Iwasaki, Yoshitaka
Current rating: 1448
| Grand Prix Hiroshima 2003 (extended) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 66 | Kobayashi, Shigenori (1485) | Lost 0-2 | -181464 |
| 3extended | 100 | Sawamura, Kazutaka (1498) | Lost 1-2 | -171447 |
| 4extended | 170 | Nagahara, Tatsuya (1481) | Lost 1-2 | -181429 |
| 5extended | 166 | Masamura, Ayumu (1452) | Won 2-1 | +191448 |
| top | average opponent: 1479record: 1-3 | new rating: 1448 | ||
| Grand Prix Utsunomiya 2002 (ONS rochester) | starting rating: 1519 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 28 | Nishio, Tomomi (1500) | Won 2-0 | +171536 |
| 2sealed | 128 | Saito, Takanobu (1515) | Lost 1-2 | -181518 |
| 3sealed | 240 | Satou, Daisuke (1499) | Lost 1-2 | -181500 |
| 4sealed | 216 | Fujita, Gensho (1531) | Lost 1-2 | -181482 |
| top | average opponent: 1511record: 1-3 | new rating: 1482 | ||
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 350 | Kawasaki, Daisuke (1500) | Draw 1-1 | 01500 |
| 3block | 242 | Miyazaki, Naoki (1518) | Lost 1-2 | -181482 |
| 4block | 401 | Nishiyama, Toshimasa (1500) | Won 2-0 | +191501 |
| 5block | 273 | Matsuda, Issui (1517) | Draw 1-1 | 01501 |
| 6block | 364 | Nishimura, Tomoya (1468) | Won 2-1 | +171518 |
| 7block | 251 | Yamazaki, Takahiro (1517) | Lost 0-2 | -181500 |
| 8block | 256 | Nagano, Shinichi (1518) | Won 2-0 | +191519 |
| top | average opponent: 1505record: 3-2-2 | new rating: 1519 | ||