Tsukahara, Yasuyuki
Current rating: 1424
| Grand Prix Hiroshima 2003 (extended) | starting rating: 1413 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 7 | Kataoka, Michiaki (1396) | Won 2-1 | +181431 |
| 2extended | 46 | Nomura, Eiji (1671) | Lost 1-2 | -141417 |
| 3extended | 135 | Masui, Yuusuke (1482) | Won 2-0 | +191436 |
| 4extended | 110 | Yasutomi, Hiroto (1509) | Won 2-0 | +201456 |
| 5extended | 42 | Abe, Ryou (1637) | Lost 1-2 | -151441 |
| 6extended | 102 | Tanaka, Toshifumi (1516) | Lost 1-2 | -171424 |
| top | average opponent: 1535record: 3-3 | new rating: 1424 | ||
| Grand Prix Utsunomiya 2002 (ONS rochester) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 191 | Kobayashi, Hajime (1450) | Lost 1-2 | -181429 |
| 2sealed | 257 | Kawakami, Hiroshi (1482) | Lost 1-2 | -171412 |
| 3sealed | 272 | Kotani, Satoshi (1464) | Won 2-0 | +191431 |
| 4sealed | 201 | Amao, Hiroshi (1432) | Lost 0-2 | -181413 |
| top | average opponent: 1457record: 1-3 | new rating: 1413 | ||
| Grand Prix Sendai 2001 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 89 | Okutomi, Hiromitsu (1518) | Lost 0-2 | -181482 |
| 3extended | 106 | Hashimoto, Yasuhiro (1482) | Lost 1-2 | -181464 |
| 4extended | 176 | Aizawa, Atsuo (1481) | Lost 1-2 | -171447 |
| 5extended | 180 | Sato, Ryota (1464) | Won 2-1 | +181465 |
| 6extended | 137 | Katou, Makoto (1480) | Lost 1-2 | -181447 |
| top | average opponent: 1485record: 1-4 | new rating: 1447 | ||