Koistinen, Tommi
Current rating: 1485
Record: 2-3
| Grand Prix Helsinki 2004 (COK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 97 | Makela, Janne (1500) | Won 2-1 | +181518 |
| 2sealed | 59 | Vallivaara, Ilari (1531) | Won 2-1 | +181536 |
| 3sealed | 43 | Harkonen, Jarno (1636) | Lost 0-2 | -161520 |
| 4sealed | 86 | Sovela, Jouni (1519) | Lost 1-2 | -181502 |
| 5sealed | 146 | Salminen, Aki (1535) | Lost 0-2 | -171485 |
| average opponent: 1544record: 2-3 | new rating: 1485 | |||