Mastui, Hayato
Current rating: 1503
Record: 3-3
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 148 | Nakamura, Satoshi (1554) | Won 2-1 | +191519 |
| 2sealed | 296 | Ozawa, Yoshimasa (1519) | Lost 0-2 | -181501 |
| 3sealed | 443 | Tasugi, Keigo (1479) | Won 2-1 | +181519 |
| 4sealed | 143 | Yamada, Sintarou (1526) | Lost 1-2 | -181501 |
| 5sealed | 373 | Yokoyama, Takuya (1482) | Won 2-1 | +171518 |
| 6sealed | 291 | Shiba, Naoto (1635) | Lost 0-2 | -151503 |
| average opponent: 1533record: 3-3 | new rating: 1503 | |||