Piira, Petri
Current rating: 1434
Record: 4-8
| Grand Prix Helsinki 2004 (COK limited) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 69 | Lindroos, Jani (1431) | Won 2-1 | +181464 |
| 2sealed | 8 | Ahtiainen, Esa (1483) | Lost 0-2 | -181446 |
| 3sealed | 106 | Salminen, Janne (1501) | Lost 1-2 | -171429 |
| 4sealed | 166 | Sorensen, Jan (1623) | Won 2-0 | +221451 |
| 5sealed | 159 | Lehtinen, Max (1502) | Lost 0-2 | -171434 |
| average opponent: 1508record: 2-3 | new rating: 1434 | |||
| Grand Prix Helsinki 2000 (INV limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 52 | Jalonen, Juha (1500) | Lost 1-2 | -181482 |
| 2sealed | 119 | Aaltonen, Jukka (1482) | Won 2-0 | +181500 |
| 3sealed | 87 | Peltonen, Niko (1500) | Lost 0-2 | -181482 |
| 4sealed | 149 | Turunen, Harri (1482) | Lost 1-2 | -181464 |
| 5sealed | 139 | Ivanov, Pavel (1465) | Won 2-0 | +181482 |
| 6sealed | 124 | Puumalainen, Miika (1482) | Lost 0-0 | -181464 |
| 7sealed | 133 | Kuusniemi, Tuomas (1465) | Lost 1-2 | -181446 |
| average opponent: 1482record: 2-5 | new rating: 1446 | |||