| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. F Winiwarter vs O Marthaler |
| ½-½ | 41 | 1958 | Reggio Emilia 1958/59 | B63 Sicilian, Richter-Rauzer Attack |
| 2. G Vittiglio vs O Marthaler |
| 0-1 | 42 | 1958 | Reggio Emilia 1958/59 | E66 King's Indian, Fianchetto, Yugoslav Panno |
| 3. O Marthaler vs G Piccinini |
| 1-0 | 28 | 1958 | Reggio Emilia 1958/59 | A48 King's Indian |
| 4. G Primavera vs O Marthaler |
| 0-1 | 44 | 1958 | Reggio Emilia 1958/59 | E81 King's Indian, Samisch |
| 5. O Marthaler vs J Stupica |
| ½-½ | 18 | 1958 | Reggio Emilia 1958/59 | D79 Neo-Grunfeld, 6.O-O, Main line |
| 6. A Siveri vs O Marthaler |
| 0-1 | 63 | 1959 | Reggio Emilia 1958/59 | B83 Sicilian |
| 7. O Marthaler vs J A Seitz |
| 1-0 | 30 | 1959 | Reggio Emilia 1958/59 | D53 Queen's Gambit Declined |
| 8. E Paoli vs O Marthaler |
| 0-1 | 41 | 1959 | Reggio Emilia 1958/59 | B30 Sicilian |
| 9. O Marthaler vs J Fricker |
| 1-0 | 22 | 1959 | Reggio Emilia 1958/59 | D20 Queen's Gambit Accepted |
| 10. O Marthaler vs V Castaldi |
| ½-½ | 23 | 1959 | Clare Benedict Cup | A04 Reti Opening |
| 11. F Auer vs O Marthaler |
| ½-½ | 58 | 1959 | Clare Benedict Cup | A04 Reti Opening |
| 12. O Marthaler vs J van Steenis |
| 1-0 | 44 | 1959 | Clare Benedict Cup | D06 Queen's Gambit Declined |
| 13. J Llado Lumbera vs O Marthaler |
| ½-½ | 14 | 1959 | Clare Benedict Cup | C62 Ruy Lopez, Old Steinitz Defense |
| 14. O Marthaler vs Keres |
| 0-1 | 28 | 1959 | Casual | A07 King's Indian Attack |
| 15. O Marthaler vs A Kinzel |
| ½-½ | 28 | 1959 | Reggio Emilia 1959/60 | D02 Queen's Pawn Game |
| 16. J Fricker vs O Marthaler |
| 0-1 | 31 | 1959 | Reggio Emilia 1959/60 | E65 King's Indian, Fianchetto, Yugoslav, 7.O-O |
| 17. O Marthaler vs L Lilloni |
| ½-½ | 20 | 1959 | Reggio Emilia 1959/60 | D10 Queen's Gambit Declined Slav |
| 18. A Siveri vs O Marthaler |
| 0-1 | 61 | 1959 | Reggio Emilia 1959/60 | B83 Sicilian |
| 19. O Marthaler vs C Trampuz |
| ½-½ | 15 | 1959 | Reggio Emilia 1959/60 | B40 Sicilian |
| 20. M Bely vs O Marthaler |
| ½-½ | 20 | 1959 | Reggio Emilia 1959/60 | B63 Sicilian, Richter-Rauzer Attack |
| 21. J A Seitz vs O Marthaler |
| ½-½ | 16 | 1960 | Reggio Emilia 1959/60 | A49 King's Indian, Fianchetto without c4 |
| 22. O Marthaler vs E Romani |
| 1-0 | 33 | 1960 | Reggio Emilia 1959/60 | B06 Robatsch |
| 23. P Schrafl vs O Marthaler |
| 0-1 | 43 | 1961 | Graz | E91 King's Indian |
| 24. O Marthaler vs Robatsch |
| ½-½ | 41 | 1961 | Graz | A40 Queen's Pawn Game |
| 25. L Rellstab vs O Marthaler |
| 1-0 | 62 | 1961 | Graz | B74 Sicilian, Dragon, Classical |
Kibitzing
