Hamatsu, Motoshi
Current rating: 1428
Record: 2-6
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 433 | Maeda, Jyunya (1535) | Lost 1-2 | -171483 |
| 2pioneer | 573 | Lee, Hyukjeong (1505) | Lost 0-2 | -181465 |
| 3pioneer | 815 | Wada, Tomoya (1481) | Lost 1-2 | -181447 |
| 4pioneer | 796 | Huang, Wei-Te (1447) | Won 2-0 | +181465 |
| 5pioneer | 718 | Yamada, Ryotaro (1509) | Won 2-1 | +191484 |
| 6pioneer | 556 | Horiuchi, Shingo (1410) | Lost 1-2 | -191465 |
| 7pioneer | 505 | Masuda, Shinichiro (1456) | Lost 1-2 | -181447 |
| 8pioneer | 427 | Kumakura, Takayuki (1412) | Lost 1-2 | -191428 |
| average opponent: 1469record: 2-6 | new rating: 1428 | |||