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| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. Browne vs S Mariotti |
 | 1-0 | 30 | 1971 | Venice | C64 Ruy Lopez, Classical |
| 2. A Zichichi vs S Mariotti |
| 0-1 | 26 | 1971 | Venice | C64 Ruy Lopez, Classical |
| 3. M Klein vs S Mariotti |
| 0-1 | 27 | 1972 | Florence | C64 Ruy Lopez, Classical |
| 4. W Hug vs S Mariotti |
| 0-1 | 34 | 1974 | Nice Olympiad Final-B | C64 Ruy Lopez, Classical |
| 5. J Tarjan vs S Mariotti |
| 1-0 | 26 | 1974 | Venice | C64 Ruy Lopez, Classical |
| 6. P Ostojic vs S Mariotti |
| 1-0 | 35 | 1974 | Venice | C64 Ruy Lopez, Classical |
| 7. Karpov vs S Mariotti |
 | 1-0 | 22 | 1975 | Vidmar Memorial | C64 Ruy Lopez, Classical |
| 8. L Vogt vs S Mariotti |
| 0-1 | 61 | 1977 | October Revolution 60th Anniversary | C64 Ruy Lopez, Classical |
| 9. G Makropoulos vs S Mariotti |
| ½-½ | 27 | 1980 | Rome | C64 Ruy Lopez, Classical |
| 10. A Matanovic vs S Mariotti |
| ½-½ | 12 | 1981 | Rome | C64 Ruy Lopez, Classical |
| 11. Unzicker vs S Mariotti |
| ½-½ | 10 | 1982 | Banco di Roma | C64 Ruy Lopez, Classical |
| 12. M Jadoul vs S Mariotti |
| 0-1 | 28 | 1986 | Dubai Olympiad | C64 Ruy Lopez, Classical |
| 13. S Martinovic vs S Mariotti |
| 0-1 | 55 | 1989 | Chianciano Open | C64 Ruy Lopez, Classical |
| 14. D Barlov vs S Mariotti |
| 1-0 | 51 | 1990 | Rome Open | C64 Ruy Lopez, Classical |
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Kibitzing
