Mannikko, Petteri
Current rating: 1504
Record: 3-3
| Grand Prix Helsinki 2004 (COK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 157 | Hyrkko, Kari (1500) | Won 2-0 | +181518 |
| 2sealed | 89 | Holtin, Benjamin (1605) | Lost 0-2 | -161502 |
| 3sealed | 130 | Pihkala, Eino (1500) | Lost 1-2 | -181484 |
| 4sealed | 174 | Virri, Esko (1481) | Won 2-1 | +181502 |
| 5sealed | 118 | Lamsa, Esko (1500) | Won 2-0 | +171519 |
| 6sealed | 115 | Joebstl, Markus (1680) | Lost 0-2 | -151504 |
| average opponent: 1544record: 3-3 | new rating: 1504 | |||