Tabata, Koichi
Current rating: 1527
Record: 4-3
| Grand Prix Niigata 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 7 | Aryabhima, Rahman (1500) | Won 2-1 | +181518 |
| 2sealed | 49 | Hishida, Akinori (1519) | Won 2-1 | +181536 |
| 3sealed | 99 | Tanahashi, Masayasu (1924) | Lost 1-2 | -111525 |
| 4sealed | 192 | Murase, Hiroshi (1581) | Won 2-0 | +191544 |
| 5sealed | 136 | Yao, Shunsuke (1547) | Won 2-0 | +181562 |
| 6sealed | 32 | Sasaki, Yuuta (1629) | Lost 0-2 | -171545 |
| 7sealed | 131 | Sasaki, Tsuyoshi (1519) | Lost 1-2 | -181527 |
| average opponent: 1603record: 4-3 | new rating: 1527 | |||