Iseki, Takao
Current rating: 1447
Record: 3-6
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 49 | Ishiduka, Hazime (1498) | Won 2-0 | +181518 |
| 2sealed | 76 | Miyabe, Kouichi (1503) | Lost 0-2 | -181500 |
| 3sealed | 203 | Kudo, Tomoaki (1472) | Lost 1-2 | -191481 |
| 4sealed | 444 | Kajima, Hiroyuki (1483) | Won 2-0 | +181499 |
| 5sealed | 250 | Suzuki, Taiki (1680) | Lost 0-2 | -151484 |
| 6sealed | 303 | Matsumura, Takehiko (1396) | Lost 1-2 | -191465 |
| 7sealed | 282 | Yanagawa, Yuuki (1463) | Lost 1-2 | -181447 |
| 8sealed | 360 | Maeda, Takayuki (1373) | Won 2-1 | +161463 |
| 9sealed | 360 | Kanazawa, Yuusuke (1525) | Lost 1-2 | -161447 |
| average opponent: 1488record: 3-6 | new rating: 1447 | |||