Kobayasi, Yosihisa
Current rating: 1499
Record: 4-4
| Grand Prix Okayama 2004 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 5 | Suzuki, Yoshihiro (1495) | Won 2-0 | +181518 |
| 2extended | 12 | Nakaoka, Shinya (1472) | Lost 0-2 | -191499 |
| 3extended | 141 | Obayashi, Naoki (1414) | Lost 0-2 | -191480 |
| 4extended | 168 | Akita, Naoto (1472) | Won 2-1 | +171497 |
| 5extended | 134 | Sai, Chee-kin (1483) | Won 2-0 | +181515 |
| 6extended | 82 | Satou, Kiminori (1518) | Lost 1-2 | -181497 |
| 7extended | 100 | Nakauchi, Mayumi (1540) | Won 2-1 | +191516 |
| 8extended | 75 | Matsui, Hisataka (1565) | Lost 1-2 | -171499 |
| average opponent: 1495record: 4-4 | new rating: 1499 | |||