Oka, Hiroyasu
Current rating: 1443
Record: 2-5
| Grand Prix Okayama 2004 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 110 | Hasegawa, Suguru (1500) | Lost 1-2 | -181482 |
| 2extended | 136 | Suzuki, Yoshihiro (1477) | Lost 0-2 | -181464 |
| 3extended | 163 | Sasaki, Takeshi (1454) | Lost 0-2 | -181446 |
| 4extended | 182 | Kamei, Toru (1300) | Lost 1-2 | -211425 |
| 5extended | 173 | Sato, Yuuki (1424) | Lost 1-2 | -181407 |
| 6extended | 155 | Arakane, Daisuke (1392) | Won 2-1 | +181425 |
| 8extended | 106 | Kawabata, Masanori (1442) | Won 2-1 | +181443 |
| average opponent: 1427record: 2-5 | new rating: 1443 | |||