Oshima, Hideaki
Current rating: 1397
Record: 1-7-1
| Grand Prix Yokohama 2004 (COK limited) | starting rating: 1426 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 162 | Shima, Junichirou (1601) | Draw 1-1 | +41430 |
| 2sealed | 188 | Ogura, Shigeru (1429) | Won 2-0 | +181448 |
| 3sealed | 116 | Fujita, Kouki (1464) | Lost 0-2 | -181430 |
| 4sealed | 212 | Katou, Masanari (1541) | Lost 1-2 | -161414 |
| 5sealed | 221 | Murasawa, Yuuya (1482) | Lost 0-2 | -171397 |
| average opponent: 1503record: 1-3-1 | new rating: 1397 | |||
| Grand Prix Utsunomiya 2002 (ONS rochester) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 223 | Sugimori, Kazutaka (1500) | Lost 1-2 | -181482 |
| 2sealed | 206 | Katsuda, Hiroshi (1392) | Lost 0-2 | -201462 |
| 3sealed | 285 | Ito, Takahiro(Yokohama) (1463) | Lost 0-2 | -181444 |
| 4sealed | 290 | Kotani, Satoshi (1445) | Lost 0-2 | -181426 |
| average opponent: 1450record: 0-4 | new rating: 1426 | |||