| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Kotronias vs I Papaioannou |
| 1-0 | 40 |
1996 |
Ch Greece | B12 Caro-Kann Defense |
| 2. Tringov vs I Papaioannou |
| ½-½ | 46 |
1997 |
Ikaros/Thessaloniki | B14 Caro-Kann, Panov-Botvinnik Attack |
| 3. K Markidis vs I Papaioannou |
| 0-1 | 36 |
1998 |
48th Greek Championships | B17 Caro-Kann, Steinitz Variation |
| 4. Adams vs I Papaioannou |
 | 1-0 | 33 |
2000 |
34th Olympiad | B14 Caro-Kann, Panov-Botvinnik Attack |
| 5. P Ricardi vs I Papaioannou |
| ½-½ | 61 |
2002 |
Bled Olympiad | B17 Caro-Kann, Steinitz Variation |
| 6. R Matoewi vs I Papaioannou |
| 0-1 | 64 |
2002 |
Bled Olympiad | B17 Caro-Kann, Steinitz Variation |
| 7. Delchev vs I Papaioannou |
| ½-½ | 66 |
2004 |
36th Olympiad | B16 Caro-Kann, Bronstein-Larsen Variation |
| 8. M Perunovic vs I Papaioannou |
| ½-½ | 45 |
2004 |
36th Olympiad | B12 Caro-Kann Defense |
| 9. J Gallagher vs I Papaioannou |
| ½-½ | 17 |
2005 |
15th European Team Championship | B17 Caro-Kann, Steinitz Variation |
| 10. N Managadze vs I Papaioannou |
| 0-1 | 55 |
2005 |
34th Greek Teams Championship | B17 Caro-Kann, Steinitz Variation |
| 11. Krum Georgiev vs I Papaioannou |
| ½-½ | 11 |
2006 |
35th Greek Team Championship | B11 Caro-Kann, Two Knights, 3...Bg4 |
| 12. F Manca vs I Papaioannou |
| 0-1 | 38 |
2007 |
European Team Chess Championships | B17 Caro-Kann, Steinitz Variation |
| 13. P Gengler vs I Papaioannou |
| 0-1 | 36 |
2007 |
European Team Chess Championships | B16 Caro-Kann, Bronstein-Larsen Variation |
