| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. M Vecchi vs G Piva |
| 0-1 | 20 | 1992 | Porto San Giorgio Open | E07 Catalan, Closed |
| 2. G Piva vs V Chernov |
| ½-½ | 54 | 1994 | Val Thorens op | A53 Old Indian |
| 3. V Malaniuk vs G Piva |
| 1-0 | 38 | 1995 | Montecatini Terme op | D27 Queen's Gambit Accepted, Classical |
| 4. G Piva vs S Mariotti |
| 0-1 | 32 | 1997 | Montecatini Terme Open | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 5. D Boldini vs G Piva |
| 0-1 | 14 | 1998 | Bratto Open | A06 Reti Opening |
| 6. P Battaggia vs G Piva |
| 1-0 | 30 | 1998 | Bratto Open | D27 Queen's Gambit Accepted, Classical |
| 7. A Capece vs G Piva |
| ½-½ | 46 | 1998 | Bratto Open | A11 English, Caro-Kann Defensive System |
| 8. V Eynard vs G Piva |
| ½-½ | 46 | 1998 | Bratto Open | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 9. G Piva vs D Gurevich |
| 0-1 | 39 | 1998 | Bratto Open | A45 Queen's Pawn Game |
| 10. G Piva vs G Machin |
| 0-1 | 46 | 1998 | Bratto Open | D00 Queen's Pawn Game |
| 11. G Piva vs G Oppici |
| ½-½ | 92 | 1998 | Bratto Open | A41 Queen's Pawn Game (with ...d6) |
| 12. G Piva vs L R Ragonese |
| ½-½ | 41 | 1998 | Bratto Open | E80 King's Indian, Samisch Variation |
| 13. D Ruzzier vs G Piva |
| 1-0 | 27 | 1998 | Bratto Open | D27 Queen's Gambit Accepted, Classical |
| 14. F Manca vs G Piva |
| 1-0 | 30 | 1999 | Montecatini Terme Open | B22 Sicilian, Alapin |
| 15. C Marzano vs G Piva |
| 1-0 | 30 | 1999 | Montecatini Terme Open | D02 Queen's Pawn Game |
| 16. S Drazic vs G Piva |
| 1-0 | 62 | 2001 | Bratto Open-A | A00 Uncommon Opening |
| 17. G Piva vs F Galli |
| ½-½ | 31 | 2001 | Bratto Open-A | D10 Queen's Gambit Declined Slav |
| 18. L Radice vs G Piva |
| ½-½ | 16 | 2001 | Bratto Open-A | D07 Queen's Gambit Declined, Chigorin Defense |
| 19. G Piva vs M Pagnoncelli |
| 0-1 | 53 | 2001 | Bratto Open-A | A45 Queen's Pawn Game |
| 20. A Ricci vs G Piva |
| ½-½ | 51 | 2001 | Bratto Open-A | B76 Sicilian, Dragon, Yugoslav Attack |
| 21. G Piva vs T Nieus |
| 0-1 | 41 | 2001 | Bratto Open-A | A45 Queen's Pawn Game |
| 22. E Bozzali vs G Piva |
| 0-1 | 29 | 2001 | Bratto Open-A | B77 Sicilian, Dragon, Yugoslav Attack |
| 23. V Valori vs G Piva |
| 0-1 | 33 | 2001 | Bratto Open-A | B23 Sicilian, Closed |
| 24. G Piva vs M Mascheroni |
 | ½-½ | 3 | 2001 | Bratto Open-A | A45 Queen's Pawn Game |
| 25. G Piva vs G Borgo |
| 0-1 | 38 | 2002 | Bratto Open | D31 Queen's Gambit Declined |
Kibitzing
