Iwamoto, Kazuma
Current rating: 1502
Record: 3-3
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 374 | Hotate, Yuta (1507) | Won 2-0 | +181518 |
| 2sealed | 126 | Yang, Siming (1476) | Lost 1-2 | -191499 |
| 3sealed | 667 | Yoshino, Shumpei (1507) | Won 2-1 | +191518 |
| 4sealed | 672 | Kamiyama, Yuji (1465) | Lost 1-2 | -191499 |
| 5sealed | 836 | Koide, Yukua (1559) | Won 2-0 | +191518 |
| 6sealed | 596 | Zhou, Zhaoqi (1670) | Lost 0-2 | -161502 |
| average opponent: 1531record: 3-3 | new rating: 1502 | |||