Chiba, Katsutoshi
Current rating: 1451
Record: 9-13-2
| Grand Prix Sendai 2004 (DST limited) | starting rating: 1439 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 101 | Ishiyama, Hiroki (1514) | Won 2-1 | +201459 |
| 2sealed | 10 | Fujino, Kimihiro (1530) | Lost 1-2 | -171442 |
| 3sealed | 157 | Yanagawa, Tsubasa (1499) | Lost 1-2 | -171425 |
| 4sealed | 223 | Nakajima, Chikara (1690) | Won 2-1 | +231448 |
| 5sealed | 167 | Ogami, Kenji (1630) | Won 2-1 | +211469 |
| 6sealed | 106 | Kishida, Hirokazu (1473) | Lost 0-2 | -181451 |
| top | average opponent: 1556record: 3-3 | new rating: 1451 | ||
| Grand Prix Shizuoka 2003 (MRD limited) | starting rating: 1471 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 35 | Noda, Koji (1537) | Won 2-1 | +201491 |
| 2sealed | 2 | Sakurada, Kouichi (1585) | Lost 0-2 | -171474 |
| 3sealed | 197 | Kondo, Hirohito (1502) | Lost 0-2 | -171457 |
| 4sealed | 229 | Kaminicki, Justin (1481) | Lost 0-2 | -181439 |
| top | average opponent: 1526record: 1-3 | new rating: 1439 | ||
| Grand Prix Yokohama 2003 (Onslaught block) | starting rating: 1485 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 71 | Suzuki, Ryuuichi (1553) | Lost 0-2 | -171468 |
| 2block | 334 | Sugimura, Yoshiyasu (1482) | Won 2-0 | +191487 |
| 3block | 240 | Moriguchi, Taiyo (1502) | Won 2-0 | +181505 |
| 4block | 153 | Kubouchi, Naoki (1593) | Lost 0-2 | -171488 |
| 5block | 276 | Nishiwaki, Kazuhisa (1543) | Lost 1-2 | -171471 |
| top | average opponent: 1535record: 2-3 | new rating: 1471 | ||
| Grand Prix Utsunomiya 2002 (ONS rochester) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 68 | Sato, Naoshi (1502) | Draw 1-1 | +11483 |
| 2sealed | 171 | Katou, Dai (1499) | Won 2-0 | +181501 |
| 3sealed | 114 | Yamaguchi, Kazuhiro (1518) | Draw 1-1 | 01501 |
| 4sealed | 179 | Uchida, Takuya (1589) | Lost 0-2 | -161485 |
| top | average opponent: 1527record: 1-1-2 | new rating: 1485 | ||
| Grand Prix Shizuoka 2001 (ODY limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 183 | Kikuchi, Tomohiko (1500) | Lost 0-2 | -181482 |
| 2sealed | 304 | Taru, Genki (1508) | Won 2-0 | +181500 |
| 3sealed | 229 | Mizuno, Akimitsu (1497) | Lost 1-2 | -181482 |
| 4sealed | 230 | Hagihara, Shiho (1483) | Won 2-0 | +181500 |
| 5sealed | 193 | Miyoshida, Kunio (1503) | Lost 0-2 | -181482 |
| top | average opponent: 1498record: 2-3 | new rating: 1482 | ||