Matsumoto, Ishiro
Current rating: 1482
Record: 2-3
| Grand Prix Okayama 2008 (ALA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 143 | Shirasaka, Shingo (1500) | Won 0-0 | +181518 |
| 2sealed | 23 | Iwasawa, Fumiya (1516) | Lost 1-2 | -181500 |
| 3sealed | 170 | Higashi, Kentarou (1500) | Lost 1-2 | -181482 |
| 4sealed | 216 | Ariyoshi, Daisuke (1486) | Won 2-0 | +181500 |
| 5sealed | 192 | Yoshimura, Yuuki (1498) | Lost 0-2 | -181482 |
| average opponent: 1500record: 2-3 | new rating: 1482 | |||