Wakamatu, Isao
Current rating: 1480
Record: 2-3
| Grand Prix Yokohama 2003 (Onslaught block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 79 | Fujihira, Keizou (1491) | Lost 1-2 | -181482 |
| 2block | 233 | Aizawa, Keiji (1482) | Won 2-0 | +181500 |
| 3block | 274 | Kitagawa, Tomoaki (1497) | Won 2-0 | +181518 |
| 4block | 242 | Miyaoi, Tomoyuki (1517) | Lost 1-2 | -181500 |
| 5block | 290 | Wada, Yuta (1400) | Lost 0-2 | -201480 |
| average opponent: 1477record: 2-3 | new rating: 1480 | |||