| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. G Simms vs E Formanek |
 | 0-1 | 18 |
1967 |
US Open | B59 Sicilian, Boleslavsky Variation, 7.Nb3 |
| 2. Nunn vs E Formanek |
| 0-1 | 36 |
1973 |
London-B | B56 Sicilian |
| 3. E Paoli vs E Formanek |
| ½-½ | 104 |
1975 |
Reggio Emilia 7576 | B83 Sicilian |
| 4. C Barnes vs E Formanek |
| 0-1 | 34 |
1976 |
Lone Pine | B24 Sicilian, Closed |
| 5. Bisguier vs E Formanek |
| 0-1 | 38 |
1977 |
Lone Pine | B21 Sicilian, 2.f4 and 2.d4 |
| 6. Van der Sterren vs E Formanek |
| 0-1 | 46 |
1978 |
Lone Pine | B33 Sicilian |
| 7. Plaskett vs E Formanek |
| ½-½ | 75 |
1979 |
Marshall op | B69 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 11.Bxf6 |
| 8. Jansa vs E Formanek |
| ½-½ | 58 |
1991 |
Gausdal Arnold Cup | B67 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7 |
| 9. D Garcia Mosquera vs E Formanek |
| ½-½ | 33 |
1996 |
St Cugat op | B21 Sicilian, 2.f4 and 2.d4 |
| 10. C B Gibson vs E Formanek |
| 0-1 | 67 |
2001 |
29th World Open | B32 Sicilian |
| 11. F Aleskerov vs E Formanek |
| 1-0 | 21 |
2008 |
Foxwoods Open | B40 Sicilian |
| 12. A Greet vs E Formanek |
| 1-0 | 42 |
2008 |
83rd Hastings Chess Congress | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |