Katsumata, Yuuma
Current rating: 1345
Record: 2-11-2
| Grand Prix Yokohama 2004 (COK limited) | starting rating: 1429 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 51 | Yasuda, Masahiro (1446) | Lost 1-2 | -171412 |
| 2sealed | 244 | Murasawa, Yuuya (1483) | Draw 1-1 | +11413 |
| 3sealed | 268 | Kiyota, Takeshi (1481) | Lost 1-2 | -171396 |
| 4sealed | 283 | Ogura, Shigeru (1393) | Lost 0-2 | -181378 |
| 5sealed | 244 | Tsunokawa, Yoshikazu (1344) | Won 2-1 | +181396 |
| 6sealed | 196 | Takahira, Wataru (1373) | Lost 0-2 | -191377 |
| 7sealed | 163 | Ito, Yuuko (1458) | Lost 1-2 | -161361 |
| 8sealed | 35 | Isomoto, Hirofumi (1496) | Lost 0-2 | -161345 |
| average opponent: 1434record: 1-6-1 | new rating: 1345 | |||
| Grand Prix Shizuoka 2003 (MRD limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 197 | Matsumoto, Hiroshi (1520) | Lost 1-2 | -181482 |
| 2sealed | 203 | Samiso, Yutaka (1483) | Won 2-1 | +181500 |
| 3sealed | 224 | Yoshikuni, Mitsuyuki (1479) | Lost 1-2 | -181482 |
| 4sealed | 212 | Kasuga, Shohei (1451) | Draw 1-1 | -11481 |
| 5sealed | 212 | Yoshikawa, Hiroshi (1546) | Lost 0-2 | -161465 |
| 6sealed | 190 | Kotajima, Yasuhiro (1513) | Lost 0-2 | -181447 |
| 7sealed | 159 | Tanaka, Yosuke (1447) | Lost 1-2 | -181429 |
| average opponent: 1491record: 1-5-1 | new rating: 1429 | |||