Hamanaka, Keita
Current rating: 1392
| Grand Prix Kobe 2012 (DKA limited) | starting rating: 1415 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 122 | Sakai, Toshio (1500) | Won 2-1 | +201435 |
| 2sealed | 152 | Hayata, Akira (1538) | Won 2-1 | +201455 |
| 3sealed | 191 | Tanaka, Daiki (1481) | Lost 1-2 | -181437 |
| 4sealed | 240 | Suzuki, Kazushige (1529) | Lost 0-2 | -161421 |
| 5sealed | 263 | Kubouchi, Hayato (1495) | Won 2-0 | +191440 |
| 6sealed | 239 | Hama, Takayuki (1562) | Lost 0-2 | -161424 |
| 7sealed | 255 | Urasaki, Takayuki (1549) | Lost 1-2 | -151409 |
| 8sealed | 252 | Narumiya, Ryuuma (1508) | Lost 1-2 | -171392 |
| top | average opponent: 1520record: 3-5 | new rating: 1392 | ||
| Grand Prix Kobe 2011 (extended) | starting rating: 1431 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 65 | Ota, Keisuke (1553) | Lost 0-2 | -161415 |
| top | record: 0-1 | new rating: 1415 | ||
| Grand Prix Sendai 2010 (ROE standard) | starting rating: 1445 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 157 | Ogawa, Masahiro (1465) | Won 2-1 | +191464 |
| 2standard | 144 | Kusaka, Kenji (1517) | Lost 0-2 | -171447 |
| 3standard | 192 | Muranaka, Hiroya (1550) | Won 2-1 | +201467 |
| 4standard | 139 | Nishiwaki, Yousuke (1430) | Lost 0-2 | -191448 |
| 5standard | 237 | Mashima, Mitsuharu (1502) | Lost 1-2 | -171431 |
| top | average opponent: 1493record: 2-3 | new rating: 1431 | ||
| Grand Prix Yokohama 2010 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 86 | Ishii, Ryouta (1500) | Lost 0-2 | -181482 |
| 2extended | 359 | Tatsuno, Masanori (1482) | Lost 0-2 | -181464 |
| 3extended | 473 | Shirasaka, Shingo (1429) | Lost 1-2 | -191445 |
| top | average opponent: 1470record: 0-3 | new rating: 1445 | ||