Katsuraguchi, Koichi
Current rating: 1520
Record: 4-3
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 438 | Watanabe, Yasuyuki (1503) | Won 2-1 | +181518 |
| 2pioneer | 90 | Igarashi, Junpei (1636) | Won 2-0 | +201538 |
| 3pioneer | 222 | Ajitomi, Takeshi (1584) | Lost 1-2 | -171521 |
| 4pioneer | 304 | Yoshimori, Sho (1633) | Won 2-1 | +201541 |
| 5pioneer | 118 | Tanaka, Shun (1443) | Lost 0-2 | -201521 |
| 6pioneer | 341 | Nishikawa, Seigo (1490) | Won 2-0 | +181539 |
| 7pioneer | 228 | Kosuga, Shuhei (1473) | Lost 0-2 | -191520 |
| average opponent: 1537record: 4-3 | new rating: 1520 | |||