[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Barendregt, Johan"]
[Black "Donner, Jan"]
[Result "0-1"]
[ECO "C68"]
[EventDate "1961.01.12"]
[PlyCount "111"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O Bg4 6. h3 Bxf3 7. Qxf3 Ne7 8. Qb3 b6 9. Qc3 Qd6 10. d3 Ng6 11. Be3 c5 12. Nd2 Be7 13. g3 Bf6 14. Qb3 O-O 15. Qd5 Qxd5 16. exd5 Rfd8 17. c4 c6 18. dxc6 Rxd3 19. Ne4 Be7 20. Rfd1 Rdd8 21. b4 f5 22. bxc5 bxc5 23. Nxc5 Rdc8 24. Nb7 Rxc6 25. Na5 Rcc8 26. Rab1 Bf6 27. Bb6 e4 28. c5 Ne5 29. Rd5 g6 30. Rd6 Be7 31. Rd5 Bf6 32. Rd6 Kf7 33. Rbd1 Be7 34. R6d5 Ke6 35. Nb3 Nd3 36. Rd4 Nxc5 37. Nxc5+ Bxc5 38. Rd7 Be7 39. a4 a5 40. Rb7 h5 41. Rdd7 Bf6 42. Rh7 Rc4 43. Ba7 Rd8 44. Rb6+ Rd6 45. Rxd6+ Kxd6 46. Rh6 Rxa4 47. Rxg6 Ke6 48. Bb6 Kf7 49. Rh6 h4 50. gxh4 Be5 51. Bc7 Bxc7 52. Rh7+ Kg6 53. Rxc7 f4 54. Rc5 Ra1+ 55. Kg2 Ra2 56. h5+ 0-1

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Barendregt, Johan"]
[Black "Gereben, Erno"]
[Result "1/2-1/2"]
[ECO "B29"]
[EventDate "1961.01.12"]
[PlyCount "62"]

1. e4 c5 2. Nf3 Nf6 3. e5 Nd5 4. Nc3 Nxc3 5. dxc3 d5 6. exd6 Qxd6 7. Qxd6 exd6 8. Bf4 Bg4 9. O-O-O Nc6 10. Bxd6 O-O-O 11. Bf4 Rxd1+ 12. Kxd1 f6 13. Kc1 g5 14. Be3 Bd7 15. Nd2 Be7 16. h4 g4 17. Ne4 b6 18. Ba6+ Kc7 19. Bf4+ Ne5 20. Re1 Re8 21. Rd1 Bc6 22. f3 gxf3 23. gxf3 Bxe4 24. fxe4 Bd6 25. Rg1 Ng6 26. Bxd6+ Kxd6 27. Rg4 Re5 28. Be2 Re7 29. h5 Ne5 30. Rg8 Nf7 31. Kd2 Ng5 1/2-1/2

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Barendregt, Johan"]
[Black "Olafsson, Fridrik"]
[Result "0-1"]
[ECO "B52"]
[EventDate "1961.01.12"]
[PlyCount "110"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. O-O Nc6 6. Re1 Nf6 7. c3 e6 8. d4 cxd4 9. cxd4 d5 10. e5 Ne4 11. Nbd2 Nxd2 12. Bxd2 Be7 13. Bg5 O-O 14. Re3 Rfc8 15. Bxe7 Nxe7 16. Rc1 Rxc1 17. Qxc1 Rc8 18. Rc3 Rxc3 19. Qxc3 Qa4 20. h3 Nc6 21. a3 a5 22. Qd3 h6 23. Kf1 b5 24. Ke2 b4 25. Kd2 g6 26. Qc2 Qb5 27. Qc5 Qa6 28. a4 Nb8 29. Ke3 Nd7 30. Qe7 Nf8 31. Nd2 g5 32. Qc5 Ng6 33. g3 Kg7 34. f4 gxf4+ 35. gxf4 Nh4 36. Qb5 Qa7 37. Nb3 Nf5+ 38. Kd3 Qe7 39. Qxa5 Qh4 40. Qxb4 Qxh3+ 41. Kc2 Qf1 42. Qc3 h5 43. Qd3 Qg2+ 44. Qd2 Qg1 45. a5 h4 46. a6 h3 47. a7 h2 48. a8=Q h1=Q 49. Qd8 Qf1 50. Na5 Qhh3 51. Qf6+ Kg8 52. Qc3 Qe2+ 53. Kb1 Qd1+ 54. Ka2 Qa4+ 55. Kb1 Qf1+ 0-1

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Barendregt, Johan"]
[Black "Van den Berg, Carel"]
[Result "1/2-1/2"]
[ECO "B40"]
[EventDate "1961.01.12"]
[PlyCount "77"]

1. e4 c5 2. Nf3 e6 3. b4 cxb4 4. d4 Nf6 5. Bd3 d5 6. e5 Nfd7 7. Ng5 Be7 8. h4 Nc6 9. Be3 Nf8 10. Qg4 Bxg5 11. hxg5 Ne7 12. a3 Qb6 13. axb4 Qxb4+ 14. Ke2 Nf5 15. Na3 Bd7 16. Rhb1 Qc3 17. Nb5 Bxb5 18. Bxb5+ Nd7 19. Bxd7+ Kxd7 20. Rxb7+ Kc6 21. Rab1 Qxc2+ 22. Kf1 Rac8 23. Qf3 Qd3+ 24. Kg1 Rhf8 25. R7b3 Qa6 26. Qd1 Rc7 27. Ra1 Qc8 28. Rc3+ Kb7 29. Qa4 Rxc3 30. Qxa7+ Kc6 31. Ra6+ Qxa6 32. Qxa6+ Kd7 33. Qb5+ Rc6 34. Qb7+ Rc7 35. Qb5+ Rc6 36. g4 Nxe3 37. fxe3 Rfc8 38. Qb4 Ke8 39. Kf2 1/2-1/2

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Donner, Jan"]
[Black "Grunfeld, Ernst"]
[Result "0-1"]
[ECO "E30"]
[EventDate "1961.01.12"]
[PlyCount "66"]

1. c4 Nf6 2. d4 e6 3. Nc3 Bb4 4. Bg5 h6 5. Bh4 Bxc3+ 6. bxc3 Qe7 7. f3 d6 8. e4 e5 9. Bf2 Nc6 10. Ne2 b6 11. Ng3 O-O 12. Bd3 Na5 13. O-O c5 14. dxc5 dxc5 15. Nf5 Bxf5 16. exf5 Rad8 17. Qe2 Rd6 18. Be3 Rfd8 19. Bc2 Qb7 20. f4 Re8 21. fxe5 Rxe5 22. Qf3 Qxf3 23. Rxf3 Re8 24. Bf4 Rdd8 25. Bd3 Nc6 26. Bf1 Re4 27. g3 Ne5 28. Re3 Rxe3 29. Bxe3 Nf3+ 30. Kg2 Nxh2 31. Bf4 Nxf1 32. Rxf1 Re8 33. Kf3 Re4 0-1

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Donner, Jan"]
[Black "Ivkov, Borislav"]
[Result "0-1"]
[ECO "E60"]
[EventDate "1961.01.12"]
[PlyCount "78"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nf3 d6 6. O-O Nbd7 7. Qc2 e5 8. Rd1 Re8 9. h3 c6 10. e4 exd4 11. Nxd4 Nc5 12. Nc3 Qe7 13. f3 a5 14. Nb3 Nfd7 15. Be3 f5 16. Bf4 Ne5 17. Nxc5 dxc5 18. exf5 Bxf5 19. Ne4 Nxf3+ 20. Bxf3 Bxe4 21. Bxe4 Qxe4 22. Rd2 b5 23. Rc1 Bd4+ 24. Kh2 Qf3 25. Rg2 a4 26. Rd1 Re6 27. Rd3 Qf1 28. Rd1 Qxc4 29. Qxc4 bxc4 30. Rc1 a3 31. bxa3 c3 32. Rcc2 Rxa3 33. Rge2 Kf7 34. Kg2 Ra4 35. Kf3 Rb4 36. Bc1 Rb1 37. Rxe6 Kxe6 38. Ba3 Kd5 39. Rc1 Rb8 0-1

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Donner, Jan"]
[Black "Larsen, Bent"]
[Result "0-1"]
[ECO "E73"]
[EventDate "1961.01.12"]
[PlyCount "80"]

1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 g6 6. Be2 Bg7 7. Be3 h5 8. Nf3 Nbd7 9. h3 Bh6 10. Ng5 Nf8 11. Qd2 Ng8 12. f4 f6 13. Nf3 exf4 14. Bxf4 Bd7 15. h4 Bxf4 16. Qxf4 Qe7 17. O-O-O Nh6 18. Rdf1 O-O-O 19. Nd2 f5 20. Nf3 Ng4 21. Bd3 Re8 22. exf5 gxf5 23. Re1 Ng6 24. Qd2 Qf6 25. g3 N6e5 26. Nxe5 Nxe5 27. Ref1 Reg8 28. Ne2 Rg4 29. Rf4 Rhg8 30. Rhf1 Rxf4 31. Rxf4 a6 32. Qc2 Qh6 33. Bxf5 Rxg3 34. Bxd7+ Nxd7 35. Qe4 Rg6 36. Qe8+ Kc7 37. Kd1 Rg1+ 38. Kc2 Rg2 39. Re4 Qh7 40. Kb3 Rxe2 0-1

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Donner, Jan"]
[Black "Olafsson, Fridrik"]
[Result "0-1"]
[ECO "E94"]
[EventDate "1961.01.12"]
[PlyCount "84"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O c6 8. d5 cxd5 9. cxd5 Nbd7 10. Bg5 h6 11. Bh4 g5 12. Bg3 Nh5 13. Nd2 Nf4 14. Bg4 Nc5 15. Bxc8 Rxc8 16. Nb3 Ncd3 17. Bxf4 Nxb2 18. Bxg5 Nxd1 19. Bxd8 Nxc3 20. Be7 Rfe8 21. Bxd6 Nxe4 22. Bb4 Red8 23. Rfd1 b6 24. f3 Nd6 25. Rac1 Rxc1 26. Nxc1 Nf5 27. Ne2 a5 28. Be1 Nd4 29. Nc3 b5 30. a3 b4 31. axb4 axb4 32. Ne4 Rxd5 33. Kf1 f5 34. Nf2 Rb5 35. Rb1 b3 36. Bc3 Nc2 37. Ke2 Na3 38. Rb2 Nc4 39. Rb1 e4 40. Bxg7 Kxg7 41. g4 b2 42. Nd1 exf3+ 0-1

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Donner, Jan"]
[Black "Van Scheltinga, Theodore"]
[Result "1/2-1/2"]
[ECO "B42"]
[EventDate "1961.01.12"]
[PlyCount "83"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nc6 6. Nxc6 dxc6 7. Nd2 Qc7 8. Nc4 b5 9. Ne3 Ne7 10. O-O Ng6 11. g3 Ne5 12. Be2 Bb7 13. f4 Rd8 14. Qe1 Nd7 15. Bf3 c5 16. c4 b4 17. b3 Be7 18. Bb2 O-O 19. Qe2 Nb8 20. Rfd1 Nc6 21. Ng4 Rxd1+ 22. Rxd1 Rd8 23. e5 Qa5 24. Rxd8+ Nxd8 25. Bxb7 Nxb7 26. Bc1 Nd8 27. Be3 Nc6 28. Nf2 Nd8 29. Qd3 Qc7 30. Ne4 Nb7 31. h4 Kf8 32. h5 Ke8 33. Nf2 g6 34. Qe4 Kd7 35. g4 Qc6 36. Qd3+ Kc7 37. Ne4 Qd7 38. Qe2 Qc6 39. Bf2 a5 40. Kh2 Qd7 41. Kh3 Qd8 42. Qd2 1/2-1/2

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Gereben, Erno"]
[Black "Donner, Jan"]
[Result "1-0"]
[ECO "A48"]
[EventDate "1961.01.12"]
[PlyCount "83"]

1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. e3 d6 5. Bc4 d5 6. Bb3 c5 7. c3 cxd4 8. exd4 Nc6 9. Nbd2 O-O 10. O-O Bf5 11. Re1 Na5 12. Qe2 Nxb3 13. axb3 h6 14. Bh4 g5 15. Bg3 e6 16. Ne5 a6 17. Nd3 Nh5 18. Be5 Bxd3 19. Qxd3 f6 20. Bg3 Nxg3 21. hxg3 Qd7 22. b4 e5 23. Ra5 e4 24. Qe2 f5 25. Qh5 Rad8 26. f3 Rfe8 27. Nf1 f4 28. gxf4 gxf4 29. fxe4 Rxe4 30. Rxd5 Rxe1 31. Rxd7 Rxd7 32. Kf2 Rde7 33. Nd2 Kh8 34. Nc4 b5 35. Ne5 Bxe5 36. Kxe1 Bxd4+ 37. Kf1 Bg7 38. Qg6 Kg8 39. Qxa6 Re5 40. Qd6 Kf7 41. Kf2 Bf6 42. Kf3 1-0

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Gereben, Erno"]
[Black "Grunfeld, Ernst"]
[Result "1/2-1/2"]
[ECO "C95"]
[EventDate "1961.01.12"]
[PlyCount "82"]

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. a4 c5 16. d5 c4 17. Bg5 Qc7 18. Qd2 Bg7 19. Bh6 Kh8 20. Bxg7+ Kxg7 21. Kh2 h6 22. Nh4 Ng8 23. f4 Kh7 24. Rf1 Nc5 25. fxe5 Rxe5 26. axb5 axb5 27. Rxa8 Bxa8 28. Nf3 Re7 29. e5 Qb6 30. e6 Qb7 31. Qf4 fxe6 32. Nh4 Nd3 33. Bxd3 cxd3 34. Qg4 Rg7 35. dxe6 Qd5 36. Rf7 Qg5 37. Qd4 Qe5 38. Rxg7+ Qxg7 39. Qxd3 Qf6 40. Qd4 Qxd4 41. cxd4 Bd5 1/2-1/2

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Gereben, Erno"]
[Black "Ivkov, Borislav"]
[Result "0-1"]
[ECO "A07"]
[EventDate "1961.01.12"]
[PlyCount "122"]

1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. d3 Bg4 5. h3 Bxf3 6. Bxf3 e5 7. Nd2 Bc5 8. O-O O-O 9. c4 Qe7 10. Qc2 Nbd7 11. a3 a5 12. Rb1 Rfe8 13. e3 a4 14. Bg2 d4 15. e4 Bd6 16. Nf3 Nc5 17. Nh4 g6 18. Bg5 Ne6 19. Bd2 Nd7 20. Nf3 b5 21. Nh2 Nec5 22. f4 bxc4 23. Qxc4 Qe6 24. Qxe6 Rxe6 25. f5 Ree8 26. Bb4 Bf8 27. Rbd1 Rab8 28. Rf2 Na6 29. Bxf8 Rxf8 30. Rc2 Nac5 31. Bf1 Rb5 32. Nf3 Rfb8 33. fxg6 hxg6 34. Rdd2 Kf8 35. h4 Ke7 36. Bh3 f6 37. Bxd7 Kxd7 38. Ne1 Kd6 39. Rf2 Rf8 40. Kg2 f5 41. h5 gxh5 42. exf5 Rb3 43. Rcd2 Kd5 44. f6 Ke6 45. Rc2 Rb5 46. Rce2 Rxf6 47. Nf3 Nb3 48. Re4 Kd6 49. Rfe2 Nc1 50. Rd2 Rxf3 51. Kxf3 Rb3 52. Rh4 Nxd3 53. Ke2 Nxb2 54. Rxh5 Rxg3 55. Kf1 Nc4 56. Rf2 Rxa3 57. Rf7 d3 58. Rf6+ Kd5 59. Rf8 Ra1+ 60. Kf2 d2 61. Rd8+ Kc5 0-1

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Gereben, Erno"]
[Black "Larsen, Bent"]
[Result "0-1"]
[ECO "A44"]
[EventDate "1961.01.12"]
[PlyCount "72"]

1. d4 c5 2. d5 d6 3. e4 g6 4. c4 Bg7 5. Bd3 e5 6. Nc3 Nd7 7. Nge2 Ne7 8. Nb5 Nf6 9. f4 Nh5 10. O-O a6 11. Nbc3 exf4 12. Nxf4 Nf6 13. Be2 O-O 14. a4 Nd7 15. Nd3 Bd4+ 16. Kh1 Kg7 17. Bf4 Ne5 18. Qc1 Ng8 19. a5 Nxc4 20. Nxc5 Nxa5 21. b4 b6 22. bxa5 bxc5 23. Ra3 Qe7 24. Na4 Qxe4 25. Bf3 Qe7 26. Nb6 Rb8 27. Nc4 Rd8 28. Re1 Qc7 29. g4 Nf6 30. Bh6+ Kg8 31. h3 Bb7 32. Nb6 Re8 33. Ra2 Rxe1+ 34. Qxe1 Re8 35. Qh4 Nd7 36. Bg2 Nxb6 0-1

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Gereben, Erno"]
[Black "Olafsson, Fridrik"]
[Result "1-0"]
[ECO "E70"]
[EventDate "1961.01.12"]
[PlyCount "85"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Bg5 h6 6. Bh4 O-O 7. f4 c5 8. d5 Qa5 9. Qd2 a6 10. Nf3 b5 11. Bd3 bxc4 12. Bc2 Nbd7 13. O-O Rb8 14. Rab1 Qc7 15. Rfe1 e6 16. dxe6 fxe6 17. e5 dxe5 18. fxe5 Ng4 19. Bxg6 Rxf3 20. gxf3 Ndxe5 21. Be4 Bb7 22. Rf1 Bxe4 23. Nxe4 c3 24. Nxc3 Nc4 25. Qe2 Nge3 26. Rfc1 Qf7 27. Kh1 Nf5 28. Bf2 Nd4 29. Bxd4 cxd4 30. Ne4 Ne5 31. Rf1 a5 32. f4 Ng6 33. Qg4 Rf8 34. Nd6 Qe7 35. Qxg6 Qxd6 36. Rbe1 Qd5+ 37. Qe4 Qxa2 38. f5 exf5 39. Rxf5 Qxb2 40. Rxf8+ Bxf8 41. Rg1+ Kf7 42. Qg6+ Ke7 43. Re1+ 1-0

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Grunfeld, Ernst"]
[Black "Barendregt, Johan"]
[Result "1/2-1/2"]
[ECO "A41"]
[EventDate "1961.01.12"]
[PlyCount "43"]

1. d4 d6 2. Nf3 g6 3. c4 Bg7 4. Nc3 Nc6 5. d5 Na5 6. Bd2 c5 7. e4 Bd7 8. Be2 a6 9. Qc2 Rb8 10. a4 Qb6 11. Ra3 Nf6 12. O-O O-O 13. h3 Qc7 14. Nh2 Nxc4 15. Bxc4 b5 16. axb5 axb5 17. Be2 b4 18. Raa1 bxc3 19. Bxc3 e6 20. Ng4 Nxg4 21. Bxg4 exd5 22. exd5 1/2-1/2

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Grunfeld, Ernst"]
[Black "Ivkov, Borislav"]
[Result "0-1"]
[ECO "E68"]
[EventDate "1961.01.12"]
[PlyCount "70"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nbd7 7. O-O e5 8. e4 c6 9. d5 cxd5 10. cxd5 Nc5 11. Ne1 a5 12. Nd3 b6 13. Nxc5 bxc5 14. f3 Bd7 15. Be3 Nh5 16. Qd2 Rb8 17. Rab1 f5 18. Bg5 Qb6 19. Kh1 f4 20. g4 Bf6 21. Bxf6 Nxf6 22. Rf2 Kf7 23. Bf1 g5 24. Rg2 Rh8 25. Kg1 h5 26. h3 hxg4 27. hxg4 Rh3 28. Rf2 Rh4 29. Rh2 Rbh8 30. Rxh4 Rxh4 31. Bg2 Bxg4 32. fxg4 Nxg4 33. Nd1 c4+ 34. Kf1 Nh2+ 35. Ke2 Qg1 0-1

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Grunfeld, Ernst"]
[Black "Uhlmann, Wolfgang"]
[Result "0-1"]
[ECO "E72"]
[EventDate "1961.01.12"]
[PlyCount "42"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. g3 O-O 6. Bg2 e5 7. d5 Nbd7 8. Nge2 a5 9. h3 Nh5 10. Be3 f5 11. Qd2 Nb6 12. Qd3 Nd7 13. Qc2 f4 14. gxf4 exf4 15. Nxf4 Nxf4 16. Bxf4 Ne5 17. Bg5 Bf6 18. Bh6 Rf7 19. f4 Nxc4 20. Qe2 Nxb2 21. e5 Bxe5 0-1

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Grunfeld, Ernst"]
[Black "Van Scheltinga, Theodore"]
[Result "1/2-1/2"]
[ECO "E64"]
[EventDate "1961.01.12"]
[PlyCount "71"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 c5 6. d5 d6 7. Nf3 Na6 8. O-O Nc7 9. Nd2 Rb8 10. a4 b6 11. h3 a6 12. Kh2 Bd7 13. e4 b5 14. Re1 Nfe8 15. axb5 axb5 16. Bf1 bxc4 17. Nxc4 Nb5 18. Nxb5 Bxb5 19. Ra2 Nc7 20. f4 Ra8 21. Rxa8 Qxa8 22. Re3 Rb8 23. Ra3 Qb7 24. Qc2 Bd7 25. Na5 Qc8 26. Rb3 Nb5 27. Be3 Nd4 28. Bxd4 Bxd4 29. Rxb8 Qxb8 30. Nc6 Bxc6 31. dxc6 Qa8 32. Bb5 Qa5 33. Qe2 h5 34. h4 e6 35. b3 Kf8 36. Ba4 1/2-1/2

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Ivkov, Borislav"]
[Black "Barendregt, Johan"]
[Result "1-0"]
[ECO "A41"]
[EventDate "1961.01.12"]
[PlyCount "85"]

1. d4 d6 2. Nf3 g6 3. g3 Bg7 4. Bg2 Nd7 5. O-O e5 6. e4 Ne7 7. c3 O-O 8. Na3 Nc6 9. Be3 Nf6 10. d5 Ne7 11. Ne1 Ng4 12. Bd2 f5 13. f3 Nf6 14. Nd3 h6 15. c4 g5 16. Nf2 f4 17. Rc1 b6 18. b4 fxg3 19. hxg3 Nh5 20. Kh2 Ng6 21. Bh3 Bxh3 22. Kxh3 Qd7+ 23. Kg2 Rf7 24. Rh1 Raf8 25. Rc3 Nf6 26. Nc2 Ne7 27. Ne3 h5 28. Qe2 Bh6 29. g4 h4 30. Nf5 Nxf5 31. gxf5 Rg7 32. Ng4 Nxg4 33. fxg4 Rh7 34. Be3 Kf7 35. c5 Kf6 36. Qa6 bxc5 37. bxc5 Rb8 38. Rb3 Rhh8 39. Rhb1 Rxb3 40. Rxb3 Ra8 41. Rb7 Bf8 42. c6 h3+ 43. Kh2 1-0

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Ivkov, Borislav"]
[Black "Uhlmann, Wolfgang"]
[Result "1-0"]
[ECO "E97"]
[EventDate "1961.01.12"]
[PlyCount "129"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. b4 Nh5 10. g3 f5 11. Ng5 Nf6 12. f3 a5 13. bxa5 Rxa5 14. a4 f4 15. Bd2 Nh5 16. g4 Bf6 17. Nh3 Bh4 18. Be1 Bxe1 19. Qxe1 Nf6 20. Nf2 h5 21. g5 Nh7 22. h4 Bd7 23. Nd3 c5 24. Nb5 Nc8 25. Rf2 Rf7 26. Bf1 Ra6 27. Rfa2 Nf8 28. Qc3 Re7 29. Kh2 Kf7 30. Rb1 Qa5 31. Qxa5 Rxa5 32. Nc3 b6 33. Nc1 Ra6 34. Nb3 Be8 35. Bh3 Bd7 36. Bf1 Be8 37. Rba1 Rb7 38. Nb5 Bd7 39. a5 bxa5 40. Nxa5 Rbb6 41. Bh3 Bxh3 42. Kxh3 Nd7 43. Nc6 Nb8 44. Nxb8 Rxa2 45. Rxa2 Rxb8 46. Ra6 Ke7 47. Rc6 Ra8 48. Rc7+ Kf8 49. Rh7 Nb6 50. Nxd6 Ra3 51. Kg2 Ra2+ 52. Kf1 Ra1+ 53. Kf2 Ra2+ 54. Ke1 Ra1+ 55. Kd2 Ra2+ 56. Kc1 Ra1+ 57. Kb2 Rf1 58. Rf7+ Kg8 59. Rb7 Rf2+ 60. Kc1 Na4 61. Nf7 Nc3 62. d6 Re2 63. Nh6+ Kf8 64. Rb8+ Kg7 65. Rb3 1-0

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Ivkov, Borislav"]
[Black "Van Scheltinga, Theodore"]
[Result "1-0"]
[ECO "D36"]
[EventDate "1961.01.12"]
[PlyCount "111"]

1. c4 Nf6 2. d4 c6 3. Nc3 d5 4. Nf3 e6 5. cxd5 exd5 6. Bg5 Be7 7. Qc2 g6 8. e3 Bf5 9. Bd3 Bxd3 10. Qxd3 O-O 11. O-O Re8 12. Bxf6 Bxf6 13. b4 a6 14. a4 Nd7 15. b5 axb5 16. axb5 Nb6 17. bxc6 bxc6 18. Ra6 Qc7 19. Rb1 Nc4 20. Rxa8 Rxa8 21. Nd2 Nxd2 22. Qxd2 Ra3 23. Qc2 Qa5 24. Rc1 Ra1 25. Nb1 Qb5 26. g3 Kg7 27. Nd2 Rxc1+ 28. Qxc1 Be7 29. Qa1 Qe2 30. Qc3 g5 31. h3 h5 32. Nf1 Qb5 33. g4 hxg4 34. hxg4 Qe2 35. Qxc6 Qxg4+ 36. Ng3 Qe6 37. Qc7 Kg6 38. Qb8 Kg7 39. Kg2 Bf6 40. Qb1 Be7 41. Kf3 g4+ 42. Kg2 Bg5 43. Qc2 Qd7 44. Qd3 Qe6 45. Qb1 Qg6 46. Qh1 Qe6 47. Qh5 f6 48. Qh1 f5 49. Qb1 Kg6 50. Qb8 Bh4 51. Ne2 Qe4+ 52. Kg1 Bg5 53. Qd6+ Kf7 54. Qd7+ Be7 55. Nf4 g3 56. Nxd5 1-0

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Ivkov, Borislav"]
[Black "Van den Berg, Carel"]
[Result "1-0"]
[ECO "E19"]
[EventDate "1961.01.12"]
[PlyCount "73"]

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 f5 10. d5 Bf6 11. Qc2 Na6 12. Rd1 Qe7 13. Ne1 Nc5 14. Rb1 Rad8 15. Be3 d6 16. Bxc5 dxc5 17. dxe6 Bxg2 18. Nxg2 Qxe6 19. e3 Be5 20. h4 Bd6 21. Rd3 Qe4 22. Rbd1 h6 23. R1d2 a6 24. Ra3 Qxc2 25. Rxc2 a5 26. Rd3 Kf7 27. h5 Kf6 28. f4 Rfe8 29. Kf2 Re4 30. Kf3 Re7 31. Rd5 Ke6 32. Rcd2 Rg8 33. Nh4 Rf7 34. g4 fxg4+ 35. Kxg4 Rgf8 36. Ng6 Re8 37. e4 1-0

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Larsen, Bent"]
[Black "Barendregt, Johan"]
[Result "1-0"]
[ECO "A02"]
[EventDate "1961.01.12"]
[PlyCount "65"]

1. f4 Nf6 2. Nf3 g6 3. b4 Bg7 4. Bb2 O-O 5. g3 d6 6. Qc1 a5 7. b5 Bd7 8. a4 c6 9. Na3 Qc8 10. Bg2 Bh3 11. O-O Bxg2 12. Kxg2 Nbd7 13. c4 Nc5 14. Qc2 Qf5 15. Qxf5 gxf5 16. Nc2 cxb5 17. axb5 d5 18. Rfb1 dxc4 19. Ne3 Rfd8 20. Nxc4 Nfe4 21. Bxg7 Kxg7 22. d4 Ne6 23. Rxa5 Rac8 24. Ne3 Kf6 25. b6 Nxd4 26. Rb4 Nxf3 27. Rxf5+ Kg6 28. Rxe4 e6 29. Ra5 Nd4 30. Rg5+ Kf6 31. Ng4+ Ke7 32. f5 Kf8 33. Nh6 1-0

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Larsen, Bent"]
[Black "Grunfeld, Ernst"]
[Result "1-0"]
[ECO "A29"]
[EventDate "1961.01.12"]
[PlyCount "109"]

1. g3 d5 2. Bg2 e5 3. Nf3 Nc6 4. O-O Nf6 5. c4 Be7 6. cxd5 Nxd5 7. Nc3 Be6 8. d4 Nxc3 9. bxc3 e4 10. Nd2 f5 11. Rb1 Na5 12. Rb5 b6 13. Re5 Qd7 14. Nxe4 fxe4 15. d5 Bf7 16. Bg5 O-O 17. Rxe7 Qxd5 18. Qxd5 Bxd5 19. Rd1 Bxa2 20. Rdd7 Rf7 21. Rxf7 Bxf7 22. Bxe4 Re8 23. f3 Bg6 24. Bd5+ Kh8 25. e4 c6 26. Ba2 h6 27. Be3 c5 28. Bd5 Rc8 29. Bf4 Nc6 30. Bxc6 Rxc6 31. Be5 Re6 32. Bxg7+ Kg8 33. Rxa7 Bf7 34. Bd4 cxd4 35. cxd4 Rd6 36. d5 Bxd5 37. exd5 Rxd5 38. Rb7 Rb5 39. Kg2 Rb2+ 40. Kh3 Kh8 41. g4 b5 42. Kg3 Kg8 43. h4 Rb4 44. g5 h5 45. f4 Rb3+ 46. Kg2 Rb1 47. Kf3 Rh1 48. Ke4 Rxh4 49. Kf5 Kf8 50. Rxb5 Kg7 51. Rb7+ Kf8 52. g6 Kg8 53. Kg5 Rg4+ 54. Kh6 Rxf4 55. Rb8+ 1-0

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Larsen, Bent"]
[Black "Ivkov, Borislav"]
[Result "1-0"]
[ECO "A36"]
[EventDate "1961.01.12"]
[PlyCount "80"]

1. c4 Nf6 2. Nc3 c5 3. g3 g6 4. Bg2 Bg7 5. a3 Nc6 6. d3 O-O 7. Rb1 a5 8. e4 d6 9. Nge2 Ne8 10. O-O Nc7 11. f4 Nd4 12. Nxd4 cxd4 13. Na4 Na6 14. b4 axb4 15. axb4 Bd7 16. b5 Nc5 17. Nxc5 dxc5 18. e5 Qb6 19. Qf3 Ra7 20. g4 e6 21. Bd2 Rfa8 22. Be1 Bc8 23. Bh4 Ra2 24. Be7 Rd2 25. Ra1 Raa2 26. Rxa2 Rxa2 27. h4 Bf8 28. Bxf8 Kxf8 29. h5 Qa5 30. Rf2 Qe1+ 31. Bf1 Rxf2 32. Qxf2 Qxf2+ 33. Kxf2 b6 34. Bg2 Kg7 35. Kg3 f6 36. exf6+ Kxf6 37. Kh4 Bd7 38. Bc6 Bc8 39. Be8 Bb7 40. Bc6 Bc8 1-0

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Larsen, Bent"]
[Black "Van den Berg, Carel"]
[Result "1/2-1/2"]
[ECO "A29"]
[EventDate "1961.01.12"]
[PlyCount "115"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bc5 5. Bg2 O-O 6. O-O d6 7. a3 a5 8. e3 Bf5 9. d4 Ba7 10. d5 Ne7 11. h3 h6 12. Kh2 Ne4 13. Nb5 Bb6 14. Ne1 c6 15. g4 Bh7 16. Bxe4 Bxe4 17. Nc3 Bh7 18. e4 Bd4 19. f3 b5 20. Nc2 Bxc3 21. bxc3 bxc4 22. Ne3 Qb6 23. a4 Rac8 24. Kg3 Rfd8 25. Re1 cxd5 26. Nxd5 Nxd5 27. Qxd5 Qc6 28. Rd1 Qb6 29. Ba3 Bg6 30. Re1 Qb3 31. Qd2 Qxa4 32. Bb4 Qc6 33. Rxa5 f6 34. Rea1 Bf7 35. Ra6 Qe8 36. Rxd6 Rxd6 37. Qxd6 Qd8 38. Qa6 Qd7 39. h4 Rd8 40. Qa2 Qd3 41. Qf2 h5 42. g5 f5 43. Re1 Bg6 44. exf5 Qxf5 45. Kg2 Rd3 46. Ba3 Bf7 47. Re3 Bd5 48. Rxd3 cxd3 49. Bc1 Qg4+ 50. Qg3 Bxf3+ 51. Kf2 Qxg3+ 52. Kxg3 Bd1 53. Kf2 Kf7 54. Ke3 Bc2 55. c4 Ke6 56. g6 d2 57. Kxd2 Bxg6 58. Ke1 1/2-1/2

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Olafsson, Fridrik"]
[Black "Grunfeld, Ernst"]
[Result "1-0"]
[ECO "D42"]
[EventDate "1961.01.12"]
[PlyCount "93"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 c5 5. cxd5 Nxd5 6. e3 Nc6 7. Bd3 cxd4 8. exd4 Be7 9. O-O O-O 10. Qe2 b6 11. Nxd5 exd5 12. Bxh7+ Kxh7 13. Qc2+ Kg8 14. Qxc6 Qd7 15. Qc2 Qf5 16. Qc7 Bf6 17. Qg3 Ba6 18. Re1 Rac8 19. Bg5 Rc2 20. Bxf6 Qxf6 21. b3 Rfc8 22. h3 Be2 23. Ne5 R8c3 24. f3 Ba6 25. Kh2 Bc8 26. b4 Be6 27. a4 Qf5 28. b5 Rd2 29. Rac1 Rxc1 30. Rxc1 Rxd4 31. Nc6 Qf4 32. Nxd4 Qxc1 33. Qe5 Qa1 34. f4 Qxa4 35. f5 Bd7 36. Qxd5 Be8 37. Qd8 Kh7 38. Qd5 Qd1 39. f6 g6 40. Qe5 Qd2 41. Nf3 Qd8 42. Nd4 Bd7 43. h4 Qe8 44. Qd5 Kg8 45. h5 Kh7 46. Nf3 Be6 47. hxg6+ 1-0

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Olafsson, Fridrik"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[ECO "C16"]
[EventDate "1961.01.12"]
[PlyCount "106"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Ne7 5. Bd2 b6 6. Nf3 Nf5 7. Nb5 Be7 8. Bd3 h5 9. Qe2 a6 10. Na3 g6 11. c3 a5 12. Nc2 Ba6 13. Bxa6 Nxa6 14. Ne3 Qd7 15. O-O c6 16. b3 Nc7 17. a4 c5 18. Rfd1 O-O 19. g3 Rfd8 20. Kg2 Qc8 21. Nxf5 exf5 22. Bg5 Bxg5 23. Nxg5 Ne6 24. Nxe6 Qxe6 25. Rab1 Rac8 26. Qe3 Rd7 27. Rd2 Rdc7 28. h4 cxd4 29. Qxd4 Rxc3 30. Qxd5 Qxd5+ 31. Rxd5 R8c5 32. Rd8+ Kg7 33. Rb8 Rxe5 34. Rxb6 Re2 35. Rb5 Rcc2 36. Rf1 Rb2 37. Rxa5 Rxb3 38. Rb5 Rxb5 39. axb5 Rb2 40. Ra1 Rxb5 41. Ra4 Re5 42. Kf3 Kf6 43. Rb4 Rd5 44. Ra4 Ke6 45. Rb4 Rc5 46. Ra4 Rc3+ 47. Kg2 Rd3 48. Rb4 f6 49. Rb6+ Rd6 50. Rb8 f4 51. gxf4 Kf5 52. Kg3 Rd1 53. f3 Rg1+ 1/2-1/2

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Olafsson, Fridrik"]
[Black "Larsen, Bent"]
[Result "0-1"]
[ECO "A81"]
[EventDate "1961.01.12"]
[PlyCount "194"]

1. Nf3 f5 2. g3 g6 3. Bg2 Bg7 4. d4 Nf6 5. O-O O-O 6. b3 b5 7. c4 bxc4 8. bxc4 c5 9. Bb2 Qb6 10. Qc1 Nc6 11. dxc5 Qxc5 12. Nbd2 Rb8 13. Nb3 Qb6 14. Ne5 Bb7 15. Nd3 Nb4 16. Bd4 Nxd3 17. Qd2 Ne4 18. Qxd3 Bxd4 19. Nxd4 Nc5 20. Qe3 Bxg2 21. Kxg2 Ne4 22. f3 Nd6 23. Qe5 Nf7 24. Qe3 Rfc8 25. Rab1 Qc5 26. Rxb8 Rxb8 27. Qc3 Nd6 28. Rc1 Qe5 29. c5 Nf7 30. Kf2 Qd5 31. Qc4 Qxc4 32. Rxc4 Ne5 33. Ra4 Rb7 34. h3 Kf7 35. f4 Nc6 36. Nxc6 dxc6 37. Ra6 Rc7 38. Ke3 Ke6 39. Kd3 Kd5 40. Ra5 Rb7 41. e3 h6 42. Ke2 e6 43. Kf3 g5 44. g4 Rf7 45. a3 Kc4 46. gxf5 exf5 47. Kf2 gxf4 48. exf4 Rg7 49. Kf3 h5 50. h4 Rb7 51. Kf2 Kd5 52. Kf3 Rb3+ 53. Kg2 Rb7 54. Kf3 Kd4 55. Ra4+ Kd3 56. Ra6 Rc7 57. Ra4 Kc3 58. Kf2 Kb3 59. Ra6 Kc4 60. Ra5 Kd5 61. Ke3 Rg7 62. Kf3 Rb7 63. Kf2 Rb2+ 64. Kf3 Rb3+ 65. Kg2 Rc3 66. Rxa7 Ke4 67. a4 Rxc5 68. a5 Kxf4 69. a6 Rc2+ 70. Kh3 Rc3+ 71. Kg2 Rg3+ 72. Kh2 Ra3 73. Kg2 Kg4 74. Rg7+ Kxh4 75. a7 f4 76. Rc7 Kg4 77. Rg7+ Kf5 78. Rc7 Ke4 79. Rxc6 Ra2+ 80. Kh3 Rxa7 81. Rc4+ Ke3 82. Rc3+ Kd4 83. Rb3 Re7 84. Kg2 Re2+ 85. Kf1 Ra2 86. Rh3 Ra5 87. Rb3 Ke4 88. Rb2 Kf3 89. Rf2+ Kg4 90. Rg2+ Kf5 91. Rb2 h4 92. Kf2 Kg4 93. Kg2 Rd5 94. Ra2 Rd4 95. Rb2 h3+ 96. Kh2 f3 97. Kg1 Re4 0-1

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Olafsson, Fridrik"]
[Black "Uhlmann, Wolfgang"]
[Result "1/2-1/2"]
[ECO "D93"]
[EventDate "1961.01.12"]
[PlyCount "33"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Qb3 c6 7. Nf3 Qa5 8. a3 Nbd7 9. Rc1 dxc4 10. Bxc4 Nb6 11. Bd3 Be6 12. Qc2 Nfd5 13. Be5 Bxe5 14. Nxe5 c5 15. dxc5 Qxc5 16. Nb5 Qxc2 17. Rxc2 1/2-1/2

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Olafsson, Fridrik"]
[Black "Van Scheltinga, Theodore"]
[Result "1/2-1/2"]
[ECO "D27"]
[EventDate "1961.01.12"]
[PlyCount "67"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 a6 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 c5 9. O-O Bb7 10. dxc5 Bxc5 11. Qe2 Nbd7 12. a3 Qb8 13. h3 O-O 14. b4 Be7 15. Bb2 Bxf3 16. gxf3 Ne5 17. Ne4 Nxd3 18. Qxd3 Rd8 19. Qc3 Qb7 20. Rfd1 Rd5 21. Rac1 Rad8 22. Rxd5 Qxd5 23. Qc6 Nxe4 24. Qxd5 exd5 25. fxe4 dxe4 26. Rc7 Bh4 27. Bd4 h6 28. Rc6 Rd5 29. Rxa6 Rg5+ 30. Kf1 Rf5 31. Ra5 Rxf2+ 32. Kg1 Ra2 33. Rxb5 Rxa3 34. Re5 1/2-1/2

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Uhlmann, Wolfgang"]
[Black "Barendregt, Johan"]
[Result "1-0"]
[ECO "A44"]
[EventDate "1961.01.12"]
[PlyCount "41"]

1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. e4 c5 5. d5 e5 6. Be2 Nh6 7. h4 f6 8. Be3 Nf7 9. Nh3 Na6 10. a3 Bd7 11. Rb1 f5 12. exf5 Bxf5 13. Ng5 Bxb1 14. Ne6 Qf6 15. Qxb1 Bh6 16. Ne4 Qe7 17. Bg5 Bxg5 18. hxg5 Nd8 19. Nf6+ Kf7 20. Qe4 Nc7 21. Bd3 1-0

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Uhlmann, Wolfgang"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "E66"]
[EventDate "1961.01.12"]
[PlyCount "87"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nc6 7. d5 Na5 8. Nd2 c5 9. O-O a6 10. Qc2 Rb8 11. b3 b5 12. Bb2 bxc4 13. bxc4 Bh6 14. f4 e5 15. Rab1 exf4 16. gxf4 Nh5 17. Nce4 Rxb2 18. Qxb2 f5 19. Qb6 fxe4 20. e3 Nf6 21. Qxd8 Rxd8 22. Rb8 Re8 23. Rc1 g5 24. fxg5 Bxg5 25. Rc3 Rf8 26. Nxe4 Nxe4 27. Bxe4 Kg7 28. Bg2 Bf6 29. Rc1 Kf7 30. Be4 Rg8+ 31. Bg2 Ke7 32. Kh1 Rf8 33. Ra8 Bb7 34. Rxf8 Kxf8 35. Be4 h5 36. Kg2 Ke7 37. Bf5 Kd8 38. Kf3 Bc8 39. Ke4 h4 40. h3 Be5 41. Bxc8 Kxc8 42. Kd3 Nb7 43. Rf1 Nd8 44. Ke4 1/2-1/2

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Uhlmann, Wolfgang"]
[Black "Gereben, Erno"]
[Result "1-0"]
[ECO "A54"]
[EventDate "1961.01.12"]
[PlyCount "75"]

1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3 Nc6 5. g3 Be7 6. Bg2 O-O 7. O-O Ng4 8. d5 Nb8 9. h3 Nf6 10. Ne1 a5 11. Nd3 Na6 12. e4 Nd7 13. Be3 b6 14. a3 Ndc5 15. f4 Nxd3 16. Qxd3 Bd7 17. Qc2 Bf6 18. Rab1 Nc5 19. b4 axb4 20. axb4 exf4 21. gxf4 Na4 22. Ne2 Re8 23. Nd4 g6 24. Rb3 Bg7 25. Ra3 Qh4 26. Qd2 b5 27. Nxb5 Bxb5 28. cxb5 Nb6 29. Rxa8 Rxa8 30. Bf2 Qe7 31. e5 Ra4 32. Re1 h5 33. exd6 Qxd6 34. Bc5 Qd8 35. Qe3 Kh7 36. Qe7 Qb8 37. Qxf7 Kh6 38. Be4 1-0

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Uhlmann, Wolfgang"]
[Black "Larsen, Bent"]
[Result "0-1"]
[ECO "A62"]
[EventDate "1961.01.12"]
[PlyCount "80"]

1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Bg2 g6 7. Nf3 Bg7 8. Nc3 O-O 9. Nd2 Nbd7 10. O-O Re8 11. a4 Ne5 12. h3 g5 13. Nde4 Nxe4 14. Nxe4 h6 15. f4 gxf4 16. gxf4 Ng6 17. f5 Nh4 18. f6 Nxg2 19. Qd3 Nh4 20. Qg3 Ng6 21. Nxd6 Re5 22. Nxf7 Kxf7 23. fxg7+ Kxg7 24. b4 Qxd5 25. Bb2 Be6 26. e4 Qd6 27. Rad1 Qc7 28. Rf5 Kh7 29. Bxe5 Qe7 30. Bf6 Qf7 31. Rf2 cxb4 32. Bb2 Qe7 33. Rc1 Rg8 34. Kh2 Nf8 35. Qf4 Nd7 36. Rc7 Qe8 37. e5 Qg6 38. Rc1 Nc5 39. Bd4 b6 40. Qe3 Nb3 0-1

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Uhlmann, Wolfgang"]
[Black "Van den Berg, Carel"]
[Result "1/2-1/2"]
[ECO "E05"]
[EventDate "1961.01.12"]
[PlyCount "48"]

1. d4 Nf6 2. c4 e6 3. g3 d5 4. Nf3 dxc4 5. Qa4+ Nbd7 6. Bg2 a6 7. Qxc4 b5 8. Qc2 Bb7 9. O-O Be7 10. Bg5 O-O 11. a4 c5 12. Bxf6 Nxf6 13. dxc5 Be4 14. Qc1 Rc8 15. b4 Nd5 16. Nbd2 Bxf3 17. Bxf3 Nxb4 18. Nb3 Bxc5 19. Nxc5 Qe7 20. Qb2 Qxc5 21. Rfc1 Qe7 22. axb5 axb5 23. Rxc8 Rxc8 24. Ra5 Qc5 1/2-1/2

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Van Scheltinga, Theodore"]
[Black "Barendregt, Johan"]
[Result "1/2-1/2"]
[ECO "C41"]
[EventDate "1961.01.12"]
[PlyCount "61"]

1. d4 d6 2. e4 Nf6 3. Nc3 e5 4. Nf3 Nbd7 5. h3 Be7 6. Be3 c6 7. g3 Qa5 8. Nd2 b5 9. Bg2 O-O 10. O-O b4 11. Ne2 d5 12. dxe5 Nxe4 13. Nb3 Qc7 14. f3 Nec5 15. f4 Ne4 16. Kh2 f5 17. exf6 Ndxf6 18. c3 a5 19. Rc1 Bg4 20. Bxe4 dxe4 21. Qe1 a4 22. Nbd4 c5 23. Nc2 b3 24. Na3 Qd7 25. Ng1 Qd3 26. c4 bxa2 27. Rc3 Qb1 28. Nxb1 a1=Q 29. Qc1 a3 30. Nxa3 Qxc1 31. Bxc1 1/2-1/2

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Van Scheltinga, Theodore"]
[Black "Gereben, Erno"]
[Result "0-1"]
[ECO "E65"]
[EventDate "1961.01.12"]
[PlyCount "80"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 c5 5. Nf3 O-O 6. O-O Na6 7. Nc3 d6 8. h3 Qb6 9. b3 Bf5 10. Bb2 Rad8 11. g4 Be6 12. e4 h5 13. g5 Ne8 14. d5 Bd7 15. Qe2 Qa5 16. e5 Bf5 17. Ne4 Bxe4 18. Qxe4 dxe5 19. Bxe5 Nd6 20. Qe2 Nf5 21. h4 Rfe8 22. Bh3 e6 23. dxe6 Rxe6 24. Bxf5 gxf5 25. Qe1 Nb4 26. a3 Bxe5 27. Nxe5 Qc7 28. f4 Nd3 29. Qc3 Nxe5 30. fxe5 Rxe5 31. Rad1 Rde8 32. Rd3 Re2 33. Rg3 f4 34. g6 f6 35. Rg2 Rxg2+ 36. Kxg2 Qe5 37. Qf3 Qf5 38. Qxf4 Re2+ 39. Kg1 Qxg6+ 40. Kh1 Qg2# 0-1

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Van Scheltinga, Theodore"]
[Black "Larsen, Bent"]
[Result "1-0"]
[ECO "A52"]
[EventDate "1961.01.12"]
[PlyCount "119"]

1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Nf3 Nc6 5. Bf4 f6 6. exf6 Qxf6 7. Qd2 Bb4 8. Nc3 Bxc3 9. bxc3 d6 10. e3 Be6 11. Nd4 Bd7 12. Be2 Nge5 13. O-O O-O 14. Bg3 Na5 15. Bxe5 dxe5 16. Nb3 Nxb3 17. axb3 Bc6 18. f3 Qg5 19. Qc1 Rad8 20. Ra2 Rd6 21. e4 Qh4 22. g3 Rg6 23. Rf2 Bxe4 24. Rg2 Qf6 25. fxe4 Qb6+ 26. Kh1 Rgf6 27. b4 h5 28. Qg1 Qd6 29. Qe3 h4 30. gxh4 Rf4 31. Rd2 Qh6 32. Qg1 R8f7 33. h5 Rxe4 34. Rd8+ Rf8 35. Rd7 Rxe2 36. Rdxg7+ Kh8 37. Rxe2 Qxg7 38. Qxg7+ Kxg7 39. Rxe5 Rf3 40. Re7+ Kh6 41. Rxc7 Rxc3 42. c5 Kxh5 43. Rxb7 a5 44. bxa5 Rxc5 45. a6 Ra5 46. a7 Kg4 47. Kg2 Ra2+ 48. Kf1 Kf3 49. Rf7+ Ke4 50. Ke1 Kd5 51. Kd1 Ke6 52. Rb7 Kf6 53. Kc1 Kf5 54. Kb1 Ra5 55. Kb2 Ke5 56. h4 Kf6 57. Kb3 Kg6 58. Kb4 Ra1 59. Kb5 Kh5 60. Kb6 1-0

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Van Scheltinga, Theodore"]
[Black "Uhlmann, Wolfgang"]
[Result "0-1"]
[ECO "E62"]
[EventDate "1961.01.12"]
[PlyCount "78"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nc6 7. d5 Na5 8. Nd2 c6 9. O-O cxd5 10. cxd5 Bd7 11. Nb3 Rc8 12. Nxa5 Qxa5 13. Qb3 Rc7 14. a4 Rfc8 15. Bd2 Ng4 16. h3 Ne5 17. Rfd1 Nc4 18. Be1 Nxb2 19. Nb5 Qb6 20. Rdb1 a6 21. Ba5 Qxa5 22. Nxc7 Nxa4 23. Na8 Rxa8 24. Qxb7 Qd8 25. Ra3 Bb5 26. Re3 Bf6 27. Rc1 Rb8 28. Qc7 Nc5 29. Qxd8+ Rxd8 30. Rb1 Ra8 31. Bf3 Bd7 32. Kh2 a5 33. Ra3 Bf5 34. Rb5 a4 35. e3 Bc2 36. Ra2 Bb3 37. Rd2 a3 38. Rxc5 dxc5 39. d6 Rd8 0-1

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Van Scheltinga, Theodore"]
[Black "Van den Berg, Carel"]
[Result "1/2-1/2"]
[ECO "A15"]
[EventDate "1961.01.12"]
[PlyCount "52"]

1. Nf3 Nf6 2. c4 g6 3. b3 Bg7 4. Bb2 O-O 5. g3 d6 6. Bg2 e5 7. O-O Re8 8. Nc3 Nbd7 9. e4 Nc5 10. Qc2 Bg4 11. h3 Bxf3 12. Bxf3 Ne6 13. Ne2 c5 14. d3 h5 15. Bg2 h4 16. f4 Nd4 17. Nxd4 cxd4 18. g4 Nh7 19. Qf2 Rf8 20. Kh1 Qf6 21. Bc1 exf4 22. Bxf4 g5 23. Bd2 Qxf2 24. Rxf2 Be5 25. a4 Rfc8 26. a5 f6 1/2-1/2

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Van den Berg, Carel"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "C87"]
[EventDate "1961.01.12"]
[PlyCount "32"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. d4 Nf6 7. O-O Be7 8. Re1 O-O 9. Nbd2 exd4 10. cxd4 Nb4 11. Bxd7 Qxd7 12. Nf1 c5 13. Ne3 cxd4 14. Nxd4 Rfe8 15. Ndf5 Bf8 16. f3 d5 1/2-1/2

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Van den Berg, Carel"]
[Black "Gereben, Erno"]
[Result "1-0"]
[ECO "B15"]
[EventDate "1961.01.12"]
[PlyCount "81"]

1. e4 c6 2. d4 d5 3. Nc3 g6 4. Nf3 Bg7 5. Be2 Bg4 6. Be3 e6 7. O-O Ne7 8. Qd2 O-O 9. Bg5 Nd7 10. Rad1 Re8 11. h3 Bxf3 12. Bxf3 Nb6 13. b3 Qd7 14. a4 Rad8 15. Rfe1 f6 16. Bh4 g5 17. Bg3 dxe4 18. Bh5 Ng6 19. Nxe4 Nc8 20. Qb4 b6 21. Qc4 Re7 22. b4 Qd5 23. Qd3 Nf4 24. Bxf4 gxf4 25. Bf3 Qf5 26. Qc4 Qg6 27. Qxc6 f5 28. Nc3 Qe8 29. Qxe8+ Rexe8 30. Ne2 Nd6 31. Nxf4 e5 32. dxe5 Bxe5 33. Bd5+ Kh8 34. Ne6 Bc3 35. Re3 Rc8 36. b5 Ne4 37. Bxe4 fxe4 38. Ng5 Rc4 39. Rd7 h6 40. Nf7+ Kg8 41. Nd6 1-0

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Van den Berg, Carel"]
[Black "Grunfeld, Ernst"]
[Result "1/2-1/2"]
[ECO "C94"]
[EventDate "1961.01.12"]
[PlyCount "67"]

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. d3 Bb7 11. Nbd2 Nbd7 12. Nf1 Nc5 13. Bc2 Re8 14. Ng3 Bf8 15. Nh2 d5 16. Qf3 Ne6 17. Nf5 dxe4 18. dxe4 c5 19. Qg3 Kh8 20. Nf3 Nd7 21. h4 f6 22. h5 Qc7 23. Qh4 c4 24. Be3 Ndc5 25. Bxc5 Bxc5 26. h6 g5 27. Qg4 Rad8 28. Ne3 Nf4 29. Qf5 Qe7 30. Nd5 Nxd5 31. exd5 Rxd5 32. Rad1 Rxd1 33. Rxd1 Bc8 34. Qe4 1/2-1/2

[Event "23rd Hoogovens it"]
[Site "Beverwijk NED"]
[Date "1961.01.??"]
[Round "?"]
[White "Van den Berg, Carel"]
[Black "Olafsson, Fridrik"]
[Result "1/2-1/2"]
[ECO "B97"]
[EventDate "1961.01.12"]
[PlyCount "80"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6 8. Nb3 h6 9. Bxf6 gxf6 10. f5 h5 11. Be2 Qe3 12. Qd3 Qxd3 13. cxd3 Nd7 14. O-O Ke7 15. d4 Nb6 16. Rad1 Bd7 17. Na5 Rb8 18. Rd3 h4 19. Bg4 Be8 20. Rdf3 Bg7 21. e5 dxe5 22. dxe5 Nd7 23. exf6+ Nxf6 24. Bh3 b6 25. Nb3 Bc6 26. Rf4 Bh6 27. Rc4 Be3+ 28. Kh1 Rbc8 29. Re1 Bg5 30. Rb4 Nd5 31. Nxd5+ Bxd5 32. fxe6 fxe6 33. Rxb6 Rb8 34. Rxa6 Ra8 35. Rxa8 Rxa8 36. Bxe6 Bxe6 37. Nc5 Rxa2 38. Rxe6+ Kf7 39. Re1 Rxb2 40. Ne4 Kg6 1/2-1/2
