Katayama, Ryuichi
Current rating: 1583
Record: 11-7
| Grand Prix Shizuoka 2018 (legacy) (legacy) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 82 | Yamashita, Hiroaki (1500) | Won 2-1 | +191500 |
| 2legacy | 314 | Sakagami, Taichi (1408) | Won 2-0 | +161516 |
| 3legacy | 235 | Fujino, Masashi (1571) | Won 2-0 | +191535 |
| 4legacy | 93 | Yamagishi, Hideaki (1498) | Lost 1-2 | -191516 |
| 5legacy | 222 | Tsuboyama, Shuta (1489) | Won 2-0 | +181534 |
| 6legacy | 65 | Saitou, Shintaro (1635) | Won 2-1 | +201554 |
| 7legacy | 59 | Baba, Takashi (1580) | Won 2-1 | +181572 |
| 8legacy | 58 | Tanikawa, Hironori (1644) | Won 2-0 | +191591 |
| 9legacy | 25 | Arita, Kouichirou (1675) | Won 2-1 | +201611 |
| 10legacy | 11 | Tsukamoto, Mitsuru (1823) | Lost 1-2 | -141597 |
| 11legacy | 42 | Sonoda, Naohiro (1690) | Won 2-0 | +191616 |
| 12legacy | 29 | Huang, Tachi (1717) | Lost 1-2 | -161600 |
| 13legacy | 42 | Watanabe, Shouichi (1600) | Lost 0-2 | -181582 |
| 14legacy | 51 | Torii, Motonori (1566) | Lost 1-2 | -181564 |
| 15legacy | 66 | Uechi, Shintaro (1627) | Won 2-1 | +191583 |
| average opponent: 1601record: 10-5 | new rating: 1583 | |||
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 963 | Hamada, Takahiro (1459) | Lost 0-2 | -191481 |
| 2sealed | 1083 | Katsumata, Kosuke (1479) | Lost 1-2 | -181463 |
| 3sealed | 1082 | Yahara, Shotaro (1464) | Won 2-0 | +181481 |
| average opponent: 1467record: 1-2 | new rating: 1481 | |||