| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. S Mareco vs E Real de Azua |
| ½-½ | 30 | 2008 | Villa Martelli | D17 Queen's Gambit Declined Slav |
| 2. S Mareco vs R Felgaer |
| 1-0 | 50 | 2009 | Argentinian Championship | D17 Queen's Gambit Declined Slav |
| 3. S Mareco vs J F Cubas |
| 1-0 | 32 | 2009 | zt 2.5 | D17 Queen's Gambit Declined Slav |
| 4. S Mareco vs R Felgaer |
| 1-0 | 38 | 2009 | zt 2.5 | D17 Queen's Gambit Declined Slav |
| 5. S Mareco vs F de Cresce El Debs |
| ½-½ | 26 | 2010 | Vanderley Cason Melo Mem | D17 Queen's Gambit Declined Slav |
| 6. S Mareco vs R Leitao |
| ½-½ | 22 | 2010 | 9th Mario Covas Jr | D17 Queen's Gambit Declined Slav |
| 7. S Mareco vs T L Petrosian |
| 0-1 | 44 | 2011 | Aeroflot Open | D17 Queen's Gambit Declined Slav |
Kibitzing
