Koizumi, Syuujirou
Current rating: 1504
Record: 4-4
| Grand Prix Kobe 2017 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 710 | Terauchi, Yutaro (1417) | Won 2-0 | +161516 |
| 2modern | 334 | Kamio, Hiroyuki (1547) | Won 2-0 | +191535 |
| 3modern | 584 | Kihara, Atsuki (1781) | Lost 1-2 | -141521 |
| 4modern | 503 | Kuriyama, Toshikazu (1420) | Won 2-1 | +171538 |
| 5modern | 304 | Nakano, Taiki (1517) | Lost 0-2 | -191519 |
| 6modern | 477 | Ishii, Taisuke (1781) | Lost 0-2 | -131506 |
| 7modern | 907 | Yoshimura, Naoki (1533) | Won 2-0 | +181524 |
| 8modern | 669 | Siagian, Yohannes (1395) | Lost 1-2 | -201504 |
| average opponent: 1549record: 4-4 | new rating: 1504 | |||