Marttila, Lauri
Current rating: 1499
Record: 4-4
| Grand Prix Helsinki 2004 (COK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 53 | Marcotte, Herve (1464) | Lost 0-2 | -191481 |
| 2sealed | 120 | Hietanen, Ari (1482) | Won 2-0 | +181499 |
| 3sealed | 81 | Stenlund, Rikard (1489) | Lost 0-2 | -181481 |
| 4sealed | 160 | Hanninen, Kari (1482) | Won 2-1 | +181499 |
| 5sealed | 140 | Ahtiainen, Esa (1470) | Lost 0-2 | -181481 |
| 6sealed | 134 | Kupias, Petri (1483) | Lost 1-2 | -181463 |
| 7sealed | 126 | Berezovsky, Yaroslav (1482) | Won 2-0 | +181481 |
| 8sealed | 107 | Saari, Antero (1482) | Won 2-1 | +181499 |
| average opponent: 1479record: 4-4 | new rating: 1499 | |||