| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. J Cooper vs L Schorr |
| 1-0 | 39 | 1976 | Haifa Olympiad | A55 Old Indian, Main line |
| 27. S Rubanraut vs J Cooper |
| 1-0 | 36 | 1976 | Haifa Olympiad | E77 King's Indian |
| 28. J Cooper vs E Raaste |
| ½-½ | 44 | 1976 | Haifa Olympiad | E30 Nimzo-Indian, Leningrad |
| 29. J Cooper vs G Scholz Solis |
| 1-0 | 80 | 1976 | Haifa Olympiad | E31 Nimzo-Indian, Leningrad, Main line |
| 30. J Cooper vs K Commons |
 | ½-½ | 41 | 1976 | Haifa Olympiad | E31 Nimzo-Indian, Leningrad, Main line |
| 31. J Cooper vs D Mayers |
| ½-½ | 25 | 1977 | 1st Lloyds Bank Masters Open | E30 Nimzo-Indian, Leningrad |
| 32. J Cooper vs J C Benjamin |
| 1-0 | 42 | 1977 | 1st Lloyds Bank Masters Open | E94 King's Indian, Orthodox |
| 33. C Pritchett vs J Cooper |
| 1-0 | 41 | 1977 | 1st Lloyds Bank Masters Open | C95 Ruy Lopez, Closed, Breyer |
| 34. J Cooper vs D I Patrick |
| 1-0 | 36 | 1977 | 1st Lloyds Bank Masters Open | D55 Queen's Gambit Declined |
| 35. T B Bennett vs J Cooper |
| ½-½ | 16 | 1977 | 1st Lloyds Bank Masters Open | B08 Pirc, Classical |
| 36. J G Nicholson vs J Cooper |
| ½-½ | 24 | 1977 | 1st Lloyds Bank Masters Open | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 37. J Cooper vs M Basman |
| 0-1 | 32 | 1977 | 1st Lloyds Bank Masters Open | A09 Reti Opening |
| 38. G Flear vs J Cooper |
| 0-1 | 58 | 1978 | British Championship | E92 King's Indian |
| 39. J Cooper vs A Whiteley |
 | 1-0 | 35 | 1978 | British Championship | D87 Grunfeld, Exchange |
| 40. J Horner vs J Cooper |
| 0-1 | 40 | 1978 | British Championship | C78 Ruy Lopez |
| 41. J Cooper vs Plaskett |
| 0-1 | 39 | 1978 | British Championship | E30 Nimzo-Indian, Leningrad |
| 42. J Cooper vs D J Findlay |
| 1-0 | 25 | 1978 | British Championship | D24 Queen's Gambit Accepted |
| 43. G D Lee vs J Cooper |
| 0-1 | 33 | 1978 | British Championship | C02 French, Advance |
| 44. J Cooper vs J Littlewood |
| 1-0 | 42 | 1978 | British Championship | A49 King's Indian, Fianchetto without c4 |
| 45. Speelman vs J Cooper |
| 1-0 | 37 | 1978 | British Championship | E96 King's Indian, Orthodox, 7...Nbd7, Main line |
| 46. P Littlewood vs J Cooper |
| ½-½ | 43 | 1978 | British Championship | C02 French, Advance |
| 47. J Cooper vs J Mestel |
| 0-1 | 57 | 1978 | British Championship | D31 Queen's Gambit Declined |
| 48. R Bellin vs J Cooper |
| ½-½ | 33 | 1978 | British Championship | D00 Queen's Pawn Game |
| 49. J Cooper vs Petrosian |
| 0-1 | 49 | 1978 | Buenos Aires Olympiad | E30 Nimzo-Indian, Leningrad |
| 50. C Lee vs J Cooper |
| 0-1 | 33 | 1978 | Buenos Aires Olympiad | E73 King's Indian |
Kibitzing
