Kumage, Isao
Current rating: 1427
Record: 2-6
| Grand Prix Hiroshima 2003 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 80 | Kawai, Katsuya (1515) | Lost 0-2 | -181482 |
| 2extended | 120 | Tanimoto, Tatsuro (1444) | Lost 0-2 | -181464 |
| 3extended | 168 | Kajiyama, Yoshiyuki (1413) | Lost 0-2 | -191445 |
| 4extended | 189 | Furukawa, Takayuki 4089 (1445) | Lost 1-2 | -181427 |
| 5extended | 180 | Kawamoto, Daisuke (1426) | Lost 1-2 | -181409 |
| 6extended | 158 | Miyake, Takaaki (1407) | Won 2-1 | +181427 |
| 7extended | 130 | Tsumagari, Hideya (1410) | Won 2-1 | +171444 |
| 8extended | 102 | Takahama, Norimasa (1463) | Lost 0-2 | -171427 |
| average opponent: 1441record: 2-6 | new rating: 1427 | |||