Shiraga, Motoaki
Current rating: 1374
| Grand Prix Kobe 2009 (extended) | starting rating: 1376 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 158 | Ooi, Hidenori (1500) | Lost 1-2 | -151361 |
| 2extended | 152 | Fujimoto, Takehiro (1516) | Won 2-1 | +201381 |
| 3extended | 190 | Ohno, Isao (1627) | Won 2-0 | +231404 |
| 4extended | 125 | Nakamura, Atsushi (1448) | Lost 1-2 | -171387 |
| 5extended | 164 | Kawakami, Hiroshi (1660) | Lost 0-2 | -131374 |
| top | average opponent: 1550record: 2-3 | new rating: 1374 | ||
| Grand Prix Okayama 2008 (ALA limited) | starting rating: 1410 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 204 | Taniguchi, Hiroaki (1470) | Lost 0-0 | -171393 |
| 2sealed | 249 | mizuta, yuki (1482) | Lost 1-2 | -171376 |
| top | average opponent: 1476record: 0-2 | new rating: 1376 | ||
| Grand Prix Okayama 2004 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 46 | Okabe, Kazuyuki (1500) | Lost 0-2 | -181482 |
| 2extended | 115 | Teramoto, Shoji (1476) | Lost 0-2 | -181464 |
| 3extended | 174 | Ikedo, Masakazu (1515) | Lost 0-2 | -171447 |
| 4extended | 189 | Itadani, Akira (1444) | Lost 0-2 | -181429 |
| 5extended | 174 | Ichikawa, Yohei (1369) | Lost 1-2 | -191410 |
| top | average opponent: 1461record: 0-5 | new rating: 1410 | ||