Naotaka, Ishigami
Current rating: 1519
Record: 4-3
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 43 | Hori, Masayuki (1500) | Lost 0-2 | -181482 |
| 2sealed | 393 | Yuasa, Kentarou (1634) | Won 2-0 | +211503 |
| 3sealed | 367 | Nagashima, Hirohisa (1500) | Won 2-0 | +181521 |
| 4sealed | 246 | Takahashi, Akira (1516) | Won 2-0 | +181539 |
| 5sealed | 142 | Ito, Masato (1483) | Won 2-0 | +171556 |
| 6sealed | 121 | Narukawa, Takaya (1548) | Lost 1-2 | -191537 |
| 7sealed | 189 | Watanabe, Ryoji (1495) | Lost 1-2 | -181519 |
| average opponent: 1525record: 4-3 | new rating: 1519 | |||