Seki, Masanosuke
Current rating: 1455
Record: 12-16-2
| Grand Prix Nagoya 2019 (ELD standard) | starting rating: 1448 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 352 | Suzuki, Hiroyuki 444 (1506) | Lost 1-2 | -171431 |
| 2standard | 420 | Suzuki, Hiroyuki 438 (1482) | Won 2-0 | +191450 |
| 3standard | 500 | Hasegawa, Eita (1497) | Draw 1-1 | +11451 |
| 4standard | 616 | Kamimura, Yohei (1475) | Won 2-0 | +181469 |
| 5standard | 445 | Sasage, Hiroki (1543) | Draw 1-1 | +21471 |
| 6standard | 541 | Wani, Jiroh (1502) | Lost 0-2 | -181453 |
| 7standard | 533 | Matsuura, Tomoaki (1431) | Won 2-0 | +181471 |
| 8standard | 416 | Tsukahara, Kazuto (1608) | Lost 1-2 | -161455 |
| top | average opponent: 1506record: 3-3-2 | new rating: 1455 | ||
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1473 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 587 | Haneda, Daisuke (1738) | Lost 0-2 | -131460 |
| 2sealed | 572 | Onodera, Yusuke (1647) | Won 2-0 | +211481 |
| 3sealed | 576 | Tanaka, Yasuhiro (1651) | Won 2-1 | +211502 |
| 4sealed | 363 | Yamamoto, Hiromu (1518) | Won 2-1 | +191521 |
| 5sealed | 177 | Shibata, Yuuya (1442) | Lost 0-2 | -201501 |
| 6sealed | 594 | Muta, Yutaro (1525) | Lost 0-2 | -171484 |
| 7sealed | 616 | Kagawa, Hajime (1390) | Lost 0-2 | -201464 |
| 8sealed | 518 | Song, Shang (1574) | Lost 1-2 | -161448 |
| top | average opponent: 1561record: 3-5 | new rating: 1448 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1487 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 252 | Osawa, Takuya (1984) | Won 2-0 | +261513 |
| 2standard | 195 | Nakatani, Hiroki (1406) | Lost 0-2 | -191494 |
| 3standard | 950 | Murayama, Terukazu (1529) | Won 2-1 | +181512 |
| 4standard | 427 | Nishi, Eiichi (1468) | Lost 1-2 | -191493 |
| 5standard | 843 | Takano, Kantaro (1379) | Lost 1-2 | -201473 |
| top | average opponent: 1553record: 2-3 | new rating: 1473 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 609 | Aridome, Tomohiro (1910) | Lost 0-2 | -111489 |
| 2standard | 770 | Gladwin, Marianne (1287) | Lost 1-2 | -221467 |
| 3standard | 1199 | Shimazaki, Kazuma (1427) | Won 2-0 | +181485 |
| 4standard | 1099 | Seki, Kojirou (1507) | Lost 0-2 | -181467 |
| 5standard | 1121 | Norito, Ichikawa (1470) | Won 2-0 | +181485 |
| 6standard | 1109 | Wada, Yuusaku (1489) | Won 2-0 | +181503 |
| 7standard | 666 | Suzuki, Tomoyuki (1514) | Lost 0-2 | -181485 |
| 8standard | 859 | Asada, Hiroki (1438) | Won 2-0 | +181503 |
| 9standard | 618 | Yamamoto, Takahiro (1644) | Lost 1-2 | -161487 |
| top | average opponent: 1520record: 4-5 | new rating: 1487 | ||