| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. Lombardy vs E Formanek |
| 1-0 | 46 | 1962 | 63rd US Open | C83 Ruy Lopez, Open |
| 2. E Formanek vs N Leopoldi |
| 0-1 | 44 | 1963 | Illinois op | D09 Queen's Gambit Declined, Albin Counter Gambit, 5.g3 |
| 3. Lombardy vs E Formanek |
| 1-0 | 25 | 1964 | 65th US Open | D78 Neo-Grunfeld, 6.O-O c6 |
| 4. D Strenzwilk vs E Formanek |
| 0-1 | 64 | 1964 | 65th US Open | C13 French |
| 5. E Formanek vs K R Smith |
| 0-1 | 17 | 1965 | 66th US Open | D52 Queen's Gambit Declined |
| 6. E Zemgalis vs E Formanek |
| ½-½ | 19 | 1966 | 67th US Open | A02 Bird's Opening |
| 7. E Formanek vs A Spiller |
| 1-0 | 24 | 1966 | 67th US Open | B77 Sicilian, Dragon, Yugoslav Attack |
| 8. D Fritzinger vs E Formanek |
| 0-1 | 27 | 1966 | 67th US Open | E65 King's Indian, Fianchetto, Yugoslav, 7.O-O |
| 9. Robert E Byrne vs E Formanek |
| 1-0 | 54 | 1966 | 67th US Open | D25 Queen's Gambit Accepted |
| 10. E Formanek vs S Matera |
| 1-0 | 35 | 1966 | 67th US Open | D82 Grunfeld, 4.Bf4 |
| 11. L Jackson vs E Formanek |
 | 1-0 | 26 | 1966 | 67th US Open | C14 French, Classical |
| 12. W Goichberg vs E Formanek |
| ½-½ | 35 | 1966 | 67th US Open | B32 Sicilian |
| 13. E Formanek vs I Zalys |
| 1-0 | 21 | 1966 | 67th US Open | B28 Sicilian, O'Kelly Variation |
| 14. A J Ross vs E Formanek |
| 0-1 | 26 | 1967 | 68th US Open | C16 French, Winawer |
| 15. E Formanek vs W Slater |
| 1-0 | 39 | 1967 | 68th US Open | C13 French |
| 16. L Tapper vs E Formanek |
| 0-1 | 15 | 1967 | 68th US Open | A70 Benoni, Classical with 7.Nf3 |
| 17. E Formanek vs Rossolimo |
| 0-1 | 39 | 1967 | 68th US Open | B09 Pirc, Austrian Attack |
| 18. E Formanek vs F Metz |
 | 1-0 | 10 | 1967 | 68th US Open | C41 Philidor Defense |
| 19. E Formanek vs Saidy |
| 0-1 | 41 | 1967 | 68th US Open | B62 Sicilian, Richter-Rauzer |
| 20. G Simms vs E Formanek |
 | 0-1 | 18 | 1967 | 68th US Open | B59 Sicilian, Boleslavsky Variation, 7.Nb3 |
| 21. E Formanek vs Browne |
 | 1-0 | 37 | 1967 | 68th US Open | B62 Sicilian, Richter-Rauzer |
| 22. E Formanek vs Robert E Byrne |
 | 1-0 | 34 | 1967 | 68th US Open | C02 French, Advance |
| 23. Benko vs E Formanek |
| 1-0 | 37 | 1967 | 68th US Open | A00 Uncommon Opening |
| 24. J W Collins vs E Formanek |
| ½-½ | 67 | 1967 | 68th US Open | A61 Benoni |
| 25. E Formanek vs Joe Steffen |
| 1-0 | 35 | 1968 | 69th US Open | C04 French, Tarrasch, Guimard Main line |