[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.12"]
[Round "1"]
[White "Andersson, Ulf"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B87"]
[EventDate "1971.01.12"]
[PlyCount "79"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 a6 7. Bb3 b5 8. O-O Be7 9. f4 Bb7 10. f5 e5 11. Nde2 Nbd7 12. Bg5 Rc8 13. Bxf6 Nxf6 14. Qd3 Rc5 15. Rad1 O-O 16. h3 a5 17. Kh1 b4 18. Nd5 Nxd5 19. Bxd5 Bxd5 20. exd5 Bh4 21. Qe4 Qe7 22. c4 bxc3 23. Nxc3 Rb8 24. Qe2 Rb4 25. a3 Rd4 26. Rd3 h6 27. Rfd1 Qb7 28. Rxd4 exd4 29. Rxd4 Bf6 30. Re4 Bxc3 31. bxc3 Qxd5 32. f6 gxf6 33. c4 Qf5 34. Rg4+ Kf8 35. Qd2 Ke7 36. Qxh6 Rxc4 37. Qe3+ Kf8 38. Qh6+ Ke7 39. Qe3+ Kf8 40. Qh6+ 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.12"]
[Round "1"]
[White "Gligoric, Svetozar"]
[Black "Korchnoi, Viktor"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E41"]
[EventDate "1971.01.12"]
[PlyCount "67"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 Bxc3+ 7. bxc3 d6 8. e4 e5 9. d5 Ne7 10. g3 Ng6 11. h4 Qa5 12. Qb3 Bg4 13. Nh2 Bd7 14. Bg5 O-O 15. Bxf6 gxf6 16. O-O Rab8 17. Qd1 Kg7 18. Qd2 h5 19. Kh1 b5 20. cxb5 Bxb5 21. Bxb5 Rxb5 22. Qe2 Rh8 23. c4 Rb6 24. Rab1 Ne7 25. Rxb6 Qxb6 26. g4 hxg4 27. Qxg4+ Kf8 28. h5 Qb2 29. Qd7 Qb8 30. Qh3 Qc8 31. Qf3 f5 32. Rg1 f4 33. Rb1 Ng8 34. Qg4 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.12"]
[Round "1"]
[White "Hubner, Robert"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B47"]
[EventDate "1971.01.12"]
[PlyCount "189"]

1. e4 c5 2. Nf3 e6 3. Nc3 a6 4. g3 Nc6 5. Bg2 Qc7 6. O-O Nf6 7. d4 cxd4 8. Nxd4 Nxd4 9. Qxd4 Bc5 10. Qd3 d6 11. Bf4 Nd7 12. Na4 e5 13. Bd2 b5 14. Nc3 Bb7 15. Nd5 Bxd5 16. Qxd5 O-O 17. Rad1 b4 18. c3 a5 19. Kh1 Qa7 20. Qd3 Nf6 21. Qe2 Qa6 22. Qf3 bxc3 23. Bxc3 Rab8 24. Rfe1 Bb4 25. Rd2 Bxc3 26. Qxc3 Rfc8 27. Qe3 Qb6 28. Qe2 Rc6 29. Red1 h6 30. b3 Qc7 31. f3 Rb4 32. Bf1 a4 33. bxa4 Rxa4 34. Kg2 Ra3 35. Qf2 Kh7 36. Rd3 Rc2 37. R1d2 Raxa2 38. Rxd6 Qc3 39. Rxc2 Rxc2 40. Be2 Qb2 41. Kf1 Qa3 42. Rd3 Qc1+ 43. Rd1 Qb2 44. Qe3 g6 45. Qd3 Kg7 46. Ke1 Nh5 47. Rd2 Qa1+ 48. Rd1 Qa5+ 49. Kf1 Qa2 50. f4 Qb2 51. Qe3 Nf6 52. fxe5 Qxe5 53. Qd4 Qxe4 54. Qxe4 Nxe4 55. Bd3 Rd2 56. Rxd2 Nxd2+ 57. Ke2 Nb3 58. Ke3 Nc5 59. Bc4 g5 60. Kd4 Nd7 61. Bb5 Nf6 62. Be2 Kf8 63. Ke5 Ke7 64. Bd1 Ne8 65. Be2 Ng7 66. Bd1 f6+ 67. Kd5 Kf7 68. Be2 Nf5 69. Bh5+ Ke7 70. Be2 Nd6 71. Bd1 Nf7 72. Ke4 Ne5 73. Kf5 Kf7 74. Bh5+ Kg7 75. Be2 Nc6 76. Bd1 Nd4+ 77. Ke4 Nb5 78. Bh5 Nd6+ 79. Kd5 Nf5 80. Ke4 Ne7 81. Be8 Kg8 82. Bh5 Kf8 83. Kd4 Nf5+ 84. Ke4 Ng7 85. Be2 Kf7 86. Kd5 h5 87. Bd3 Ne6 88. Be2 g4 89. Ke4 Kg6 90. Bf1 Ng5+ 91. Kf4 Kf7 92. Kf5 Nf3 93. h3 Nd2 94. Bg2 Nc4 95. Kf4 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.12"]
[Round "1"]
[White "Lengyel, Levente"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E33"]
[EventDate "1971.01.12"]
[PlyCount "40"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 Nc6 5. Nf3 d6 6. a3 Bxc3+ 7. Qxc3 Qe7 8. b4 e5 9. dxe5 Nxe5 10. Nxe5 Qxe5 11. Qxe5+ dxe5 12. e3 O-O 13. Be2 Be6 14. Bb2 Nd7 15. c5 f6 16. O-O Rfd8 17. Rfd1 Nf8 18. Kf1 Bb3 19. Rxd8 Rxd8 20. Ke1 Ne6 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.12"]
[Round "1"]
[White "Mecking, Henrique"]
[Black "Langeweg, Christian"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E41"]
[EventDate "1971.01.12"]
[PlyCount "39"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 Bxc3+ 7. bxc3 d6 8. e4 e5 9. d5 Ne7 10. Nh4 h6 11. O-O g5 12. Qf3 Nfg8 13. Nf5 Nxf5 14. exf5 Nf6 15. Qe2 Kd7 16. f3 Qa5 17. Qc2 Kc7 18. Bd2 Bd7 19. Rae1 Rag8 20. g4 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.12"]
[Round "1"]
[White "Najdorf, Miguel"]
[Black "Kuijpers, Franciscus"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D95"]
[EventDate "1971.01.12"]
[PlyCount "54"]

1. d4 d5 2. c4 c6 3. e3 Nf6 4. Nc3 g6 5. Nf3 Bg7 6. Bd2 O-O 7. Qb3 e6 8. Bd3 Nbd7 9. O-O Re8 10. Rfd1 a6 11. Rac1 Qe7 12. e4 dxe4 13. Nxe4 Nxe4 14. Bxe4 c5 15. d5 exd5 16. Bxd5 Nf6 17. Bg5 Qc7 18. Re1 Bg4 19. Nd2 Nxd5 20. cxd5 b5 21. Ne4 c4 22. Qa3 Qb6 23. d6 Re6 24. d7 f6 25. Qg3 Bf5 26. Be3 Qc6 27. Nc5 Re5 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.12"]
[Round "1"]
[White "Olafsson, Fridrik"]
[Black "Hort, Vlastimil"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D70"]
[EventDate "1971.01.12"]
[PlyCount "52"]

1. Nf3 g6 2. d4 Nf6 3. c4 d5 4. cxd5 Nxd5 5. e4 Nb6 6. h3 Bg7 7. Nc3 O-O 8. Be2 Nc6 9. d5 Ne5 10. Nxe5 Bxe5 11. Bh6 Re8 12. a4 a5 13. O-O e6 14. f4 Bg7 15. Bxg7 Kxg7 16. Bb5 Bd7 17. dxe6 Rxe6 18. Qd4+ f6 19. Rfd1 Rd6 20. Qc5 Bxb5 21. Qxb5 Qe7 22. Re1 Rd4 23. Nd5 Qd6 24. Rac1 Nxd5 25. exd5 Rd8 26. Qxb7 Rd7 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.12"]
[Round "1"]
[White "Van den Berg, Carel"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B06"]
[EventDate "1971.01.12"]
[PlyCount "57"]

1. e4 g6 2. d4 Bg7 3. c3 d5 4. Nd2 dxe4 5. Nxe4 Nd7 6. Bc4 Ndf6 7. Ng5 e6 8. N1f3 Ne7 9. Qe2 O-O 10. O-O Ned5 11. Bb3 b6 12. c4 Ne7 13. Rd1 Bb7 14. Ne5 Qc8 15. Ngf3 h6 16. h3 Rd8 17. Bf4 Nd7 18. Rd2 Nxe5 19. Nxe5 c5 20. Rad1 cxd4 21. Rxd4 Rxd4 22. Rxd4 Nc6 23. Rd6 Nxe5 24. Bxe5 Qc5 25. Bg3 e5 26. Rd2 Rc8 27. Kh2 a5 28. Qd3 Bf8 29. f3 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.13"]
[Round "2"]
[White "Donner, Jan"]
[Black "Hort, Vlastimil"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D72"]
[EventDate "1971.01.12"]
[PlyCount "56"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5 6. e4 Nb6 7. Ne2 e5 8. d5 O-O 9. O-O Nc4 10. b3 Nd6 11. Bb2 Re8 12. Nd2 Na6 13. f4 Bd7 14. Bxe5 Bxe5 15. fxe5 Rxe5 16. Nc3 Qe7 17. Qe1 Nb4 18. Qf2 f5 19. Nf3 Rxe4 20. Nxe4 Nxe4 21. Qb2 Qc5+ 22. Qd4 Qxd4+ 23. Nxd4 Nxd5 24. Rfe1 c5 25. Nf3 Re8 26. Nd2 Ndf6 27. Rad1 Bc6 28. Nc4 b6 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.13"]
[Round "2"]
[White "Ivkov, Borislav"]
[Black "Najdorf, Miguel"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E19"]
[EventDate "1971.01.12"]
[PlyCount "115"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d4 Ne4 8. Qc2 Nxc3 9. Qxc3 c5 10. Rd1 d6 11. b3 Bf6 12. Bb2 Qe7 13. Qd2 Nc6 14. d5 exd5 15. Bxf6 Qxf6 16. Qxd5 Rad8 17. Qg5 Qe7 18. Rd2 h6 19. Qh5 Na5 20. Rad1 Rfe8 21. Ne1 Bxg2 22. Nxg2 Nc6 23. Nf4 Qe5 24. e3 Qe7 25. Nd5 Qd7 26. Nc3 Re6 27. Nd5 Re5 28. Qf3 Ree8 29. Qg2 Ne5 30. Kh1 f5 31. Nc3 Nf7 32. Nb5 a6 33. Nc3 b5 34. Qf1 b4 35. Nd5 a5 36. Qg2 Re4 37. h3 Rde8 38. Ra1 Qd8 39. a4 Kh8 40. Qf3 Qd7 41. Rad1 Kg8 42. Rg1 Ng5 43. Qg2 Nf7 44. Re2 Kh7 45. f4 Nd8 46. g4 fxg4 47. Qxg4 Qxg4 48. Rxg4 Ne6 49. Reg2 Rf8 50. Rg6 Rf7 51. R2g3 Kh8 52. Kg2 Kh7 53. h4 Rf5 54. Kf3 Ree5 55. Ke2 Rxf4 56. Rxe6 Rxh4 57. Reg6 Re7 58. Nxe7 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.13"]
[Round "2"]
[White "Korchnoi, Viktor"]
[Black "Andersson, Ulf"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E01"]
[EventDate "1971.01.12"]
[PlyCount "146"]

1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Nd2 c5 5. dxc5 Na6 6. Bg2 O-O 7. Ngf3 Nxc5 8. O-O d5 9. cxd5 exd5 10. a3 Bxd2 11. Bxd2 Re8 12. Be3 Nce4 13. Rc1 Be6 14. Bd4 Nd6 15. Re1 Nfe4 16. Qb3 Qe7 17. Red1 Nf5 18. Rc2 b6 19. Rdc1 Red8 20. e3 Qe8 21. Bf1 Rac8 22. Ba6 Rxc2 23. Qxc2 h6 24. Ne5 Ned6 25. Qc7 f6 26. Nf3 Rd7 27. Qc2 Qh5 28. Be2 Qf7 29. a4 Rd8 30. Qb3 Nc4 31. Qa2 Qe7 32. b3 Na5 33. Rc3 Nd6 34. Qa3 Rc8 35. Ba6 Rc7 36. Nd2 Kf7 37. Qc1 Rxc3 38. Qxc3 Qd7 39. Bd3 Nc6 40. Bf1 Qc8 41. Nf3 Nxd4 42. Qxd4 Qc1 43. Qd2 Qxd2 44. Nxd2 d4 45. e4 f5 46. exf5 Bxf5 47. Bg2 Ke6 48. Ba8 Bc2 49. Nf3 d3 50. Kf1 Bd1 51. Nd4+ Ke5 52. Nc6+ Kf6 53. Ke1 Bxb3 54. Nb4 Bxa4 55. Nxd3 Bc2 56. Kd2 Bxd3 57. Kxd3 Ne8 58. Bc6 Nc7 59. f4 Ke6 60. h4 Nd5 61. Ba4 Nf6 62. Bd1 Kf5 63. Ke3 b5 64. Kf3 h5 65. Be2 b4 66. Ba6 Ke6 67. Bc4+ Kd6 68. Ke3 Kc5 69. Bb3 a5 70. Kd3 Kb5 71. Kd4 a4 72. Bc4+ Ka5 73. Bd3 a3 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.13"]
[Round "2"]
[White "Kuijpers, Franciscus"]
[Black "Mecking, Henrique"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B48"]
[EventDate "1971.01.12"]
[PlyCount "69"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Bd3 Nf6 8. O-O Ne5 9. h3 b5 10. f4 Nc4 11. Bxc4 Qxc4 12. Qd3 d5 13. e5 Nd7 14. a4 b4 15. Na2 Bb7 16. Qd2 Be7 17. b3 Qc7 18. Nxb4 O-O 19. Nd3 Nc5 20. Nxc5 Bxc5 21. Rfc1 Rac8 22. c3 Rfe8 23. b4 Bxd4 24. Bxd4 Bc6 25. Rc2 Qd7 26. Rca2 Ra8 27. Kh2 Reb8 28. Qd3 Rc8 29. g4 g6 30. f5 Kh8 31. f6 g5 32. Kg3 Rg8 33. b5 Bb7 34. Rh1 Rg6 35. h4 {Time} 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.13"]
[Round "2"]
[White "Langeweg, Christian"]
[Black "Olafsson, Fridrik"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E60"]
[EventDate "1971.01.12"]
[PlyCount "104"]

1. Nf3 Nf6 2. c4 g6 3. b3 Bg7 4. Bb2 O-O 5. g3 c5 6. Bg2 d6 7. d4 Ne4 8. O-O Nc6 9. e3 Bg4 10. Qc1 Nb4 11. Ne1 Nf6 12. Bxb7 Rb8 13. Bf3 Nd3 14. Nxd3 Bxf3 15. Qc2 cxd4 16. exd4 e6 17. Nd2 Ba8 18. Rae1 Qa5 19. f3 Rfc8 20. Bc3 Qb6 21. Nf2 h5 22. Qd3 Qa6 23. a4 Nd5 24. Ba1 Nb4 25. Qc3 Nc6 26. Qe3 Nb4 27. Rc1 Qb6 28. c5 Qc6 29. Rc4 Nd5 30. Qe2 Qa6 31. Nfe4 Nc3 32. Bxc3 d5 33. Nd6 dxc4 34. Nxc8 Rxc8 35. Qxc4 Qc6 36. Ne4 Rb8 37. Nd6 Qd7 38. Nb5 a6 39. Nd6 Bd5 40. Qxa6 Rxb3 41. Ba1 Kh7 42. Qc8 Qxc8 43. Nxc8 Ra3 44. Bb2 Rxa4 45. Nb6 Ra2 46. Bc3 Bc6 47. d5 exd5 48. Bxg7 Kxg7 49. Rf2 Ra1+ 50. Rf1 Ra3 51. Rc1 d4 52. Nc4 Rc3 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.13"]
[Round "2"]
[White "Petrosian, Tigran"]
[Black "Gligoric, Svetozar"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A15"]
[EventDate "1971.01.12"]
[PlyCount "32"]

1. Nf3 Nf6 2. c4 g6 3. b4 Bg7 4. Bb2 O-O 5. e3 c6 6. Be2 a5 7. b5 cxb5 8. cxb5 d6 9. Nc3 Nbd7 10. Na4 Nb6 11. Nxb6 Qxb6 12. Qa4 Bd7 13. Bd4 Qc7 14. O-O Rfc8 15. h3 Qd8 16. Bb2 e5 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.13"]
[Round "2"]
[White "Ree, Hans"]
[Black "Lengyel, Levente"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "C95"]
[EventDate "1971.01.12"]
[PlyCount "56"]

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 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. Bc2 Re8 13. Nf1 Bf8 14. Ng3 g6 15. Bg5 h6 16. Bd2 c5 17. d5 Nb6 18. Nh2 Bg7 19. Qf3 Bc8 20. Ngf1 Ra7 21. Ne3 Kh7 22. Nhg4 h5 23. Nxf6+ Qxf6 24. Qxf6 Bxf6 25. a4 Rb7 26. axb5 axb5 27. Ra5 Bd7 28. Rea1 c4 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.13"]
[Round "2"]
[White "Van den Berg, Carel"]
[Black "Hubner, Robert"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A41"]
[EventDate "1971.01.12"]
[PlyCount "112"]

1. d4 g6 2. c4 Bg7 3. Nf3 d6 4. Nc3 Bg4 5. e3 Nd7 6. Be2 c6 7. O-O Ngf6 8. b3 O-O 9. a4 a5 10. Ba3 Nb8 11. Ne1 Bxe2 12. Qxe2 Re8 13. Nc2 Qc7 14. Rfd1 Na6 15. e4 Rad8 16. Rab1 Nd7 17. Qd2 Nf8 18. Bb2 Ne6 19. Ne2 d5 20. exd5 cxd5 21. c5 Ra8 22. Na3 Nb4 23. Nb5 Qd7 24. Rbc1 Bf6 25. Rc3 Ng5 26. f3 Ne6 27. Qe1 Ng7 28. f4 Rac8 29. Qf2 h5 30. Nc1 Qg4 31. Qf3 Qf5 32. Nd3 Ne6 33. Nxb4 axb4 34. Rcc1 Nxf4 35. Kh1 Qe4 36. Qf1 Bg5 37. Re1 Qd3 38. g3 Qxf1+ 39. Rxf1 Ne6 40. Rcd1 Nd8 41. h4 Bh6 42. a5 Nc6 43. Ra1 Nb8 44. Na7 Rc7 45. Bc1 Bxc1 46. Rfxc1 Rd8 47. Ra2 f6 48. Ra4 Na6 49. Nb5 Rcc8 50. Na7 Ra8 51. Nb5 Rdc8 52. Kg2 Kf7 53. Ra2 Nb8 54. Kf3 Nc6 55. Rca1 Ra6 56. Ke3 Ke6 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.14"]
[Round "3"]
[White "Andersson, Ulf"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "C07"]
[EventDate "1971.01.12"]
[PlyCount "75"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. Ngf3 Nf6 5. exd5 Qxd5 6. Bc4 Qc6 7. a4 Qc7 8. O-O cxd4 9. Nxd4 Bd7 10. Qe2 Nc6 11. N2f3 a6 12. h3 Nxd4 13. Nxd4 Be7 14. b3 O-O 15. Bb2 Rfe8 16. Rad1 Rad8 17. Nf3 Bc8 18. Ne5 Rxd1 19. Rxd1 Rd8 20. Rxd8+ Qxd8 21. Bd3 Qc7 22. Qf3 Bd7 23. Nxd7 Nxd7 24. Qe4 g6 25. Qc4 Qxc4 26. Bxc4 Kf8 27. Be2 Nb8 28. Bf3 Nc6 29. Bc3 Ke8 30. Kf1 Kd8 31. Ke2 Kc7 32. g3 Bc5 33. Bg2 b6 34. f4 h5 35. g4 hxg4 36. hxg4 f5 37. gxf5 gxf5 38. Bd2 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.14"]
[Round "3"]
[White "Gligoric, Svetozar"]
[Black "Van den Berg, Carel"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E52"]
[EventDate "1971.01.12"]
[PlyCount "45"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 b6 7. O-O Bb7 8. a3 Bd6 9. b4 dxc4 10. Bxc4 Nbd7 11. Bb2 a5 12. bxa5 Rxa5 13. Nb5 Be7 14. a4 Ne4 15. Bd3 Nd6 16. Qe2 Nf6 17. Rfc1 Nxb5 18. Bxb5 c5 19. Ne5 Qd5 20. f3 cxd4 21. Bxd4 Bc5 22. Bxc5 bxc5 23. Qb2 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.14"]
[Round "3"]
[White "Hort, Vlastimil"]
[Black "Langeweg, Christian"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D59"]
[EventDate "1971.01.12"]
[PlyCount "141"]

1. c4 Nf6 2. Nf3 e6 3. Nc3 d5 4. d4 Be7 5. Bg5 O-O 6. e3 h6 7. Bh4 b6 8. cxd5 Nxd5 9. Bxe7 Qxe7 10. Nxd5 exd5 11. Qb3 Be6 12. Rc1 Rc8 13. Be2 c5 14. Qa3 Qf8 15. dxc5 bxc5 16. O-O Nd7 17. Rfd1 Rcb8 18. Rd2 a5 19. Ne1 Nf6 20. Bf3 c4 21. Qc3 Qb4 22. Qd4 Ra6 23. h3 Rab6 24. g4 Qe7 25. Rcc2 Rb5 26. Bg2 a4 27. a3 Rb3 28. Bf3 R3b5 29. Ng2 g5 30. Re2 Rb3 31. Ne1 R8b5 32. Bg2 Ne8 33. f4 Nc7 34. f5 Bd7 35. Kf2 Qc5 36. Nf3 Ne8 37. Qxc5 Rxc5 38. Ne5 Bb5 39. Red2 Nf6 40. Bf3 Ba6 41. Nd3 Ra5 42. Nb4 Bb7 43. Rc3 Kf8 44. Ke2 Rb5 45. Rcc2 Rc5 46. Na2 Bc6 47. Nc3 Ke7 48. Kf2 Ra5 49. Bg2 Rc5 50. Rd1 Rb7 51. Rcd2 Rb3 52. Bf3 Rb7 53. Re1 Rb6 54. Ke2 Kf8 55. Bg2 Ra5 56. Kd1 Rb8 57. Ree2 Rc5 58. Rd4 Rb3 59. Red2 Kg7 60. Bf3 Kf8 61. Ke1 Rb8 62. Kf2 Kg7 63. Bd1 Ra8 64. Bc2 Ra7 65. e4 dxe4 66. Ke3 h5 67. Bd1 hxg4 68. hxg4 Rb7 69. Rd6 Rd7 70. Be2 Rxd6 71. Rxd6 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.14"]
[Round "3"]
[White "Hubner, Robert"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B92"]
[EventDate "1971.01.12"]
[PlyCount "50"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. O-O O-O 9. Be3 Qc7 10. a4 Be6 11. a5 Nbd7 12. Nd5 Nxd5 13. exd5 Bf5 14. c4 Bg6 15. Nd2 f5 16. f3 Bf6 17. Ra2 Qd8 18. b4 Bg5 19. Qb3 Bxe3+ 20. Qxe3 Nf6 21. Nb3 Qd7 22. Rd1 Bf7 23. Nd2 Rae8 24. Re1 Bg6 25. Bd1 Qd8 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.14"]
[Round "3"]
[White "Lengyel, Levente"]
[Black "Korchnoi, Viktor"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A63"]
[EventDate "1971.01.12"]
[PlyCount "84"]

1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. g3 Bg7 8. Bg2 O-O 9. O-O a6 10. a4 Nbd7 11. Nd2 Qc7 12. Nc4 Nb6 13. Na3 Bd7 14. a5 Nc8 15. Nc4 Bb5 16. Qb3 Bxc4 17. Qxc4 b5 18. axb6 Nxb6 19. Qd3 Nfd7 20. Qc2 Rfe8 21. Ra2 Nf6 22. h3 Reb8 23. Kh2 Nc4 24. e4 Ne8 25. f4 Ra7 26. Re1 Na5 27. e5 Nb3 28. e6 f5 29. Be3 Qe7 30. Bf1 Nc7 31. Bc4 Rab7 32. Ne2 Rb6 33. Rd1 Qd8 34. Rd3 Na1 35. Rxa1 Rxb2 36. Qd1 Rxe2+ 37. Qxe2 Bxa1 38. Bxc5 Rb2 39. Rd2 Rxd2 40. Qxd2 dxc5 41. d6 Nxe6 42. Bxe6+ Kg7 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.14"]
[Round "3"]
[White "Mecking, Henrique"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A90"]
[EventDate "1971.01.12"]
[PlyCount "81"]

1. d4 e6 2. c4 f5 3. Nf3 Nf6 4. g3 d5 5. Bg2 c6 6. O-O Bd6 7. b3 Qe7 8. Bb2 O-O 9. Nbd2 Bd7 10. Ne5 Be8 11. Qc2 Nbd7 12. e3 Ne4 13. Nxd7 Qxd7 14. Nxe4 fxe4 15. f3 exf3 16. Bxf3 Bg6 17. Qe2 Rf7 18. Bg2 Raf8 19. Rxf7 Qxf7 20. Rf1 Qe8 21. Rxf8+ Qxf8 22. e4 dxe4 23. Bxe4 Qf6 24. Kg2 Kf7 25. Bc3 Bxe4+ 26. Qxe4 Qf5 27. Qe2 Be7 28. Be1 Bf6 29. Bf2 a6 30. h3 h6 31. Bg1 Ke7 32. Bf2 Kd7 33. Bg1 Qb1 34. Bf2 Qf5 35. Bg1 Qa5 36. Bf2 Qc3 37. Qh5 Ke7 38. Qc5+ Kd7 39. Qf8 Bxd4 40. Qf7+ Kd6 41. Qf8+ 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.14"]
[Round "3"]
[White "Najdorf, Miguel"]
[Black "Ree, Hans"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A77"]
[EventDate "1971.01.12"]
[PlyCount "90"]

1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2 Nbd7 11. a4 Ne5 12. Qc2 g5 13. Nc4 Nxc4 14. Bxc4 Ng4 15. Ne2 a6 16. Ra3 Qe7 17. Rg3 h6 18. f4 Qxe4 19. Bd3 Qb4 20. fxg5 hxg5 21. Bxg5 Qxb2 22. Qxb2 Bxb2 23. Rf4 Re3 24. Rxe3 Nxe3 25. Re4 Nxd5 26. Re8+ Kg7 27. Ng3 f6 28. Bd2 Kf7 29. Rh8 Bf5 30. Rxa8 Bxd3 31. Ra7 Bd4+ 32. Kh1 c4 33. Rxb7+ Ke6 34. h4 c3 35. Bc1 c2 36. Rb3 Nc3 37. h5 Be5 38. h6 d5 39. Rb6+ Kf7 40. Rb7+ Kg8 41. Nh5 Ne2 42. Ba3 d4 43. Rb6 Kf7 44. Rb7+ Kg8 45. Rb6 c1=Q+ 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.14"]
[Round "3"]
[White "Olafsson, Fridrik"]
[Black "Kuijpers, Franciscus"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E05"]
[EventDate "1971.01.12"]
[PlyCount "97"]

1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O O-O 6. d4 dxc4 7. Qc2 a6 8. Qxc4 b5 9. Qc2 Bb7 10. Bf4 Nd5 11. Nc3 Nxf4 12. gxf4 Nd7 13. Rad1 Qc8 14. f5 exf5 15. Qxf5 Nf6 16. Qxc8 Raxc8 17. Ne5 Bxg2 18. Kxg2 c6 19. f4 Rfd8 20. Kf3 Ne8 21. e3 f6 22. Nd3 g6 23. Ne4 f5 24. Nec5 Bxc5 25. Nxc5 Nc7 26. Rc1 Rd6 27. Rc2 Nd5 28. a3 a5 29. Nd3 Kf7 30. Ne5+ Ke6 31. h4 Ne7 32. h5 Kf6 33. Rh1 Rdd8 34. Rhc1 Rd6 35. Rh2 Rdd8 36. Rhc2 Rd6 37. Rg2 Kg7 38. b3 Rc7 39. Rh2 Rd8 40. hxg6 hxg6 41. Rch1 Kf6 42. Rh7 Rcc8 43. Rf7+ Ke6 44. Rhh7 Nd5 45. Nd3 Nb6 46. Re7+ Kd5 47. Nc5 Rb8 48. Re5+ Kd6 49. e4 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.15"]
[Round "4"]
[White "Donner, Jan"]
[Black "Langeweg, Christian"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E41"]
[EventDate "1971.01.12"]
[PlyCount "88"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 Bxc3+ 7. bxc3 d6 8. e4 e5 9. d5 Ne7 10. Nh4 h6 11. f3 g5 12. Nf5 Nxf5 13. exf5 Nh5 14. g3 Ng7 15. Qc2 Bd7 16. Kf2 Qf6 17. g4 O-O-O 18. Be3 Qe7 19. h4 f6 20. Rh3 Rdf8 21. Rah1 Rhg8 22. hxg5 hxg5 23. Rh7 Qd8 24. Kg2 Kb8 25. Qb2 Be8 26. Bc2 Qa5 27. R1h6 Qd8 28. Qa3 Rf7 29. Qc1 Qa5 30. Bb3 Qd8 31. Qc2 Qe7 32. Qd1 Nxf5 33. Rxf7 Nxe3+ 34. Kg3 Bxf7 35. Qd3 f5 36. gxf5 g4 37. Qxe3 gxf3+ 38. Kxf3 e4+ 39. Ke2 Qe5 40. Bc2 Rg2+ 41. Kd1 Qxf5 42. Kc1 Qf1+ 43. Kb2 Qd3 44. Qc1 Qxc4 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.15"]
[Round "4"]
[White "Hubner, Robert"]
[Black "Gligoric, Svetozar"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E66"]
[EventDate "1971.01.12"]
[PlyCount "59"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 c5 5. O-O Nc6 6. d4 O-O 7. Nc3 d6 8. d5 Na5 9. Nd2 e5 10. a3 b6 11. b4 Nb7 12. Nb3 Ne8 13. e4 f5 14. exf5 gxf5 15. Bd2 Bd7 16. Qe2 Nf6 17. b5 Be8 18. a4 a5 19. bxa6 Rxa6 20. Nb5 Bh5 21. Qe1 Ne4 22. Bc1 Nf6 23. Bb2 f4 24. f3 Bg6 25. gxf4 exf4 26. Qd2 Nh5 27. Rfe1 Qd7 28. Bxg7 Nxg7 29. a5 bxa5 30. Nxa5 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.15"]
[Round "4"]
[White "Ivkov, Borislav"]
[Black "Olafsson, Fridrik"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A22"]
[EventDate "1971.01.12"]
[PlyCount "39"]

1. c4 e5 2. Nc3 Nf6 3. g3 Bb4 4. Bg2 O-O 5. e4 Bxc3 6. bxc3 c6 7. Ne2 d5 8. cxd5 cxd5 9. exd5 Nxd5 10. O-O Nc6 11. Rb1 Nb6 12. d4 Be6 13. Qd2 Bd5 14. dxe5 Nxe5 15. Bxd5 Nxd5 16. Kh1 Qa5 17. c4 Qxd2 18. Bxd2 Nxc4 19. Rxb7 Rfe8 20. Be3 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.15"]
[Round "4"]
[White "Korchnoi, Viktor"]
[Black "Najdorf, Miguel"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D41"]
[EventDate "1971.01.12"]
[PlyCount "79"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4 8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Bc4 b6 12. O-O Bb7 13. Rfe1 Nd7 14. Rad1 Rc8 15. Bd3 Re8 16. Qe3 Rc3 17. e5 Qc7 18. Ng5 Nf8 19. Ne4 Bxe4 20. Qxe4 Rd8 21. h4 Qe7 22. Qg4 Ra3 23. Bc4 b5 24. Bb3 a5 25. d5 a4 26. dxe6 axb3 27. exf7+ Kh8 28. Rxd8 Qxd8 29. axb3 Qe7 30. e6 Ra6 31. f4 h6 32. f5 Nh7 33. Rc1 Ra8 34. Qf4 Nf6 35. Qc7 Qb4 36. Qc8+ Kh7 37. Qxa8 Qd4+ 38. Kf1 Qf4+ 39. Ke2 Qe5+ 40. Kd1 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.15"]
[Round "4"]
[White "Kuijpers, Franciscus"]
[Black "Hort, Vlastimil"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B09"]
[EventDate "1971.01.12"]
[PlyCount "114"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O 6. Bd3 Nc6 7. e5 dxe5 8. fxe5 Ng4 9. h3 Nh6 10. Be3 f6 11. Qd2 Nf7 12. exf6 exf6 13. O-O-O Ne7 14. Kb1 Be6 15. Rhe1 Nd5 16. Nxd5 Bxd5 17. h4 Re8 18. h5 f5 19. hxg6 hxg6 20. Qf2 Qf6 21. Bf4 Bxf3 22. gxf3 Qxd4 23. Qxd4 Bxd4 24. Bxc7 Kg7 25. Bg3 Rxe1 26. Rxe1 Rh8 27. c3 Bf6 28. Rg1 Ng5 29. f4 Ne4 30. Bxe4 fxe4 31. Kc2 Kf7 32. Rg2 Rh3 33. Kd2 a6 34. Bf2 b5 35. Ke2 Rf3 36. Be3 Rh3 37. a3 a5 38. Kd2 a4 39. Bg1 Rd3+ 40. Ke2 Rh3 41. Kd2 Rf3 42. Be3 Be7 43. Rh2 Kf6 44. Ke2 Bd6 45. Rh8 Kf5 46. Rc8 Bxf4 47. Rc5+ Kg4 48. Bxf4 Kxf4 49. Rxb5 Rh3 50. Rb6 Rh2+ 51. Kf1 g5 52. Rf6+ Ke3 53. Rg6 g4 54. Kg1 Rxb2 55. Rxg4 Kf3 56. Rg8 Rb1+ 57. Kh2 e3 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.15"]
[Round "4"]
[White "Petrosian, Tigran"]
[Black "Lengyel, Levente"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E14"]
[EventDate "1971.01.12"]
[PlyCount "34"]

1. d4 Nf6 2. Nf3 e6 3. e3 b6 4. Bd3 Bb7 5. O-O d5 6. b3 Bd6 7. c4 O-O 8. Bb2 Nbd7 9. Nc3 a6 10. Rc1 Qe7 11. Re1 Ne4 12. Qc2 f5 13. cxd5 exd5 14. Ne2 c6 15. Ng3 Rf6 16. Qe2 a5 17. Nh4 Qe6 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.15"]
[Round "4"]
[White "Ree, Hans"]
[Black "Mecking, Henrique"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B48"]
[EventDate "1971.01.12"]
[PlyCount "72"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Bd3 b5 8. Nxc6 Qxc6 9. Qe2 b4 10. Nd1 Bb7 11. O-O Nf6 12. f3 d5 13. e5 Nd7 14. f4 Be7 15. Rf3 Nc5 16. Nf2 Nxd3 17. Qxd3 Rc8 18. Rc1 Qc4 19. Bd4 O-O 20. Qd2 Bc5 21. Bxc5 Rxc5 22. Rg3 Rc6 23. b3 Qc5 24. Kh1 Rfc8 25. Nd3 Qd4 26. Qxb4 Qxb4 27. Nxb4 Rc5 28. c3 a5 29. Nd3 Rxc3 30. Rxc3 Rxc3 31. Kg1 d4 32. Ne1 Rc1 33. Kf2 Ba6 34. b4 a4 35. a3 Rd1 36. Nf3 Rf1# 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.15"]
[Round "4"]
[White "Van den Berg, Carel"]
[Black "Andersson, Ulf"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E67"]
[EventDate "1971.01.12"]
[PlyCount "50"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nbd7 7. O-O e5 8. Qc2 Re8 9. Rd1 c6 10. b3 Qa5 11. e4 a6 12. d5 Qc7 13. Ne1 Rb8 14. Bd2 h5 15. a4 h4 16. a5 hxg3 17. hxg3 Ng4 18. Na4 Rf8 19. f3 Ngf6 20. b4 Nh5 21. Kh2 f5 22. c5 cxd5 23. exd5 e4 24. Ra3 Ne5 25. Nb6 Bf6 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.17"]
[Round "5"]
[White "Andersson, Ulf"]
[Black "Hubner, Robert"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "C04"]
[EventDate "1971.01.12"]
[PlyCount "46"]

1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. Ngf3 Nf6 5. e5 Nd7 6. Nb3 Be7 7. Bb5 O-O 8. Bf4 a6 9. Bxc6 bxc6 10. Na5 c5 11. Nc6 Qe8 12. c3 Nb6 13. Nxe7+ Qxe7 14. O-O f5 15. exf6 gxf6 16. Re1 Nc4 17. Nh4 Nxb2 18. Qf3 Qf7 19. Bh6 Rd8 20. Re5 Nc4 21. Rh5 cxd4 22. cxd4 Bd7 23. Re1 Rab8 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.17"]
[Round "5"]
[White "Gligoric, Svetozar"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E52"]
[EventDate "1971.01.12"]
[PlyCount "52"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 b6 7. O-O Bb7 8. a3 Be7 9. cxd5 exd5 10. b4 Ne4 11. Bb2 Nxc3 12. Bxc3 Bd6 13. Qc2 g6 14. b5 c5 15. bxc6 Nxc6 16. Qb2 Qe7 17. Rfb1 Rab8 18. Ne5 Rfc8 19. Nxc6 Bxc6 20. Bb4 Ba4 21. Bxd6 Qxd6 22. Qb4 Qd7 23. Rc1 Rc6 24. Bf1 Rc2 25. Rxc2 Bxc2 26. Rc1 Rc8 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.17"]
[Round "5"]
[White "Hort, Vlastimil"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "C18"]
[EventDate "1971.01.12"]
[PlyCount "34"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 Qc7 8. Qxg7 Rg8 9. Qxh7 cxd4 10. Ne2 Nbc6 11. f4 Bd7 12. Qd3 dxc3 13. Nxc3 a6 14. h4 Nf5 15. Rh3 O-O-O 16. Rb1 Na5 17. h5 Bc6 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.17"]
[Round "5"]
[White "Langeweg, Christian"]
[Black "Kuijpers, Franciscus"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D94"]
[EventDate "1971.01.12"]
[PlyCount "59"]

1. Nf3 d5 2. c4 c6 3. e3 Nf6 4. Nc3 g6 5. d4 Bg7 6. Be2 O-O 7. O-O Nbd7 8. cxd5 Nxd5 9. Nxd5 cxd5 10. Qb3 Nf6 11. Bd2 Ne4 12. Rfc1 Bg4 13. Be1 Qd6 14. Rc2 Rfc8 15. Rxc8+ Bxc8 16. Rc1 b6 17. Bb4 Qd7 18. Qc2 a5 19. Be1 Bf6 20. Qc6 Qxc6 21. Rxc6 Rb8 22. Ne5 Kf8 23. f3 Nd6 24. Bg3 Ke8 25. b3 Bd7 26. Rc7 Be6 27. Ba6 Ra8 28. Bb7 Nxb7 29. Rxb7 Rc8 30. Rxb6 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.17"]
[Round "5"]
[White "Lengyel, Levente"]
[Black "Van den Berg, Carel"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A12"]
[EventDate "1971.01.12"]
[PlyCount "76"]

1. Nf3 d5 2. g3 c6 3. Bg2 Bg4 4. d3 Nd7 5. O-O e6 6. Nbd2 Bd6 7. b3 Ngf6 8. Bb2 O-O 9. c4 Qe7 10. a3 a5 11. Qc2 Rfd8 12. e4 dxe4 13. dxe4 Bxf3 14. Nxf3 e5 15. Rfe1 Ne8 16. Re2 f6 17. Bh3 Nf8 18. Rd2 Bc5 19. Rxd8 Rxd8 20. Bc3 b6 21. Qb2 Ne6 22. b4 axb4 23. axb4 Bd6 24. c5 bxc5 25. Qb3 N8c7 26. bxc5 Bxc5 27. Ba5 Ra8 28. Ra4 Kf8 29. Bxc7 Nxc7 30. Rxa8+ Nxa8 31. Qb8+ Qe8 32. Qb7 Nb6 33. Nh4 Qa8 34. Qxa8+ Nxa8 35. Bd7 g6 36. Bxc6 Nc7 37. Kg2 Ne6 38. Bd5 Ke7 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.17"]
[Round "5"]
[White "Mecking, Henrique"]
[Black "Korchnoi, Viktor"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E55"]
[EventDate "1971.01.12"]
[PlyCount "46"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Nbd7 9. a3 cxd4 10. Qxd4 Bxc3 11. Qxc3 Qc7 12. Qb3 b6 13. Be2 Bb7 14. Nd4 Bd5 15. Qd1 Rfd8 16. f3 e5 17. Nb5 Qc6 18. Nc3 Bc4 19. Bxc4 Qxc4 20. e4 Nc5 21. Qc2 Nb3 22. Rb1 h6 23. Be3 Rd3 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.17"]
[Round "5"]
[White "Najdorf, Miguel"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E19"]
[EventDate "1971.01.12"]
[PlyCount "41"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Qc2 Nxc3 9. Qxc3 Be4 10. Rd1 Bf6 11. Qe3 d5 12. Bd2 Nd7 13. Bc3 c6 14. Rac1 Qc7 15. Nd2 Bxg2 16. Kxg2 Qb7 17. Qf3 b5 18. cxb5 cxb5 19. Bb4 Rfc8 20. Nb3 h6 21. Qd3 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.17"]
[Round "5"]
[White "Olafsson, Fridrik"]
[Black "Ree, Hans"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A04"]
[EventDate "1971.01.12"]
[PlyCount "123"]

1. Nf3 c5 2. g3 g6 3. Bg2 Bg7 4. O-O Nc6 5. c3 e5 6. d3 Nge7 7. a3 a5 8. a4 O-O 9. Na3 d5 10. e4 d4 11. Nc4 Rb8 12. cxd4 cxd4 13. Bd2 f6 14. Qb3 Be6 15. Rfc1 Nc8 16. Bh3 Bf7 17. Qb5 N8a7 18. Qb6 Bxc4 19. Qxd8 Rfxd8 20. Rxc4 Kf7 21. Rac1 Bf8 22. Ne1 Bd6 23. f4 h6 24. Nf3 Rh8 25. Kf1 Rbe8 26. Ke2 Kg7 27. Ne1 Rhf8 28. fxe5 fxe5 29. Nc2 Re7 30. Rf1 Rxf1 31. Kxf1 Rc7 32. Ke2 h5 33. Be6 Nd8 34. Rxc7+ Bxc7 35. Bd5 Nac6 36. Na3 Kf6 37. h4 Ke7 38. Nc4 Ke8 39. Bg5 b6 40. Bf6 Kf8 41. Kf3 Ke8 42. Ke2 Kd7 43. Nd2 Nb4 44. Bc4 Nbc6 45. Nf3 Kd6 46. Bg8 Ne6 47. Bf7 Nf8 48. Nd2 Kc5 49. Bg7 Bd6 50. Bxf8 Bxf8 51. Bxg6 Kb4 52. Bxh5 Nd8 53. Be8 Ne6 54. Nc4 Kb3 55. Nxb6 Kxb2 56. Nc4+ Kb3 57. Nxe5 Bd6 58. Ng6 Bxg3 59. h5 Nf4+ 60. Nxf4 Bxf4 61. Kf3 Be5 62. Kg4 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.18"]
[Round "6"]
[White "Donner, Jan"]
[Black "Kuijpers, Franciscus"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A25"]
[EventDate "1971.01.12"]
[PlyCount "75"]

1. c4 e5 2. Nc3 d6 3. g3 g6 4. Bg2 Bg7 5. d3 Nc6 6. Rb1 f5 7. b4 Nf6 8. b5 Ne7 9. e4 O-O 10. Nge2 Nh5 11. exf5 gxf5 12. Nd5 Nxd5 13. Bxd5+ Kh8 14. O-O f4 15. Nc3 Qe8 16. Bf3 Nf6 17. Kh1 Qf7 18. gxf4 exf4 19. Nd5 Nxd5 20. Bxd5 Be6 21. Bxb7 Rab8 22. Bf3 d5 23. cxd5 Bxd5 24. a4 Rb6 25. Rb4 Rh6 26. Bxd5 Qxd5+ 27. Re4 Rh3 28. f3 Rxh2+ 29. Kxh2 Qh5+ 30. Kg2 Be5 31. Rf2 Rg8+ 32. Kf1 Qh1+ 33. Ke2 Rg1 34. Qd2 Rg2 35. Rxe5 Rxf2+ 36. Kxf2 Qh2+ 37. Ke1 Qg1+ 38. Ke2 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.18"]
[Round "6"]
[White "Gligoric, Svetozar"]
[Black "Andersson, Ulf"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E44"]
[EventDate "1971.01.12"]
[PlyCount "82"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2 Bb7 6. a3 Bxc3+ 7. Nxc3 d5 8. cxd5 exd5 9. b4 O-O 10. Bd3 Nbd7 11. O-O c5 12. bxc5 bxc5 13. Rb1 Bc6 14. Bf5 Re8 15. dxc5 Nxc5 16. Rb4 Qe7 17. Bb2 Rab8 18. Ne2 Nce4 19. Bxe4 Nxe4 20. Qd4 f6 21. Nf4 Rxb4 22. axb4 Qd7 23. Ra1 Re7 24. f3 Ng5 25. b5 Bxb5 26. Nxd5 Rf7 27. e4 Ne6 28. Qb4 Bc6 29. Qb8+ Qd8 30. Qxd8+ Nxd8 31. Ne3 Rd7 32. Nf5 Bb5 33. Nd4 a6 34. h4 Kf7 35. Rc1 Ne6 36. Nxe6 Kxe6 37. h5 Rb7 38. h6 gxh6 39. Rc5 Bd7 40. Bd4 Rb5 41. Rc7 f5 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.18"]
[Round "6"]
[White "Hubner, Robert"]
[Black "Lengyel, Levente"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "C95"]
[EventDate "1971.01.12"]
[PlyCount "48"]

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 Nb8 10. d4 Nbd7 11. c4 c6 12. a3 bxc4 13. Bxc4 Nxe4 14. Rxe4 d5 15. Re1 dxc4 16. Qe2 Re8 17. Nbd2 exd4 18. Nxd4 Bb7 19. Nxc4 Bf6 20. Qxe8+ Qxe8 21. Rxe8+ Rxe8 22. Be3 c5 23. Nb3 Bd5 24. Nba5 Ne5 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.18"]
[Round "6"]
[White "Ivkov, Borislav"]
[Black "Langeweg, Christian"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A17"]
[EventDate "1971.01.12"]
[PlyCount "80"]

1. c4 Nf6 2. Nf3 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3 6. Qxc3 d6 7. b4 e5 8. Bb2 b6 9. e3 c5 10. Be2 Bb7 11. O-O Nbd7 12. d3 Rc8 13. a4 Re8 14. e4 cxb4 15. Qxb4 a5 16. Qa3 Nc5 17. Nd2 Bc6 18. Bd1 Nfd7 19. f4 exf4 20. Rxf4 Qg5 21. Rf2 Ne5 22. Bc2 Ng4 23. Nf3 Qh5 24. Qc3 f6 25. Rd2 Re7 26. h3 Ne3 27. Nd4 Bd7 28. Nb5 Bxb5 29. axb5 f5 30. exf5 Nxc2 31. Qxc2 Qxf5 32. Rf1 Qg6 33. Rf3 Rce8 34. Rdf2 Re3 35. Bd4 Rxd3 36. Rxd3 Qxd3 37. Qxd3 Nxd3 38. Rd2 Nc5 39. Bf2 Rd8 40. Bxc5 bxc5 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.18"]
[Round "6"]
[White "Korchnoi, Viktor"]
[Black "Olafsson, Fridrik"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E81"]
[EventDate "1971.01.12"]
[PlyCount "63"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. f3 e5 6. Nge2 O-O 7. Bg5 c6 8. Qd2 exd4 9. Nxd4 Nbd7 10. O-O-O Qb6 11. Nc2 Nc5 12. Be3 Be6 13. b4 Rfd8 14. Be2 Qc7 15. bxc5 dxc5 16. Qe1 b5 17. Rxd8+ Rxd8 18. cxb5 cxb5 19. Bxb5 Qb6 20. Qg3 Rc8 21. Rd1 a6 22. Rd6 Qa5 23. Na3 c4 24. Rxe6 fxe6 25. Qd6 Kh8 26. Qxe6 Rb8 27. Qd6 Re8 28. Bxc4 Nh5 29. Bb3 Rc8 30. Nc4 Qb5 31. Qd5 Qb8 32. Nd6 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.18"]
[Round "6"]
[White "Petrosian, Tigran"]
[Black "Mecking, Henrique"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D03"]
[EventDate "1971.01.12"]
[PlyCount "114"]

1. d4 Nf6 2. Nf3 e6 3. Bg5 c5 4. e3 d5 5. c3 Nc6 6. Nbd2 cxd4 7. exd4 Be7 8. Bd3 h6 9. Bf4 Nh5 10. Be3 Nf6 11. Ne5 Nxe5 12. dxe5 Nd7 13. Bd4 Nc5 14. Bc2 a5 15. Qg4 g6 16. O-O Bd7 17. Rfe1 Qc7 18. a4 Na6 19. Qe2 Kf8 20. Nf3 Kg7 21. Be3 Nc5 22. Nd4 Ra6 23. Bc1 Raa8 24. g3 b6 25. h4 h5 26. Qf3 Qd8 27. Bd2 Qe8 28. Bg5 Qd8 29. Qf4 Rc8 30. Re3 Bxg5 31. hxg5 Ra8 32. Qf6+ Qxf6 33. exf6+ Kh7 34. Kg2 Rae8 35. f4 Rb8 36. Ree1 Nb7 37. Rh1 Kg8 38. Nf3 Nd6 39. Ne5 Be8 40. Bd3 Rc8 41. Kf3 Bc6 42. Rh2 Be8 43. Ke3 Rc7 44. Kd4 Nb7 45. b4 Nd8 46. Rh4 Nb7 47. Ra2 Nd6 48. Rh1 Nb7 49. b5 Nc5 50. Bc2 Nd7 51. Ra3 Nc5 52. c4 Nd7 53. Rc3 Nxe5 54. Kxe5 dxc4 55. Be4 Rc8 56. Kd6 Rc5 57. Rhc1 h4 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.18"]
[Round "6"]
[White "Ree, Hans"]
[Black "Hort, Vlastimil"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B82"]
[EventDate "1971.01.12"]
[PlyCount "96"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. f4 Be7 7. Be3 Nc6 8. Qf3 e5 9. fxe5 Nxe5 10. Bb5+ Nfd7 11. Qe2 O-O 12. O-O Nb6 13. Nf5 Be6 14. Rad1 Qc7 15. Nxe7+ Qxe7 16. Bxb6 axb6 17. Qf2 Qc7 18. Qd4 Rfd8 19. a3 Kf8 20. Rd2 Qc5 21. Rfd1 Ke7 22. a4 Nc6 23. Qf2 Ne5 24. h3 Rac8 25. Kh2 Qxf2 26. Rxf2 h5 27. Kg3 g5 28. Rfd2 h4+ 29. Kf2 g4 30. hxg4 Nxg4+ 31. Kg1 Rg8 32. Rd3 Rg5 33. Rxd6 Ne3 34. R1d2 Rcg8 35. Rxb6 h3 36. Rxb7+ Kf6 37. Rf2+ Ke5 38. Be2 Rxg2+ 39. Rxg2 Rxg2+ 40. Kh1 Kf4 41. Rb8 Bg4 42. Nd5+ Kg3 43. Nxe3 Rxe2 44. Nf5+ Kf4 45. Rb3 Rxe4 46. Ng3 Rd4 47. Nf1 Rd1 48. Rb4+ Kg5 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.18"]
[Round "6"]
[White "Van den Berg, Carel"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B80"]
[EventDate "1971.01.12"]
[PlyCount "97"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bd3 Nc6 7. Nb3 Be7 8. O-O O-O 9. f4 b6 10. Qf3 Bb7 11. Qh3 g6 12. Bd2 Nb4 13. Rae1 Nxd3 14. cxd3 Re8 15. Kh1 Bf8 16. e5 Nd7 17. Ne4 Bxe4 18. Rxe4 Bg7 19. d4 a5 20. a4 Rc8 21. Bc3 Rc4 22. Nd2 Rxa4 23. Ree1 b5 24. Ne4 Bf8 25. d5 Rxe4 26. Rxe4 exd5 27. Rd4 b4 28. Bd2 Nb6 29. f5 Rxe5 30. Bh6 Re4 31. Rxe4 dxe4 32. Bxf8 Qxf8 33. Qe3 Na4 34. Qxe4 Nxb2 35. Rc1 Na4 36. Rc7 Nc5 37. Qc6 Kg7 38. h3 Qd8 39. Rc8 Qf6 40. Qe8 Qxf5 41. Qf8+ Kf6 42. Qxd6+ Ne6 43. Qd1 Qe5 44. Ra8 Kg7 45. Qa4 Nc5 46. Qxa5 b3 47. Qd8 Qe1+ 48. Kh2 Qe5+ 49. Kh1 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.19"]
[Round "7"]
[White "Andersson, Ulf"]
[Black "Donner, Jan"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A06"]
[EventDate "1971.01.12"]
[PlyCount "81"]

1. Nf3 d5 2. b3 Nf6 3. Bb2 Bg4 4. e3 e6 5. Be2 Nbd7 6. h3 Bxf3 7. Bxf3 Bd6 8. d3 O-O 9. O-O Qe7 10. a4 a5 11. Nd2 c6 12. Qe2 e5 13. e4 d4 14. g3 Bb4 15. Bg2 Ne8 16. h4 Nc7 17. Nf3 b5 18. h5 Ne6 19. Bh3 Rfb8 20. Nh4 Bc3 21. Bxc3 dxc3 22. Bxe6 fxe6 23. Qg4 bxa4 24. Rxa4 Nb6 25. Raa1 a4 26. bxa4 Rxa4 27. Nf3 Rxa1 28. Rxa1 Nd7 29. h6 g6 30. Ra7 Nf6 31. Rxe7 Nxg4 32. Rg7+ Kf8 33. Rxh7 Rb1+ 34. Kg2 Rc1 35. Rh8+ Kf7 36. Ng5+ Ke7 37. h7 Rxc2 38. Rf8 Kxf8 39. h8=Q+ Ke7 40. Qg7+ Kd6 41. Qf8+ 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.19"]
[Round "7"]
[White "Hort, Vlastimil"]
[Black "Korchnoi, Viktor"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A46"]
[EventDate "1971.01.12"]
[PlyCount "37"]

1. d4 Nf6 2. Nf3 e6 3. Bg5 c5 4. e3 Be7 5. c3 cxd4 6. cxd4 Qb6 7. Qc1 Nc6 8. Nc3 O-O 9. Be2 h6 10. Bh4 d6 11. O-O Bd7 12. Qc2 Qd8 13. Rfd1 e5 14. Nxe5 Be8 15. Rac1 Rc8 16. h3 a6 17. Bd3 Nd7 18. Bxe7 Qxe7 19. Nxd7 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.19"]
[Round "7"]
[White "Kuijpers, Franciscus"]
[Black "Ivkov, Borislav"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "C19"]
[EventDate "1971.01.12"]
[PlyCount "154"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Ne7 5. a3 Bxc3+ 6. bxc3 c5 7. Nf3 Nbc6 8. a4 Qa5 9. Qd2 Bd7 10. Bd3 c4 11. Be2 f6 12. Ba3 O-O 13. O-O Rf7 14. Rab1 b6 15. exf6 Rxf6 16. Ne5 Be8 17. f4 Nf5 18. Nxc6 Bxc6 19. g4 Rg6 20. Kh1 Nh6 21. g5 Nf5 22. Ra1 Bxa4 23. Bh5 Be8 24. Qe1 Qa4 25. Rf2 Qd7 26. Re2 Bf7 27. Re5 Qa4 28. Bd1 h5 29. Bb2 Qb5 30. Bc1 h4 31. Bh5 Qd7 32. Bxg6 Bxg6 33. Rxe6 Kf7 34. Re5 Rh8 35. h3 Ng3+ 36. Kh2 Bxc2 37. Ba3 Nf5 38. g6+ Kxg6 39. Qe2 Be4 40. Qg4+ Kh7 41. Re7 Qa4 42. Rxe4 Nh6 43. Qe6 dxe4 44. Qxe4+ Kg8 45. d5 Nf7 46. Qg2 Nd6 47. Rg1 Nf5 48. Qg6 Qc2+ 49. Rg2 Qe4 50. Qe6+ Qxe6 51. dxe6 Kh7 52. e7 Re8 53. Rd2 Kg6 54. Rd7 Kf6 55. Rxa7 Nxe7 56. Rc7 Nd5 57. Rxc4 Kf5 58. Bd6 Re2+ 59. Kg1 Re6 60. Bb8 Re8 61. Bd6 Re6 62. Bc7 Re3 63. Kh2 Re8 64. Bd6 Re2+ 65. Kg1 Re3 66. Rc8 Rxc3 67. Re8 Re3 68. Rg8 Rxh3 69. Kf2 Rh2+ 70. Kf3 Rh3+ 71. Ke2 Rg3 72. Rh8 Kg4 73. Rh7 g6 74. Rh6 Nxf4+ 75. Bxf4 Kxf4 76. Rxh4+ Rg4 77. Rh8 Kg5 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.19"]
[Round "7"]
[White "Langeweg, Christian"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E67"]
[EventDate "1971.01.12"]
[PlyCount "31"]

1. Nf3 Nf6 2. c4 g6 3. b3 Bg7 4. Bb2 O-O 5. g3 d6 6. d4 c6 7. Bg2 Nbd7 8. O-O Re8 9. Nc3 e5 10. Qc2 e4 11. Ng5 e3 12. fxe3 Qe7 13. Bc1 Ng4 14. Nge4 Bh6 15. Bh3 Ndf6 16. Nxf6+ 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.19"]
[Round "7"]
[White "Lengyel, Levente"]
[Black "Gligoric, Svetozar"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D79"]
[EventDate "1971.01.12"]
[PlyCount "31"]

1. d4 Nf6 2. c4 g6 3. g3 c6 4. Bg2 d5 5. Nf3 Bg7 6. cxd5 cxd5 7. Ne5 O-O 8. Nc3 Nc6 9. O-O e6 10. Bg5 h6 11. Bf4 Bd7 12. Qd2 Nxe5 13. Bxe5 Bc6 14. Rac1 Qe7 15. Rc2 Rfd8 16. h3 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.19"]
[Round "7"]
[White "Mecking, Henrique"]
[Black "Van den Berg, Carel"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D19"]
[EventDate "1971.01.12"]
[PlyCount "69"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O O-O 9. Qe2 Bg4 10. h3 Bh5 11. Rd1 Nbd7 12. e4 Qe7 13. Na2 Ba5 14. Bg5 h6 15. Bh4 Qe8 16. b4 Bc7 17. g4 Bg6 18. Nc3 Rc8 19. Rac1 Bf4 20. Rc2 Bb8 21. Ne1 a6 22. f3 e5 23. d5 Ba7+ 24. Kg2 Bd4 25. dxc6 Rxc6 26. Nd5 Kh8 27. b5 axb5 28. Nxf6 Nxf6 29. Bxb5 Rxc2 30. Nxc2 Qe6 31. Nxd4 exd4 32. Rxd4 Rc8 33. Bf2 Rc3 34. Qb2 Nxe4 35. Rxe4 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.19"]
[Round "7"]
[White "Najdorf, Miguel"]
[Black "Hubner, Robert"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E41"]
[EventDate "1971.01.12"]
[PlyCount "104"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 Bxc3+ 7. bxc3 d6 8. e4 e5 9. d5 Ne7 10. g3 h6 11. Nh4 g5 12. Ng2 Qa5 13. Qb3 Bh3 14. O-O O-O-O 15. Rb1 Qc7 16. f3 Kb8 17. Rf2 Rhg8 18. Ne3 Bc8 19. Kf1 Rdf8 20. Ke1 Ne8 21. Nf5 Nxf5 22. exf5 f6 23. g4 Rh8 24. Be3 h5 25. Bf1 Rf7 26. h3 Qd7 27. Kd2 Nc7 28. a4 Re7 29. Re1 Na8 30. a5 Qd8 31. Qa3 Rhh7 32. Rb1 b6 33. Bd3 Rb7 34. axb6 Nxb6 35. Ra1 Qh8 36. Kc2 hxg4 37. hxg4 Bd7 38. Qa2 Rh2 39. Kd2 Rxf2+ 40. Bxf2 Qh2 41. Ke2 Na4 42. Qd2 Be8 43. Rb1 Rxb1 44. Bxb1 Qf4 45. Bd3 Qxd2+ 46. Kxd2 Nb6 47. Kc1 Ba4 48. Bc2 Bd7 49. Bd3 Kc7 50. Kb2 Bc8 51. Kb3 Ba6 52. Be3 Nxd5 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.19"]
[Round "7"]
[White "Olafsson, Fridrik"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D94"]
[EventDate "1971.01.12"]
[PlyCount "26"]

1. c4 Nf6 2. Nc3 c6 3. Nf3 d5 4. e3 g6 5. d4 Bg7 6. Be2 O-O 7. O-O b6 8. b3 e6 9. a4 a5 10. Ne5 Bb7 11. Ba3 Re8 12. b4 Nfd7 13. Nxd7 Nxd7 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.21"]
[Round "8"]
[White "Andersson, Ulf"]
[Black "Lengyel, Levente"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A14"]
[EventDate "1971.01.12"]
[PlyCount "73"]

1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. O-O O-O 6. b3 b6 7. Bb2 Bb7 8. d3 c5 9. e3 Nc6 10. Qe2 Qc7 11. Nc3 dxc4 12. bxc4 Rad8 13. Rfd1 Rd7 14. Ne1 Rfd8 15. Ne4 Nxe4 16. Bxe4 a6 17. Rab1 b5 18. cxb5 axb5 19. a3 Na5 20. Bxb7 Nxb7 21. Qg4 Bf8 22. Rdc1 Ra8 23. Qe2 Qd6 24. Bc3 Rxa3 25. Rxb5 Qa6 26. Rbb1 Nd8 27. Qb2 Rb7 28. Qd2 Nc6 29. Rxb7 Qxb7 30. Ra1 Rxa1 31. Bxa1 Qb1 32. Bc3 Nb4 33. Kg2 Qb3 34. h3 Nd5 35. Ba5 c4 36. dxc4 Qxc4 37. Qc2 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.21"]
[Round "8"]
[White "Donner, Jan"]
[Black "Ivkov, Borislav"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A42"]
[EventDate "1971.01.12"]
[PlyCount "72"]

1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. e4 e5 5. Be3 exd4 6. Bxd4 Nf6 7. f3 Nc6 8. Be3 O-O 9. Nge2 Ne5 10. Nf4 c6 11. Qb3 Nfd7 12. Rd1 Qe7 13. Be2 Nc5 14. Qc2 f5 15. b4 fxe4 16. bxc5 exf3 17. cxd6 Qe8 18. gxf3 Nxf3+ 19. Kf2 Ng5 20. h4 Ne6 21. Kg3 Nxf4 22. Bxf4 Rxf4 23. Kxf4 Bf5 24. Bd3 Qe5+ 25. Kf3 Bg4+ 26. Kxg4 Qh5+ 27. Kg3 Be5+ 28. Kf2 Rf8+ 29. Bf5 Rxf5+ 30. Ke3 Qf3+ 31. Kd2 Bf4+ 32. Ke1 Bg3+ 33. Kd2 Bf4+ 34. Ke1 Qxh1+ 35. Ke2 Qg2+ 36. Kd3 Qf3+ 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.21"]
[Round "8"]
[White "Gligoric, Svetozar"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D58"]
[EventDate "1971.01.12"]
[PlyCount "73"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. Nf3 O-O 6. Rc1 h6 7. Bh4 b6 8. cxd5 exd5 9. e3 Bb7 10. Bd3 c5 11. O-O Ne4 12. Bxe7 Qxe7 13. Ne5 Nf6 14. Qa4 c4 15. Be2 a6 16. b3 b5 17. Qa5 Nc6 18. Nxc6 Bxc6 19. Bf3 Qd8 20. Qxd8 Rfxd8 21. bxc4 bxc4 22. Rb1 Rab8 23. Rxb8 Rxb8 24. Rb1 Rxb1+ 25. Nxb1 Kf8 26. Kf1 Ke7 27. Ke1 Kd6 28. Nc3 a5 29. Bd1 Nd7 30. Kd2 f5 31. g4 fxg4 32. Bxg4 Nf6 33. Bd1 g5 34. f3 h5 35. Ke1 g4 36. Kf2 gxf3 37. Bxf3 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.21"]
[Round "8"]
[White "Hubner, Robert"]
[Black "Mecking, Henrique"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B06"]
[EventDate "1971.01.12"]
[PlyCount "164"]

1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. Bc4 Nf6 5. Qe2 c6 6. Bb3 O-O 7. O-O Bg4 8. h3 Bxf3 9. Qxf3 Nbd7 10. c3 e5 11. Bg5 Qa5 12. Be3 d5 13. Nd2 Nxe4 14. Nxe4 exd4 15. Bxd4 Bxd4 16. cxd4 dxe4 17. Qxe4 Rae8 18. Qf4 Qb4 19. Rac1 Re2 20. Rc3 Nb6 21. Rf3 Nd5 22. Bxd5 cxd5 23. Rb3 Qe7 24. Rc1 Re1+ 25. Rxe1 Qxe1+ 26. Kh2 Qe7 27. Rc3 Rd8 28. g3 Rd6 29. Qe5 Qd8 30. Kg2 Rc6 31. Rxc6 bxc6 32. b3 Qb6 33. g4 h6 34. Qe3 Kg7 35. h4 Qb4 36. Kf3 Qb6 37. Qe5+ Kg8 38. h5 gxh5 39. gxh5 Qd8 40. Kg3 Qd7 41. Qf6 Kh7 42. f3 Qe8 43. Kf2 Qd7 44. Ke3 Qe8+ 45. Kd3 Qd7 46. Ke2 Qe8+ 47. Kf1 Qd7 48. Kf2 Qe8 49. Qd6 Qc8 50. Qe7 Qf5 51. Qxa7 Qxh5 52. Qc7 Qh4+ 53. Ke2 Kg7 54. Qe5+ f6 55. Qe3 Qh2+ 56. Qf2 Qb8 57. Kf1 Qb4 58. Qg1+ Kf7 59. Qe3 h5 60. Kg2 c5 61. dxc5 d4 62. Qe4 Qxc5 63. a4 Qg5+ 64. Kf1 Qc1+ 65. Kg2 Qd2+ 66. Kh3 d3 67. Qd5+ Kg6 68. Qe4+ Kg5 69. Qh4+ Kg6 70. Qe4+ Kh6 71. Qd4 Kg7 72. Qd7+ Kg6 73. Qe8+ Kg5 74. Qb5+ Kf4 75. Qc6 Qe1 76. Qxf6+ Ke3 77. Qe5+ Kf2 78. Qh2+ Kxf3 79. Qg2+ Kf4 80. Qh2+ Kf5 81. Qd6 Qf1+ 82. Kg3 h4+ 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.21"]
[Round "8"]
[White "Korchnoi, Viktor"]
[Black "Langeweg, Christian"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A07"]
[EventDate "1971.01.12"]
[PlyCount "41"]

1. g3 Nf6 2. Bg2 d5 3. Nf3 c6 4. O-O Bf5 5. d3 e6 6. e3 Nbd7 7. Qe2 a5 8. Nc3 Be7 9. e4 dxe4 10. dxe4 Bg6 11. Ne1 Nc5 12. Kh1 Bh5 13. f3 e5 14. Bh3 O-O 15. Be3 Nfd7 16. Qg2 b5 17. Bg1 Re8 18. Nd1 Bf8 19. Ne3 f6 20. Rd1 Qc7 21. Bxd7 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.21"]
[Round "8"]
[White "Petrosian, Tigran"]
[Black "Hort, Vlastimil"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E64"]
[EventDate "1971.01.12"]
[PlyCount "67"]

1. c4 g6 2. d4 Nf6 3. d5 Bg7 4. Nc3 d6 5. g3 e5 6. Bg2 O-O 7. Nf3 c5 8. O-O Nbd7 9. e4 h6 10. Bd2 Ne8 11. Qe2 Kh7 12. a4 b6 13. a5 Rb8 14. axb6 Qxb6 15. Rfb1 a6 16. Bh3 Qb7 17. Nd1 Nb6 18. Bxc8 Qxc8 19. Nh4 Nc7 20. Ne3 Qh3 21. b4 Nd7 22. b5 axb5 23. Ra7 Rfc8 24. Ba5 Nb6 25. cxb5 Qd7 26. Kg2 c4 27. Bxb6 Rxb6 28. Nxc4 Rxb5 29. Nb6 Rxb6 30. Rxb6 Bf6 31. Nf3 Be7 32. Rc6 Bd8 33. Nd2 Qe8 34. Nc4 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.21"]
[Round "8"]
[White "Ree, Hans"]
[Black "Kuijpers, Franciscus"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A25"]
[EventDate "1971.01.12"]
[PlyCount "113"]

1. c4 e5 2. Nc3 d6 3. g3 g6 4. Bg2 Bg7 5. e3 Nc6 6. Nge2 Nge7 7. Rb1 a5 8. a3 O-O 9. O-O Bf5 10. d3 Qd7 11. Nd5 Nxd5 12. cxd5 Ne7 13. e4 Bg4 14. f3 Bh3 15. d4 Bxg2 16. Kxg2 f5 17. dxe5 dxe5 18. Nc3 Rf7 19. Be3 Raf8 20. Qe2 f4 21. Bc5 fxg3 22. hxg3 b6 23. Bxe7 Qxe7 24. Rbc1 Qg5 25. Rc2 Bf6 26. Nb5 Bd8 27. Qd2 Qxd2+ 28. Rxd2 Rd7 29. Rc2 Rff7 30. Rc6 Rf6 31. Rc3 Kg7 32. Rfc1 Rff7 33. Rc6 Rf6 34. R6c4 Rff7 35. R1c2 h5 36. Rc6 Rf6 37. R6c3 Rff7 38. Rc6 g5 39. Re6 Rde7 40. Rcc6 Rxe6 41. Rxe6 g4 42. fxg4 hxg4 43. Re8 Bg5 44. Rc8 Be3 45. Rxc7 Rxc7 46. Nxc7 Bc1 47. a4 Bxb2 48. Ne8+ Kf8 49. Nd6 Bd4 50. Kf1 Bc5 51. Nc4 Bd4 52. Ke2 Ke8 53. Kd3 Kd7 54. Ne3 b5 55. Nf5 b4 56. Kc4 Bf2 57. Nh6 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.21"]
[Round "8"]
[White "Van den Berg, Carel"]
[Black "Olafsson, Fridrik"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D72"]
[EventDate "1971.01.12"]
[PlyCount "70"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5 6. e4 Nb4 7. d5 c6 8. a3 Qa5 9. Nc3 cxd5 10. Be3 N4c6 11. exd5 Ne5 12. Nge2 O-O 13. O-O Bg4 14. f3 Bf5 15. Bd4 Qa6 16. h3 Rc8 17. f4 Nc4 18. b3 Nd6 19. Bxg7 Kxg7 20. Qd4+ Kg8 21. Rfc1 Nd7 22. g4 Bd3 23. Qe3 Qb6 24. Qxb6 Nxb6 25. Kf2 Rc5 26. Na2 Bc2 27. Nb4 Rac8 28. Rxc2 Rxc2 29. Nxc2 Rxc2 30. Rc1 Rb2 31. a4 Rxb3 32. Rc7 Kf8 33. Nc3 Rb2+ 34. Kg3 Rc2 35. a5 Na4 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.22"]
[Round "9"]
[White "Hort, Vlastimil"]
[Black "Van den Berg, Carel"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A25"]
[EventDate "1971.01.12"]
[PlyCount "59"]

1. c4 e5 2. Nc3 Nf6 3. g3 Bb4 4. Bg2 O-O 5. e4 Nc6 6. Nge2 Bc5 7. O-O Nd4 8. Nxd4 Bxd4 9. Ne2 Bb6 10. b3 Re8 11. Bb2 c6 12. d4 d6 13. Qc2 Bg4 14. f3 Be6 15. Rad1 Qc8 16. Kh1 Bh3 17. c5 Bxg2+ 18. Kxg2 Bc7 19. cxd6 Bxd6 20. Rd3 Qc7 21. Rfd1 exd4 22. Bxd4 Be5 23. Bc5 b6 24. Bf2 Qb7 25. Nd4 Rac8 26. Nf5 c5 27. g4 h6 28. Bg3 Bxg3 29. hxg3 Nxe4 30. Rd7 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.22"]
[Round "9"]
[White "Ivkov, Borislav"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D97"]
[EventDate "1971.01.12"]
[PlyCount "33"]

1. Nf3 g6 2. d4 Bg7 3. c4 Nf6 4. Nc3 d5 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 a6 8. Bf4 b5 9. Qxc7 Qxc7 10. Bxc7 Bb7 11. e5 Nd5 12. Nxd5 Bxd5 13. Be2 Rc8 14. Ba5 Nc6 15. Bc3 b4 16. Bd2 f6 17. O-O 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.22"]
[Round "9"]
[White "Kuijpers, Franciscus"]
[Black "Korchnoi, Viktor"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "C19"]
[EventDate "1971.01.12"]
[PlyCount "74"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Nf3 Qa5 8. Qd2 Nbc6 9. a4 f6 10. Ba3 fxe5 11. dxe5 Qxa4 12. Be2 b6 13. c4 Nd8 14. O-O Qd7 15. Ng5 h6 16. Nh3 O-O 17. Rfd1 Ndc6 18. Bb2 Bb7 19. Nf4 d4 20. c3 Na5 21. Ra3 d3 22. Bxd3 Qc6 23. f3 Rad8 24. Qc1 Qc8 25. Nh3 Qc7 26. Qc2 Qxe5 27. Raa1 Nec6 28. Nf2 Qc7 29. Qe2 Ne5 30. Bb1 Rxd1+ 31. Nxd1 Nexc4 32. Qc2 Rf5 33. Qf2 Rh5 34. g3 Rd5 35. Ba2 Rd2 36. Qe1 Qf7 37. f4 Rg2+ 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.22"]
[Round "9"]
[White "Langeweg, Christian"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "C41"]
[EventDate "1971.01.12"]
[PlyCount "38"]

1. Nf3 d6 2. d4 Nf6 3. Nc3 Nbd7 4. e4 e5 5. g3 Be7 6. Bg2 O-O 7. O-O Re8 8. a4 Bf8 9. a5 a6 10. b3 b5 11. d5 Bb7 12. Ne1 Nb8 13. Nd3 c6 14. Nb4 c5 15. Nd3 Nbd7 16. Nb1 g6 17. c4 Bg7 18. Bb2 Nf8 19. Nd2 b4 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.22"]
[Round "9"]
[White "Lengyel, Levente"]
[Black "Donner, Jan"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E63"]
[EventDate "1971.01.12"]
[PlyCount "154"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. d4 d6 6. Nf3 Nc6 7. O-O a6 8. h3 Rb8 9. Be3 b5 10. Nd2 Bd7 11. Rc1 Na5 12. b3 bxc4 13. bxc4 Rb2 14. Rc2 Rb4 15. Qc1 Qb8 16. Qa3 Nxc4 17. Nxc4 Rxc4 18. Rb2 Qd8 19. Rb3 c6 20. Qxa6 d5 21. Na4 Bc8 22. Qa7 Nd7 23. Rd1 Re8 24. Bf4 e6 25. Bf1 g5 26. Bd6 e5 27. dxe5 Bxe5 28. Bxe5 Nxe5 29. Nb6 Rc2 30. Nxc8 Qxc8 31. Rdb1 Qf5 32. Rb8 Rxb8 33. Qxb8+ Kg7 34. Qb3 d4 35. g4 Qe4 36. Rb2 Rc1 37. Qg3 c5 38. Qg2 Qxg2+ 39. Kxg2 c4 40. Rb5 Ng6 41. Rxg5 c3 42. e3 c2 43. Rc5 Nh4+ 44. Kg3 Rxf1 45. Rxc2 Ng6 46. exd4 Rd1 47. Rc4 Rd3+ 48. f3 Ra3 49. Rc2 Ne7 50. h4 h6 51. Kf4 Nd5+ 52. Ke5 Nb4 53. Rc4 Nd3+ 54. Kd6 Rxa2 55. Rc3 Nf4 56. h5 Re2 57. Ra3 Re6+ 58. Kc5 Re1 59. Kb4 Rd1 60. Kc4 Rc1+ 61. Kb4 Nd5+ 62. Kb5 Nf4 63. Kb4 Rd1 64. Kc4 Kf6 65. Ra5 Ne6 66. Rf5+ Ke7 67. d5 Ng7 68. Rf4 f5 69. gxf5 Kf6 70. Rg4 Nxf5 71. Rg6+ Ke5 72. Re6+ Kf4 73. Kc5 Kxf3 74. Rg6 Kf4 75. Re6 Kg4 76. Re5 Rh1 77. Kc6 Rxh5 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.22"]
[Round "9"]
[White "Mecking, Henrique"]
[Black "Gligoric, Svetozar"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D93"]
[EventDate "1971.01.12"]
[PlyCount "104"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Qb3 c6 7. Nf3 Qa5 8. Nd2 Nbd7 9. Be2 Nh5 10. Bxh5 dxc4 11. Qd1 gxh5 12. Nxc4 Qf5 13. O-O Nb6 14. Ne5 Be6 15. Qd3 Rac8 16. Qxf5 Bxf5 17. Nf3 c5 18. Be5 f6 19. dxc5 Nc4 20. Bd4 e5 21. Nd5 Rf7 22. Bc3 Rxc5 23. Rfd1 Be4 24. Nb4 a5 25. Nd3 Rc8 26. Nde1 b5 27. Nd2 Nxd2 28. Bxd2 b4 29. f3 Bc2 30. Rdc1 Rfc7 31. Nxc2 Rxc2 32. Kf1 f5 33. Ke2 e4 34. Kd1 R2c5 35. Rxc5 Rxc5 36. Rc1 Rd5 37. Rc2 Kf7 38. Ke2 Be5 39. h3 Bd6 40. Be1 Rc5 41. Rxc5 Bxc5 42. b3 Bd6 43. Bh4 Ke8 44. Kf2 Kd7 45. Bg3 Be7 46. Bb8 Bh4+ 47. Bg3 Bd8 48. Bf4 Ke6 49. Kg3 h4+ 50. Kf2 Kd5 51. g3 hxg3+ 52. Kxg3 Bb6 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.22"]
[Round "9"]
[White "Najdorf, Miguel"]
[Black "Andersson, Ulf"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E95"]
[EventDate "1971.01.12"]
[PlyCount "93"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Nf3 e5 7. O-O Nbd7 8. Re1 Re8 9. d5 a5 10. Bg5 h6 11. Bh4 g5 12. Bg3 Nh5 13. Nd2 Nf4 14. Bg4 Nc5 15. Bxc8 Qxc8 16. Nf1 f5 17. f3 Rf8 18. exf5 Qxf5 19. Ne4 b6 20. Ne3 Qg6 21. Qc2 Nfd3 22. Re2 Kh7 23. Rd1 Nxe4 24. fxe4 Nc5 25. Nf5 Rf7 26. Rf1 Raf8 27. Ref2 h5 28. Rf3 Bh6 29. Be1 g4 30. R3f2 Bg5 31. b4 axb4 32. Bxb4 Nd7 33. a4 Nf6 34. g3 Ne8 35. a5 bxa5 36. Bxa5 Ng7 37. Nxg7 Kxg7 38. Rf5 Rxf5 39. exf5 Qf7 40. Bd2 Qf6 41. h4 gxh3 42. Kh2 Bxd2 43. Qxd2 Qh6 44. Qf2 Qg5 45. c5 Rf7 46. cxd6 cxd6 47. Kxh3 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.22"]
[Round "9"]
[White "Olafsson, Fridrik"]
[Black "Hubner, Robert"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B39"]
[EventDate "1971.01.12"]
[PlyCount "81"]

1. Nf3 Nf6 2. c4 c5 3. Nc3 g6 4. d4 Bg7 5. e4 cxd4 6. Nxd4 Nc6 7. Be3 Ng4 8. Qxg4 Nxd4 9. Qd1 Ne6 10. Rc1 b6 11. Bd3 Bb7 12. O-O O-O 13. Bb1 d6 14. f4 Nc5 15. f5 Nd7 16. b3 Ne5 17. Nd5 e6 18. f6 exd5 19. fxg7 Re8 20. cxd5 Kxg7 21. Qd2 f6 22. Bd3 Qe7 23. Bd4 Rac8 24. Rce1 Rf8 25. Rf4 Rc7 26. Ref1 Bc8 27. h3 Bd7 28. Be2 h5 29. a4 Be8 30. R4f2 g5 31. Be3 Rg8 32. Rxf6 Qxf6 33. Rxf6 Kxf6 34. Bd4 Bf7 35. h4 Be8 36. hxg5+ Rxg5 37. Qf4+ Kg6 38. Qf8 Rc1+ 39. Kf2 Rc2 40. Qxe8+ Kh7 41. Bxe5 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.23"]
[Round "10"]
[White "Andersson, Ulf"]
[Black "Mecking, Henrique"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B08"]
[EventDate "1971.01.12"]
[PlyCount "83"]

1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. Be2 Nf6 5. Nc3 O-O 6. O-O Bg4 7. Be3 e5 8. Qd2 Nc6 9. dxe5 dxe5 10. Rad1 Qe7 11. Bg5 Bxf3 12. Bxf3 Nd4 13. Nd5 Qd6 14. c3 Nxf3+ 15. gxf3 Nxd5 16. Qxd5 Qa6 17. Kg2 Rab8 18. b4 Bf6 19. Be3 Rfd8 20. Qc5 Qxa2 21. Qxc7 Rdc8 22. Qd6 Qa6 23. Bxa7 Qxa7 24. Qxf6 Rxc3 25. Qxe5 Rcc8 26. Rd7 Qb6 27. Rfd1 Re8 28. Qf4 Rf8 29. Rxf7 Qe6 30. Rxf8+ Rxf8 31. Qd6 Qf7 32. Rd3 Re8 33. Rc3 Re7 34. b5 Rd7 35. Qe5 Qe7 36. Rc8+ Kf7 37. Qf4+ Ke6 38. b6 Qd6 39. Re8+ Re7 40. e5 Qc5 41. Qf6+ Kd7 42. e6+ 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.23"]
[Round "10"]
[White "Donner, Jan"]
[Black "Ree, Hans"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A36"]
[EventDate "1971.01.12"]
[PlyCount "67"]

1. c4 g6 2. g3 Bg7 3. Bg2 c5 4. Nc3 Nc6 5. e3 e6 6. Nge2 Nge7 7. O-O O-O 8. d4 cxd4 9. Nxd4 Nxd4 10. exd4 d5 11. cxd5 Nxd5 12. Nxd5 exd5 13. Bf4 Qb6 14. Be5 Qxb2 15. Bxg7 Kxg7 16. Bxd5 Bf5 17. Bg2 Rad8 18. d5 Rfe8 19. Qa4 a6 20. Rad1 Re2 21. Bf3 Rc2 22. g4 Bd7 23. Qf4 Qf6 24. Qg3 Rxa2 25. Be4 Re8 26. Rfe1 Ra4 27. f3 Ra2 28. Kh1 b5 29. Rc1 b4 30. Rc7 Rd8 31. g5 Qd4 32. Qd6 Bh3 33. Rxf7+ Kxf7 34. Bxg6+ 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.23"]
[Round "10"]
[White "Gligoric, Svetozar"]
[Black "Olafsson, Fridrik"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E42"]
[EventDate "1971.01.12"]
[PlyCount "41"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nge2 Ne4 6. Qc2 cxd4 7. exd4 d5 8. a3 Nxc3 9. Nxc3 Be7 10. cxd5 exd5 11. Nxd5 Nc6 12. Nxe7 Nxd4 13. Qc3 Qxe7+ 14. Be3 Nf5 15. Bb5+ Bd7 16. Bxd7+ Qxd7 17. Bc5 Ne7 18. O-O O-O 19. Rad1 Nd5 20. Bxf8 Rxf8 21. Qf3 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.23"]
[Round "10"]
[White "Hubner, Robert"]
[Black "Hort, Vlastimil"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A07"]
[EventDate "1971.01.12"]
[PlyCount "31"]

1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. O-O Bf5 5. d3 h6 6. b3 e6 7. Bb2 Be7 8. Nbd2 O-O 9. e3 a5 10. a4 Na6 11. Qe2 Nb4 12. Rfc1 Nd7 13. e4 Bh7 14. Nf1 Qc7 15. e5 b5 16. Ne1 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.23"]
[Round "10"]
[White "Korchnoi, Viktor"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A29"]
[EventDate "1971.01.12"]
[PlyCount "30"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Be6 7. O-O Nb6 8. d3 Be7 9. a3 O-O 10. b4 a6 11. Be3 f5 12. Rb1 Bf6 13. Na4 Nxa4 14. Qxa4 Nd4 15. Nxd4 exd4 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.23"]
[Round "10"]
[White "Lengyel, Levente"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E69"]
[EventDate "1971.01.12"]
[PlyCount "46"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. d4 d6 6. Nf3 Nbd7 7. O-O e5 8. e4 c6 9. h3 Qb6 10. Re1 Re8 11. d5 Nc5 12. Rb1 a5 13. Be3 Qc7 14. Nd2 Bd7 15. Bf1 Reb8 16. dxc6 bxc6 17. Bxc5 dxc5 18. Na4 Bf8 19. Nb3 Qa7 20. Qf3 Nh5 21. Qe3 Be8 22. Nbxc5 Rd8 23. Rbd1 Ng7 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.23"]
[Round "10"]
[White "Petrosian, Tigran"]
[Black "Kuijpers, Franciscus"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D45"]
[EventDate "1971.01.12"]
[PlyCount "70"]

1. Nf3 d5 2. c4 e6 3. d4 Nf6 4. Nc3 c6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Bb2 Re8 9. Be2 dxc4 10. bxc4 e5 11. O-O exd4 12. Nxd4 Qc7 13. g3 Nc5 14. Bf3 Bh3 15. Rfe1 Rad8 16. Rad1 Bg4 17. Nce2 Bxf3 18. Nxf3 Nce4 19. Nc3 Qc8 20. Nxe4 Nxe4 21. Kg2 Bf8 22. Rxd8 Qxd8 23. Rd1 Qa5 24. Bd4 h6 25. Rb1 b6 26. h3 Qa6 27. Ne5 Ng5 28. h4 Ne6 29. Ba1 Bd6 30. Nf3 Rd8 31. Rd1 Be7 32. Rxd8+ Bxd8 33. Nd4 Nxd4 34. Bxd4 Be7 35. h5 Bf8 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.23"]
[Round "10"]
[White "Van den Berg, Carel"]
[Black "Langeweg, Christian"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B48"]
[EventDate "1971.01.12"]
[PlyCount "52"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 a6 6. Be3 Qc7 7. Bd3 Nf6 8. O-O Ne5 9. h3 Bc5 10. Qe2 d6 11. f4 Ng6 12. Nb3 Bxe3+ 13. Qxe3 b5 14. Rae1 O-O 15. Nd4 Qc5 16. Nb3 Qc7 17. Nd4 b4 18. Nb1 e5 19. fxe5 dxe5 20. Nf5 Nf4 21. Nd2 Re8 22. Ng3 Be6 23. b3 Nd7 24. Bc4 Nb6 25. Bxe6 Rxe6 26. Rf2 Rc6 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.25"]
[Round "11"]
[White "Hort, Vlastimil"]
[Black "Gligoric, Svetozar"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B99"]
[EventDate "1971.01.12"]
[PlyCount "70"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. O-O-O Nbd7 10. g4 b5 11. Bxf6 Nxf6 12. g5 Nd7 13. Qh3 Nc5 14. b4 Na4 15. Nxa4 bxa4 16. g6 Bf6 17. gxf7+ Qxf7 18. e5 dxe5 19. Bg2 exd4 20. Bxa8 O-O 21. Qd3 Qc7 22. Be4 h6 23. Kb1 a5 24. Rhg1 axb4 25. Qg3 b3 26. cxb3 axb3 27. axb3 d3 28. Rxd3 Ba6 29. Rd2 Rb8 30. Rc1 Qb6 31. Ra2 Qd4 32. Bc2 Be2 33. f5 Be5 34. Qg6 Rxb3+ 35. Bxb3 Qd3+ {Time} 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.25"]
[Round "11"]
[White "Ivkov, Borislav"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D59"]
[EventDate "1971.01.12"]
[PlyCount "21"]

1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 Be7 5. Bg5 h6 6. Bh4 O-O 7. Rc1 b6 8. cxd5 Nxd5 9. Bxe7 Nxe7 10. e3 Bb7 11. Bd3 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.25"]
[Round "11"]
[White "Kuijpers, Franciscus"]
[Black "Van den Berg, Carel"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D80"]
[EventDate "1971.01.12"]
[PlyCount "31"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bg5 Ne4 5. Bh4 Nxc3 6. bxc3 c5 7. e3 Nc6 8. cxd5 Qxd5 9. Qf3 Qxf3 10. Nxf3 e6 11. Bf6 Rg8 12. Bb5 Bd7 13. O-O cxd4 14. cxd4 Be7 15. Bxe7 Kxe7 16. Rfc1 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.25"]
[Round "11"]
[White "Langeweg, Christian"]
[Black "Hubner, Robert"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B06"]
[EventDate "1971.01.12"]
[PlyCount "42"]

1. Nf3 g6 2. d4 Bg7 3. e4 d6 4. Nc3 Nc6 5. h3 e5 6. d5 Nce7 7. g4 c6 8. Be3 cxd5 9. Nxd5 Nxd5 10. Qxd5 Nf6 11. Bb5+ Ke7 12. Qd3 a6 13. Bc4 b5 14. Bb3 Bb7 15. Nd2 Rc8 16. f4 Nd7 17. Qf1 Rf8 18. Qf2 Nc5 19. Qh4+ Ke8 20. Qxh7 Nxb3 21. Nxb3 Bf6 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.25"]
[Round "11"]
[White "Mecking, Henrique"]
[Black "Lengyel, Levente"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E18"]
[EventDate "1971.01.12"]
[PlyCount "40"]

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. Bf4 d6 10. Qd2 Nd7 11. Qe3 Nf6 12. b4 Qc8 13. Nd2 Bxg2 14. Kxg2 Ng4 15. Qd3 e5 16. Be3 f5 17. f3 Nxe3+ 18. Qxe3 Bf6 19. d5 a5 20. b5 Qd7 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.25"]
[Round "11"]
[White "Najdorf, Miguel"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E45"]
[EventDate "1971.01.12"]
[PlyCount "101"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2 Ba6 6. Ng3 Bxc3+ 7. bxc3 d5 8. Ba3 dxc4 9. e4 Qd7 10. Be2 Nc6 11. O-O O-O-O 12. Qc2 h5 13. Rfd1 h4 14. Nf1 Na5 15. Bb4 Qc6 16. f3 Nh5 17. Ne3 Nf4 18. Bf1 Rh5 19. Qd2 Nd3 20. d5 Qa4 21. Kh1 Nb7 22. Bxd3 cxd3 23. c4 c5 24. dxc6 Qxc6 25. Qc3 h3 26. g4 Rhh8 27. Rxd3 Rxd3 28. Qxd3 Rd8 29. Qa3 Bxc4 30. Rc1 Kb8 31. Be1 b5 32. Nxc4 bxc4 33. Bg3+ Ka8 34. Bf2 a6 35. Qe3 Kb8 36. Qf4+ Ka8 37. Qe3 Kb8 38. Qf4+ Kc8 39. Qxf7 c3 40. Kg1 c2 41. Be3 Rd1+ 42. Kf2 Rxc1 43. Bxc1 Qc5+ 44. Ke2 Nd8 45. Qxg7 e5 46. Qf6 Nc6 47. Qe6+ Kc7 48. Qf7+ Kb6 49. Qb3+ Kc7 50. Qf7+ Kb6 51. Qb3+ 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.25"]
[Round "11"]
[White "Olafsson, Fridrik"]
[Black "Andersson, Ulf"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E92"]
[EventDate "1971.01.12"]
[PlyCount "208"]

1. Nf3 c5 2. c4 g6 3. d4 Bg7 4. d5 d6 5. Nc3 Nf6 6. e4 O-O 7. Be2 e5 8. h3 Na6 9. Bg5 Bd7 10. Nh2 h6 11. Be3 Kh7 12. h4 Nc7 13. h5 g5 14. Nf1 a6 15. Ng3 b5 16. b3 Rb8 17. a3 Rb7 18. O-O Kh8 19. Qc2 Qe7 20. Bd2 Rfb8 21. Rfb1 Bf8 22. Nd1 bxc4 23. bxc4 Nce8 24. Ne3 Ng7 25. Ba5 Bc8 26. Qd1 Rb2 27. Rxb2 Rxb2 28. Bc3 Rb7 29. Bd3 Qe8 30. Be2 Be7 31. Rb1 Qd7 32. Bd3 Rxb1 33. Bxb1 Qb7 34. Bc2 Bd7 35. Qf3 Qc8 36. Nef5 Nxf5 37. exf5 Kg8 38. Kf1 Qe8 39. Qd1 Qb8 40. Ke1 Bd8 41. Nf1 Bc7 42. Ne3 Qd8 43. Kf1 Ba5 44. Ba1 Qf8 45. g3 Bd8 46. Bc3 Be7 47. Ke1 Qg7 48. Bd3 g4 49. Be2 Nxh5 50. Bxg4 Nf6 51. Bh3 Qg5 52. Bd2 Ne4 53. Bc1 Bd8 54. Kf1 Ba5 55. Kg2 h5 56. Qc2 Nf6 57. Ng4 Qg7 58. Nxf6+ Qxf6 59. Qb3 Bd8 60. Bd2 Kf8 61. Qb8 Kg7 62. f4 e4 63. Bc1 Qe7 64. Qb3 f6 65. Bd2 a5 66. Kf2 a4 67. Qc2 Kf8 68. Ke3 Kg7 69. Qd1 Qe8 70. Qh1 Kf8 71. Bc3 Kg7 72. Qb1 Kf8 73. Qb8 Be7 74. Qb2 Kg7 75. Kxe4 Qc8 76. Qb1 Qa6 77. Kd3 Qc8 78. Ke3 Kf8 79. Kf2 Kg7 80. Qc2 Kf7 81. Kg1 Qh8 82. Bf1 Qg7 83. Qh2 Kf8 84. Bd3 Be8 85. Qh3 Bd8 86. Qh4 Qe7 87. Kf2 Qg7 88. Bc2 Qf7 89. Qh1 Qg7 90. Bd1 Qf7 91. Qe4 Qc7 92. Kg2 Be7 93. Kh3 Qc8 94. Kh4 Bd7 95. Bc2 Be8 96. Bd1 Bd7 97. Bxh5 Bxf5 98. Qe2 Qb7 99. g4 Be4 100. g5 f5 101. Bf3 Bxf3 102. Qxf3 Qb1 103. Kh5 Qc2 104. Kg6 Ke8 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.25"]
[Round "11"]
[White "Ree, Hans"]
[Black "Korchnoi, Viktor"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A16"]
[EventDate "1971.01.12"]
[PlyCount "127"]

1. c4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. Nc3 Nc6 7. d3 Nh5 8. Rb1 a6 9. Bd2 e5 10. b4 Kh8 11. Nd5 Ne7 12. Qc2 h6 13. a4 Kh7 14. Rfc1 f5 15. b5 f4 16. Nxe7 Qxe7 17. c5 axb5 18. cxd6 cxd6 19. Rxb5 Ra6 20. Bb4 Rc6 21. Qb1 Qc7 22. Ba3 Nf6 23. Nd2 Rxc1+ 24. Qxc1 Qxc1+ 25. Bxc1 fxg3 26. hxg3 Bd7 27. Rxb7 Bxa4 28. Ba3 Rd8 29. Nc4 Ne8 30. Bd5 h5 31. Bf7 Kh6 32. Bxe8 Rxe8 33. Nxd6 Ra8 34. Bb2 Bc6 35. Rc7 Bd5 36. e4 Bb3 37. Rb7 Rd8 38. Rb6 Kh7 39. Rxb3 Rxd6 40. Rb7 Re6 41. f4 Kg8 42. Kf2 Bf6 43. Bxe5 Bxe5 44. fxe5 Rxe5 45. Kf3 g5 46. d4 Ra5 47. e5 Ra3+ 48. Ke4 h4 49. gxh4 gxh4 50. d5 h3 51. e6 h2 52. Rb1 Rg3 53. Rh1 Rh3 54. d6 Kf8 55. Ke5 Rh5+ 56. Kf6 Rh6+ 57. Kf5 Rh3 58. Kg6 Re3 59. Kf6 Re2 60. Rb1 Rf2+ 61. Ke5 Re2+ 62. Kd5 Rd2+ 63. Kc6 Rb2 64. e7+ 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.26"]
[Round "12"]
[White "Andersson, Ulf"]
[Black "Hort, Vlastimil"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B48"]
[EventDate "1971.01.12"]
[PlyCount "119"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Qc7 6. Be3 a6 7. Bd3 Nf6 8. O-O Ne5 9. h3 Bc5 10. Qe2 d6 11. f4 Ned7 12. Kh1 O-O 13. Nb3 Bxe3 14. Qxe3 b5 15. a3 Bb7 16. Nd4 Qc5 17. Rae1 Rfd8 18. Kh2 Rac8 19. g4 g6 20. Rf2 Kg7 21. Ree2 Rc7 22. Kg3 Nb6 23. Nf3 Nfd7 24. Qc1 Re8 25. Nd2 Rcc8 26. Nb3 Qc7 27. h4 Na4 28. Nxa4 bxa4 29. Nd2 Nc5 30. Qd1 Bc6 31. h5 Nxd3 32. cxd3 Bb5 33. Nf3 Qc1 34. Rd2 gxh5 35. g5 Qxd1 36. Rxd1 h6 37. Rh2 hxg5 38. Nxg5 f6 39. Nf3 Rh8 40. Nd4 Kf7 41. Kf3 Be8 42. Rg1 Ke7 43. e5 dxe5 44. fxe5 fxe5 45. Nc2 Rb8 46. Nb4 a5 47. Na2 Bc6+ 48. Ke3 h4 49. Nc3 h3 50. Rg7+ Kd6 51. Rg4 Rbf8 52. Rg3 Bg2 53. Nxa4 Rfg8 54. Rxg8 Rxg8 55. Nc3 Rg3+ 56. Kd2 e4 57. dxe4 Ke5 58. b4 Bxe4 59. Nxe4 Kxe4 60. Re2+ 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.26"]
[Round "12"]
[White "Donner, Jan"]
[Black "Korchnoi, Viktor"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D72"]
[EventDate "1971.01.12"]
[PlyCount "106"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5 6. e4 Nb6 7. Ne2 Bg4 8. Nbc3 Nc6 9. d5 Nd4 10. h3 Bf3 11. Bxf3 Nxf3+ 12. Kf1 c6 13. Kg2 Ne5 14. f4 Ned7 15. dxc6 bxc6 16. Qc2 O-O 17. Be3 Qc7 18. Rad1 Qb7 19. g4 c5 20. Kh2 Rac8 21. b3 Rfe8 22. Ng3 Bd4 23. Qd2 e5 24. f5 Qc6 25. Rhe1 a5 26. Rc1 a4 27. Qf2 axb3 28. axb3 Ra8 29. Rf1 Kh8 30. Qf3 Ra3 31. Nce2 Qf6 32. fxg6 Qxf3 33. g7+ Kg8 34. Rxf3 Rxb3 35. Nf5 Bxe3 36. Nxe3 Rb2 37. Rf2 Kxg7 38. Nf5+ Kf8 39. Rcf1 Re6 40. g5 Nc4 41. Nh6 Ke8 42. Ng3 Reb6 43. Rxb2 Rxb2+ 44. Kh1 Nd6 45. Rd1 Rb6 46. Kg2 c4 47. Nhf5 Nxf5 48. Nxf5 c3 49. Nd6+ Kd8 50. Nc4 Rb4 51. Nxe5 c2 52. Nxf7+ Ke7 53. Rc1 Rb2 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.26"]
[Round "12"]
[White "Gligoric, Svetozar"]
[Black "Langeweg, Christian"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E56"]
[EventDate "1971.01.12"]
[PlyCount "44"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Nc6 9. a3 Ba5 10. Bd3 cxd4 11. exd4 Bb6 12. Be3 Nd5 13. Nxd5 Qxd5 14. Qc2 Qh5 15. Rad1 Bd7 16. Be2 Rac8 17. Ng5 Qg6 18. Qb3 h6 19. Nf3 Rfd8 20. Bd3 Qf6 21. Bb1 Ne7 22. Ne5 Bc6 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.26"]
[Round "12"]
[White "Hubner, Robert"]
[Black "Kuijpers, Franciscus"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "C87"]
[EventDate "1971.01.12"]
[PlyCount "71"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. d4 Nf6 7. Nbd2 Be7 8. O-O O-O 9. Re1 Re8 10. Nf1 h6 11. d5 Na7 12. Bc2 c5 13. dxc6 bxc6 14. a4 a5 15. b4 axb4 16. cxb4 d5 17. exd5 Bxb4 18. Bd2 Bxd2 19. N1xd2 cxd5 20. Nxe5 Nc6 21. Ndf3 Qa5 22. Bb3 Nxe5 23. Nxe5 Red8 24. Re3 Be8 25. Rd3 Rab8 26. h3 Rb6 27. Rg3 Re6 28. Qd4 Rb8 29. Ng4 Nh5 30. Rf3 Kf8 31. Qd3 Re1+ 32. Rxe1 Qxe1+ 33. Kh2 Qe4 34. Qc3 Nf4 35. Bc2 Qb4 36. Qe5 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.26"]
[Round "12"]
[White "Lengyel, Levente"]
[Black "Olafsson, Fridrik"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D72"]
[EventDate "1971.01.12"]
[PlyCount "94"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5 6. e4 Nb4 7. d5 c6 8. Ne2 cxd5 9. exd5 Bf5 10. Qa4+ N8c6 11. Nbc3 Bc2 12. b3 b5 13. Nxb5 O-O 14. Nbc3 Nd3+ 15. Kf1 Ncb4 16. a3 Rc8 17. axb4 Bxc3 18. Nxc3 Nxc1 19. Rxc1 Rxc3 20. Re1 Qb6 21. Be4 Bxe4 22. Rxe4 Rc1+ 23. Kg2 Rxh1 24. Kxh1 Qxf2 25. Rf4 Qd2 26. Qd7 Qe3 27. Kg2 Rb8 28. Rc4 Kg7 29. Qc7 Rb6 30. Qxa7 Qd2+ 31. Kg1 Qd1+ 32. Kf2 Qd2+ 33. Kg1 Qe1+ 34. Kg2 Qe2+ 35. Kg1 Rf6 36. Rf4 Ra6 37. Qf2 Qd1+ 38. Qf1 Qxf1+ 39. Kxf1 Rb6 40. Ke2 Rb5 41. Rd4 Kf6 42. d6 exd6 43. Rxd6+ Ke5 44. Rd7 Rxb4 45. Rxf7 Rxb3 46. Rxh7 Kf5 47. Kf2 g5 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.26"]
[Round "12"]
[White "Najdorf, Miguel"]
[Black "Mecking, Henrique"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E97"]
[EventDate "1971.01.12"]
[PlyCount "115"]

1. Nf3 Nf6 2. d4 g6 3. c4 Bg7 4. Nc3 O-O 5. e4 d6 6. Be2 Nc6 7. O-O e5 8. d5 Ne7 9. Nd2 c5 10. a3 Ne8 11. b4 b6 12. bxc5 bxc5 13. Nb3 f5 14. Bd2 Kh8 15. Rb1 Ng8 16. Nc1 Ngf6 17. f3 f4 18. Nd3 Nh5 19. Be1 Bf6 20. Bf2 Bh4 21. Bxh4 Qxh4 22. Qa4 Qd8 23. Rb2 Bd7 24. Qa6 Ng3 25. Rfb1 Nxe2+ 26. Rxe2 g5 27. h3 h5 28. Reb2 g4 29. hxg4 hxg4 30. fxg4 Qh4 31. Rf1 Rd8 32. g5 Qg3 33. Qa5 Ng7 34. Ne1 Qxg5 35. Nf3 Qh6 36. Kf2 Bg4 37. Ke1 Rd7 38. Kd2 Kg8 39. Kc1 Nh5 40. Kb1 Ng3 41. Re1 Qh5 42. Qa4 Rg7 43. Qd1 Rff7 44. Qd3 Rb7 45. Rxb7 Rxb7+ 46. Ka2 Kf8 47. Rb1 Qh7 48. Nd2 Qc7 49. Rxb7 Qxb7 50. Nf1 Nh5 51. Nh2 Bc8 52. Qf3 Ng3 53. Nf1 Nxf1 54. Qxf1 a6 55. g3 Qf7 56. gxf4 Qxf4 57. Qh1 Ke7 58. Kb3 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.26"]
[Round "12"]
[White "Petrosian, Tigran"]
[Black "Ree, Hans"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A29"]
[EventDate "1971.01.12"]
[PlyCount "15"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bb4 5. Nd5 Nxd5 6. cxd5 e4 7. dxc6 exf3 8. Qb3 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.26"]
[Round "12"]
[White "Van den Berg, Carel"]
[Black "Ivkov, Borislav"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B06"]
[EventDate "1971.01.12"]
[PlyCount "58"]

1. e4 g6 2. d4 Bg7 3. c3 d6 4. f4 Nf6 5. e5 Nd5 6. Bc4 Nb6 7. Bb3 dxe5 8. fxe5 c5 9. Nf3 O-O 10. O-O cxd4 11. cxd4 Nc6 12. Nc3 Bg4 13. Ne2 Na5 14. Bc2 Qc7 15. h3 Bxf3 16. Rxf3 Rad8 17. Bf4 Nd5 18. Bg3 Qb6 19. Rb1 Nb4 20. Bb3 Nac6 21. Qf1 Nxd4 22. Nxd4 Qxd4+ 23. Kh1 e6 24. Rd1 Qb6 25. Rxd8 Qxd8 26. Qb5 Qb6 27. Qxb6 axb6 28. Bf2 Bxe5 29. Bxb6 Rc8 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.27"]
[Round "13"]
[White "Hort, Vlastimil"]
[Black "Lengyel, Levente"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "C85"]
[EventDate "1971.01.12"]
[PlyCount "81"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Bxc6 dxc6 7. d3 Nd7 8. Nbd2 O-O 9. Nc4 f6 10. Nh4 Nc5 11. Qf3 Re8 12. Qg3 Kh8 13. Be3 Ne6 14. Nf5 Bf8 15. a4 c5 16. f4 exf4 17. Bxf4 Nxf4 18. Qxf4 Be6 19. Nce3 Bd6 20. Nxd6 cxd6 21. a5 d5 22. exd5 Bxd5 23. Nf5 Qd7 24. Rae1 Re6 25. Rxe6 Bxe6 26. Nd6 Rd8 27. Ne4 Qd4+ 28. Qf2 Rc8 29. Re1 Bg8 30. b3 Re8 31. Qxd4 cxd4 32. Kf2 Bd5 33. Re2 Re5 34. g3 Kg8 35. Nd6 Kf8 36. b4 g6 37. Nc4 Rxe2+ 38. Kxe2 Ke7 39. Kd2 Ke6 40. Nb6 Bc6 41. c4 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.27"]
[Round "13"]
[White "Ivkov, Borislav"]
[Black "Hubner, Robert"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E66"]
[EventDate "1971.01.12"]
[PlyCount "60"]

1. c4 g6 2. d4 Bg7 3. g3 Nf6 4. Bg2 O-O 5. Nc3 c5 6. Nf3 Nc6 7. O-O d6 8. d5 Na5 9. Nd2 e5 10. a3 b6 11. b4 Nb7 12. Bb2 Ng4 13. h3 Nh6 14. e3 Bd7 15. Qc2 f5 16. f4 Nf7 17. Nb3 g5 18. bxc5 dxc5 19. a4 exf4 20. exf4 Nfd6 21. Qd3 Re8 22. Rf2 gxf4 23. Rxf4 Qg5 24. Nd2 Bd4+ 25. Rxd4 cxd4 26. Nd1 Re1+ 27. Kh2 f4 28. g4 f3 29. Bxf3 Nf5 30. Nf1 Qf4+ 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.27"]
[Round "13"]
[White "Korchnoi, Viktor"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A07"]
[EventDate "1971.01.12"]
[PlyCount "84"]

1. g3 d5 2. Nf3 c6 3. Bg2 Nf6 4. O-O Bg4 5. d3 Nbd7 6. h3 Bxf3 7. Bxf3 e6 8. Bg2 Qc7 9. c4 dxc4 10. dxc4 Be7 11. Nc3 O-O 12. Qc2 Rfd8 13. Na4 Nc5 14. Be3 Qa5 15. Nc3 Qb4 16. b3 e5 17. Qb2 Ne6 18. a3 Qa5 19. b4 Qc7 20. Rac1 g6 21. Rfd1 Rxd1+ 22. Rxd1 h5 23. Rc1 Nd4 24. Bg5 Rc8 25. h4 Ng4 26. f3 Nf6 27. e3 Ne6 28. Bh3 Nxg5 29. hxg5 Nd7 30. Ne4 Rd8 31. Qc2 Nf8 32. Rd1 Rxd1+ 33. Qxd1 a5 34. Qd2 axb4 35. axb4 b6 36. Kg2 Qd8 37. Qxd8 Bxd8 38. f4 exf4 39. exf4 Kg7 40. Kf3 Be7 41. b5 cxb5 42. cxb5 Nh7 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.27"]
[Round "13"]
[White "Kuijpers, Franciscus"]
[Black "Gligoric, Svetozar"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B93"]
[EventDate "1971.01.12"]
[PlyCount "63"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 Qc7 7. Bd3 g6 8. a4 Bg7 9. Nf3 Nc6 10. O-O O-O 11. Qe1 Nb4 12. Qh4 Qc5+ 13. Kh1 Qh5 14. Qxh5 Nxh5 15. Be3 Bh6 16. Nd2 e5 17. g3 Bh3 18. Rf3 Bg4 19. Rf2 Be6 20. Re1 exf4 21. gxf4 f5 22. Bc4 Rae8 23. exf5 gxf5 24. Bc5 dxc5 25. Rxe6 Rxe6 26. Bxe6+ Kh8 27. Nf1 Nxf4 28. Bd7 Rf7 29. Bc8 Nc6 30. Ng3 Nd4 31. Nd1 Nh3 32. Rf1 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.27"]
[Round "13"]
[White "Langeweg, Christian"]
[Black "Andersson, Ulf"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B08"]
[EventDate "1971.01.12"]
[PlyCount "96"]

1. d4 g6 2. e4 Bg7 3. Nf3 d6 4. Be2 Nf6 5. Nc3 O-O 6. O-O Bg4 7. Be3 Nc6 8. Qd2 Bxf3 9. Bxf3 Nd7 10. Rad1 Nb6 11. Be2 e5 12. d5 Nd4 13. Bxd4 exd4 14. Nb5 Re8 15. f3 a6 16. Nxd4 Nxd5 17. Nf5 Nb6 18. Nxg7 Kxg7 19. Qc3+ f6 20. Rd4 Qd7 21. Rfd1 Qc6 22. Qd2 Re7 23. Kh1 Rae8 24. Bf1 Qc5 25. a4 a5 26. Bb5 c6 27. Bf1 d5 28. b4 axb4 29. Qxb4 Nd7 30. Qxc5 Nxc5 31. exd5 cxd5 32. Kg1 Rc8 33. R1d2 b6 34. Bb5 Ra8 35. Bc6 Raa7 36. Kf2 f5 37. Rb4 Rec7 38. Bb5 Ne6 39. Be2 Kf7 40. Rxd5 Rxc2 41. Ke1 Nc5 42. Rxb6 Nxa4 43. Ra6 Rc1+ 44. Kf2 Re7 45. Rd2 Nc5 46. Raa2 Rc7 47. Ra3 Ne6 48. Ra4 Kf6 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.27"]
[Round "13"]
[White "Mecking, Henrique"]
[Black "Donner, Jan"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E52"]
[EventDate "1971.01.12"]
[PlyCount "33"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 b6 7. a3 Be7 8. cxd5 exd5 9. b4 c5 10. dxc5 bxc5 11. bxc5 Bxc5 12. O-O Qe7 13. Bb2 Nc6 14. Qa4 Bb7 15. Rac1 Bd6 16. Qh4 Ne5 17. Nxe5 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.27"]
[Round "13"]
[White "Olafsson, Fridrik"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A49"]
[EventDate "1971.01.12"]
[PlyCount "39"]

1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 O-O 5. Bg2 d6 6. d4 Nbd7 7. O-O e5 8. dxe5 Ng4 9. Na3 dxe5 10. h3 Nh6 11. e4 f6 12. Nc4 Nb6 13. Qxd8 Rxd8 14. Na5 Bf8 15. a3 Nf7 16. Rfd1 Re8 17. Ne1 Rb8 18. Nd3 Nd7 19. Bc1 Nc5 20. Be3 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.27"]
[Round "13"]
[White "Ree, Hans"]
[Black "Van den Berg, Carel"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A33"]
[EventDate "1971.01.12"]
[PlyCount "39"]

1. c4 Nf6 2. Nf3 c5 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Qb6 7. Nb3 Ne5 8. e4 Bb4 9. Qe2 Bxc3+ 10. bxc3 d6 11. f4 Ng6 12. Bg2 O-O 13. Be3 Qa6 14. c5 Qxe2+ 15. Kxe2 dxc5 16. e5 Nd5 17. Bxc5 Re8 18. c4 Nb6 19. Na5 Bd7 20. Bd6 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.28"]
[Round "14"]
[White "Andersson, Ulf"]
[Black "Kuijpers, Franciscus"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B81"]
[EventDate "1971.01.12"]
[PlyCount "81"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g4 a6 7. g5 Nfd7 8. Bg2 Nc6 9. f4 Qb6 10. Nb3 Be7 11. Qe2 Qc7 12. Be3 b5 13. O-O-O Bb7 14. h4 b4 15. Nd5 exd5 16. exd5 Na5 17. Nxa5 Qxa5 18. Bd4 Kd8 19. Rhe1 Re8 20. Rd3 Qb5 21. Bxg7 Nc5 22. Re3 Qxe2 23. R1xe2 Bc8 24. Bd4 Bg4 25. Re1 Rc8 26. Bf6 Rc7 27. Kd2 Na4 28. Bd4 Bf5 29. Be4 Bxe4 30. Rxe4 Nc5 31. R4e3 Rg8 32. f5 Rd7 33. a3 a5 34. axb4 axb4 35. f6 Bf8 36. Re8+ Kc7 37. Ra1 Rd8 38. Ra7+ Kb8 39. Rxd8+ Kxa7 40. Rd7+ Ka6 41. Rxf7 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.28"]
[Round "14"]
[White "Donner, Jan"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E94"]
[EventDate "1971.01.12"]
[PlyCount "26"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 Nbd7 7. Qd2 c6 8. Nf3 e5 9. O-O Re8 10. d5 c5 11. Ne1 Qe7 12. Nd3 Qf8 13. f3 a6 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.28"]
[Round "14"]
[White "Gligoric, Svetozar"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A40"]
[EventDate "1971.01.12"]
[PlyCount "22"]

1. d4 e6 2. c4 Bb4+ 3. Bd2 Qe7 4. e4 Nf6 5. e5 Ne4 6. Nf3 Nxd2 7. Nbxd2 c5 8. a3 Bxd2+ 9. Qxd2 cxd4 10. Qxd4 Nc6 11. Qe3 b6 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.28"]
[Round "14"]
[White "Hubner, Robert"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B86"]
[EventDate "1971.01.12"]
[PlyCount "47"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 Be7 7. Be3 O-O 8. Bb3 Na6 9. f4 Nc5 10. Qf3 a6 11. O-O-O Qc7 12. g4 b5 13. e5 dxe5 14. fxe5 Nfe4 15. Bf4 Bb7 16. Rhe1 Nxc3 17. Qxc3 Rfc8 18. Qe3 Be4 19. c3 Nxb3+ 20. axb3 Bg6 21. Re2 Rd8 22. Red2 Bc5 23. Qf3 Rac8 24. h4 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.28"]
[Round "14"]
[White "Lengyel, Levente"]
[Black "Langeweg, Christian"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A17"]
[EventDate "1971.01.12"]
[PlyCount "44"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 Bb4 4. Qc2 c5 5. a3 Ba5 6. g3 Nc6 7. Bg2 O-O 8. O-O d6 9. Rb1 Bxc3 10. bxc3 Qc7 11. d3 Bd7 12. e4 Rac8 13. Nh4 Ne8 14. f4 f5 15. exf5 exf5 16. Bd5+ Kh8 17. Qg2 g6 18. Rb2 Nf6 19. Re2 Rce8 20. Bf3 Rxe2 21. Qxe2 Re8 22. Qc2 Ne7 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.28"]
[Round "14"]
[White "Mecking, Henrique"]
[Black "Olafsson, Fridrik"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E41"]
[EventDate "1971.01.12"]
[PlyCount "28"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 Bxc3+ 7. bxc3 d6 8. e4 e5 9. d5 Ne7 10. g3 h6 11. h4 Bg4 12. Qa4+ Bd7 13. Qb3 Qc7 14. Ng1 Nh7 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.28"]
[Round "14"]
[White "Najdorf, Miguel"]
[Black "Hort, Vlastimil"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D94"]
[EventDate "1971.01.12"]
[PlyCount "22"]

1. d4 Nf6 2. c4 c6 3. Nc3 d5 4. e3 g6 5. Nf3 Bg7 6. Bd3 Bf5 7. O-O O-O 8. b3 Nbd7 9. Bb2 Bxd3 10. Qxd3 e6 11. Rad1 Qa5 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.28"]
[Round "14"]
[White "Van den Berg, Carel"]
[Black "Korchnoi, Viktor"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A61"]
[EventDate "1971.01.12"]
[PlyCount "44"]

1. d4 Nf6 2. c4 e6 3. Nc3 c5 4. d5 exd5 5. cxd5 d6 6. Nf3 g6 7. Nd2 Bg7 8. Nc4 O-O 9. Bf4 Ne8 10. Qd2 Bxc3 11. bxc3 b5 12. Nb2 Bb7 13. g3 Nd7 14. Bg2 f5 15. O-O c4 16. Rae1 Ndf6 17. h4 Qd7 18. e4 fxe4 19. Bxe4 Nxe4 20. Rxe4 Nf6 21. Re6 Nxd5 22. Rxd6 Qh3 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.30"]
[Round "15"]
[White "Hort, Vlastimil"]
[Black "Mecking, Henrique"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D19"]
[EventDate "1971.01.12"]
[PlyCount "72"]

1. d4 Nf6 2. Nf3 d5 3. c4 c6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O O-O 9. Qe2 Bg4 10. h3 Bh5 11. Rd1 Nbd7 12. e4 Qe7 13. g4 Bg6 14. Bg5 h6 15. Bh4 e5 16. d5 Rfe8 17. Nd2 Bh7 18. Rac1 Nf8 19. Bg3 Ng6 20. Qf3 Rad8 21. dxc6 bxc6 22. Nf1 Rxd1 23. Rxd1 Bxc3 24. bxc3 Qa3 25. Rd7 Rf8 26. Rc7 Qxa4 27. Nd2 Qc2 28. Qe3 Nf4 29. Bxf4 exf4 30. Qxf4 Qc1+ 31. Bf1 Nxe4 32. Rd7 a5 33. Kg2 Nf6 34. Ra7 Be4+ 35. Kg3 Bg6 36. Bg2 Rd8 {Time} 0-1

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.30"]
[Round "15"]
[White "Ivkov, Borislav"]
[Black "Andersson, Ulf"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D77"]
[EventDate "1971.01.12"]
[PlyCount "68"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d5 6. c4 dxc4 7. Qa4 Nc6 8. Rd1 Nd7 9. Qxc4 Nb6 10. Qb3 a5 11. Nc3 a4 12. Qc2 Bf5 13. Qd2 Nc4 14. Qf4 Bc2 15. d5 b5 16. Nxb5 Bxd1 17. Qxc4 a3 18. Nc3 Na5 19. Qd3 Bb3 20. Nd2 Rb8 21. axb3 axb2 22. Bxb2 Nxb3 23. Ra2 c6 24. Nxb3 Rxb3 25. Qc2 Qb6 26. dxc6 e6 27. Na4 Qb4 28. h4 Rc8 29. Bxg7 Kxg7 30. Qd2 Qb5 31. Qd4+ Kg8 32. Rb2 Rxb2 33. Nxb2 e5 34. Qd7 Rf8 {Time} 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.30"]
[Round "15"]
[White "Korchnoi, Viktor"]
[Black "Hubner, Robert"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A42"]
[EventDate "1971.01.12"]
[PlyCount "81"]

1. c4 g6 2. d4 Bg7 3. Nc3 d6 4. e4 e5 5. Nf3 Bg4 6. d5 a5 7. Be2 Na6 8. O-O Ne7 9. a3 O-O 10. Rb1 c5 11. Bd2 Bd7 12. Nb5 Nc8 13. b3 h6 14. g3 Nc7 15. Nh4 Nxb5 16. cxb5 Ne7 17. b4 cxb4 18. axb4 a4 19. Ra1 f5 20. exf5 g5 21. Ng2 Nxf5 22. Be3 Nxe3 23. fxe3 Rxf1+ 24. Bxf1 Qf6 25. e4 Re8 26. Qd2 Qf3 27. Bd3 Bf6 28. Ne1 Qh5 29. Be2 Qg6 30. Qe3 Ra8 31. Nc2 Bd8 32. Bd3 Qe8 33. Na3 Bh3 34. Be2 Qd7 35. Kh1 Rc8 36. Nc4 Ra8 37. Rg1 Qxb5 38. g4 Qxb4 39. Qxh3 Kg7 40. Qf3 Be7 41. Ne3 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.30"]
[Round "15"]
[White "Kuijpers, Franciscus"]
[Black "Lengyel, Levente"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E81"]
[EventDate "1971.01.12"]
[PlyCount "77"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 c6 6. Be3 a6 7. Bd3 b5 8. Nge2 Nbd7 9. b3 O-O 10. O-O e5 11. d5 cxd5 12. cxd5 Nc5 13. Bc2 b4 14. Na4 Nxa4 15. bxa4 Nd7 16. a3 bxa3 17. Rxa3 f5 18. exf5 gxf5 19. f4 e4 20. g4 fxg4 21. Bxe4 Re8 22. Bb1 Nf6 23. Ng3 Qa5 24. Qd3 Rb8 25. Bd4 Re1 26. Rc3 Rxf1+ 27. Nxf1 Qxd5 28. Ne3 Qe6 29. Bc2 Kf8 30. Bb3 Qe7 31. Qc4 d5 32. Qd3 Qe4 33. Qd1 Be6 34. Rc6 Bd7 35. Bc2 Qxf4 36. Rxa6 g3 37. Ng2 gxh2+ 38. Kh1 Qg4 39. Qa1 {Time} 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.30"]
[Round "15"]
[White "Langeweg, Christian"]
[Black "Najdorf, Miguel"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E75"]
[EventDate "1971.01.12"]
[PlyCount "148"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. d5 e6 8. Qd2 exd5 9. exd5 Re8 10. Nf3 Bg4 11. O-O Nbd7 12. h3 Bxf3 13. Bxf3 Qb6 14. Qc2 h6 15. Bd2 a6 16. b3 Re7 17. Rae1 Rae8 18. Rxe7 Rxe7 19. Bd1 Qd8 20. a4 Ne8 21. g4 Nef6 22. Qc1 Kh7 23. Bc2 Qe8 24. f4 Ng8 25. Re1 Rxe1+ 26. Qxe1 Qxe1+ 27. Bxe1 Ngf6 28. Kf2 Kg8 29. Bd2 Kf8 30. Kf3 Ke7 31. a5 b6 32. axb6 Nxb6 33. Ne2 Nbd7 34. Ng3 Ne8 35. h4 Nf8 36. h5 Nf6 37. hxg6 fxg6 38. Nf1 N6d7 39. Ne3 Bd4 40. Ng2 Kf7 41. Ba5 Bf6 42. Bc7 Be7 43. Ne1 Nf6 44. Kg3 Ne8 45. Ba5 Bf6 46. Nf3 Nd7 47. Nh4 Nf8 48. Bd2 Bg7 49. Nf3 Bf6 50. Ba5 Nd7 51. Nd2 Bb2 52. Ne4 Ndf6 53. Nf2 Nd7 54. Nd3 Bd4 55. Bd2 Bf6 56. Ne1 Bd8 57. Nf3 Nf8 58. g5 hxg5 59. fxg5 Ng7 60. Nh4 Ne8 61. Be4 Ng7 62. Kg4 Ne8 63. Nf3 Nd7 64. Bc3 Nf8 65. Ne1 Nh7 66. Bd2 Nf8 67. Nd3 a5 68. Nf4 Ng7 69. Bc3 Bc7 70. Bxg7 Kxg7 71. Bxg6 Nxg6 72. Ne6+ Kg8 73. Nxc7 Ne5+ 74. Kf5 Nf3 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.30"]
[Round "15"]
[White "Olafsson, Fridrik"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E06"]
[EventDate "1971.01.12"]
[PlyCount "84"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Be7 5. g3 O-O 6. Bg2 Nbd7 7. Qd3 dxc4 8. Qxc4 a6 9. Qd3 c5 10. O-O cxd4 11. Qxd4 Nc5 12. Bf4 Qxd4 13. Nxd4 Rd8 14. Rfd1 Bd7 15. Bc7 Rdc8 16. Bb6 a5 17. Rd2 a4 18. a3 Bd8 19. Bxd8 Rxd8 20. Rad1 Kf8 21. f4 Ke7 22. e4 Ne8 23. e5 Nc7 24. Kf2 Rab8 25. Ke3 Na8 26. Nc2 Nb6 27. Rd4 Bc6 28. Bf3 Bxf3 29. Kxf3 Rxd4 30. Rxd4 Rd8 31. Rb4 Nd5 32. Nxd5+ Rxd5 33. Ne3 Rd2 34. Rb5 b6 35. Rxb6 Kd7 36. Nc4 Rxh2 37. Rb5 Kc6 38. Rb8 f6 39. Rg8 Kb5 40. Nd6+ Kc6 41. Rc8+ Kd5 42. Rd8 Kc6 1/2-1/2

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.30"]
[Round "15"]
[White "Petrosian, Tigran"]
[Black "Van den Berg, Carel"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B10"]
[EventDate "1971.01.12"]
[PlyCount "69"]

1. Nf3 d5 2. g3 g6 3. Bg2 Bg7 4. O-O e5 5. d3 Ne7 6. Nbd2 O-O 7. e4 c6 8. Re1 d4 9. a4 a5 10. Bf1 c5 11. c3 Nec6 12. Nc4 Na6 13. h4 h6 14. h5 g5 15. Be2 Be6 16. Nfd2 Nc7 17. Bg4 dxc3 18. bxc3 Qxd3 19. Bxe6 Nxe6 20. Re3 Qd8 21. Rb1 Rb8 22. Qe2 Ne7 23. Nb6 Qc7 24. Ndc4 Rfd8 25. Nxa5 Nc8 26. Nac4 Nxb6 27. Nxb6 Qc6 28. a5 Nc7 29. Ba3 Bf8 30. Kg2 Be7 31. Nc4 f6 32. Rb6 Qa4 33. Qa2 Kg7 34. Rf3 Rd7 35. Nxe5 1-0

[Event "33rd Hoogovens it"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.30"]
[Round "15"]
[White "Ree, Hans"]
[Black "Gligoric, Svetozar"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E67"]
[EventDate "1971.01.12"]
[PlyCount "62"]

1. c4 g6 2. g3 Bg7 3. Bg2 Nf6 4. Nf3 O-O 5. O-O d6 6. Nc3 e5 7. d4 Nbd7 8. Qc2 exd4 9. Nxd4 Nb6 10. Rd1 Nxc4 11. Ncb5 a6 12. Qxc4 axb5 13. Nxb5 Ne8 14. Nc3 c6 15. e4 Bg4 16. Re1 Qd7 17. Bf4 Nc7 18. a3 Rfd8 19. Rac1 Ne6 20. Be3 Nc5 21. Qf1 Nb3 22. Rc2 Nd4 23. Rd2 Nb3 24. Rc2 Be6 25. f4 d5 26. Bb6 d4 27. Rd1 Re8 28. a4 Ra6 29. a5 Nxa5 30. Bxa5 Rxa5 31. e5 Bb3 0-1

