Katayama, Tatuaki
Current rating: 1479
Record: 7-8
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1498 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1322 | Ando, Masanori1191 (1500) | Won 2-0 | +181516 |
| 2sealed | 1150 | Kumagai, Yohei (1518) | Lost 1-2 | -181498 |
| 3sealed | 1187 | Watanabe, Yasuyuki (1473) | Lost 0-2 | -191479 |
| 4sealed | 1166 | Fukushima, Yuuhei (1478) | Lost 0-2 | -181461 |
| 5sealed | 1220 | Sato, Gaku (1471) | Lost 1-2 | -181443 |
| 6sealed | 1159 | Satou, Kengo (1426) | Won 2-0 | +181461 |
| 7sealed | 1087 | Hideaki, Enomoto (1432) | Won 2-0 | +181479 |
| average opponent: 1471record: 3-4 | new rating: 1479 | |||
| Grand Prix Kyoto 2015 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 150 | Nakae, Hirotaka (1462) | Won 2-1 | +171517 |
| 2legacy | 1 | Hayata, Akira (1495) | Lost 0-2 | -181499 |
| 3legacy | 377 | Tsuchiya, Yoshihiro (1307) | Won 2-0 | +141513 |
| 4legacy | 272 | Okano, Toshiya (1564) | Lost 0-2 | -171496 |
| 5legacy | 234 | Ishibashi, Takuya (1450) | Won 2-1 | +181514 |
| 6legacy | 209 | Arase, Kousuke (1520) | Won 2-0 | +181532 |
| 7legacy | 102 | Yamashita, Taiki (1530) | Lost 0-2 | -181514 |
| 8legacy | 188 | Boehner, Brent (1629) | Lost 0-2 | -161498 |
| average opponent: 1495record: 4-4 | new rating: 1498 | |||