| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. V Brat vs F Ekstrom |
| 0-1 | 59 | 1964 | corr | B16 Caro-Kann, Bronstein-Larsen Variation |
| 52. J Krzyszton vs F Ekstrom |
| ½-½ | 28 | 1966 | corr | B03 Alekhine's Defense |
| 53. Larsson vs F Ekstrom |
| 1-0 | 24 | 1967 | corr | D48 Queen's Gambit Declined Semi-Slav, Meran |
| 54. A Schmaus vs F Ekstrom |
| 1-0 | 41 | 1967 | cr GER-SWE | D44 Queen's Gambit Declined Semi-Slav |
| 55. F Ekstrom vs Shmaus |
| 1-0 | 40 | 1968 | cr | B86 Sicilian, Fischer-Sozin Attack |
| 56. KF Kasowitz vs F Ekstrom |
| 0-1 | 23 | 1968 | cr | D48 Queen's Gambit Declined Semi-Slav, Meran |
| 57. Ekebjaerg vs F Ekstrom |
| 0-1 | 34 | 1969 | cr EU M | B25 Sicilian, Closed |
| 58. A Bryntse vs F Ekstrom |
| 0-1 | 22 | 1971 | SWE-ch31 corr | A02 Bird's Opening |
| 59. F Ekstrom vs E Sokolov |
| 1-0 | 50 | 1971 | cr ch EU | B03 Alekhine's Defense |
| 60. F Ekstrom vs B Lindh |
| 1-0 | 29 | 1971 | cr ch | B10 Caro-Kann |
| 61. F Ekstrom vs O Edelsvard |
| 1-0 | 55 | 1971 | cr ch | B08 Pirc, Classical |
| 62. Gor Andersson vs F Ekstrom |
| ½-½ | 46 | 1971 | cr ch | B87 Sicilian, Fischer-Sozin with ...a6 and ...b5 |
| 63. E Nordstrom vs F Ekstrom |
| ½-½ | 63 | 1971 | cr K | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 64. M Johansson vs F Ekstrom |
| 0-1 | 33 | 1971 | cr K | C73 Ruy Lopez, Modern Steinitz Defense |
| 65. F Ekstrom vs G Osterling |
| 1-0 | 49 | 1971 | cr K | C64 Ruy Lopez, Classical |
| 66. F Ekstrom vs T Hultquist |
| ½-½ | 21 | 1971 | cr K | C83 Ruy Lopez, Open |
| 67. A Bergdahl vs F Ekstrom |
| ½-½ | 24 | 1971 | cr K | C46 Three Knights |
| 68. Y Neishtadt vs F Ekstrom |
| 1-0 | 50 | 1971 | cr | D46 Queen's Gambit Declined Semi-Slav |
| 69. F Ekstrom vs M Yudovich Sr |
| ½-½ | 41 | 1972 | 7th Correspondence World Championship | C93 Ruy Lopez, Closed, Smyslov Defense |
| 70. F Ekstrom vs K B Richardson |
| 0-1 | 40 | 1972 | 7th Correspondence World Championship | B08 Pirc, Classical |
| 71. F Ekstrom vs F Brglez |
| 1-0 | 33 | 1972 | 7th Correspondence World Championship | C65 Ruy Lopez, Berlin Defense |
| 72. F Ekstrom vs J M Boey |
| ½-½ | 15 | 1972 | 7th Correspondence World Championship | C63 Ruy Lopez, Schliemann Defense |
| 73. P Dubinin vs F Ekstrom |
| 0-1 | 31 | 1972 | 7th Correspondence World Championship | D47 Queen's Gambit Declined Semi-Slav |
| 74. H Cording vs F Ekstrom |
| 1-0 | 61 | 1972 | 7th Correspondence World Championship | D43 Queen's Gambit Declined Semi-Slav |
| 75. F Ekstrom vs Y Estrin |
| ½-½ | 16 | 1972 | 7th Correspondence World Championship | B36 Sicilian, Accelerated Fianchetto |
Kibitzing
