Sone, Issei
Current rating: 1425
Record: 1-5
| Grand Prix Niigata 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 246 | Sawada, Rui (1499) | Won 2-1 | +181518 |
| 2sealed | 87 | Fleury, Aaron (1555) | Lost 1-2 | -171501 |
| 3sealed | 240 | Imai, Yuuki (1500) | Lost 0-2 | -181483 |
| 4sealed | 238 | Kamanaka, Yuuhei (1449) | Lost 1-2 | -191464 |
| 5sealed | 264 | Narumiya, Ryuuma (1314) | Lost 1-2 | -211443 |
| 6sealed | 225 | Nishiwaki, Yousuke (1403) | Lost 1-2 | -181425 |
| average opponent: 1453record: 1-5 | new rating: 1425 | |||