Koyama, Yuriko
Current rating: 1448
Record: 1-4
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 302 | Hurukawa, Yuta (1445) | Lost 1-2 | -191481 |
| 2pioneer | 401 | Seike, Makoto (1566) | Lost 0-2 | -161465 |
| 3pioneer | 744 | Cervantes, Clayton (1471) | Lost 1-2 | -181447 |
| 4pioneer | 772 | Yamamoto, Takatoyo (1504) | Won 2-1 | +191466 |
| 5pioneer | 714 | Masuda, Shinichiro (1458) | Lost 1-2 | -181448 |
| average opponent: 1489record: 1-4 | new rating: 1448 | |||