| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. I Papaioannou vs T Gelashvili |
| 1-0 | 44 |
1999 |
Chania op 9th | E06 Catalan, Closed, 5.Nf3 |
| 2. I Papaioannou vs Ehlvest |
| ½-½ | 29 |
2000 |
34th Olympiad | E06 Catalan, Closed, 5.Nf3 |
| 3. I Papaioannou vs J Gonzalez |
 | 0-1 | 35 |
2004 |
36th Olympiad | E06 Catalan, Closed, 5.Nf3 |
| 4. I Papaioannou vs S Azarov |
| 1-0 | 35 |
2008 |
2008 Olympiad | E06 Catalan, Closed, 5.Nf3 |
| 5. I Papaioannou vs Beliavsky |
| ½-½ | 24 |
2009 |
17th European Team Championship | E06 Catalan, Closed, 5.Nf3 |
| 6. I Papaioannou vs V Laznicka |
| ½-½ | 41 |
2009 |
World Cup | E06 Catalan, Closed, 5.Nf3 |