Hayamizu, Keiichi
Current rating: 1481
Record: 2-3
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 721 | Ooi, Masaki (1500) | Won 2-0 | +181518 |
| 2sealed | 818 | Takezaki, Rei (1517) | Lost 1-2 | -181500 |
| 3sealed | 860 | Ueda, Takushi (1483) | Won 2-0 | +181518 |
| 4sealed | 962 | Hasegawa, Kazuhiko3707 (1482) | Lost 0-2 | -191499 |
| 5sealed | 918 | Oowani, Kazuki (1500) | Lost 1-2 | -181481 |
| average opponent: 1496record: 2-3 | new rating: 1481 | |||