Yamamoto, Kazuhiro
Current rating: 1435
| Grand Prix Yokohama 2012 (modern) | starting rating: 1427 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 475 | Takemura, Shintaro (1500) | Lost 1-2 | -171410 |
| 2modern | 575 | Obata, Koji (1481) | Lost 0-2 | -161394 |
| 3modern | 683 | Yasui, Yusuke (1464) | Won 2-1 | +191413 |
| 4modern | 563 | Kasahara, Yuuki (1499) | Lost 0-2 | -171396 |
| 5modern | 631 | Damandaman, German (1465) | Won 2-0 | +201416 |
| 6modern | 499 | Sakano, Tatsuo (1466) | Won 2-0 | +191435 |
| top | average opponent: 1479record: 3-3 | new rating: 1435 | ||
| Grand Prix Yokohama 2010 (extended) | starting rating: 1498 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 181 | Kanamori, Yusuke (1500) | Lost 0-2 | -181480 |
| 2extended | 435 | Tanaka, Kouichi (1525) | Lost 0-2 | -171463 |
| 3extended | 426 | Morii, Hiroyuki (1468) | Lost 0-2 | -181445 |
| 4extended | 477 | Aizawa, Seiji (1444) | Lost 1-2 | -181427 |
| top | average opponent: 1484record: 0-4 | new rating: 1427 | ||
| Grand Prix Kyoto 2007 (PLC standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 235 | Yorke, Chris (1500) | Won 2-0 | +181518 |
| 2standard | 146 | Morita, Masayuki (1429) | Won 2-1 | +161534 |
| 3standard | 62 | Obata, Masayuki (1535) | Lost 1-2 | -181516 |
| 4standard | 204 | Tamai, Katsuyoshi (1517) | Lost 1-2 | -181498 |
| 5standard | 296 | Oota, Yuusuke (1481) | Won 2-1 | +181516 |
| 6standard | 199 | Kumoura, Daisuke (1514) | Lost 1-2 | -181498 |
| top | average opponent: 1496record: 3-3 | new rating: 1498 | ||