
[White "Darga, Klaus"]
[Black "Ivkov, Borislav"]
[Result "0-1"]
[ECO "C90"]
[EventDate "1964.01.08"]
[PlyCount "92"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. d3 d6 9. c3 Na5 10. Bc2 c5 11. Nbd2 Nd7 12. Nf1 Nb6 13. Ne3 Bf6 14. h3 g6 15. d4 cxd4 16. cxd4 Nc6 17. dxe5 Nxe5 18. Nxe5 Bxe5 19. Bb3 Qh4 20. Ng4 Bxg4 21. Qxg4 Qxg4 22. hxg4 Rac8 23. Re2 Nc4 24. g3 Rfe8 25. Kf1 Bg7 26. Rb1 h6 27. g5 hxg5 28. Bxg5 Rc5 29. Bf4 g5 30. Bxc4 gxf4 31. Bd5 fxg3 32. fxg3 Be5 33. Rd1 Kg7 34. Kg2 a5 35. a3 a4 36. Rd3 Rc1 37. Rf3 f6 38. b3 Rec8 39. bxa4 bxa4 40. Be6 Rh8 41. Rd3 Kg6 42. Rf2 Re8 43. Bf5+ Kg5 44. Bd7 Rb8 45. Rf5+ Kh6 46. Rxd6 Rc2+ 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.17"]
[Round "8"]
[White "Keres, Paul"]
[Black "Nei, Iivo"]
[Result "1/2-1/2"]
[ECO "D13"]
[EventDate "1964.01.08"]
[PlyCount "60"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. cxd5 cxd5 6. Bg5 Be7 7. e3 Nc6 8. Bd3 a6 9. O-O O-O 10. Rc1 Bd7 11. Qe2 h6 12. Bh4 Rc8 13. Bb1 b5 14. a3 Ne8 15. Bxe7 Nxe7 16. Ne5 Nd6 17. e4 Bc6 18. exd5 Bxd5 19. Qd3 g6 20. Nxd5 exd5 21. Qd2 Kg7 22. Qf4 Nef5 23. Rxc8 Qxc8 24. h4 Qe6 25. Rc1 Rc8 26. Rxc8 Qxc8 27. Nf3 Qe6 28. Bd3 Nc4 29. Qc1 Ne7 30. b3 Nd6 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.17"]
[Round "8"]
[White "Larsen, Bent"]
[Black "Van Scheltinga, Theodore"]
[Result "1-0"]
[ECO "A03"]
[EventDate "1964.01.08"]
[PlyCount "67"]

1. f4 Nf6 2. Nf3 d5 3. e3 g6 4. Be2 Bg7 5. O-O O-O 6. d3 b6 7. a4 Bb7 8. Qe1 c5 9. Nbd2 Nc6 10. Qh4 e6 11. Rf2 Nb4 12. Ne1 Ne8 13. Qh3 Nd6 14. g4 f5 15. gxf5 exf5 16. Ndf3 Nf7 17. c3 Nc6 18. d4 Na5 19. Bd1 c4 20. Ne5 Nxe5 21. fxe5 Nb3 22. Bxb3 cxb3 23. Ng2 Qg5 24. Rf4 Qe7 25. Bd2 Ba6 26. Rh4 g5 27. Rxh7 Be2 28. c4 Bxc4 29. Nf4 gxf4 30. Kf2 fxe3+ 31. Bxe3 f4 32. Bd2 Kf7 33. Qh5+ Ke6 34. Qg4+ 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.17"]
[Round "8"]
[White "Lengyel, Levente"]
[Black "Dunkelblum, Arthur"]
[Result "1-0"]
[ECO "A08"]
[EventDate "1964.01.08"]
[PlyCount "71"]

1. g3 c5 2. Bg2 Nf6 3. Nf3 g6 4. O-O Bg7 5. d3 d5 6. Nbd2 O-O 7. e4 Qc7 8. c3 Nc6 9. Re1 e6 10. e5 Nd7 11. d4 b6 12. a3 Ba6 13. Nf1 Rac8 14. Ne3 cxd4 15. cxd4 Na5 16. b4 Nc6 17. h4 Ne7 18. h5 Rfe8 19. hxg6 fxg6 20. a4 Nf5 21. Nxf5 gxf5 22. b5 Bb7 23. Ng5 Nf8 24. g4 h6 25. Nh3 Qf7 26. Qf3 Ng6 27. Qg3 Rc4 28. gxf5 Qxf5 29. Bb2 Kf7 30. Ra3 Qc2 31. Rf3+ Kg8 32. Bf1 Ne7 33. Nf4 Nf5 34. Qg6 Re7 35. Nxe6 Nh4 36. Rf8# 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.17"]
[Round "8"]
[White "Parma, Bruno"]
[Black "Filip, Miroslav"]
[Result "1/2-1/2"]
[ECO "C76"]
[EventDate "1964.01.08"]
[PlyCount "61"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. d4 g6 7. O-O Bg7 8. dxe5 dxe5 9. Be3 Nf6 10. Nbd2 O-O 11. b4 Qc8 12. Qe2 Nh5 13. g3 Re8 14. Bb3 Nd8 15. Rfd1 Bg4 16. Nc4 h6 17. Rd2 Nc6 18. Rd3 Nf6 19. Ncd2 Rd8 20. Rxd8+ Qxd8 21. Rd1 Qe8 22. Bc2 Rd8 23. Nb3 Rxd1+ 24. Qxd1 Qd7 25. Qxd7 Nxd7 26. Nfd2 Be6 27. Kf1 Bf8 28. Ke2 f6 29. Bd3 Kf7 30. Bc4 Bxc4+ 31. Nxc4 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.17"]
[Round "8"]
[White "Van den Berg, Carel"]
[Black "Donner, Jan"]
[Result "0-1"]
[ECO "B18"]
[EventDate "1964.01.08"]
[PlyCount "30"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Bc4 e6 7. N1e2 Qh4 8. Bf4 Nf6 9. Qd2 h6 10. O-O Nbd7 11. Bb3 Be7 12. a4 a5 13. Bc7 b6 14. Nf4 Bh7 15. Ngh5 Nxh5 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.17"]
[Round "8"]
[White "Zuidema, Coenraad"]
[Black "De Rooi, Paul"]
[Result "1-0"]
[ECO "B32"]
[EventDate "1964.01.08"]
[PlyCount "83"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 a6 6. Nd6+ Bxd6 7. Qxd6 Qf6 8. Qa3 Nge7 9. Nc3 Rb8 10. Be3 b5 11. Nd5 Nxd5 12. exd5 b4 13. Qd3 Ne7 14. Qd2 Qd6 15. O-O-O Bb7 16. f4 O-O 17. fxe5 Qxd5 18. Qxd5 Nxd5 19. Bd4 Rfc8 20. b3 Nf4 21. Rd2 a5 22. Bc4 Ne6 23. Rf1 Be4 24. Ba7 Rb7 25. Ba6 Rxa7 26. Bxc8 Nc5 27. Rf4 Bc6 28. Rc4 Ne4 29. Rxc6 Nxd2 30. Bxd7 Kf8 31. Kxd2 Rxd7+ 32. Rd6 Rxd6+ 33. exd6 Ke8 34. c4 bxc3+ 35. Kxc3 Kd7 36. a4 Kxd6 37. b4 axb4+ 38. Kxb4 f5 39. Kc4 g5 40. Kd4 f4 41. Ke4 Kc5 42. Kf5 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.18"]
[Round "9"]
[White "De Rooi, Paul"]
[Black "Bobotsov, Milko"]
[Result "0-1"]
[ECO "A16"]
[EventDate "1964.01.08"]
[PlyCount "54"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. b3 c6 6. e4 d5 7. cxd5 cxd5 8. exd5 Nbd7 9. Bb2 Nb6 10. Nge2 Nfxd5 11. O-O Bf5 12. a4 a5 13. d4 Rc8 14. Qd2 Be6 15. Ne4 Nb4 16. Rfc1 Bxb3 17. Rxc8 Qxc8 18. Rc1 Qa8 19. Nc5 Bd5 20. Bh3 Nc4 21. Rxc4 Bxc4 22. Nd7 Rd8 23. Nb6 Qa6 24. Nxc4 Qxc4 25. Bf1 Qc2 26. Qxc2 Nxc2 27. Bc3 b6 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.18"]
[Round "9"]
[White "Donner, Jan"]
[Black "Parma, Bruno"]
[Result "1/2-1/2"]
[ECO "E58"]
[EventDate "1964.01.08"]
[PlyCount "114"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O Nc6 8. a3 Bxc3 9. bxc3 Qc7 10. cxd5 exd5 11. Nh4 Ne7 12. a4 Ng6 13. Nf5 c4 14. Bc2 Ne4 15. Ng3 f5 16. Ne2 Bd7 17. f3 Nd6 18. Ng3 Rae8 19. Qd2 Rf7 20. Ba3 Ref8 21. a5 Bc6 22. Bc5 a6 23. Rae1 Qd7 24. Re2 Kh8 25. Nh5 Kg8 26. Qe1 Ne7 27. Qh4 g6 28. Nf4 Nec8 29. Nh3 Qe7 30. Qg3 Qf6 31. Qe1 Re8 32. Qd2 Rfe7 33. Rfe1 Qf7 34. Nf2 Qf6 35. e4 dxe4 36. d5 e3 37. Rxe3 Rxe3 38. Rxe3 Bd7 39. Bd4 Qf7 40. Be5 Nb5 41. Nh3 Qf8 42. f4 Ncd6 43. Ng5 Nf7 44. Nxf7 Qxf7 45. Bd1 Qe7 46. Be2 Qc5 47. Kf2 Rxe5 48. fxe5 f4 49. d6 Be6 50. Bf3 Na3 51. Bxb7 Nc2 52. Kf3 fxe3 53. Qxc2 Qxe5 54. Qe4 Qxd6 55. Kxe3 Bf7 56. Ke2 Qa3 57. Bd5 Qb2+ 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.18"]
[Round "9"]
[White "Dunkelblum, Arthur"]
[Black "Van den Berg, Carel"]
[Result "1/2-1/2"]
[ECO "A35"]
[EventDate "1964.01.08"]
[PlyCount "60"]

1. Nf3 c5 2. c4 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. e3 Nf6 7. Be2 O-O 8. O-O b6 9. Bf3 Bb7 10. b3 Qb8 11. Bb2 Re8 12. Qe2 e5 13. Nxc6 dxc6 14. e4 Nd7 15. Rfd1 Nc5 16. Bg4 Bc8 17. Bxc8 Qxc8 18. Qe3 Ne6 19. Ne2 Qc7 20. Rd2 Rad8 21. Rad1 Rxd2 22. Rxd2 Rd8 23. f3 Bf8 24. Kf1 f6 25. Bc3 Bc5 26. Rxd8+ Qxd8 27. Qd2 Qxd2 28. Bxd2 Kf7 29. Bc3 Be3 30. Ke1 Ke7 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.18"]
[Round "9"]
[White "Filip, Miroslav"]
[Black "Darga, Klaus"]
[Result "1/2-1/2"]
[ECO "A12"]
[EventDate "1964.01.08"]
[PlyCount "74"]

1. Nf3 Nf6 2. c4 c6 3. g3 d5 4. b3 Bg4 5. Bg2 e6 6. Bb2 Nbd7 7. O-O Bd6 8. d3 O-O 9. Nc3 Re8 10. h3 Bh5 11. a3 a5 12. Qc2 Qb6 13. Na4 Qa7 14. Nd4 Rac8 15. Qd2 Bg6 16. cxd5 exd5 17. Bc3 b5 18. Nb2 Be5 19. e3 Bxd4 20. Bxd4 c5 21. Bxf6 Nxf6 22. Rac1 Red8 23. f4 Bf5 24. g4 Bd7 25. Rfd1 Bc6 26. Qf2 Ba8 27. g5 Ne8 28. h4 f5 29. gxf6 Nxf6 30. Bh3 Rc6 31. Kh2 Qe7 32. Rg1 Re8 33. Nd1 h6 34. Bf5 Bb7 35. Qg3 Bc8 36. Bxc8 Rcxc8 37. Rc2 Rc7 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.18"]
[Round "9"]
[White "Ivkov, Borislav"]
[Black "Keres, Paul"]
[Result "0-1"]
[ECO "C96"]
[EventDate "1964.01.08"]
[PlyCount "104"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5 11. d4 Nd7 12. Nbd2 cxd4 13. cxd4 Nc6 14. Nf1 exd4 15. Nxd4 Nxd4 16. Qxd4 Ne5 17. Qd1 Bf6 18. Ne3 Be6 19. Nd5 Bxd5 20. Qxd5 Rc8 21. Bb3 Nc4 22. Re2 Rc5 23. Qd1 d5 24. exd5 Rxd5 25. Qe1 Rd4 26. Rb1 Qd6 27. Be3 Nxe3 28. Rxe3 g6 29. Re2 Kg7 30. Rd1 Rc8 31. Rc1 Rxc1 32. Qxc1 h5 33. Re1 a5 34. Rd1 a4 35. Bc2 Rxd1+ 36. Bxd1 Qe6 37. Qc2 Qe1+ 38. Kh2 Be5+ 39. g3 h4 40. Kg2 hxg3 41. Bf3 gxf2 42. Qxf2 Qc1 43. b3 axb3 44. axb3 Qf4 45. Kf1 Bd4 46. Qe2 Qf5 47. Qe4 Qxh3+ 48. Ke2 Qd7 49. b4 Bc3 50. Qc6 Qd2+ 51. Kf1 Qe1+ 52. Kg2 Bd4 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.18"]
[Round "9"]
[White "Nei, Iivo"]
[Black "Larsen, Bent"]
[Result "1-0"]
[ECO "B37"]
[EventDate "1964.01.08"]
[PlyCount "83"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Nc2 b6 7. Be2 Ba6 8. O-O Rc8 9. Nba3 Nf6 10. f3 O-O 11. b3 Qc7 12. Rb1 e6 13. b4 Ne7 14. Bb2 Nh5 15. Bxg7 Kxg7 16. Rf2 Rfd8 17. Nd4 Qe5 18. g3 Nf6 19. f4 Qb8 20. Ndb5 d6 21. Bd3 h5 22. Qe2 Bb7 23. Qb2 a6 24. Nd4 e5 25. Nf3 Ng4 26. Re2 f6 27. Nc2 b5 28. cxb5 Nf5 29. bxa6 Qa7+ 30. Kg2 Rxc2 31. Rxc2 Nfe3+ 32. Kh1 Bxa6 33. Bxa6 Qxa6 34. Rc7+ Kh8 35. h3 Qd3 36. Re1 Nf1 37. Qg2 Nge3 38. Qf2 h4 39. Nxh4 Qxe4+ 40. Ng2 exf4 41. gxf4 g5 42. Rxe3 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.18"]
[Round "9"]
[White "Portisch, Lajos"]
[Black "Lengyel, Levente"]
[Result "1/2-1/2"]
[ECO "E18"]
[EventDate "1964.01.08"]
[PlyCount "52"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Nxe4 Bxe4 9. Ne1 Bxg2 10. Nxg2 d5 11. Qa4 c5 12. dxc5 Bxc5 13. cxd5 Qxd5 14. Rd1 Qc6 15. Qxc6 Nxc6 16. Be3 Bxe3 17. Nxe3 Rfd8 18. Kf1 Kf8 19. Ke1 Ke7 20. Rxd8 Rxd8 21. Rc1 Nd4 22. Rc7+ Rd7 23. Rc8 Rd8 24. Rc7+ Rd7 25. Rc8 Rd8 26. Rc7+ Rd7 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.18"]
[Round "9"]
[White "Van Scheltinga, Theodore"]
[Black "Zuidema, Coenraad"]
[Result "1/2-1/2"]
[ECO "E09"]
[EventDate "1964.01.08"]
[PlyCount "67"]

1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. d4 c6 6. Nbd2 O-O 7. O-O Nbd7 8. Qc2 b5 9. b3 bxc4 10. bxc4 Ba6 11. Bb2 Rb8 12. Rab1 Qa5 13. Bc3 Bb4 14. Bxb4 Rxb4 15. Rxb4 Qxb4 16. Rb1 Qa5 17. Bf1 c5 18. cxd5 Nxd5 19. Nb3 Qc3 20. Qd1 cxd4 21. Qxd4 Qxd4 22. Nbxd4 Rc8 23. e4 Bxf1 24. exd5 Bd3 25. Rd1 Bc4 26. dxe6 fxe6 27. Nc6 Rc7 28. Nce5 Bd5 29. Rb1 g6 30. Nxd7 Bxf3 31. Ne5 Bd5 32. a4 Rc2 33. f3 Ra2 34. Rc1 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.19"]
[Round "10"]
[White "Bobotsov, Milko"]
[Black "Van Scheltinga, Theodore"]
[Result "1-0"]
[ECO "A34"]
[EventDate "1964.01.08"]
[PlyCount "65"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nc6 7. O-O Be7 8. d4 Nxc3 9. bxc3 O-O 10. Rb1 Qa5 11. Qc2 cxd4 12. Nxd4 Nd8 13. Rb5 Qa6 14. Be4 g6 15. Bh6 Re8 16. Rfb1 Bd7 17. Bd3 e5 18. Rxe5 Qf6 19. f4 Qd6 20. Be4 Bf6 21. Rxe8+ Bxe8 22. Rd1 Rc8 23. Kg2 Qa6 24. Qd2 Ba4 25. Rb1 Nc6 26. Bf3 Qa5 27. Qe3 Nxd4 28. cxd4 Re8 29. Qd3 Bc6 30. d5 Rd8 31. dxc6 bxc6 32. Qc4 Qd2 33. Rb7 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.19"]
[Round "10"]
[White "Darga, Klaus"]
[Black "Donner, Jan"]
[Result "1-0"]
[ECO "B11"]
[EventDate "1964.01.08"]
[PlyCount "41"]

1. e4 c6 2. Nc3 d5 3. Nf3 Bg4 4. h3 Bxf3 5. Qxf3 Nf6 6. d3 e6 7. Bd2 Nbd7 8. g4 g6 9. O-O-O Bg7 10. h4 h5 11. g5 Ng4 12. Bh3 Qb6 13. Rde1 Nge5 14. Qg3 dxe4 15. Rxe4 c5 16. Rhe1 Nc6 17. Rxe6+ fxe6 18. Rxe6+ Kf7 19. Qf4+ Kg8 20. Rxg6 Qd8 21. Be6+ 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.19"]
[Round "10"]
[White "Keres, Paul"]
[Black "Filip, Miroslav"]
[Result "1-0"]
[ECO "C93"]
[EventDate "1964.01.08"]
[PlyCount "123"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 h6 10. d4 Re8 11. Nbd2 Bf8 12. Bc2 Bb7 13. a3 Nb8 14. b4 Nbd7 15. Bb2 Qb8 16. c4 exd4 17. cxb5 axb5 18. Nxd4 c5 19. bxc5 Nxc5 20. Nf5 Re6 21. Qf3 Nfd7 22. Rab1 Qe8 23. Nd4 Rg6 24. Nxb5 Rc8 25. Nd4 Ne5 26. Qe3 Ba6 27. Red1 Ne6 28. Bb3 Nd3 29. Nxe6 fxe6 30. Nf3 Nxb2 31. Rxb2 Kh8 32. Qb6 Rc6 33. Qa7 Qe7 34. Qxe7 Bxe7 35. e5 Rb6 36. exd6 Bxd6 37. Rxd6 Rxd6 38. Bc2 Bd3 39. Ne5 Bxc2 40. Nf7+ Kh7 41. Nxd6 Bd3 42. Rb3 Bc2 43. Rc3 Bb1 44. Re3 Rf6 45. Ne8 Rf7 46. Rxe6 Ra7 47. Re3 Rd7 48. Rc3 Bg6 49. Nc7 Rd1+ 50. Kh2 Ra1 51. Ne6 Bf7 52. Nc5 Bd5 53. h4 Kg6 54. Nd3 Kf6 55. f3 g5 56. hxg5+ hxg5 57. Kg3 Kg6 58. Ne5+ Kf5 59. Ng4 Kg6 60. Rc5 Be6 61. Rc6 Kf7 62. Ra6 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.19"]
[Round "10"]
[White "Larsen, Bent"]
[Black "Zuidema, Coenraad"]
[Result "1-0"]
[ECO "A02"]
[EventDate "1964.01.08"]
[PlyCount "71"]

1. f4 e5 2. fxe5 d6 3. exd6 Bxd6 4. Nf3 g5 5. g3 g4 6. Nh4 Ne7 7. d4 Ng6 8. Ng2 Nc6 9. c3 h5 10. e4 h4 11. e5 Be7 12. Rg1 hxg3 13. hxg3 Rh2 14. Be3 Bf5 15. Nd2 Bg5 16. Qe2 Be7 17. Bf2 Qd7 18. Ne3 O-O-O 19. Rg2 Rh1 20. Nxf5 Qxf5 21. Nc4 Bg5 22. Rg1 Rh2 23. Bg2 Nge7 24. Be3 Nd5 25. Rf1 Qg6 26. Qxg4+ Kb8 27. Bxd5 Rxd5 28. Bxg5 Qd3 29. e6 Rxd4 30. exf7 Rxg4 31. f8=Q+ Nd8 32. Qxd8+ Qxd8 33. Bxd8 Re4+ 34. Kd1 Rxc4 35. Bg5 b6 36. Bd2 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.19"]
[Round "10"]
[White "Lengyel, Levente"]
[Black "De Rooi, Paul"]
[Result "1-0"]
[ECO "D78"]
[EventDate "1964.01.08"]
[PlyCount "55"]

1. d4 Nf6 2. c4 g6 3. g3 c6 4. Bg2 d5 5. Nd2 Bg7 6. Ngf3 O-O 7. b3 Nbd7 8. Bb2 e6 9. Qc2 Re8 10. O-O Nf8 11. Ne5 N6d7 12. Nd3 dxc4 13. Nxc4 Nb6 14. Nce5 f6 15. Nf3 Nfd7 16. Rfd1 Qe7 17. a4 e5 18. e4 a5 19. b4 Qf7 20. dxe5 Nxe5 21. Ndxe5 fxe5 22. bxa5 Rxa5 23. Bc3 Ra8 24. Ng5 Qc7 25. Qb3+ Kh8 26. a5 Qe7 27. Nf7+ Kg8 28. Nd6+ 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.19"]
[Round "10"]
[White "Nei, Iivo"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[ECO "D35"]
[EventDate "1964.01.08"]
[PlyCount "44"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. cxd5 exd5 6. Bf4 c6 7. Qc2 g6 8. e3 Bf5 9. Bd3 Bxd3 10. Qxd3 Na6 11. O-O Nc7 12. Be5 O-O 13. Rfc1 Bd6 14. Rab1 a5 15. a3 Bxe5 16. Nxe5 Nd7 17. Nxd7 Qxd7 18. Na4 Qe7 19. Nc3 Qd7 20. Na4 Qe7 21. Nc3 Qd7 22. Na4 Qe7 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.19"]
[Round "10"]
[White "Parma, Bruno"]
[Black "Dunkelblum, Arthur"]
[Result "1-0"]
[ECO "B17"]
[EventDate "1964.01.08"]
[PlyCount "111"]

1. e4 c6 2. Nc3 d5 3. Nf3 dxe4 4. Nxe4 Nd7 5. Bc4 e6 6. Qe2 Be7 7. d4 Ngf6 8. Nxf6+ Nxf6 9. Bd2 Qc7 10. O-O-O O-O 11. g4 b5 12. Bd3 Bb7 13. g5 Nh5 14. Ne5 g6 15. Rhg1 Rac8 16. Kb1 Rfd8 17. Rg4 c5 18. dxc5 Bxc5 19. Bc1 Rd5 20. Re1 Bxf2 21. Qxf2 Rxe5 22. Rf1 Rd5 23. Rh4 Ng7 24. Rf4 Nf5 25. h4 Qc5 26. Qh2 Rd4 27. Rxd4 Qxd4 28. h5 gxh5 29. b3 h4 30. Re1 Ng3 31. Bb2 Qf4 32. Rf1 Qxg5 33. Bxh7+ Kf8 34. Re1 Rd8 35. Bd3 Rd5 36. Qf2 Qd8 37. Bf6 Qd6 38. Qxa7 Bc6 39. Qe3 Ke8 40. Qh6 Qf8 41. Qxh4 Nf5 42. Qh7 Kd7 43. Be4 Rc5 44. Rd1+ Nd6 45. Bb2 b4 46. Qh4 Bxe4 47. Qxe4 Qb8 48. Be5 Rc6 49. Qf4 f5 50. Qh4 Qb6 51. Qh7+ Kc8 52. Qg8+ Kb7 53. Qxe6 Qc5 54. Qd5 Qxc2+ 55. Ka1 Qe4 56. Bxd6 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.19"]
[Round "10"]
[White "Van den Berg, Carel"]
[Black "Portisch, Lajos"]
[Result "1/2-1/2"]
[ECO "C93"]
[EventDate "1964.01.08"]
[PlyCount "110"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 h6 10. d4 Re8 11. Nbd2 Bb7 12. a3 Bf8 13. Ba2 Qd7 14. b4 Rad8 15. Bb2 g6 16. Qb3 Bg7 17. Rad1 Re7 18. d5 Na7 19. c4 c6 20. dxc6 Nxc6 21. cxb5 axb5 22. Nf1 Qe8 23. Ne3 Nb8 24. Nd5 Nxd5 25. exd5 Nd7 26. Qe3 Rc8 27. Nd4 Nf6 28. Ne2 Rc2 29. Qb3 Rc4 30. Qf3 e4 31. Qg3 Rc2 32. Bxf6 Bxf6 33. Bb1 Be5 34. Qh4 Rcc7 35. Qxh6 Qa8 36. Qd2 Qxa3 37. Bxe4 Rc4 38. Bf3 Qxb4 39. Qg5 Rcc7 40. Ng3 Qf4 41. Qxf4 Bxf4 42. Rxe7 Rxe7 43. Rb1 Ba6 44. Ra1 Bc8 45. Ra8 Re1+ 46. Nf1 Re8 47. Rb8 Kg7 48. Ne3 Bd7 49. Rb7 Re7 50. Kf1 f5 51. Nc2 Be5 52. Be2 Kf6 53. Bxb5 Bxb5+ 54. Rxb5 Rc7 55. Ne3 Bd4 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.21"]
[Round "11"]
[White "De Rooi, Paul"]
[Black "Van den Berg, Carel"]
[Result "0-1"]
[ECO "D01"]
[EventDate "1964.01.08"]
[PlyCount "50"]

1. d4 Nf6 2. Nc3 d5 3. Bg5 Nbd7 4. Nf3 h6 5. Bxf6 Nxf6 6. e3 e6 7. Ne5 a6 8. Ne2 Bd6 9. Nf4 c5 10. c3 Bxe5 11. dxe5 Nd7 12. Qh5 O-O 13. Nd3 c4 14. Nb4 Qc7 15. f4 Qb6 16. Be2 a5 17. Nc2 Qxb2 18. O-O Qxc2 19. f5 exf5 20. Rad1 Nxe5 21. Rxd5 Qe4 22. Rfd1 Be6 23. Rb5 Rad8 24. Rxd8 Rxd8 25. h3 Qxe3+ 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.21"]
[Round "11"]
[White "Donner, Jan"]
[Black "Keres, Paul"]
[Result "0-1"]
[ECO "D72"]
[EventDate "1964.01.08"]
[PlyCount "62"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5 6. e4 Nb4 7. a3 N4c6 8. d5 Nd4 9. Nc3 O-O 10. Nge2 c5 11. O-O e5 12. Be3 Na6 13. Nc1 f5 14. f4 fxe4 15. Bxe4 Bf5 16. Bxf5 Nxf5 17. Bf2 exf4 18. gxf4 Qd6 19. N1e2 Rad8 20. Qd3 Bxc3 21. Nxc3 Qxf4 22. Rad1 Rfe8 23. Rfe1 Nd4 24. Kg2 Rxe1 25. Rxe1 Nc7 26. Bg3 Qf7 27. d6 Nd5 28. Rf1 Qe6 29. Re1 Qxe1 30. Nxd5 Qe2+ 31. Qxe2 Nxe2 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.21"]
[Round "11"]
[White "Dunkelblum, Arthur"]
[Black "Darga, Klaus"]
[Result "0-1"]
[ECO "D30"]
[EventDate "1964.01.08"]
[PlyCount "42"]

1. Nf3 Nf6 2. c4 e6 3. d4 d5 4. e3 Be7 5. Nbd2 O-O 6. Bd3 c5 7. O-O cxd4 8. exd4 Nc6 9. b3 dxc4 10. Nxc4 Nb4 11. Bb1 b6 12. a3 Nbd5 13. Bb2 Bb7 14. Qd2 Rc8 15. Bd3 Nh5 16. Be4 f5 17. Bc2 Ndf4 18. Ne1 Bh4 19. Ne3 Qg5 20. f3 Ba6 21. Bd3 Bxe1 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.21"]
[Round "11"]
[White "Filip, Miroslav"]
[Black "Nei, Iivo"]
[Result "1/2-1/2"]
[ECO "D30"]
[EventDate "1964.01.08"]
[PlyCount "59"]

1. Nf3 d5 2. c4 c6 3. d4 Nf6 4. e3 e6 5. Bd3 dxc4 6. Bxc4 Nbd7 7. O-O Bd6 8. Nbd2 e5 9. Bb3 Bc7 10. dxe5 Nxe5 11. Nxe5 Bxe5 12. Nc4 Bc7 13. Qxd8+ Kxd8 14. Bd2 c5 15. Rfd1 Ke7 16. e4 Be6 17. f3 b5 18. Ne3 Rhd8 19. Bxe6 fxe6 20. Bc3 Bb6 21. Kf1 a6 22. Ke2 c4 23. g3 Rxd1 24. Rxd1 Rc8 25. a3 Bc5 26. Nc2 Bb6 27. Bb4+ Bc5 28. Bc3 Bb6 29. Bb4+ Bc5 30. Bc3 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.21"]
[Round "11"]
[White "Ivkov, Borislav"]
[Black "Larsen, Bent"]
[Result "0-1"]
[ECO "B77"]
[EventDate "1964.01.08"]
[PlyCount "74"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 d6 8. f3 Nd7 9. Bb3 Nb6 10. Qd2 Na5 11. Qd3 O-O 12. O-O-O Nxb3+ 13. axb3 a5 14. Na4 Nxa4 15. bxa4 Bd7 16. Nb5 Rc8 17. h4 Bxb5 18. Qxb5 Rc6 19. c4 Qc7 20. b3 Rc5 21. Bxc5 dxc5 22. Rd5 e6 23. Qxc5 Qg3 24. Rg5 Qf4+ 25. Kc2 f5 26. exf5 exf5 27. Rd1 b6 28. Qe7 Qxh4 29. Rd7 Bf6 30. Qe6+ Kh8 31. Qd6 Qf2+ 32. Kd1 Qf1+ 33. Kc2 Qe2+ 34. Kc1 Qb2+ 35. Kd1 Qb1+ 36. Ke2 Re8+ 37. Kf2 Qe1# 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.21"]
[Round "11"]
[White "Portisch, Lajos"]
[Black "Parma, Bruno"]
[Result "1/2-1/2"]
[ECO "E11"]
[EventDate "1964.01.08"]
[PlyCount "60"]

1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Qe7 5. g3 Nc6 6. Bg2 Bxd2+ 7. Nbxd2 d6 8. O-O a5 9. e4 e5 10. d5 Nb8 11. Ne1 O-O 12. Nd3 Na6 13. f4 Bd7 14. Kh1 c6 15. fxe5 dxe5 16. Qe2 Ne8 17. Qe3 c5 18. b3 b6 19. a3 Nd6 20. b4 Nb7 21. Rab1 Qd6 22. bxa5 Nxa5 23. Rb2 Nc7 24. Nf2 Ra6 25. Bh3 Bxh3 26. Nxh3 Rfa8 27. Ng1 Nb7 28. Ne2 Ra4 29. Qb3 R4a6 30. Qe3 Ra4 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.21"]
[Round "11"]
[White "Van Scheltinga, Theodore"]
[Black "Lengyel, Levente"]
[Result "0-1"]
[ECO "A64"]
[EventDate "1964.01.08"]
[PlyCount "124"]

1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. g3 Bg7 8. Bg2 O-O 9. O-O a6 10. a4 Nbd7 11. Nd2 Re8 12. h3 Rb8 13. Nc4 Nb6 14. Na3 Na8 15. Bd2 Nc7 16. a5 Bd7 17. Nc4 Bb5 18. b3 Qe7 19. Re1 Nd7 20. Rc1 b6 21. axb6 Nxb6 22. Nxb5 axb5 23. Na5 Ra8 24. Nc6 Qd7 25. e4 b4 26. Be3 Bb2 27. Rb1 Bc3 28. Re2 f6 29. Qd3 Nc8 30. Bd2 Bxd2 31. Qxd2 Nb5 32. Re3 Kg7 33. Qd3 Nc3 34. Rf1 Ne7 35. Nxe7 Rxe7 36. f4 Qb5 37. Qxb5 Nxb5 38. Bf3 Ra3 39. Rfe1 Nd4 40. Bd1 Ra1 41. Kf2 Rc1 42. h4 Ra7 43. e5 fxe5 44. fxe5 Ra2+ 45. Kf1 dxe5 46. d6 Raa1 47. d7 Nc6 48. Bf3 Nd8 49. Rxe5 Kf6 50. Kf2 Rxe1 51. Rxe1 Rxe1 52. Kxe1 Ke7 53. Bg4 Nc6 54. Kd2 Ne5 55. Bh3 Nxd7 56. Kd3 Ne5+ 57. Ke4 c4 58. Bg2 c3 59. Ke3 Ng4+ 60. Kd3 Kd6 61. Bb7 Ke5 62. Ba6 Nh6 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.21"]
[Round "11"]
[White "Zuidema, Coenraad"]
[Black "Bobotsov, Milko"]
[Result "1/2-1/2"]
[ECO "B93"]
[EventDate "1964.01.08"]
[PlyCount "87"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 Qc7 7. Bd3 g6 8. O-O Bg7 9. Nf3 Nbd7 10. Qe1 e5 11. fxe5 dxe5 12. Qh4 O-O 13. Kh1 b5 14. Bh6 Bb7 15. Ng5 Rae8 16. Rf2 Nh5 17. Bxg7 Kxg7 18. a4 f6 19. Nh3 b4 20. Nd5 Bxd5 21. exd5 Qd6 22. Qc4 Nc5 23. Be2 Nf4 24. Nxf4 exf4 25. Rxf4 g5 26. Rd4 Re7 27. Bh5 Kh6 28. Bg4 f5 29. Rf1 Re5 30. Bd1 Rb8 31. h4 Ne4 32. hxg5+ Kxg5 33. Qd3 Rg8 34. Qe3+ Kg6 35. Bg4 fxg4 36. Rxe4 Rh5+ 37. Kg1 Qh2+ 38. Kf2 Rf8+ 39. Ke1 Rxf1+ 40. Kxf1 Rf5+ 41. Ke1 Qh1+ 42. Kd2 Qxg2+ 43. Kd3 Rf3 44. Re6+ 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.22"]
[Round "12"]
[White "Darga, Klaus"]
[Black "Portisch, Lajos"]
[Result "0-1"]
[ECO "D41"]
[EventDate "1964.01.08"]
[PlyCount "124"]

1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 Nc6 5. Bg2 d5 6. cxd5 Nxd5 7. O-O Be7 8. d4 O-O 9. Nxd5 exd5 10. dxc5 Bxc5 11. Bg5 Qb6 12. Rc1 d4 13. Nd2 Re8 14. Nb3 Bf8 15. Qd3 a5 16. Rfd1 h6 17. Bf4 Rd8 18. Bxc6 bxc6 19. Nxd4 c5 20. Qb5 Qa6 21. Qxa6 Bxa6 22. Nc6 Rxd1+ 23. Rxd1 Bxe2 24. Re1 Bb5 25. Ne7+ Kh7 26. Bd6 Bc4 27. Bxc5 Bxa2 28. Ba3 g6 29. Rc1 a4 30. Rc8 Rxc8 31. Nxc8 Bg7 32. Nd6 f5 33. Kf1 Bd4 34. Ke2 Kg7 35. f3 Bd5 36. h3 Kf6 37. Ne8+ Kf7 38. Nd6+ Ke6 39. f4 Bc6 40. g4 Bb6 41. Nc8 Bd8 42. Ke3 Bb7 43. Nd6 Bb6+ 44. Kd3 Ba6+ 45. Kc3 Bc7 46. gxf5+ gxf5 47. Ne8 Bxf4 48. Ng7+ Ke5 49. Bf8 Be2 50. Bc5 Ke4 51. Kb4 Bd1 52. Bf8 Be5 53. Ne6 Bxb2 54. Nc5+ Ke3 55. Nxa4 Bxa4 56. Kxa4 h5 57. Kb3 Be5 58. Kc4 Ke4 59. Bc5 f4 60. Bg1 f3 61. Bf2 Bf4 62. Kc3 Be3 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.22"]
[Round "12"]
[White "Ivkov, Borislav"]
[Black "Filip, Miroslav"]
[Result "1/2-1/2"]
[ECO "B17"]
[EventDate "1964.01.08"]
[PlyCount "61"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Ng3 e6 7. Bd3 c5 8. O-O cxd4 9. Nxd4 Bc5 10. c3 O-O 11. Nh5 a6 12. Re1 Be7 13. Bg5 Nxh5 14. Qxh5 g6 15. Bxe7 Qxe7 16. Qh6 Rd8 17. Rad1 Nf8 18. Rd2 Bd7 19. Be4 Be8 20. Red1 Rab8 21. Nf3 Rxd2 22. Qxd2 Nd7 23. Qf4 e5 24. Qh6 f6 25. Qe3 Bf7 26. b4 Nf8 27. a4 b6 28. Qd3 f5 29. Bd5 e4 30. Bxf7+ Qxf7 31. Qd6 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.22"]
[Round "12"]
[White "Keres, Paul"]
[Black "Dunkelblum, Arthur"]
[Result "1/2-1/2"]
[ECO "C98"]
[EventDate "1964.01.08"]
[PlyCount "78"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Nc6 13. dxc5 dxc5 14. Nf1 Rd8 15. Qe2 Rb8 16. Ne3 g6 17. Nh2 Be6 18. Nhg4 Rd6 19. a4 c4 20. axb5 axb5 21. Qf3 Nxg4 22. hxg4 Rbd8 23. g5 Na5 24. Qg3 R6d7 25. Nd5 Bxd5 26. exd5 Rxd5 27. Be3 b4 28. Qf3 bxc3 29. bxc3 Bc5 30. Be4 R5d7 31. Ra4 Bxe3 32. Qxe3 Nb3 33. g3 Nd2 34. Kg2 Nxe4 35. Qxe4 Rc8 36. Rb4 Qc5 37. Re3 Qd5 38. Kh2 Qxe4 39. Rxe4 Rd3 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.22"]
[Round "12"]
[White "Larsen, Bent"]
[Black "Bobotsov, Milko"]
[Result "0-1"]
[ECO "A03"]
[EventDate "1964.01.08"]
[PlyCount "92"]

1. f4 Nf6 2. Nf3 g6 3. e3 Bg7 4. Be2 O-O 5. O-O d5 6. d3 c5 7. Qe1 Nc6 8. Qh4 b6 9. Nbd2 Bb7 10. c3 Re8 11. d4 Rf8 12. g4 Ne4 13. Bd3 Nd6 14. Rf2 e6 15. Qh3 Qe7 16. Ng5 h6 17. Ngf3 Rac8 18. Nf1 Ne4 19. Rg2 Na5 20. Ng3 Nc4 21. f5 Ncd6 22. Ne5 Ng5 23. Qh4 Bxe5 24. Kh1 Bg7 25. Bd2 Nde4 26. Rf1 exf5 27. gxf5 Rc6 28. Bxe4 dxe4 29. d5 Rf6 30. c4 Nf3 31. Qf4 Nxd2 32. Rxd2 Bc8 33. d6 Qb7 34. Rd5 Re8 35. Rg1 Kh8 36. h4 Bd7 37. h5 g5 38. Qg4 Bc6 39. Rd2 Qd7 40. Rgd1 Bf8 41. Kg1 Re5 42. b3 Kg7 43. Rd5 Bxd5 44. cxd5 Qxd6 45. Nxe4 Rxe4 46. Qxe4 Qg3+ 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.22"]
[Round "12"]
[White "Lengyel, Levente"]
[Black "Zuidema, Coenraad"]
[Result "1-0"]
[ECO "D77"]
[EventDate "1964.01.08"]
[PlyCount "80"]

1. g3 d5 2. Nf3 Nf6 3. Bg2 g6 4. O-O Bg7 5. d4 O-O 6. c4 dxc4 7. Na3 c5 8. dxc5 Na6 9. c6 c3 10. Nd4 Nd5 11. Nab5 e5 12. Nxc3 exd4 13. Nxd5 bxc6 14. Nf4 Qb6 15. Qa4 Bb7 16. Bd2 Rab8 17. Ba5 Qb5 18. Qxb5 cxb5 19. Bxb7 Rxb7 20. Rfc1 Re8 21. Rc6 Nb8 22. Rc2 Nd7 23. Rac1 Ne5 24. b3 Bf8 25. Rc7 Reb8 26. Rd1 Bg7 27. Kg2 Rxc7 28. Bxc7 Rb7 29. Nd5 Nc6 30. Rc1 Ne5 31. f4 Ng4 32. Rc6 f5 33. h3 Nf6 34. Rxf6 Bxf6 35. Nxf6+ Kf7 36. Be5 Rb6 37. Nxh7 Ra6 38. Ng5+ Ke7 39. Bxd4 Rxa2 40. Kf2 a5 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.22"]
[Round "12"]
[White "Nei, Iivo"]
[Black "Donner, Jan"]
[Result "1-0"]
[ECO "A19"]
[EventDate "1964.01.08"]
[PlyCount "63"]

1. c4 Nf6 2. Nc3 e6 3. e4 c5 4. e5 Ng8 5. d4 cxd4 6. Qxd4 Nc6 7. Qe4 d6 8. Nf3 Qa5 9. Bd2 dxe5 10. Nb5 Bb4 11. O-O-O Bxd2+ 12. Rxd2 Nf6 13. Qh4 O-O 14. Nc3 Rd8 15. Bd3 Bd7 16. Re1 Be8 17. g4 h6 18. g5 hxg5 19. Nxg5 Nb4 20. Re3 Nxd3+ 21. Rexd3 Rxd3 22. Rxd3 Rd8 23. Rh3 Kf8 24. Qh8+ Ke7 25. Qxg7 e4 26. Rh8 Qf5 27. Qf8+ Kd7 28. Nxf7 Qf4+ 29. Kb1 Rc8 30. Qg7 Kc6 31. Rh6 Nd7 32. Rxe6+ 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.22"]
[Round "12"]
[White "Parma, Bruno"]
[Black "De Rooi, Paul"]
[Result "1-0"]
[ECO "B32"]
[EventDate "1964.01.08"]
[PlyCount "75"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 a6 6. Nd6+ Bxd6 7. Qxd6 Qf6 8. Qd2 Nge7 9. Nc3 Qg6 10. h4 b5 11. h5 Qg4 12. Qg5 Qxg5 13. Bxg5 h6 14. Be3 b4 15. Na4 Rb8 16. O-O-O f5 17. f3 Rf8 18. Nb6 fxe4 19. fxe4 a5 20. Nc4 Rf6 21. Nd6+ Kd8 22. Bc4 Nd4 23. Nf7+ Kc7 24. Nxe5 Ndc6 25. Ng4 Rf8 26. e5 Bb7 27. Bc5 Rbd8 28. Ne3 Rfe8 29. Bd6+ Kb6 30. Rhf1 Rf8 31. Bf7 Ba6 32. Rf2 Kb7 33. c3 bxc3 34. bxc3 Rh8 35. Nd5 Nxd5 36. Bxd5 Kc8 37. e6 Rde8 38. Rf7 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.22"]
[Round "12"]
[White "Van den Berg, Carel"]
[Black "Van Scheltinga, Theodore"]
[Result "1/2-1/2"]
[ECO "C90"]
[EventDate "1964.01.08"]
[PlyCount "81"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 Bg4 9. d3 Na5 10. Bc2 c5 11. Nbd2 O-O 12. h3 Bh5 13. Nf1 Nd7 14. Ng3 Bxf3 15. Qxf3 Bg5 16. Nf5 Bxc1 17. Raxc1 g6 18. Ne3 Nb6 19. Qg3 Qf6 20. Ng4 Qf4 21. Qh4 f6 22. d4 h5 23. dxc5 Nbc4 24. g3 Qg5 25. Qxg5 fxg5 26. Ne3 dxc5 27. Nxc4 Nxc4 28. Bb3 Rfd8 29. Rcd1 Kg7 30. Rd5 Rxd5 31. exd5 Nd2 32. Bd1 Kf6 33. Re2 Nc4 34. b3 Nd6 35. Bc2 Re8 36. f3 h4 37. g4 a5 38. Be4 Ra8 39. c4 bxc4 40. bxc4 Rb8 41. Bd3 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.23"]
[Round "13"]
[White "Bobotsov, Milko"]
[Black "Lengyel, Levente"]
[Result "1/2-1/2"]
[ECO "D41"]
[EventDate "1964.01.08"]
[PlyCount "60"]

1. c4 Nf6 2. Nc3 c5 3. g3 e6 4. Nf3 Nc6 5. Bg2 d5 6. cxd5 Nxd5 7. O-O Be7 8. d4 O-O 9. Nxd5 exd5 10. dxc5 Bxc5 11. a3 Be7 12. Be3 Bf6 13. Nd4 Re8 14. Rc1 Bxd4 15. Bxd4 Nxd4 16. Qxd4 Rxe2 17. Bf3 Re7 18. Qxd5 Be6 19. Qxd8+ Rxd8 20. Rfd1 Rxd1+ 21. Rxd1 g6 22. Rd2 Rc7 23. Kg2 Kg7 24. h4 h5 25. Be4 Kf6 26. Kf3 b6 27. Ke3 Re7 28. Kf4 Rc7 29. Ke3 Re7 30. Kf4 Rc7 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.23"]
[Round "13"]
[White "De Rooi, Paul"]
[Black "Darga, Klaus"]
[Result "0-1"]
[ECO "B42"]
[EventDate "1964.01.08"]
[PlyCount "120"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. O-O d6 7. c4 g6 8. Nc3 Bg7 9. Be3 O-O 10. f3 Nc6 11. Nb3 d5 12. cxd5 exd5 13. exd5 Nxd5 14. Nxd5 Qxd5 15. Be4 Qe5 16. Rf2 Bf5 17. Bxc6 Qxe3 18. Bxb7 Ra7 19. Be4 Bxe4 20. fxe4 a5 21. Qd2 Qb6 22. Rd1 a4 23. Nc1 Re7 24. Kh1 Rxe4 25. Rdf1 Bd4 26. Qc2 Rh4 27. Re2 Qd6 28. h3 Ba7 29. Rd1 Rd4 30. Rxd4 Qxd4 31. Re1 Rd8 32. b3 a3 33. Rf1 Bb8 34. Ne2 Qe5 35. g3 Qe6 36. Kg2 Ba7 37. Rf3 Re8 38. Nf4 Qb6 39. Qd1 Rd8 40. Qe1 Qd4 41. Nd3 Qd5 42. Qe7 Rd7 43. Qe8+ Kg7 44. Qe2 h5 45. h4 Rc7 46. Kh2 Qd4 47. Rf1 Rd7 48. Rd1 Rd6 49. Qd2 Bb8 50. Qf2 Qxf2+ 51. Nxf2 Re6 52. Rd2 Re3 53. Nh1 Be5 54. Kg2 Bc3 55. Rc2 Bb2 56. Kf2 Rxb3 57. Ke2 Rb6 58. Nf2 Be5 59. g4 Rb2 60. Kd3 Bd4 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.23"]
[Round "13"]
[White "Donner, Jan"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[ECO "E92"]
[EventDate "1964.01.08"]
[PlyCount "59"]

1. d4 Nf6 2. c4 c5 3. d5 d6 4. Nc3 g6 5. e4 Bg7 6. Be2 O-O 7. Nf3 e5 8. O-O Ng4 9. Ng5 Nf6 10. f4 exf4 11. Bxf4 Ne8 12. Qd2 Nd7 13. Rae1 Qe7 14. Nd1 a6 15. b3 Nc7 16. Nf2 Ne5 17. Nf3 b5 18. Nxe5 Bxe5 19. Bg4 Ne8 20. Bxc8 Rxc8 21. Nd3 Bd4+ 22. Kh1 bxc4 23. bxc4 f6 24. Nb4 cxb4 25. Qxd4 Rf7 26. Bd2 a5 27. a3 Qa7 28. Qd3 Qa6 29. axb4 axb4 30. Bxb4 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.23"]
[Round "13"]
[White "Dunkelblum, Arthur"]
[Black "Nei, Iivo"]
[Result "0-1"]
[ECO "D35"]
[EventDate "1964.01.08"]
[PlyCount "74"]

1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. Nc3 c6 5. cxd5 exd5 6. Bg5 Be7 7. e3 Bf5 8. Bd3 Bxd3 9. Qxd3 O-O 10. O-O Nbd7 11. Nd2 h6 12. Bxf6 Bxf6 13. Rab1 a5 14. Rfc1 Re8 15. Na4 Be7 16. a3 Bd6 17. Nc3 a4 18. Ne2 Nf6 19. Nf1 g6 20. Re1 Qc7 21. f3 c5 22. dxc5 Bxc5 23. Nd4 Qb6 24. Red1 Nd7 25. b4 Bxd4 26. Qxd4 Qxd4 27. Rxd4 Nb6 28. Rc1 Rac8 29. Rc5 Nc4 30. e4 b6 31. Rxc8 Rxc8 32. exd5 Nxa3 33. b5 Ra8 34. Ne3 Nxb5 35. Rb4 Nc3 36. d6 b5 37. Nc2 Rd8 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.23"]
[Round "13"]
[White "Filip, Miroslav"]
[Black "Larsen, Bent"]
[Result "1/2-1/2"]
[ECO "A90"]
[EventDate "1964.01.08"]
[PlyCount "178"]

1. c4 f5 2. d4 Nf6 3. g3 e6 4. Bg2 Bb4+ 5. Bd2 Be7 6. Nf3 O-O 7. O-O d6 8. Nc3 Qe8 9. Qc2 Qh5 10. Rad1 Nbd7 11. b4 Nb6 12. Nb5 Bd7 13. Qd3 Ne4 14. Nc3 d5 15. cxd5 exd5 16. Ne5 Be6 17. Nb5 Rfc8 18. Be1 a6 19. Na3 Qe8 20. Qb3 Qa4 21. Nc2 Bd6 22. Nd3 Bd7 23. f3 Nf6 24. Nc5 Qxb3 25. axb3 Bc6 26. Bd2 Re8 27. Rfe1 Nc8 28. Kf2 Na7 29. Bc3 Nb5 30. Bb2 Re7 31. Nd3 Nd7 32. e3 Rf8 33. Kg1 h6 34. Re2 g5 35. Ree1 Kh7 36. Bf1 h5 37. f4 Rg8 38. Ne5 Nf6 39. Bd3 Ne4 40. fxg5 Rxg5 41. Rf1 Bd7 42. Kh1 c6 43. Ne1 Be6 44. N1f3 Rg8 45. Nh4 Bxb4 46. Nxf5 Ree8 47. Rf4 Nbd6 48. Nxd6 Bxd6 49. Rdf1 Be7 50. Nf7 Rg4 51. Ne5 Rxf4 52. exf4 Bf5 53. Be2 Kh6 54. g4 hxg4 55. Nxg4+ Kh7 56. Ne3 Bc8 57. Bd3 Bf6 58. Rf3 Kg7 59. Kg2 Kf7 60. b4 Rg8+ 61. Rg3 Nxg3 62. hxg3 Bh4 63. Nf1 Be7 64. Bc3 Bd6 65. Kf3 Bg4+ 66. Kf2 Rh8 67. Be1 Bc8 68. Kg1 Kf6 69. Ne3 Rh3 70. Kf2 Rh2+ 71. Kf3 Ra2 72. g4 Ra3 73. g5+ Kf7 74. Bc2 Bg4+ 75. Kxg4 Rxe3 76. Bh4 Re2 77. Bf5 Rd2 78. Be1 Rg2+ 79. Kf3 Rb2 80. Bd7 Bxb4 81. Bh4 Rd2 82. Kg4 Rxd4 83. Kf5 Re4 84. g6+ Kf8 85. Bf6 Bd6 86. Bg5 Kg7 87. Bf6+ Kg8 88. Bg5 Bf8 89. Be6+ Rxe6 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.23"]
[Round "13"]
[White "Portisch, Lajos"]
[Black "Keres, Paul"]
[Result "1/2-1/2"]
[ECO "E18"]
[EventDate "1964.01.08"]
[PlyCount "55"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Bd2 c5 9. Ne1 Nxc3 10. Bxc3 Bxg2 11. Nxg2 cxd4 12. Qxd4 Bf6 13. Qe4 Na6 14. Rac1 Rc8 15. Rfd1 Rc7 16. Ne3 Nc5 17. Bxf6 Qxf6 18. Qd4 Qg6 19. Qf4 Rfc8 20. Rd6 Qe4 21. Rcd1 Qxf4 22. gxf4 Kf8 23. f5 Ke7 24. f3 Nb7 25. R6d4 Nc5 26. Rd6 Nb7 27. R6d4 Nc5 28. Rd6 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.23"]
[Round "13"]
[White "Van Scheltinga, Theodore"]
[Black "Parma, Bruno"]
[Result "1/2-1/2"]
[ECO "E11"]
[EventDate "1964.01.08"]
[PlyCount "80"]

1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nbd2 d5 5. e3 O-O 6. a3 Be7 7. Bd3 b6 8. e4 dxe4 9. Nxe4 Bb7 10. Qc2 Nbd7 11. O-O c5 12. Be3 Rc8 13. Rad1 Qc7 14. dxc5 Bxe4 15. Bxe4 Nxc5 16. Bxc5 bxc5 17. Bd3 Rb8 18. Qe2 Rfd8 19. Bc2 Nd7 20. Rd2 Bf6 21. Rfd1 g6 22. b3 Nb6 23. Rxd8+ Rxd8 24. Rxd8+ Qxd8 25. b4 Qd6 26. Qd3 Be7 27. b5 Qf4 28. Nd2 Bg5 29. Nb3 Qxc4 30. Qxc4 Nxc4 31. a4 Na3 32. Be4 f5 33. Bc6 c4 34. Nd4 Bf6 35. Nxe6 c3 36. Nc5 c2 37. Nd3 Bc3 38. Kf1 Kf8 39. Ke2 Ke7 40. Bd5 Kd6 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.23"]
[Round "13"]
[White "Zuidema, Coenraad"]
[Black "Van den Berg, Carel"]
[Result "1/2-1/2"]
[ECO "B82"]
[EventDate "1964.01.08"]
[PlyCount "189"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. f4 a6 7. Bd3 Nbd7 8. Qf3 Qb6 9. Nb3 Qc7 10. a4 b6 11. O-O Bb7 12. Qe2 Be7 13. Bd2 O-O 14. Rae1 e5 15. Kh1 Rfe8 16. f5 d5 17. exd5 Nxd5 18. Nxd5 Bxd5 19. c4 Bc6 20. a5 Bh4 21. Ra1 e4 22. Bc2 Bf6 23. axb6 Qxb6 24. Be3 Qc7 25. Nd4 Bb7 26. Rac1 Nc5 27. Rfd1 Rad8 28. Qf2 h6 29. b4 Nd3 30. Bxd3 exd3 31. Rxd3 Re4 32. Rcd1 Qxc4 33. Qc2 Qxc2 34. Nxc2 Rxd3 35. Rxd3 Rc4 36. Ne1 Be4 37. Rd2 Rc1 38. Rd8+ Bxd8 39. Bxc1 Bxf5 40. Nf3 Kf8 41. Nd4 Be4 42. Be3 Ke8 43. Nb3 Bd3 44. Bd4 g6 45. Kg1 h5 46. g3 Ke7 47. Kf2 Bb5 48. Ke3 Ke6 49. Na5 Kd5 50. Bc3 g5 51. Kf3 f5 52. Ke3 Ba4 53. Bd2 Bf6 54. Kd3 Bb5+ 55. Ke3 Be5 56. Kf3 g4+ 57. Ke3 h4 58. Be1 Bd7 59. Nb7 Bg7 60. Nc5 Bh6+ 61. Kf2 Bb5 62. gxh4 f4 63. Kg2 Ke5 64. Kf2 Kf5 65. Bc3 Bf8 66. Bd2 Be7 67. h5 Bh4+ 68. Kg1 Bf6 69. Be1 Bd4+ 70. Kg2 Bc6+ 71. Kf1 Be8 72. h6 Bb5+ 73. Kg2 Kg6 74. Ne6 Be3 75. Bf2 Bd2 76. Bc5 Kxh6 77. Bd6 f3+ 78. Kf2 Bc3 79. Bc5 Be5 80. Be3+ Kg6 81. h3 gxh3 82. Nf4+ Kf5 83. Nxh3 Kg4 84. Ng5 Bg3+ 85. Kg1 Be1 86. Nf7 Bxb4 87. Kf2 Bc3 88. Nh6+ Kh5 89. Kxf3 a5 90. Nf5 Kg6 91. Bd4 Bb4 92. Ne3 Kf7 93. Nc2 Bd2 94. Be3 Bc3 95. Bd4 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.25"]
[Round "14"]
[White "Darga, Klaus"]
[Black "Van Scheltinga, Theodore"]
[Result "1-0"]
[ECO "E08"]
[EventDate "1964.01.08"]
[PlyCount "59"]

1. g3 d5 2. Nf3 Nf6 3. Bg2 Nbd7 4. d4 e6 5. O-O Be7 6. c4 O-O 7. Qc2 c6 8. Bf4 dxc4 9. Qxc4 Qb6 10. Qc2 Nd5 11. Nc3 Nxf4 12. gxf4 c5 13. d5 Nf6 14. e4 Nh5 15. Qd2 Rd8 16. Rad1 Bd7 17. Rfe1 Be8 18. Qc1 Bf8 19. dxe6 fxe6 20. Bh3 Be7 21. f5 Qc7 22. fxe6 Nf4 23. Bg2 Nd3 24. Rxd3 Rxd3 25. Nd5 Qd6 26. Qc4 Rxf3 27. Bxf3 b5 28. e5 Qd8 29. Qg4 h5 30. Qh3 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.25"]
[Round "14"]
[White "Filip, Miroslav"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "D56"]
[EventDate "1964.01.08"]
[PlyCount "52"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 Be7 5. Bg5 O-O 6. e3 h6 7. Bh4 Ne4 8. Bxe7 Qxe7 9. Qc2 Nxc3 10. Qxc3 c6 11. Bd3 dxc4 12. Bxc4 b6 13. O-O Bb7 14. Be2 Rc8 15. Rac1 Nd7 16. Rfd1 c5 17. Qa3 Kf8 18. Ba6 Bxf3 19. gxf3 Rc7 20. f4 g5 21. fxg5 Qxg5+ 22. Kf1 Qh5 23. Kg1 Qg5+ 24. Kf1 Qh5 25. Kg1 Qg5+ 26. Kf1 Qh5 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.25"]
[Round "14"]
[White "Ivkov, Borislav"]
[Black "Dunkelblum, Arthur"]
[Result "1-0"]
[ECO "D43"]
[EventDate "1964.01.08"]
[PlyCount "81"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bg5 h6 5. Bxf6 Qxf6 6. Nc3 c6 7. e3 Bd6 8. Bd3 O-O 9. O-O Nd7 10. e4 dxe4 11. Nxe4 Qe7 12. Re1 Rd8 13. Qe2 b6 14. a3 Bb7 15. Rad1 Bc7 16. Bb1 Nf6 17. Qc2 g6 18. Qc1 Kg7 19. b4 Rd7 20. Nxf6 Qxf6 21. Ne5 Rdd8 22. c5 Rd5 23. f4 Rad8 24. Qe3 Bxe5 25. fxe5 Qg5 26. Qf2 R5d7 27. Re4 Ba6 28. h4 Qe7 29. Rf4 bxc5 30. bxc5 Bc4 31. h5 g5 32. Qc2 Rh8 33. Rf6 Ba6 34. Rd2 Kf8 35. Qe4 Bb7 36. Qf3 Kg7 37. Rf2 Rf8 38. Qe4 Rh8 39. Qg6+ fxg6 40. Rxg6+ Kh7 41. Rxg5# 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.25"]
[Round "14"]
[White "Keres, Paul"]
[Black "De Rooi, Paul"]
[Result "1-0"]
[ECO "B75"]
[EventDate "1964.01.08"]
[PlyCount "73"]

1. e4 c5 2. Nf3 Nc6 3. Nc3 g6 4. d4 cxd4 5. Nxd4 Bg7 6. Be3 Nf6 7. Bc4 d6 8. f3 Nd7 9. a4 Qa5 10. Nde2 Qb4 11. Bb3 Nc5 12. O-O Nxb3 13. Nd5 Qa5 14. cxb3 O-O 15. b4 Qd8 16. b5 Na5 17. Rc1 Bxb2 18. Rc2 Bg7 19. Nc7 Be6 20. Nxa8 Qxa8 21. Bd4 Bb3 22. Bxg7 Kxg7 23. Qa1+ Kg8 24. Rc3 Bc4 25. Rf2 a6 26. Nf4 Qa7 27. Qb2 axb5 28. axb5 Qd4 29. Rc1 Qe3 30. Nd5 Bxd5 31. exd5 Ra8 32. Qc3 Qg5 33. Rd1 Qf5 34. b6 Qc8 35. Rc2 Qxc3 36. Rxc3 Ra6 37. Ra1 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.25"]
[Round "14"]
[White "Larsen, Bent"]
[Black "Lengyel, Levente"]
[Result "1/2-1/2"]
[ECO "A03"]
[EventDate "1964.01.08"]
[PlyCount "60"]

1. f4 Nf6 2. Nf3 d5 3. g3 g6 4. Bg2 Bg7 5. a4 O-O 6. Na3 c5 7. d3 Nc6 8. c3 Re8 9. O-O b6 10. Bd2 a6 11. b4 cxb4 12. cxb4 Bb7 13. Rc1 Nd7 14. Qb3 a5 15. b5 Nd4 16. Nxd4 Bxd4+ 17. e3 Nc5 18. Qa2 Bf6 19. d4 Ne4 20. Rfd1 Rc8 21. Be1 Qd7 22. Qb1 Nd6 23. Qb3 Rxc1 24. Rxc1 Rc8 25. Rxc8+ Qxc8 26. Qc3 Qxc3 27. Bxc3 e6 28. Nb1 Nc4 29. Kf2 Be7 30. Ke2 Kf8 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.25"]
[Round "14"]
[White "Nei, Iivo"]
[Black "Portisch, Lajos"]
[Result "1-0"]
[ECO "C84"]
[EventDate "1964.01.08"]
[PlyCount "55"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Nc3 b5 7. Bb3 d6 8. Nd5 Bb7 9. Nxe7 Qxe7 10. Re1 Na5 11. d4 Nxb3 12. axb3 Nxe4 13. Qd3 f5 14. c4 O-O 15. cxb5 axb5 16. Rxa8 Bxa8 17. dxe5 dxe5 18. Qxb5 Re8 19. b4 Qe6 20. Qa5 Qd6 21. h3 Bd5 22. Rd1 Nf6 23. Bg5 c6 24. b5 Qc5 25. Nh4 Be6 26. Rd8 Rxd8 27. Qxd8+ Qf8 28. Bxf6 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.25"]
[Round "14"]
[White "Parma, Bruno"]
[Black "Zuidema, Coenraad"]
[Result "1/2-1/2"]
[ECO "C64"]
[EventDate "1964.01.08"]
[PlyCount "48"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. O-O Nd4 5. Nxd4 Bxd4 6. c3 Bb6 7. d4 c6 8. Ba4 d6 9. Na3 Bc7 10. f4 Qh4 11. Bd2 Nf6 12. Qe1 Qxe1 13. Raxe1 O-O 14. dxe5 dxe5 15. f5 b5 16. Bc2 Bb6+ 17. Be3 Bxe3+ 18. Rxe3 Rd8 19. h3 Rd2 20. Rf2 Rxf2 21. Kxf2 Bb7 22. Kf3 Rd8 23. Rd3 Rxd3+ 24. Bxd3 a6 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.25"]
[Round "14"]
[White "Van den Berg, Carel"]
[Black "Bobotsov, Milko"]
[Result "0-1"]
[ECO "B98"]
[EventDate "1964.01.08"]
[PlyCount "77"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 h6 8. Bh4 Be7 9. Qf3 Qc7 10. O-O-O Nbd7 11. Bg3 b5 12. e5 Bb7 13. Qe2 dxe5 14. fxe5 Nd5 15. Nxe6 fxe6 16. Nxd5 Bxd5 17. Rxd5 exd5 18. e6 Qc6 19. exd7+ Kxd7 20. Qd1 Rae8 21. Bd3 Bg5+ 22. Kb1 Rhf8 23. a4 Kc8 24. axb5 axb5 25. Qg4+ Kb7 26. Qb4 Be7 27. Qb3 Kb6 28. Rd1 Bc5 29. Qc3 Re7 30. b4 Be3 31. Qxc6+ Kxc6 32. Be2 Bf2 33. Bf3 Bxg3 34. Bxd5+ Kb6 35. hxg3 Rd8 36. Rd3 Red7 37. Be4 Rxd3 38. cxd3 Rd4 39. Kc2 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.26"]
[Round "15"]
[White "Bobotsov, Milko"]
[Black "Parma, Bruno"]
[Result "1/2-1/2"]
[ECO "A16"]
[EventDate "1964.01.08"]
[PlyCount "60"]

1. c4 c5 2. Nc3 Nf6 3. e4 Nc6 4. g3 g6 5. Bg2 Bg7 6. f4 d6 7. Nf3 O-O 8. d3 a6 9. O-O Rb8 10. Rb1 b5 11. b3 Nd4 12. Nxd4 cxd4 13. Nd5 Nxd5 14. cxd5 e6 15. dxe6 fxe6 16. b4 e5 17. Bd2 Be6 18. a3 Qd7 19. Rc1 Rbc8 20. Qe2 Rxc1 21. Rxc1 Rc8 22. Qe1 Rxc1 23. Qxc1 Qc8 24. Qxc8+ Bxc8 25. Kf2 Kf7 26. Bf3 Be6 27. g4 exf4 28. Bxf4 Be5 29. Bxe5 dxe5 30. g5 Ke7 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.26"]
[Round "15"]
[White "De Rooi, Paul"]
[Black "Nei, Iivo"]
[Result "1/2-1/2"]
[ECO "D27"]
[EventDate "1964.01.08"]
[PlyCount "34"]

1. d4 d5 2. Nf3 Nf6 3. e3 c5 4. c4 dxc4 5. Bxc4 e6 6. O-O a6 7. dxc5 Qxd1 8. Rxd1 Bxc5 9. Bd2 Ke7 10. b4 Bd6 11. a3 Nbd7 12. Nc3 b5 13. Be2 Bb7 14. a4 bxa4 15. Nxa4 Rhb8 16. Nd4 Be5 17. Be1 Nd5 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.26"]
[Round "15"]
[White "Donner, Jan"]
[Black "Larsen, Bent"]
[Result "1-0"]
[ECO "A99"]
[EventDate "1964.01.08"]
[PlyCount "97"]

1. d4 f5 2. Nf3 Nf6 3. g3 e6 4. Bg2 Be7 5. O-O O-O 6. b3 d6 7. c4 Qe8 8. Nc3 a5 9. Ba3 Na6 10. Re1 Bd7 11. Nd2 Rb8 12. e4 fxe4 13. Ndxe4 Nxe4 14. Nxe4 b5 15. Qd2 b4 16. Bb2 Qf7 17. Qe2 Qf5 18. f4 a4 19. Rad1 Rfe8 20. Nf2 a3 21. Ba1 Bf8 22. Be4 Qf7 23. Nh3 h6 24. Qd3 Red8 25. Bg6 Qf6 26. d5 e5 27. Nf2 Nc5 28. Qc2 Be8 29. Bxe8 Rxe8 30. Ng4 Qf7 31. fxe5 dxe5 32. Nxe5 Qh5 33. Qe2 Qf5 34. Qf1 Qh5 35. Kg2 Bd6 36. Qf3 Qxf3+ 37. Nxf3 Rf8 38. Nd4 Rf7 39. Ne6 Re8 40. Nxc5 Rxe1 41. Rxe1 Bxc5 42. Re2 h5 43. h4 Kh7 44. Be5 Re7 45. Kf3 Rf7+ 46. Bf4 Bd6 47. Re6 Kg8 48. Ke3 Rd7 49. Kd4 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.26"]
[Round "15"]
[White "Dunkelblum, Arthur"]
[Black "Filip, Miroslav"]
[Result "0-1"]
[ECO "D77"]
[EventDate "1964.01.08"]
[PlyCount "76"]

1. c4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d5 6. d4 dxc4 7. Na3 Nc6 8. Nxc4 Be6 9. Nce5 Bd5 10. Nxc6 Bxc6 11. Ne1 Bxg2 12. Nxg2 c6 13. Qb3 Qb6 14. Qxb6 axb6 15. Ne1 Rfd8 16. Nc2 c5 17. e3 Ne4 18. f3 Nd6 19. dxc5 bxc5 20. a3 Nc4 21. Ra2 Nd2 22. Bxd2 Rxd2 23. Rf2 Rd3 24. Re2 b5 25. Kf2 b4 26. Ne1 Rd1 27. a4 b3 28. Ra3 c4 29. a5 Rd5 30. a6 Rd6 31. Ra4 Rc6 32. Rd2 Bf6 33. f4 Raxa6 34. Rxa6 Rxa6 35. e4 c3 36. bxc3 Bxc3 37. Rd8+ Kg7 38. Rb8 Ra1 0-1

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.26"]
[Round "15"]
[White "Lengyel, Levente"]
[Black "Van den Berg, Carel"]
[Result "1-0"]
[ECO "A36"]
[EventDate "1964.01.08"]
[PlyCount "73"]

1. g3 e5 2. c4 c5 3. Bg2 Nc6 4. Nc3 Nge7 5. e3 g6 6. Nge2 Bg7 7. O-O O-O 8. b3 d6 9. Bb2 a6 10. Nd5 Nxd5 11. cxd5 Ne7 12. Rc1 b6 13. f4 Bb7 14. e4 Qd7 15. fxe5 dxe5 16. Kh1 f5 17. d3 Rf7 18. Ng1 Raf8 19. Nf3 fxe4 20. dxe4 Nc8 21. Qd3 Nd6 22. Nxe5 Rxf1+ 23. Rxf1 Rxf1+ 24. Qxf1 Qe7 25. Qa1 Nb5 26. Nd3 Nd4 27. Qf1 a5 28. Nf4 Qf7 29. Bh3 Kh8 30. Nd3 Qe8 31. Qf4 h6 32. Bxd4 Bxd4 33. Qxh6+ Kg8 34. Qf4 Ba6 35. Be6+ Kg7 36. Ne5 Qe7 37. Nf7 1-0

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.26"]
[Round "15"]
[White "Portisch, Lajos"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[ECO "D14"]
[EventDate "1964.01.08"]
[PlyCount "30"]

1. Nf3 d5 2. d4 Nf6 3. c4 c6 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 Bf5 7. e3 e6 8. Bd3 Bxd3 9. Qxd3 Bd6 10. Bxd6 Qxd6 11. O-O O-O 12. Nb5 Qe7 13. Nc3 Qd6 14. Nb5 Qe7 15. Nc3 Qd6 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.26"]
[Round "15"]
[White "Van Scheltinga, Theodore"]
[Black "Keres, Paul"]
[Result "1/2-1/2"]
[ECO "E15"]
[EventDate "1964.01.08"]
[PlyCount "37"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. Qa4 c5 6. Bg2 Bb7 7. O-O cxd4 8. Nxd4 Bxg2 9. Kxg2 Bc5 10. Nf3 O-O 11. Nc3 Nc6 12. Bg5 h6 13. Bxf6 Qxf6 14. Rad1 Rfd8 15. Qc2 Nb4 16. Qb1 Nc6 17. Qc2 Nb4 18. Qb1 Nc6 19. Qc2 1/2-1/2

[Event "26th Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1964.01.26"]
[Round "15"]
[White "Zuidema, Coenraad"]
[Black "Darga, Klaus"]
[Result "1/2-1/2"]
[ECO "B08"]
[EventDate "1964.01.08"]
[PlyCount "57"]

1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. Bc4 c6 5. Nc3 Nf6 6. e5 dxe5 7. Nxe5 O-O 8. O-O Nd5 9. Ne2 Nd7 10. Nxd7 Bxd7 11. Nf4 Bf5 12. c3 Qd6 13. Nxd5 cxd5 14. Bd3 Bxd3 15. Qxd3 Qd7 16. Bf4 Rac8 17. Rfe1 Rc4 18. Qd2 Re8 19. Re2 b5 20. a3 a5 21. Be5 b4 22. axb4 axb4 23. Bxg7 Kxg7 24. Re3 bxc3 25. bxc3 Ra4 26. Rae1 e6 27. Rf3 Rea8 28. g3 Ra1 29. Kg2 1/2-1/2
