Yamamoto, Seigo
Current rating: 1288
Record: 13-27
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1340 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 225 | Sasaki, Shou (1628) | Lost 1-2 | -131327 |
| 2sealed | 618 | Fukazawa, Yuuki (1524) | Lost 0-2 | -141313 |
| 3sealed | 982 | Ebara, Akihiro (1489) | Won 2-1 | +211334 |
| 4sealed | 988 | Ito, Chihiro (1502) | Lost 0-2 | -151319 |
| 5sealed | 905 | Hayakawa, Naoto (1474) | Lost 0-2 | -151304 |
| 6sealed | 798 | Shibayama, Hayato (1417) | Lost 0-2 | -161288 |
| top | average opponent: 1505record: 1-5 | new rating: 1288 | ||
| Grand Prix Yokohama 2019 (modern) | starting rating: 1358 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 558 | Toyama, Keiichi (1539) | Lost 0-2 | -151343 |
| 2modern | 652 | Francisco, Jerome (1510) | Won 2-1 | +211364 |
| 3modern | 688 | Araki, Youhei (1426) | Won 2-0 | +191383 |
| 4modern | 465 | Namikawa, Katsuya (1681) | Lost 0-2 | -121371 |
| 5modern | 855 | Nakajima, Ryo (1507) | Lost 1-2 | -161355 |
| 6modern | 802 | Fujita, Toshitake (1485) | Won 2-0 | +211376 |
| 7modern | 704 | Sakuma, Takamichi (1389) | Lost 1-2 | -181358 |
| 8modern | 622 | Tokeshi, Hiroki (1378) | Lost 1-2 | -181340 |
| top | average opponent: 1489record: 3-5 | new rating: 1340 | ||
| Grand Prix Shizuoka 2018 (legacy) (legacy) | starting rating: 1424 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 129 | Suzuki, Hiroyuki (1443) | Lost 1-2 | -181406 |
| 2legacy | 399 | Uchiyama, Masataka (1485) | Lost 0-2 | -161390 |
| 3legacy | 651 | Nakada, Shin'ya (1463) | Lost 0-2 | -171373 |
| 4legacy | 679 | Li, Kailun (1328) | Won 2-1 | +171390 |
| 5legacy | 608 | Akabane, Takahiro (1485) | Lost 1-2 | -161374 |
| 6legacy | 573 | Yamada, Ryusuke (1381) | Won 2-0 | +181392 |
| 7legacy | 467 | Oda, Kouichi (1500) | Lost 1-2 | -161376 |
| 8legacy | 432 | Kuroda, Yoshirou (1388) | Lost 1-2 | -181358 |
| top | average opponent: 1434record: 2-6 | new rating: 1358 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1476 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 649 | Uchiki, Takahiro (1481) | Lost 0-2 | -171459 |
| 2sealed | 681 | Asai, Tetsuya (1443) | Won 2-1 | +171476 |
| 3sealed | 755 | Hayashi, Katsuji (1473) | Lost 0-2 | -181458 |
| 4sealed | 852 | Kondou, Kiyoaki (1514) | Lost 1-2 | -171441 |
| 5sealed | 982 | Numata, Kou (1465) | Lost 1-2 | -171424 |
| 6sealed | 977 | Ikeda, Kengo (1321) | Won 2-0 | +161440 |
| 7sealed | 842 | Aizawa, Tamotsu (1460) | Lost 1-2 | -181422 |
| 8sealed | 785 | Nisi, Ryota (1526) | Won 2-1 | +201442 |
| 9sealed | 677 | Sakaguchi, Takuya (1429) | Lost 0-2 | -181424 |
| top | average opponent: 1457record: 3-6 | new rating: 1424 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 279 | Ebara, Satoshi (1433) | Won 2-0 | +171517 |
| 2modern | 256 | Tsuda, Seiya (1522) | Lost 0-2 | -181499 |
| 3modern | 790 | Maruyama, Shuji (1501) | Lost 1-2 | -181481 |
| 4modern | 985 | Iguchi, Tomohiro (1415) | Lost 1-2 | -191462 |
| 5modern | 1209 | Horikoshi, Riku (1463) | Won 2-1 | +181480 |
| 6modern | 949 | Miyahara, Shun (1478) | Lost 1-2 | -181462 |
| 7modern | 1038 | Hoshide, Naonari (1415) | Lost 0-2 | -191443 |
| 8modern | 923 | Nishikawa, Suguru (1447) | Won 2-1 | +181461 |
| 9modern | 792 | Tsuchiya, Yoshihiro (1323) | Won 2-1 | +151476 |
| top | average opponent: 1444record: 4-5 | new rating: 1476 | ||