Ishizaki, Ren
Current rating: 1465
Record: 5-7
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1504 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 413 | Minotani, Jun (1542) | Lost 0-2 | -171487 |
| 2sealed | 640 | Matsushima, Naoki (1258) | Won 2-1 | +141501 |
| 3sealed | 745 | Tamura, Kenji (1527) | Lost 0-2 | -181483 |
| 4sealed | 1011 | Yamamoto, Kohei 0859 (1473) | Lost 1-2 | -181465 |
| average opponent: 1450record: 1-3 | new rating: 1465 | |||
| Grand Prix Yokohama 2019 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 322 | Takayanagi, Kenichi (1429) | Lost 1-2 | -191481 |
| 2modern | 649 | Wachi, Shinya (1696) | Won 2-0 | +221503 |
| 3modern | 943 | Araki, Ryusuke (1467) | Won 2-0 | +171520 |
| 4modern | 758 | Lee, Joon Soo (1799) | Lost 0-2 | -131507 |
| 5modern | 767 | Brown, Joel (1456) | Lost 0-2 | -191488 |
| 6modern | 870 | Haraguchi, Hiroki (1499) | Won 2-0 | +181506 |
| 7modern | 595 | Hidaka, Takuya (1398) | Won 2-1 | +161522 |
| 8modern | 407 | Tanaka, Tarou (1530) | Lost 0-2 | -181504 |
| average opponent: 1534record: 4-4 | new rating: 1504 | |||