Iwasaki, Keito
Current rating: 1497
| Grand Prix Yokohama 2019 (modern) | starting rating: 1540 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 226 | Tatebe, Takayuki (1403) | Lost 0-2 | -201520 |
| 2modern | 784 | Komine, Naoyuki (1458) | Lost 1-2 | -191501 |
| 3modern | 1120 | Kaga, Hiroyuki (1653) | Lost 1-2 | -161485 |
| 4modern | 1178 | Yamamoto, Takayoshi (1374) | Won 2-0 | +161501 |
| 5modern | 979 | Kobe, Shohei (1476) | Won 2-0 | +181519 |
| 6modern | 775 | Fukuda, Keisuke (1483) | Lost 0-2 | -191500 |
| 7modern | 769 | Shoji, Taku (1512) | Won 2-1 | +181518 |
| 8modern | 624 | Tanaka, Makoto1460 (1338) | Lost 1-2 | -211497 |
| top | average opponent: 1462record: 3-5 | new rating: 1497 | ||
| Grand Prix Shizuoka 2018 (legacy) (legacy) | starting rating: 1506 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 385 | Traboco, Manuel (1521) | Won 2-0 | +181524 |
| 2legacy | 67 | Tanikawa, Hironori (1569) | Lost 0-2 | -171507 |
| 3legacy | 566 | Suguro, Junki (1497) | Lost 0-2 | -181489 |
| 4legacy | 556 | Sadato, Daichi (1510) | Won 2-0 | +181507 |
| 5legacy | 506 | Matsumura, Shinya (1402) | Lost 0-2 | -201487 |
| 6legacy | 470 | Kabe, Naoyuki (1349) | Won 2-0 | +161503 |
| 7legacy | 311 | Kurita, Yudai (1587) | Won 2-1 | +191522 |
| 8legacy | 236 | Oryu, Daichi (1522) | Won 2-0 | +181540 |
| top | average opponent: 1495record: 5-3 | new rating: 1540 | ||
| Grand Prix Chiba 2016 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 499 | Kurosawa, Takuto (1500) | Lost 1-2 | -181482 |
| 3legacy | 684 | Okutomi, Hiromitsu (1380) | Won 2-1 | +161498 |
| 4legacy | 513 | Iida, Naoki (1481) | Won 2-0 | +181516 |
| 5legacy | 333 | Yuasa, Masaki (1530) | Lost 1-2 | -181498 |
| 6legacy | 533 | Mercier, Mathew (1743) | Won 2-1 | +221520 |
| 7legacy | 235 | Takakura, Shota (1623) | Lost 0-2 | -161504 |
| 8legacy | 402 | Kaneko, Yasuki (1544) | Won 2-0 | +191523 |
| 9legacy | 489 | Nakamura, Ryota (1565) | Lost 0-2 | -171506 |
| top | average opponent: 1546record: 4-4 | new rating: 1506 | ||