Kumazawa, Futa
Current rating: 1453
Record: 4-7
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1510 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 362 | Kikuchi, Kota (1411) | Lost 1-2 | -201490 |
| 2pioneer | 541 | Kato, Atushi (1499) | Lost 0-2 | -181472 |
| 3pioneer | 804 | Takaki, Kengo (1427) | Lost 0-2 | -191453 |
| average opponent: 1445record: 0-3 | new rating: 1453 | |||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 335 | Tsuruta, Yoshiaki (1432) | Lost 0-2 | -191481 |
| 2standard | 753 | Naganawa, Satoshi (1470) | Lost 1-2 | -181463 |
| 3standard | 1102 | Fujita, Kenichi (1639) | Won 2-1 | +211484 |
| 4standard | 931 | Miyazaki, Kento (1479) | Won 2-1 | +181502 |
| 5standard | 731 | Choi, Jae-Joon (1756) | Won 2-1 | +221524 |
| 6standard | 692 | Taniguchi, Yuusuke (1559) | Won 2-0 | +191543 |
| 7standard | 483 | Zhang, Hongqiang (1644) | Lost 0-2 | -161527 |
| 8standard | 599 | Sasaki, Tsutomu (1576) | Lost 1-2 | -171510 |
| average opponent: 1569record: 4-4 | new rating: 1510 | |||