| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. E Michaelides vs P Youngworth |
| 0-1 | 65 | 1980 | Lone Pine | A16 English |
| 27. P Youngworth vs P Biyiasas |
| 1-0 | 48 | 1980 | Lone Pine | E98 King's Indian, Orthodox, Taimanov, 9.Ne1 |
| 28. P Youngworth vs Gligoric |
 | 0-1 | 84 | 1980 | Lone Pine | D34 Queen's Gambit Declined, Tarrasch |
| 29. de Firmian vs P Youngworth |
| 1-0 | 43 | 1980 | Lone Pine | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 30. P Youngworth vs V Raicevic |
| 0-1 | 39 | 1980 | Lone Pine | D37 Queen's Gambit Declined |
| 31. P Youngworth vs J Arnason |
| 0-1 | 50 | 1981 | Lone Pine Open | A64 Benoni, Fianchetto, 11...Re8 |
| 32. R Henley vs P Youngworth |
| 1-0 | 31 | 1981 | Lone Pine Open | E94 King's Indian, Orthodox |
| 33. M Wilder vs P Youngworth |
| ½-½ | 35 | 1981 | Lone Pine Open | E12 Queen's Indian |
| 34. P Youngworth vs Dzindzichashvili |
| 0-1 | 59 | 1981 | Lone Pine Open | E41 Nimzo-Indian |
| 35. D Gurevich vs P Youngworth |
| ½-½ | 34 | 1981 | Lone Pine Open | B12 Caro-Kann Defense |
| 36. P Youngworth vs de Firmian |
| 0-1 | 37 | 1981 | Lone Pine Open | A62 Benoni, Fianchetto Variation |
| 37. R Sulman vs P Youngworth |
| 0-1 | 41 | 1981 | Lone Pine Open | A07 King's Indian Attack |
| 38. P Youngworth vs I Wells |
| 1-0 | 63 | 1981 | Lone Pine Open | E43 Nimzo-Indian, Fischer Variation |
| 39. P Youngworth vs A Soltis |
| ½-½ | 58 | 1981 | Spring Open | E95 King's Indian, Orthodox, 7...Nbd7, 8.Re1 |
| 40. R Mann vs P Youngworth |
| ½-½ | 40 | 1981 | Phoenix 2nd FIDE Futurity | A13 English |
| 41. W J Adam vs P Youngworth |
| 1-0 | 60 | 1981 | Phoenix 2nd FIDE Futurity | B14 Caro-Kann, Panov-Botvinnik Attack |
| 42. P Youngworth vs P Carrasco |
| 0-1 | 48 | 1981 | 82nd US Open | A33 English, Symmetrical |
| 43. S Cross vs P Youngworth |
| 0-1 | 42 | 1981 | 82nd US Open | E90 King's Indian |
| 44. P Youngworth vs W B Abbott |
| 1-0 | 37 | 1981 | 82nd US Open | E41 Nimzo-Indian |
| 45. A Soltis vs P Youngworth |
| 1-0 | 36 | 1981 | 82nd US Open | A07 King's Indian Attack |
| 46. A Soltis vs P Youngworth |
| 1-0 | 36 | 1981 | 82nd US Open | A07 King's Indian Attack |
| 47. D Kopec vs P Youngworth |
| 1-0 | 28 | 1984 | Anaheim Labate | E67 King's Indian, Fianchetto |
| 48. A Soltis vs P Youngworth |
| ½-½ | 44 | 1984 | CCA International | B23 Sicilian, Closed |
| 49. K Shirazi vs P Youngworth |
| 1-0 | 29 | 1987 | Labate's | B18 Caro-Kann, Classical |
Kibitzing
