Hosoi, Kazuo
Current rating: 1407
Record: 1-6
| Grand Prix Niigata 2005 (Kamigawa block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 23 | Ooshima, Kunihiro (1425) | Lost 0-2 | -191481 |
| 2block | 183 | Watanabe, Taiga (1516) | Lost 1-2 | -181463 |
| 3block | 185 | Tanabe, Kazuya (1317) | Lost 1-2 | -201443 |
| 4block | 219 | Saito, Kunihiro (1463) | Won 2-1 | +181461 |
| 5block | 201 | Hanyu, Yusuke (1466) | Lost 1-2 | -181443 |
| 6block | 178 | Yoshino, Takeaki (1445) | Lost 1-2 | -181425 |
| 7block | 149 | Fujii, Yuuki (1428) | Lost 1-2 | -181407 |
| average opponent: 1437record: 1-6 | new rating: 1407 | |||