| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 551. S Swanson vs J Penrose |
| ½-½ | 16 | 1974 | British Championship | A00 Uncommon Opening |
| 552. J Penrose vs D Mabbs |
| ½-½ | 26 | 1974 | British Championship | C84 Ruy Lopez, Closed |
| 553. Nunn vs J Penrose |
| ½-½ | 17 | 1974 | British Championship | A00 Uncommon Opening |
| 554. J Penrose vs I Sinclair |
| ½-½ | 30 | 1974 | British Championship | B14 Caro-Kann, Panov-Botvinnik Attack |
| 555. J Penrose vs R Webb |
| ½-½ | 26 | 1974 | British Championship | C65 Ruy Lopez, Berlin Defense |
| 556. O Hardy vs J Penrose |
| 0-1 | 27 | 1974 | British Championship | A44 Old Benoni Defense |
| 557. J Penrose vs P W Hempson |
| 1-0 | 39 | 1974 | British Championship | C04 French, Tarrasch, Guimard Main line |
| 558. A H Williams vs J Penrose |
 | 1-0 | 26 | 1974 | British Championship | D27 Queen's Gambit Accepted, Classical |
| 559. J Penrose vs J Horner |
| 1-0 | 41 | 1974 | British Championship | C92 Ruy Lopez, Closed |
| 560. A H Perkins vs J Penrose |
| ½-½ | 30 | 1974 | British Championship | A44 Old Benoni Defense |
| 561. J Aijala vs J Penrose |
| 0-1 | 30 | 1975 | GB - Finland corr m | A33 English, Symmetrical |
| 562. J G Nicholson vs J Penrose |
| ½-½ | 27 | 1975 | British Championship | B81 Sicilian, Scheveningen, Keres Attack |
| 563. J Penrose vs J Horner |
| ½-½ | 23 | 1975 | British Championship | C82 Ruy Lopez, Open |
| 564. O M Hindle vs J Penrose |
| ½-½ | 25 | 1975 | British Championship | B83 Sicilian |
| 565. J Penrose vs A H Perkins |
| ½-½ | 21 | 1975 | British Championship | C93 Ruy Lopez, Closed, Smyslov Defense |
| 566. B Cafferty vs J Penrose |
| 0-1 | 36 | 1975 | British Championship | D32 Queen's Gambit Declined, Tarrasch |
| 567. J Penrose vs Speelman |
| ½-½ | 25 | 1975 | British Championship | B57 Sicilian |
| 568. V Knox vs J Penrose |
| ½-½ | 25 | 1975 | British Championship | B83 Sicilian |
| 569. J Penrose vs P H Clarke |
| ½-½ | 21 | 1975 | British Championship | A17 English |
| 570. J Penrose vs B Eley |
| ½-½ | 18 | 1975 | British Championship | C41 Philidor Defense |
| 571. C Pritchett vs J Penrose |
| ½-½ | 36 | 1975 | British Championship | B83 Sicilian |
| 572. J Penrose vs Miles |
| ½-½ | 15 | 1975 | British Championship | B09 Pirc, Austrian Attack |
| 573. R Emerson vs J Penrose |
| ½-½ | 26 | 1976 | County Championship | B81 Sicilian, Scheveningen, Keres Attack |
| 574. J Penrose vs J Tompa |
| 1-0 | 30 | 1977 | olm8 fin B4 corr | B43 Sicilian, Kan, 5.Nc3 |
| 575. A Anton vs J Penrose |
| 0-1 | 50 | 1977 | olm9 corr7789 | D29 Queen's Gambit Accepted, Classical |
Kibitzing
