Okumoto, Kenta
Current rating: 1417
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1434 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 253 | Nakamura, Akiteru (1500) | Lost 0-2 | -171417 |
| top | record: 0-1 | new rating: 1417 | ||
| Grand Prix Hong Kong 2015 (ORI limited) | starting rating: 1445 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 5 | Qiu, Shi (1571) | Lost 0-2 | -161429 |
| 2sealed | 278 | Jeon, Doo Young (1469) | Won 2-0 | +191448 |
| 3sealed | 343 | Belgeria, Erwin (1498) | Won 2-0 | +191467 |
| 4sealed | 269 | Cheung, Kar Kit Jonath (1518) | Lost 1-2 | -171450 |
| 5sealed | 56 | Notake, Shozaburo (1587) | Lost 0-2 | -161434 |
| top | average opponent: 1528record: 2-3 | new rating: 1434 | ||
| Grand Prix Shizuoka 2015 (KTK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 111 | Fujitani, Masahiro (1500) | Lost 1-2 | -181482 |
| 2sealed | 349 | Takahashi, Akira1243 (1484) | Lost 0-2 | -181464 |
| 3sealed | 512 | Saitou, Hokuto (1396) | Lost 0-2 | -191445 |
| top | average opponent: 1460record: 0-3 | new rating: 1445 | ||