Aruga, Masakazu
Current rating: 1394
Record: 1-7
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 415 | Sasaki, Akira (1500) | Lost 1-2 | -181482 |
| 2pioneer | 470 | Suzuki, Yuta (1389) | Lost 1-2 | -201462 |
| 3pioneer | 728 | Li, Zongxuan (1460) | Won 2-0 | +181480 |
| 4pioneer | 739 | Sasaki, Shou (1584) | Lost 0-2 | -161464 |
| 5pioneer | 680 | Ito, Yoichi (1468) | Lost 1-2 | -181446 |
| 6pioneer | 652 | Tsukadaira, Kouki (1443) | Lost 0-2 | -181428 |
| 7pioneer | 544 | Yamamoto, Takatoyo (1480) | Lost 0-2 | -171411 |
| 8pioneer | 445 | Mine, Ryunosuke (1447) | Lost 1-2 | -171394 |
| average opponent: 1472record: 1-7 | new rating: 1394 | |||