Ishizuka, Shinji
Current rating: 1479
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1455 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 712 | Hayashi, Takahiko (1500) | Lost 1-2 | -171438 |
| 2sealed | 970 | Ichikawa, Takayoshi (1575) | Won 2-1 | +201458 |
| 3sealed | 877 | Yoshioka, Kousuke (1498) | Won 2-1 | +191477 |
| 4sealed | 833 | Mitsuboshi, Daisuke (1465) | Won 2-1 | +181495 |
| 5sealed | 838 | Honda, Yuji (1589) | Lost 1-2 | -161479 |
| top | average opponent: 1526record: 3-2 | new rating: 1479 | ||
| Grand Prix Nagoya 2012 (RTR standard) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 490 | Seki, Keita (1686) | Won 2-0 | +221505 |
| 2standard | 32 | Nomura, Takeshi (1518) | Lost 1-2 | -181487 |
| 3standard | 370 | Lin, Chris [HKG] (1499) | Lost 1-2 | -181469 |
| 4standard | 611 | Matsuda, Yuuki (1559) | Won 2-0 | +201489 |
| 5standard | 411 | Tatara, Atsushi (1552) | Lost 1-2 | -171472 |
| 6standard | 547 | Mizutani, Naoto (1518) | Lost 1-2 | -171455 |
| top | average opponent: 1555record: 2-4 | new rating: 1455 | ||
| Grand Prix Yokohama 2012 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 50 | Karikome, Hiroaki (1500) | Won 2-0 | +181518 |
| 2modern | 20 | Iioka, Natsuru (1533) | Lost 0-2 | -181500 |
| 3modern | 391 | Matsumoto, Takahiro (1449) | Won 2-1 | +171517 |
| 4modern | 208 | Miura, Yuuki (1597) | Lost 0-2 | -161501 |
| 5modern | 405 | Yoshida, Mitsutaka (1224) | Won 2-1 | +131514 |
| 6modern | 417 | Ebitani, Keisuke (1535) | Lost 0-2 | -181496 |
| 7modern | 342 | Tamura, Ryo (1781) | Lost 0-2 | -131483 |
| top | average opponent: 1517record: 3-4 | new rating: 1483 | ||