Doyama, Hayate
Current rating: 1465
Record: 4-6
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1480 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 591 | Suzuki, Honami (1500) | Won 2-0 | +191499 |
| 2sealed | 223 | Ishizaki, Hiroshi (1516) | Lost 0-2 | -181481 |
| 3sealed | 898 | Shirato, Yutaro (1430) | Lost 0-2 | -191462 |
| 4sealed | 902 | Shimokobe, Yukihiro (1481) | Lost 1-2 | -181444 |
| 5sealed | 869 | Suzuki, Junpei (1604) | Won 2-1 | +211465 |
| average opponent: 1506record: 2-3 | new rating: 1465 | |||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 127 | Mochizuki, Yasuhiro (1468) | Won 2-0 | +171517 |
| 2sealed | 359 | Iwabuchi, Sou (1468) | Lost 0-2 | -181499 |
| 3sealed | 827 | Koide, Yukua (1544) | Lost 0-2 | -181481 |
| 4sealed | 899 | Kaneko, Mitsutaka (1406) | Won 2-0 | +171498 |
| 5sealed | 842 | Asaki, Yuuta (1519) | Lost 0-2 | -181480 |
| average opponent: 1481record: 2-3 | new rating: 1480 | |||