Kubo, Atsutoshi
Current rating: 1508
Record: 4-4
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 66 | Nomura, Hidehiro (1789) | Lost 0-2 | -131487 |
| 2sealed | 721 | Hayashi, Hiroki (1757) | Won 2-1 | +231510 |
| 3sealed | 707 | Osako, Sho (1502) | Lost 0-2 | -181492 |
| 4sealed | 804 | Satou, Marin (1578) | Lost 1-2 | -171475 |
| 5sealed | 910 | Kagami, Chisei (1464) | Won 2-0 | +181493 |
| 6sealed | 729 | Sato, Tatsuo (1409) | Won 2-1 | +171510 |
| 7sealed | 509 | Hayashi, Hisaaki (1459) | Lost 1-2 | -191491 |
| 8sealed | 491 | Shibayama, Hayato (1452) | Won 2-1 | +171508 |
| average opponent: 1551record: 4-4 | new rating: 1508 | |||