| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. J Whitehead vs P Youngworth |
| ½-½ | 39 |
1978 |
Lone Pine | B22 Sicilian, Alapin |
| 2. P Youngworth vs C Brasket |
| ½-½ | 46 |
1978 |
Lone Pine | D73 Neo-Grunfeld, 5.Nf3 |
| 3. P Youngworth vs K Rogoff |
| 0-1 | 46 |
1978 |
Lone Pine | A63 Benoni, Fianchetto, 9...Nbd7 |
| 4. P Youngworth vs P Erlingsson |
| 1-0 | 27 |
1978 |
Lone Pine | A58 Benko Gambit |
| 5. H Van Riemsdijk vs P Youngworth |
| 0-1 | 34 |
1978 |
Lone Pine | B87 Sicilian, Fischer-Sozin with ...a6 and ...b5 |
| 6. J Loftsson vs P Youngworth |
| 1-0 | 47 |
1978 |
Lone Pine | D94 Grunfeld |
| 7. P Youngworth vs Shamkovich |
| 0-1 | 30 |
1978 |
Lone Pine (USA) | A62 Benoni, Fianchetto Variation |
| 8. P Youngworth vs H Olafsson |
| 0-1 | 34 |
1978 |
Lone Pine | E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation |
| 9. D Verduga vs P Youngworth |
| 1-0 | 43 |
1978 |
Lone Pine | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 10. M Zlotnikov vs P Youngworth |
| 0-1 | 59 |
1979 |
Lone Pine op | A36 English |
| 11. P Youngworth vs Denker |
| ½-½ | 32 |
1979 |
Lone Pine op | E41 Nimzo-Indian |
| 12. G Ligterink vs P Youngworth |
 | 1-0 | 29 |
1979 |
Lone Pine op | B58 Sicilian |
| 13. R C Balinas vs P Youngworth |
| 1-0 | 38 |
1979 |
Lone Pine op | B20 Sicilian |
| 14. P Youngworth vs S Nikolic |
| 0-1 | 74 |
1979 |
Lone Pine op | A28 English |
| 15. P Youngworth vs E Formanek |
| 0-1 | 29 |
1979 |
Lone Pine op | A27 English, Three Knights System |
| 16. P Youngworth vs Petursson |
| 0-1 | 54 |
1979 |
Lone Pine USA | E01 Catalan, Closed |
| 17. V McCambridge vs P Youngworth |
| ½-½ | 29 |
1979 |
Lone Pine op | D97 Grunfeld, Russian |
| 18. J Whitehead vs P Youngworth |
| 0-1 | 37 |
1979 |
Lone Pine op | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 19. J Benjamin vs P Youngworth |
| ½-½ | 24 |
1980 |
5, Lone Pine op | E54 Nimzo-Indian, 4.e3, Gligoric System |
| 20. P Youngworth vs Biyiasas |
| 1-0 | 48 |
1980 |
Lone Pine | E99 King's Indian, Orthodox, Taimanov |
| 21. E Michaelides vs P Youngworth |
| 0-1 | 65 |
1980 |
Lone Pine (05*) | A16 English |
| 22. P Youngworth vs Gligoric |
 | 0-1 | 84 |
1980 |
Lone Pine op | D34 Queen's Gambit Declined, Tarrasch |
| 23. P Youngworth vs V Liberzon |
| ½-½ | 38 |
1980 |
Lone Pine | D89 Grunfeld |
| 24. D Rajkovic vs P Youngworth |
| 1-0 | 29 |
1980 |
Lone Pine | D90 Grunfeld |
| 25. DeFirmian vs P Youngworth |
 | 1-0 | 43 |
1980 |
Lone Pine (USA) | B99 Sicilian, Najdorf, 7...Be7 Main line |