Kamanaka, Yuuhei
Current rating: 1400
| Grand Prix Yokohama 2010 (extended) | starting rating: 1417 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 429 | Osumi, Keigo (1490) | Lost 0-2 | -171400 |
| top | record: 0-1 | new rating: 1400 | ||
| Grand Prix Niigata 2009 (M10 limited) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 142 | Hanawa, Atsushi (1373) | Lost 0-2 | -201446 |
| 2sealed | 293 | Sasaki, Yusuke (1629) | Lost 1-2 | -141432 |
| 3sealed | 303 | Ogura, Shigeru (1390) | Won 2-0 | +171449 |
| 4sealed | 238 | Sone, Issei (1483) | Won 2-1 | +181467 |
| 5sealed | 169 | Kozakai, Yukio (1489) | Lost 1-2 | -171450 |
| 6sealed | 210 | Takahashi, Teo (1480) | Won 2-1 | +181468 |
| 7sealed | 171 | Ogawa, Kazuki (1522) | Lost 0-2 | -171451 |
| 8sealed | 138 | Fukumoto, Tsuyoshi (1482) | Lost 0-2 | -171434 |
| 9sealed | 111 | Tanaka, Kazuhiko (1469) | Lost 0-2 | -171417 |
| top | average opponent: 1479record: 3-6 | new rating: 1417 | ||
| Grand Prix Kyoto 2007 (PLC standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 139 | Imagawa, Hiromasa (1571) | Won 2-1 | +191519 |
| 2standard | 113 | Ikushima, Yasuyuki (1497) | Won 2-1 | +181537 |
| 3standard | 21 | Tabata, Hiroshi (1535) | Lost 0-2 | -181519 |
| 4standard | 244 | Ueda, Shigeki (1458) | Lost 0-2 | -191500 |
| 5standard | 283 | Nakamura, Keisuke (1671) | Lost 0-2 | -151485 |
| 6standard | 286 | Mizuno, Shinsuke (1437) | Lost 1-2 | -191466 |
| top | average opponent: 1528record: 2-4 | new rating: 1466 | ||