| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. Y Rantanen vs D Sully |
| 1-0 | 19 | 1974 | Nice Olympiad Final-A | C91 Ruy Lopez, Closed |
| 27. D Sully vs G Tringov |
| 0-1 | 40 | 1974 | Nice Olympiad Final-A | A04 Reti Opening |
| 28. D Sully vs Ribli |
 | 0-1 | 31 | 1974 | Nice Olympiad Final-A | A04 Reti Opening |
| 29. D Sully vs J Pribyl |
| 1-0 | 32 | 1974 | Nice Olympiad Final-A | A04 Reti Opening |
| 30. D Sully vs F Kuijpers |
| 0-1 | 32 | 1974 | Nice Olympiad Final-A | A04 Reti Opening |
| 31. J Szmetan vs D Sully |
| 1-0 | 44 | 1974 | Nice Olympiad Final-A | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 32. J Tarjan vs D Sully |
| 1-0 | 37 | 1974 | Nice Olympiad Final-A | C95 Ruy Lopez, Closed, Breyer |
| 33. D Ghizdavu vs D Sully |
| 1-0 | 42 | 1974 | Nice Olympiad Final-A | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 34. Miles vs D Sully |
| ½-½ | 20 | 1975 | British Championship | E62 King's Indian, Fianchetto |
| 35. D Sully vs M J Haygarth |
| 0-1 | 35 | 1975 | British Championship | E11 Bogo-Indian Defense |
| 36. J G Nicholson vs D Sully |
 | 1-0 | 22 | 1975 | British Championship | B06 Robatsch |
| 37. G Bonner vs D Sully |
| ½-½ | 26 | 1975 | British Championship | B15 Caro-Kann |
| 38. D Sully vs P J Lee |
| ½-½ | 18 | 1975 | British Championship | E12 Queen's Indian |
| 39. D Sully vs A Ludgate |
| 0-1 | 42 | 1975 | British Championship | A13 English |
| 40. M McCarthy vs D Sully |
| ½-½ | 16 | 1975 | British Championship | B02 Alekhine's Defense |
| 41. P R Kemp vs D Sully |
| 1-0 | 71 | 1975 | British Championship | B03 Alekhine's Defense |
| 42. D Sully vs D B Pritchard |
| ½-½ | 49 | 1975 | British Championship | A04 Reti Opening |
| 43. D Sully vs F Parr |
| ½-½ | 31 | 1975 | British Championship | A99 Dutch, Ilyin-Genevsky Variation with b3 |
| 44. R O'Kelly vs D Sully |
| ½-½ | 30 | 1975 | British Championship | D80 Grunfeld |
| 45. J Hardinge vs D Sully |
| 1-0 | 31 | 1977 | v Cardiff A | B02 Alekhine's Defense |
| 46. D Sully vs I Jones |
| ½-½ | 23 | 1980 | Welsh Championship 1980/81 | A04 Reti Opening |
| 47. G Botterill vs D Sully |
| ½-½ | 74 | 1980 | Welsh Championship 1980/81 | D91 Grunfeld, 5.Bg5 |
| 48. D Sully vs J Cooper |
| ½-½ | 28 | 1980 | Welsh Championship 1980/81 | E06 Catalan, Closed, 5.Nf3 |
| 49. P Cunningham vs D Sully |
| ½-½ | 26 | 1980 | Welsh Championship 1980/81 | D85 Grunfeld |
| 50. D Sully vs J Cooper |
| ½-½ | 28 | 1981 | Welsh Championship 1981/82 | E06 Catalan, Closed, 5.Nf3 |
Kibitzing
