Katou, Ryou
Current rating: 1450
Record: 3-6
| Grand Prix Yokohama 2019 (modern) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 62 | Kometani, Yuki (1661) | Lost 0-2 | -151467 |
| 4modern | 387 | Kitajima, Ryoko (1465) | Lost 0-2 | -181449 |
| 5modern | 692 | Okano, Yukimasa (1571) | Won 2-0 | +201469 |
| 6modern | 382 | Nakajima, Shunichi (1417) | Lost 1-2 | -191450 |
| average opponent: 1528record: 1-3 | new rating: 1450 | |||
| Grand Prix Kobe 2017 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 293 | Arisue, Kei (1372) | Won 2-1 | +161516 |
| 2modern | 47 | Ozawa, Masashi (1515) | Lost 0-2 | -181498 |
| 3modern | 912 | Katayama, Yoshimi (1487) | Won 2-0 | +171515 |
| 4modern | 602 | Ogawa, Masafumi (1656) | Lost 0-2 | -151500 |
| 5modern | 987 | Ishikawa, Hikaru (1500) | Lost 1-2 | -181482 |
| average opponent: 1506record: 2-3 | new rating: 1482 | |||