Yokoyama, Osamu
Current rating: 1464
Record: 1-3
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2102 | Nakajima, Motohiro (1500) | Lost 1-2 | -181482 |
| 2sealed | 2383 | Li, Way (1478) | Won 2-0 | +181500 |
| 3sealed | 2328 | Mizumura, Ukon (1505) | Lost 0-2 | -181482 |
| 4sealed | 2422 | Tamai, Yuno (1454) | Lost 1-2 | -181464 |
| average opponent: 1484record: 1-3 | new rating: 1464 | |||