Ishiba, Hiroshi
Current rating: 1504
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1485 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 36 | Kubo, Haruki (1381) | Won 2-0 | +161501 |
| 2sealed | 154 | Shimada, Tomoyuki (1518) | Lost 0-2 | -181483 |
| 3sealed | 405 | Nakaigawa, Takeshi (1481) | Lost 0-2 | -181465 |
| 4sealed | 418 | Sakamoto, Ryouhei (1448) | Won 2-0 | +181483 |
| 5sealed | 345 | Syouichi, Kihara (1500) | Won 2-0 | +181501 |
| 6sealed | 251 | Sugimoto, Nobuhiro (1522) | Won 2-1 | +191520 |
| 7sealed | 135 | Fujii, Daisuke (1632) | Lost 1-2 | -161504 |
| top | average opponent: 1497record: 4-3 | new rating: 1504 | ||
| Grand Prix Nagoya 2012 (RTR standard) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 488 | Inoue, Masataka (1441) | Won 2-0 | +171482 |
| 2standard | 344 | Takahashi, Kei (1546) | Lost 0-2 | -161466 |
| 3standard | 416 | Kashiwagi, Keisuke (1503) | Won 2-1 | +181484 |
| 4standard | 334 | Shono, Takanari (1502) | Lost 0-2 | -171467 |
| 5standard | 603 | Ono, Kotaro (1499) | Won 2-1 | +181485 |
| 6standard | 321 | Nagase, Hirofumi (1484) | Won 2-0 | +181503 |
| 7standard | 161 | Wada, Kazunori (1493) | Lost 1-2 | -181485 |
| top | average opponent: 1496record: 4-3 | new rating: 1485 | ||
| Grand Prix Kobe 2012 (DKA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 7 | Murase, Motonori (1508) | Lost 1-2 | -181482 |
| 2sealed | 327 | Shimizu, Kouji (1490) | Won 2-0 | +181500 |
| 3sealed | 217 | Ichikawa, Takayoshi (1570) | Lost 1-2 | -161484 |
| 4sealed | 452 | Nakamura, Fumitake (1442) | Lost 0-2 | -191465 |
| top | average opponent: 1503record: 1-3 | new rating: 1465 | ||