Ishii, Takumi
Current rating: 1422
| Grand Prix Shizuoka 2015 (KTK limited) | starting rating: 1432 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 310 | Tsuruta, Yoshiaki (1500) | Won 2-0 | +191451 |
| 2sealed | 149 | Kidera, Seita (1587) | Lost 0-2 | -161435 |
| 3sealed | 245 | Okamoto, Yoshihiko (1561) | Won 2-1 | +211456 |
| 4sealed | 284 | Yamagami, Yudai (1498) | Lost 1-2 | -171439 |
| 5sealed | 251 | Kunihiro, Mizuho (1499) | Lost 1-2 | -171422 |
| top | average opponent: 1529record: 2-3 | new rating: 1422 | ||
| Grand Prix Shizuoka 2008 (MOR standard) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 160 | Sogabe, Ippei (1665) | Lost 1-2 | -151467 |
| 2standard | 311 | Ishikawa, Shou (1481) | Lost 1-2 | -181449 |
| 3standard | 320 | Kubota, Takuya (1464) | Lost 1-2 | -171432 |
| top | average opponent: 1537record: 0-3 | new rating: 1432 | ||
| Grand Prix Yokohama 2004 (COK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 246 | Kurosaki, Daiju (1500) | Lost 1-2 | -181482 |
| 2sealed | 265 | Inanaga, Nobuyuki (1495) | Lost 1-2 | -181464 |
| 3sealed | 289 | Shimeno, Yu (1445) | Won 2-1 | +181482 |
| top | average opponent: 1480record: 1-2 | new rating: 1482 | ||