Yamamoto, Hirohito
Current rating: 1470
Record: 3-5
| Grand Prix Shizuoka 2015 (KTK limited) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 284 | Mukai, Shinichi (1420) | Won 2-0 | +171501 |
| 2sealed | 191 | Furukawa, Hiroki (1665) | Lost 1-2 | -151486 |
| 3sealed | 320 | Senshuu, Yoshinori (1448) | Won 2-1 | +171503 |
| 4sealed | 126 | Yoshizumi, Tomohiro (1534) | Lost 0-2 | -171486 |
| 5sealed | 272 | Takehana, Yuki (1589) | Lost 1-2 | -161470 |
| average opponent: 1531record: 2-3 | new rating: 1470 | |||
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 396 | Kurimori, Yuuta (1621) | Lost 0-2 | -161484 |
| 3sealed | 208 | Naono, Shuichi (1475) | Won 2-0 | +181502 |
| 4sealed | 180 | Sakurai, Wataru (1505) | Lost 1-2 | -181484 |
| average opponent: 1534record: 1-2 | new rating: 1484 | |||