Sibata, Masaki
Current rating: 1458
Record: 6-9
| Grand Prix Nagoya 2004 (5DN standard) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 21 | Takeda, Hiroki (1601) | Lost 1-2 | -161450 |
| 2standard | 342 | Mita, Yoshihito (1482) | Won 2-1 | +191469 |
| 3standard | 188 | Nakashima, Toshihiko (1468) | Won 2-1 | +181487 |
| 4standard | 170 | Yaoita, Akihiro (1621) | Won 2-1 | +201507 |
| 5standard | 147 | Sawada, Ken (1487) | Lost 0-2 | -181489 |
| 6standard | 144 | Yasufuku, Akihiro (1548) | Lost 0-2 | -171472 |
| 7standard | 264 | Tada, Hidenobu (1501) | Lost 0-2 | -171455 |
| 8standard | 235 | Yamada, Takashi (1478) | Won 2-1 | +181473 |
| 9standard | 159 | Harada, Satoshi (1661) | Lost 0-2 | -151458 |
| average opponent: 1539record: 4-5 | new rating: 1458 | |||
| Grand Prix Okayama 2004 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 89 | Hiraoka, Toshiaki (1571) | Lost 0-2 | -171483 |
| 2extended | 148 | Syouyama, Youhei (1507) | Lost 1-2 | -171466 |
| 3extended | 171 | Suginaka, Toshio (1504) | Won 2-1 | +181484 |
| 4extended | 152 | Tanimoto, Tatsuro (1452) | Lost 0-2 | -181466 |
| 5extended | 163 | Mukumoto, Akihiro (1464) | Won 2-0 | +181484 |
| 6extended | 138 | Okabe, Tomoaki (1486) | Lost 0-2 | -181466 |
| average opponent: 1497record: 2-4 | new rating: 1466 | |||