Sekine, Tadatoshi
Current rating: 1485
Record: 3-4
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 847 | Ogawara, Youhei (1500) | Won 2-0 | +181518 |
| 2sealed | 793 | Aizawa, Keiji (1657) | Won 2-0 | +211539 |
| 3sealed | 838 | Nihei, Naoya (1520) | Lost 0-2 | -191520 |
| 4sealed | 929 | Akimoto, Koshi (1513) | Lost 0-2 | -181502 |
| 5sealed | 982 | Takahashi, Masakazu (1484) | Lost 0-2 | -181484 |
| 6sealed | 970 | Matsuda, Kenji (1446) | Lost 0-2 | -191465 |
| 7sealed | 926 | Asai, Ryutaro (1553) | Won 2-1 | +201485 |
| average opponent: 1525record: 3-4 | new rating: 1485 | |||