Iwanaga, Koki
Current rating: 1629
Record: 15-8
| Grand Prix Nagoya 2019 (ELD standard) | starting rating: 1650 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 359 | Furukawa, Syun6268 (1351) | Lost 0-2 | -241626 |
| 2standard | 456 | Furuya, Sachiko (1481) | Won 2-0 | +161642 |
| 3standard | 546 | Matsuura, Jo (1429) | Won 2-0 | +141656 |
| 4standard | 318 | Yamashita, Kouhei (1521) | Won 2-1 | +161672 |
| 5standard | 170 | Shimamura, Yukihiro (1601) | Won 2-1 | +161688 |
| 6standard | 167 | Kawaguchi, Takashi (1636) | Lost 0-2 | -191669 |
| 7standard | 381 | Kashiwa, Tomohiro (1573) | Lost 1-2 | -191650 |
| 8standard | 336 | Oota, Takahiro (1490) | Lost 1-2 | -211629 |
| average opponent: 1510record: 4-4 | new rating: 1629 | |||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 225 | Murayama, Kazuhiro (1449) | Won 2-1 | +171517 |
| 2sealed | 239 | Takeshi, Sugawara (1518) | Won 2-0 | +181535 |
| 3sealed | 472 | Sakata, Naoya (1574) | Lost 1-2 | -171518 |
| 4sealed | 506 | Lee, Hung (1631) | Won 2-0 | +201538 |
| 5sealed | 497 | Kondou, Masaru (1696) | Won 2-0 | +211559 |
| 6sealed | 193 | Sakurai, Kouta (1557) | Won 2-0 | +181577 |
| 7sealed | 176 | Sugisawa, Tsuyoshi (1657) | Won 2-1 | +191596 |
| 8sealed | 84 | Tomomura, Hitoshi (1934) | Won 2-0 | +241620 |
| 9sealed | 40 | Wang, Haokang (1956) | Lost 0-2 | -121608 |
| 10draft | 569 | Ookawa, Yuusuke (1672) | Lost 1-2 | -171591 |
| 11draft | 621 | Higurashi, Yukinao (1617) | Won 2-1 | +191610 |
| 12draft | 623 | Oiso, Kenji (1789) | Won 2-0 | +211631 |
| 13draft | 561 | Furusawa, Shu (1700) | Won 2-1 | +191650 |
| 14draft | 722 | Tezuka, Yuuki (1674) | Lost 0-2 | -171633 |
| 15draft | 661 | Fujioka, Kazato (1587) | Won 2-0 | +171650 |
| average opponent: 1667record: 11-4 | new rating: 1650 | |||