Hamasuna, Toshitaka
Current rating: 1445
Record: 2-5
| Grand Prix Yokohama 2003 (Onslaught block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 200 | Uchida, Takuya (1587) | Lost 1-2 | -161484 |
| 3block | 257 | Shibayama, Jun (1519) | Won 2-1 | +181502 |
| 4block | 148 | Mito, Takehiro (1500) | Lost 0-2 | -181484 |
| 5block | 208 | Tezuka, Yuuki (1352) | Lost 0-2 | -201464 |
| 6block | 265 | Tani, Tokuo (1356) | Won 2-1 | +161480 |
| 7block | 196 | Yamanaka, Akinori (1501) | Lost 0-2 | -181462 |
| 8block | 227 | Tamura, Daichi (1503) | Lost 1-2 | -171445 |
| average opponent: 1474record: 2-5 | new rating: 1445 | |||