Hamamoto, Atsushi
Current rating: 1445
Record: 1-4
| Grand Prix Hiroshima 2003 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 8 | Nakamura, Kousuke (1466) | Won 2-0 | +171517 |
| 2extended | 94 | Kojima, Yoshimasa (1500) | Lost 0-2 | -181499 |
| 3extended | 79 | Nakamura, Hirobumi (1499) | Lost 0-2 | -181481 |
| 4extended | 147 | Tsai, Chih-Chun (1481) | Lost 1-2 | -181463 |
| 5extended | 170 | Ishida, Naoyuki (1446) | Lost 0-2 | -181445 |
| average opponent: 1478record: 1-4 | new rating: 1445 | |||