Sugahara, Hideyuki
Current rating: 1496
Record: 11-12-6
| Grand Prix Yamagata 2006 (TSP limited) | starting rating: 1494 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 10 | Hirashima, Yuutarou (1500) | Won 2-1 | +181512 |
| 2sealed | 26 | Kurisu, Takashi (1484) | Won 2-1 | +171529 |
| 3sealed | 11 | Aoki, Ryousuke (1695) | Lost 0-2 | -151514 |
| 4sealed | 74 | Sato, Koutarou (1518) | Lost 1-2 | -181496 |
| top | average opponent: 1549record: 2-2 | new rating: 1496 | ||
| Grand Prix Yokohama 2004 (COK limited) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 13 | Oshima, Kazuaki (1500) | Won 2-0 | +191465 |
| 2sealed | 70 | Sato, Daisuke (1402) | Won 2-0 | +171482 |
| 3sealed | 41 | Nakatani, Haruki (1640) | Won 2-0 | +211503 |
| 4sealed | 36 | Aridome, Tomohiro (1620) | Draw 1-1 | +21505 |
| 5sealed | 40 | Hayashi, Hiroki (1721) | Won 2-0 | +221527 |
| 6sealed | 21 | Matsuo, Keita (1496) | Lost 0-2 | -191508 |
| 7sealed | 52 | Nomura, Eiji (1669) | Draw 1-1 | +31511 |
| 8sealed | 52 | Ohmura, Satoshi (1538) | Lost 0-2 | -171494 |
| top | average opponent: 1573record: 4-2-2 | new rating: 1494 | ||
| Grand Prix Sendai 2004 (DST limited) | starting rating: 1499 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 74 | Sogabe, Ippei (1535) | Lost 0-2 | -171482 |
| 4sealed | 119 | Nakao, Munenari (1462) | Lost 1-2 | -191463 |
| 5sealed | 114 | Hasegawa, Tomokazu (1504) | Lost 0-2 | -171446 |
| top | average opponent: 1500record: 0-3 | new rating: 1446 | ||
| Grand Prix Utsunomiya 2002 (ONS rochester) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 49 | Naito, Kiyoshi (1500) | Draw 1-1 | 01500 |
| 2sealed | 182 | Suzuki, Mayumi (1492) | Won 2-0 | +181518 |
| 3sealed | 105 | Tatsuhara, Satoshi (1520) | Lost 0-2 | -181500 |
| 4sealed | 182 | Tanaka, Takayuki (1501) | Won 2-1 | +181518 |
| 5sealed | 122 | Matsumoto, Hiroshi (1519) | Lost 0-2 | -181500 |
| 6sealed | 161 | Noguchi, Masahiro (1464) | Draw 1-1 | -11499 |
| 7sealed | 144 | Ueda, Ai (1500) | Won 2-0 | +181517 |
| 8sealed | 52 | Higuchi, Daisaku (1501) | Lost 0-2 | -181499 |
| top | average opponent: 1500record: 3-3-2 | new rating: 1499 | ||
| Grand Prix Sendai 2001 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 79 | Otsuki, Yuichi (1500) | Won 2-0 | +181518 |
| 2extended | 82 | Maruyama, Takaaki (1518) | Draw 1-1 | 01518 |
| 3extended | 89 | Haneda, Masatoshi (1518) | Draw 1-1 | 01518 |
| 4extended | 132 | Kimoto, Kenji (1518) | Lost 1-2 | -181500 |
| 5extended | 159 | Hanada, Haruki (1497) | Won 2-1 | +181518 |
| 6extended | 124 | Niwa, Takashi (1521) | Lost 0-1 | -181500 |
| top | average opponent: 1512record: 2-2-2 | new rating: 1500 | ||