Matsumoto, Hirotoshi
Current rating: 1453
| Grand Prix Yokohama 2004 (COK limited) | starting rating: 1488 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 154 | Yanada, Kenji (1467) | Lost 1-2 | -191469 |
| 2sealed | 208 | Sekine, Takeshi (1584) | Lost 0-2 | -161453 |
| top | average opponent: 1525record: 0-2 | new rating: 1453 | ||
| Grand Prix Sendai 2004 (DST limited) | starting rating: 1480 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2 | Kishida, Hirokazu (1443) | Won 2-0 | +181498 |
| 2sealed | 38 | Tomita, Shuntarou (1500) | Won 2-0 | +181516 |
| 3sealed | 48 | Ino, Kentaro (1605) | Won 2-1 | +191535 |
| 4sealed | 41 | Ishii, Hayato (1620) | Won 2-1 | +201555 |
| 5sealed | 25 | Yamamoto, Kentaro (1656) | Lost 0-2 | -161539 |
| 6sealed | 61 | Shoji, Tatsuro (1533) | Lost 0-2 | -181521 |
| 7sealed | 84 | Sakurada, Kouichi (1612) | Lost 0-2 | -171504 |
| 8sealed | 82 | Ogura, Ryou (1569) | Lost 0-2 | -161488 |
| top | average opponent: 1567record: 4-4 | new rating: 1488 | ||
| Grand Prix Yokohama 2003 (Onslaught block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 190 | Asakura, Takumi (1500) | Draw 1-1 | 01500 |
| 2block | 227 | Fujie, Kouji (1451) | Draw 1-1 | -11499 |
| 3block | 324 | Masuno, Ryosuke (1481) | Draw 1-1 | 01499 |
| 4block | 318 | Suzuki, Kazuaki (1482) | Lost 0-1 | -191480 |
| top | average opponent: 1479record: 0-1-3 | new rating: 1480 | ||