Iwasaki, Yohei
Current rating: 1539
Record: 5-3
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 103 | Takiguchi, Itsuki (1385) | Won 2-0 | +161516 |
| 2sealed | 64 | Nishimura, Koichi (1425) | Won 2-1 | +161532 |
| 3sealed | 241 | Umeyama, Yuuichi (1611) | Lost 0-2 | -161516 |
| 4sealed | 495 | Kondou, Masaki (1435) | Won 2-0 | +161532 |
| 5sealed | 470 | Hirase, Gun (1562) | Won 2-0 | +191551 |
| 6sealed | 208 | Washida, Hiroshi (1608) | Lost 0-2 | -171534 |
| 7sealed | 344 | Urasaki, Takayuki (1613) | Won 2-1 | +191553 |
| 8sealed | 243 | Kawakami, Hiroshi (1769) | Lost 1-2 | -141539 |
| average opponent: 1551record: 5-3 | new rating: 1539 | |||