| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 26. S Webb vs J D Tisdall |
| 1-0 | 39 |
1977 |
Hastings | A04 Reti Opening |
| 27. Browne vs J D Tisdall |
| ½-½ | 37 |
1977 |
Orense (Spain) | D63 Queen's Gambit Declined, Orthodox Defense |
| 28. K Regan vs J D Tisdall |
| 1-0 | 41 |
1977 |
open | B06 Robatsch |
| 29. J D Tisdall vs Hort |
| 0-1 | 48 |
1977 |
Hastings | B57 Sicilian |
| 30. J D Tisdall vs A J Mestel |
| 0-1 | 37 |
1977 |
Hastings | E70 King's Indian |
| 31. J D Tisdall vs Nickoloff |
| 1-0 | 36 |
1977 |
open | A57 Benko Gambit |
| 32. J D Tisdall vs S Kagan |
 | 1-0 | 82 |
1977 |
Hastings | A04 Reti Opening |
| 33. Keene vs J D Tisdall |
| 1-0 | 30 |
1977 |
Orense (Spain) | A28 English |
| 34. J D Tisdall vs P Cleghorn |
| 1-0 | 28 |
1977 |
open | C06 French, Tarrasch |
| 35. Dzindzichashvili vs J D Tisdall |
| 1-0 | 29 |
1977 |
Hastings (England) | A07 King's Indian Attack |
| 36. Tarjan vs J D Tisdall |
| ½-½ | 20 |
1977 |
Hastings | D33 Queen's Gambit Declined, Tarrasch |
| 37. H Olafsson vs J D Tisdall |
| 1-0 | 38 |
1977 |
open | A17 English |
| 38. Nunn vs J D Tisdall |
| 0-1 | 57 |
1977 |
Hastings | B33 Sicilian |
| 39. G Botterill vs J D Tisdall |
| 0-1 | 37 |
1977 |
Hastings | D60 Queen's Gambit Declined, Orthodox Defense |
| 40. W Martz vs J D Tisdall |
| ½-½ | 31 |
1977 |
open | E10 Queen's Pawn Game |
| 41. J D Tisdall vs Fedorowicz |
| ½-½ | 18 |
1977 |
Hastings | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 42. J D Tisdall vs Martinovsky |
| 1-0 | 41 |
1977 |
open | B82 Sicilian, Scheveningen |
| 43. J D Tisdall vs Sveshnikov |
| 0-1 | 32 |
1977 |
Hastings | D43 Queen's Gambit Declined Semi-Slav |
| 44. J D Tisdall vs Gheorghiu |
| 0-1 | 41 |
1977 |
Orense | E14 Queen's Indian |
| 45. Shamkovich vs J D Tisdall |
| ½-½ | 42 |
1978 |
Hastings (England) | B33 Sicilian |
| 46. J D Tisdall vs L Day |
| ½-½ | 22 |
1980 |
Quebec Open | D38 Queen's Gambit Declined, Ragozin Variation |
| 47. L Day vs J D Tisdall |
| 1-0 | 42 |
1980 |
Brighton | B21 Sicilian, 2.f4 and 2.d4 |
| 48. J D Tisdall vs G Lee |
 | 1-0 | 18 |
1981 |
London | B40 Sicilian |
| 49. Adorjan vs J D Tisdall |
 | 1-0 | 23 |
1981 |
New York Edward Lasker Turnier | D33 Queen's Gambit Declined, Tarrasch |
| 50. J D Tisdall vs L Day |
| ½-½ | 58 |
1981 |
04, New York | A53 Old Indian |