Kobayashi, Hidetoshi
Current rating: 1362
Record: 3-11
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1371 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 337 | Oh, Young Seok (1484) | Lost 1-2 | -161355 |
| 2sealed | 322 | Okai, Takahiro (1462) | Won 2-0 | +201375 |
| 3sealed | 291 | Terai, Tadayuki (1469) | Lost 0-2 | -161359 |
| 4sealed | 362 | Maeda, Yasuyuki (1459) | Won 2-0 | +201379 |
| 5sealed | 369 | Hasegawa, Tsuguto (1446) | Lost 1-2 | -171362 |
| average opponent: 1464record: 2-3 | new rating: 1362 | |||
| Grand Prix Yokohama 2012 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 268 | Kanaoka, Yoshihiko (1500) | Won 2-1 | +181518 |
| 2modern | 251 | Kozakai, Yukio (1515) | Lost 0-2 | -181500 |
| 3modern | 435 | Morishima, Kenta (1534) | Lost 0-2 | -171483 |
| 4modern | 531 | Sato, Masazumi (1487) | Lost 0-2 | -181465 |
| 5modern | 596 | Nagai, Masaya (1460) | Lost 0-2 | -181447 |
| 6modern | 567 | Kashiwagi, Junichi (1445) | Lost 0-2 | -181429 |
| 7modern | 478 | Yamasaki, Sadaharu (1224) | Lost 0-2 | -221407 |
| 8modern | 390 | Arai, Ikki (1409) | Lost 0-2 | -181389 |
| 9modern | 310 | Hatai, Eiichirou (1405) | Lost 1-2 | -181371 |
| average opponent: 1442record: 1-8 | new rating: 1371 | |||