Koiwa, Daijiro
Current rating: 1445
Record: 0-3
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 51 | Shimazu, Yoshiki (1614) | Lost 1-2 | -161484 |
| 2sealed | 766 | Kobayashi, Masahiro (1343) | Lost 1-2 | -201464 |
| 3sealed | 1149 | Kato, Hiroki3246 (1441) | Lost 1-2 | -191445 |
| average opponent: 1466record: 0-3 | new rating: 1445 | |||