Oosawa, Yousuke
Current rating: 1467
Record: 2-4
| Grand Prix Niigata 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 20 | Taura, Ryuji (1492) | Won 2-1 | +181518 |
| 2sealed | 24 | Satou, Dai (1609) | Lost 1-2 | -161502 |
| 3sealed | 156 | Usami, Taro (1685) | Lost 0-2 | -151487 |
| 4sealed | 291 | Yagita, Masato (1481) | Lost 0-2 | -181469 |
| 5sealed | 252 | Tatsuhara, Satoshi (1388) | Lost 1-2 | -201449 |
| 6sealed | 226 | Yoshikawa, Takahiro (1427) | Won 2-0 | +181467 |
| average opponent: 1514record: 2-4 | new rating: 1467 | |||