Ishikawa, Sou
Current rating: 1455
Record: 3-6-1
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1445 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 944 | Yang, Jun-mo (1500) | Won 2-0 | +191464 |
| 2sealed | 825 | Mizutani, Naoki (1611) | Lost 1-2 | -151449 |
| 3sealed | 858 | Yoshiaki K., (1524) | Won 2-0 | +201469 |
| 4sealed | 798 | Matsubara, Tohru (1556) | Lost 0-2 | -171452 |
| 5sealed | 919 | Sato, Takatoshi (1631) | Won 2-1 | +211473 |
| 6sealed | 816 | Mitsuboshi, Daisuke (1468) | Lost 0-2 | -181455 |
| average opponent: 1548record: 3-3 | new rating: 1455 | |||
| Grand Prix Yokohama 2012 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 394 | Fujii, Masahiro (1503) | Lost 0-2 | -181482 |
| 2modern | 468 | Osanai, Takashi (1450) | Lost 0-2 | -191463 |
| 3modern | 659 | Nishiwaki, Tatsuya (1464) | Lost 0-2 | -181445 |
| 4modern | 707 | Imai, Yoshihisa (1446) | Draw 1-1 | 01445 |
| average opponent: 1466record: 0-3-1 | new rating: 1445 | |||