Iwaki, Hisatomo
Current rating: 1416
| Grand Prix Okayama 2008 (ALA limited) | starting rating: 1448 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 141 | Hashiba, Daiki (1522) | Lost 0-0 | -161432 |
| 2sealed | 240 | Tagawa, Takashi (1526) | Lost 1-2 | -161416 |
| top | average opponent: 1524record: 0-2 | new rating: 1416 | ||
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 3block | 162 | Ikeuchi, Kauzhiro (1500) | Lost 1-2 | -181483 |
| 4block | 344 | Kurobane, Kyuuya (1518) | Lost 1-2 | -171466 |
| 5block | 298 | Fujita, Sho (1518) | Lost 0-2 | -181448 |
| top | average opponent: 1512record: 0-3 | new rating: 1448 | ||
| Grand Prix Hiroshima 2001 (INV limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 126 | Inami, Kazuyuki (1500) | Won 2-0 | +181518 |
| 2sealed | 73 | Nonaka, Ryota (1518) | Won 2-1 | +181536 |
| 3sealed | 50 | Houwa, Osamu (1485) | Lost 0-2 | -191517 |
| 4sealed | 106 | Tsukamoto, Takashi (1518) | Won 2-1 | +181535 |
| 5sealed | 62 | Hirakawa, Akito (1534) | Lost 1-2 | -181517 |
| 6sealed | 96 | Kageyama, Tarou (1618) | Lost 1-2 | -161501 |
| top | average opponent: 1529record: 3-3 | new rating: 1501 | ||