Tamachi, Tomoya
Current rating: 1465
Record: 3-5
| Grand Prix Yokohama 2003 (Onslaught block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 118 | Shiota, Fumihiko (1500) | Won 2-1 | +181518 |
| 2block | 93 | Kajiyama, Ryuta (1518) | Lost 0-2 | -181500 |
| 3block | 176 | Yamada, Tsutomu (1699) | Lost 1-2 | -141486 |
| 4block | 296 | Arakane, Daisuke (1481) | Lost 0-2 | -181468 |
| 5block | 354 | Kawaguchi, Youhei (1464) | Lost 1-2 | -191449 |
| 6block | 321 | Saito, Yoshihide (1372) | Won 2-0 | +171466 |
| 7block | 272 | Tanabe, Kazuya (1398) | Won 2-1 | +171483 |
| 8block | 221 | Imaizumi, Hirofumi (1479) | Lost 1-2 | -181465 |
| average opponent: 1489record: 3-5 | new rating: 1465 | |||