Miyakoshi, Hiroyasu
Current rating: 1477
Record: 1-2
| Grand Prix Niigata 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 191 | Hayashi, Masataka (1445) | Won 2-0 | +171517 |
| 2sealed | 157 | Yamada, Tsutomu (1405) | Lost 1-2 | -201497 |
| 3sealed | 151 | Hanawa, Atsushi (1376) | Lost 0-2 | -201477 |
| average opponent: 1408record: 1-2 | new rating: 1477 | |||