| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. S Mariotti vs Minic |
| 0-1 | 41 |
1969 |
Praia | B50 Sicilian |
| 2. S Mariotti vs G Eppinger |
| 1-0 | 20 |
1969 |
Italia | B90 Sicilian, Najdorf |
| 3. S Mariotti vs Vila |
| 1-0 | 29 |
1972 |
Skopje-Krusevo-Ohrid | B89 Sicilian |
| 4. S Mariotti vs Pinson |
| 1-0 | 24 |
1973 |
corr 1.EU tt, Vorrunde | B48 Sicilian, Taimanov Variation |
| 5. S Mariotti vs Larsen |
 | 0-1 | 37 |
1975 |
Milan | B20 Sicilian |
| 6. S Mariotti vs Polugaevsky |
| 1-0 | 62 |
1975 |
Budapest | B53 Sicilian |
| 7. S Mariotti vs Furman |
| 0-1 | 45 |
1975 |
Portoroz/Ljubljana | B42 Sicilian, Kan |
| 8. S Mariotti vs Browne |
| 0-1 | 42 |
1975 |
? | B53 Sicilian |
| 9. S Mariotti vs S Holm |
| 1-0 | 36 |
1975 |
Budapest | B20 Sicilian |
| 10. S Mariotti vs Sosonko |
| 0-1 | 37 |
1975 |
Ostenda | B53 Sicilian |
| 11. S Mariotti vs Ljubojevic |
| ½-½ | 40 |
1975 |
Portoroz/Ljubljana 19/454 | B90 Sicilian, Najdorf |
| 12. S Mariotti vs Velimirovic |
| 0-1 | 50 |
1975 |
Portoroz/Ljubljana | B73 Sicilian, Dragon, Classical |
| 13. S Mariotti vs Tal |
| 0-1 | 26 |
1975 |
Milano | B49 Sicilian, Taimanov Variation |
| 14. S Mariotti vs P Ostojic |
| 1-0 | 42 |
1976 |
Stockholm | B30 Sicilian |
| 15. S Mariotti vs Polugaevsky |
| ½-½ | 46 |
1976 |
Manila | B46 Sicilian, Taimanov Variation |
| 16. S Mariotti vs Browne |
| ½-½ | 41 |
1976 |
Izt ( cat. 12 ) | B56 Sicilian |
| 17. S Mariotti vs Ribli |
| 0-1 | 64 |
1976 |
Izt ( cat. 12 ) | B96 Sicilian, Najdorf |
| 18. S Mariotti vs Quinteros |
| 1-0 | 35 |
1976 |
Izt ( cat. 12 ) | B41 Sicilian, Kan |
| 19. S Mariotti vs Balashov |
| ½-½ | 48 |
1976 |
Manila | B81 Sicilian, Scheveningen, Keres Attack |
| 20. S Mariotti vs Kavalek |
| 1-0 | 39 |
1976 |
Manila | B32 Sicilian |
| 21. S Mariotti vs Browne |
| ½-½ | 41 |
1976 |
Manila | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 22. S Mariotti vs Karpov |
| 0-1 | 72 |
1977 |
cat. 13, It , Leningrad | B46 Sicilian, Taimanov Variation |
| 23. S Mariotti vs G Kuzmin |
| 1-0 | 49 |
1977 |
It ( cat. 13 ) | B20 Sicilian |
| 24. S Mariotti vs Gheorghiu |
| 0-1 | 34 |
1977 |
It ( cat. 13 ) | B41 Sicilian, Kan |
| 25. S Mariotti vs Tal |
| 0-1 | 42 |
1977 |
It ( cat. 13 ) | B53 Sicilian |
