Yamamoto, Sadaaki
Current rating: 1435
Record: 10-15-2
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 706 | Morita, Takanori (1518) | Lost 0-2 | -171429 |
| 3sealed | 974 | Sato, Shinsuke (1498) | Won 2-0 | +191448 |
| 4sealed | 843 | Takeda, Kazuki (1522) | Won 2-1 | +201468 |
| 5sealed | 787 | Miyachi, Kenta (1536) | Lost 0-2 | -171451 |
| 6sealed | 851 | Baba, Yasunori (1578) | Lost 0-2 | -161435 |
| top | average opponent: 1531record: 2-3 | new rating: 1435 | ||
| Grand Prix Nagoya 2012 (RTR standard) | starting rating: 1476 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 11 | Owada, Kazuya (1519) | Won 2-1 | +191495 |
| 3standard | 16 | Shiraishi, Ryou (1596) | Lost 0-2 | -161479 |
| 4standard | 464 | Kanayama, Haruki (1524) | Lost 1-2 | -171462 |
| 5standard | 596 | Takaoka, Yusuke (1613) | Lost 1-2 | -161446 |
| 6standard | 554 | Amayasu, Kazunori (1424) | Draw 1-1 | 01446 |
| top | average opponent: 1535record: 1-3-1 | new rating: 1446 | ||
| Grand Prix Yokohama 2012 (modern) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 334 | Inoue, Yu (1560) | Won 2-1 | +191501 |
| 3modern | 54 | Kim, Min-su (Japan) (1850) | Lost 1-2 | -121489 |
| 4modern | 197 | Durbidge, Levi (1498) | Won 2-1 | +191508 |
| 5modern | 106 | Kobayashi, Takeru (1542) | Won 2-1 | +181526 |
| 6modern | 107 | Chen, Liang (1800) | Lost 0-2 | -131513 |
| 7modern | 163 | Matsubara, Takeyuki (1492) | Lost 0-2 | -181495 |
| 8modern | 269 | Mitsuhashi, Shou (1464) | Lost 0-2 | -191476 |
| top | average opponent: 1601record: 3-4 | new rating: 1476 | ||
| Grand Prix Sendai 2010 (ROE standard) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 116 | Matsuo, Keita (1433) | Won 2-1 | +171499 |
| 2standard | 83 | Fujii, Kohei (1518) | Lost 0-2 | -181481 |
| 3standard | 219 | Asaoka, Riku (1504) | Won 2-1 | +181499 |
| 4standard | 186 | Kurita, Kyousuke (1518) | Won 2-1 | +191518 |
| 5standard | 79 | Okauchi, Yuuta (1502) | Lost 1-2 | -181500 |
| 6standard | 157 | Saitou, Isao (1521) | Lost 1-2 | -181482 |
| top | average opponent: 1499record: 3-3 | new rating: 1482 | ||
| Grand Prix Yokohama 2010 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 90 | Mochizuki, Kazuhiro (1467) | Draw 1-1 | -11499 |
| 2extended | 274 | Handa, Takuya (1473) | Lost 1-2 | -181481 |
| 3extended | 399 | Hamanaka, Hiroki (1482) | Won 2-1 | +181499 |
| 4extended | 322 | Wada, Hiroya (1534) | Lost 1-2 | -171482 |
| top | average opponent: 1489record: 1-2-1 | new rating: 1482 | ||