Ishibashi, Yoshiro
Current rating: 1444
| Grand Prix Hiroshima 2006 (CSP limited) | starting rating: 1431 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 61 | Shoji, Kenta (1527) | Lost 0-2 | -161415 |
| 2sealed | 158 | Taga, Yosuke (1479) | Won 2-1 | +191434 |
| 3sealed | 65 | Itou, Motoaki (1523) | Lost 1-2 | -171417 |
| 4sealed | 159 | Yashiki, Kouichi (1516) | Won 2-1 | +201437 |
| 5sealed | 127 | Ikushima, Yasuyuki (1498) | Won 2-1 | +191456 |
| 6sealed | 91 | Coimbra, Andre (1802) | Lost 1-2 | -121444 |
| top | average opponent: 1557record: 3-3 | new rating: 1444 | ||
| Grand Prix Hiroshima 2003 (extended) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 4 | Imaizumi, Kenji (1545) | Won 2-0 | +201483 |
| 2extended | 13 | Mitsuhashi, Takashi (1595) | Lost 0-2 | -161467 |
| 3extended | 85 | Yoshinobu, Takashi (1448) | Draw 1-1 | 01467 |
| 4extended | 131 | Yanagawa, Tomoyuki (1502) | Lost 1-2 | -181449 |
| 5extended | 152 | Okada, Masami (1432) | Lost 1-2 | -181431 |
| top | average opponent: 1504record: 1-3-1 | new rating: 1431 | ||
| Grand Prix Hiroshima 2001 (INV limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 101 | Sodeyama, Yohei (1500) | Lost 1-2 | -181482 |
| 2sealed | 155 | Doi, Fumiaki (1551) | Won 2-1 | +191501 |
| 3sealed | 132 | Hasegawa, Taro (1466) | Lost 1-2 | -181483 |
| 4sealed | 181 | Sumino, Hironori (1413) | Lost 0-2 | -201463 |
| top | average opponent: 1482record: 1-3 | new rating: 1463 | ||