Iiduka, Kazuhiko
Current rating: 1654
Record: 15-8
| Grand Prix Nagoya 2019 (ELD standard) | starting rating: 1545 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 261 | Nozawa, Yuusuke (1551) | Lost 1-2 | -181527 |
| 2standard | 474 | Komatsu, Yuuhei (1562) | Won 2-1 | +191546 |
| 3standard | 619 | Naganawa, Daichi (1466) | Won 2-1 | +171563 |
| 4standard | 355 | Takeyama, Hiroaki (1599) | Won 2-0 | +181581 |
| 5standard | 264 | Ohkura, Ryota (1609) | Won 2-1 | +191600 |
| 6standard | 143 | Ohori, Akihito (1496) | Won 2-1 | +161616 |
| 7standard | 135 | Eguchi, Yukio (1677) | Lost 0-2 | -171599 |
| 8standard | 120 | Konda, Tsuyoshi (1653) | Won 2-0 | +191618 |
| 9standard | 75 | Ohki, Tatsuhiko (1911) | Lost 0-2 | -131605 |
| 10standard | 168 | Nakashima, Shunichi (1815) | Won 2-0 | +221627 |
| 11standard | 96 | Miyabe, Kouichi (1775) | Lost 0-2 | -151612 |
| 12standard | 122 | Nose, Koji (1831) | Lost 1-2 | -141598 |
| 13standard | 126 | Akamine, Yuta (1556) | Won 2-1 | +171615 |
| 14standard | 115 | Sekikawa, Daichi (1818) | Won 2-1 | +211636 |
| 15standard | 101 | Ito, Akihiko (1593) | Won 2-1 | +181654 |
| average opponent: 1661record: 10-5 | new rating: 1654 | |||
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 572 | Morioka, Ryota (1522) | Lost 1-2 | -181482 |
| 2sealed | 754 | Aoyama, Yuki (1372) | Lost 1-2 | -201462 |
| 3sealed | 1051 | Suzuki, Yasufumi (1512) | Won 2-0 | +191481 |
| 4sealed | 799 | Mayumi, Tomohito (1483) | Won 2-0 | +181499 |
| 5sealed | 839 | Matsumoto, Keiichiro (1543) | Won 2-0 | +191518 |
| 6sealed | 644 | Takamatsu, Sou (1521) | Won 2-1 | +181536 |
| 7sealed | 489 | Yeh, Rueyjer (1758) | Won 2-1 | +221558 |
| 8sealed | 264 | Sugaya, Hironobu (1848) | Lost 0-2 | -131545 |
| average opponent: 1570record: 5-3 | new rating: 1545 | |||