| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. P Youngworth vs Shamkovich |
| 0-1 | 30 |
1978 |
Lone Pine (USA) | A62 Benoni, Fianchetto Variation |
| 2. P Youngworth vs K Rogoff |
| 0-1 | 46 |
1978 |
Lone Pine | A63 Benoni, Fianchetto, 9...Nbd7 |
| 3. H Van Riemsdijk vs P Youngworth |
| 0-1 | 34 |
1978 |
Lone Pine | B87 Sicilian, Fischer-Sozin with ...a6 and ...b5 |
| 4. P Youngworth vs H Olafsson |
| 0-1 | 34 |
1978 |
Lone Pine | E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation |
| 5. J Whitehead vs P Youngworth |
| 0-1 | 37 |
1979 |
Lone Pine op | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 6. P Youngworth vs E Formanek |
| 0-1 | 29 |
1979 |
Lone Pine op | A27 English, Three Knights System |
| 7. P Youngworth vs Petursson |
| 0-1 | 54 |
1979 |
Lone Pine USA | E01 Catalan, Closed |
| 8. M Zlotnikov vs P Youngworth |
| 0-1 | 59 |
1979 |
Lone Pine op | A36 English |
| 9. P Youngworth vs S Nikolic |
| 0-1 | 74 |
1979 |
Lone Pine op | A28 English |
| 10. P Youngworth vs Gligoric |
 | 0-1 | 84 |
1980 |
Lone Pine op | D34 Queen's Gambit Declined, Tarrasch |
| 11. E Michaelides vs P Youngworth |
| 0-1 | 65 |
1980 |
Lone Pine (05*) | A16 English |
| 12. P Youngworth vs J Peters |
| 0-1 | 36 |
1980 |
Lone Pine | A62 Benoni, Fianchetto Variation |
| 13. P Youngworth vs V Raicevic |
| 0-1 | 39 |
1980 |
Lone Pine | D37 Queen's Gambit Declined |
| 14. R Sulman vs P Youngworth |
| 0-1 | 41 |
1981 |
Lone Pine | A07 King's Indian Attack |
| 15. P Youngworth vs Dzindzichashvili |
| 0-1 | 59 |
1981 |
Lone Pine (USA) | E41 Nimzo-Indian |
| 16. P Youngworth vs J L Arnason |
| 0-1 | 50 |
1981 |
Lone Pine | A64 Benoni, Fianchetto, 11...Re8 |
| 17. P Youngworth vs DeFirmian |
 | 0-1 | 37 |
1981 |
Lone Pine (USA) | A62 Benoni, Fianchetto Variation |