Iwata, Seiya
Current rating: 1375
Record: 17-28
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1320 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 421 | Tamura, Youhei6302 (1407) | Won 2-1 | +201340 |
| 2pioneer | 349 | Mori, Yuki (1344) | Lost 1-2 | -181322 |
| 3pioneer | 703 | Tanaka, Nobuaki (1491) | Won 2-1 | +211343 |
| 4pioneer | 550 | Hattori, Kazuki (1557) | Lost 1-2 | -141329 |
| 5pioneer | 507 | Yamagishi, Yusuke (1516) | Won 2-1 | +211350 |
| 6pioneer | 326 | Kataoka, Kousuke (1519) | Won 2-0 | +211371 |
| 7pioneer | 275 | Tanaka, Shun (1449) | Won 2-1 | +191390 |
| 8pioneer | 175 | Arakawa, Tomohiro (1536) | Lost 1-2 | -151375 |
| top | average opponent: 1478record: 5-3 | new rating: 1375 | ||
| Grand Prix Nagoya 2019 (ELD standard) | starting rating: 1374 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 424 | Yamashiro, Junji (1494) | Lost 1-2 | -161358 |
| 2standard | 449 | Imai, Kouta (1482) | Lost 1-2 | -151343 |
| 3standard | 781 | Yamamoto, Takashi (1423) | Lost 0-2 | -171326 |
| 4standard | 811 | Kagami, Chisei (1414) | Lost 0-2 | -161310 |
| 5standard | 786 | Katayama, Kojiro (1424) | Won 2-1 | +201330 |
| 6standard | 705 | Kamezawa, Yoshifumi (1336) | Won 2-1 | +181348 |
| 7standard | 584 | Uehara, Shingo (1460) | Lost 1-2 | -161332 |
| 8standard | 515 | Ishimaru, Ken (1677) | Lost 0-2 | -121320 |
| top | average opponent: 1464record: 2-6 | new rating: 1320 | ||
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1346 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 490 | Miyata, Yuuya (1619) | Won 2-0 | +231369 |
| 2sealed | 32 | Sashida, Tomoro (1630) | Won 2-1 | +231392 |
| 3sealed | 446 | Kimura, Kazuki (1711) | Lost 0-2 | -131379 |
| 4sealed | 688 | Tamano, Yuuki (1504) | Lost 0-2 | -161363 |
| 5sealed | 699 | Furukawa, Jun (1422) | Won 2-0 | +201383 |
| 6sealed | 347 | Sasaki, Tsutomu (1574) | Lost 1-2 | -151368 |
| 7sealed | 530 | Ebihara, Hirotaka (1694) | Won 2-0 | +241392 |
| 8sealed | 438 | Tsunoda, Masaki (1419) | Lost 0-2 | -181374 |
| top | average opponent: 1572record: 4-4 | new rating: 1374 | ||
| Grand Prix Kyoto 2019 (RNA standard) | starting rating: 1416 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 50 | Surangsrirat, Khumpon (1414) | Lost 0-2 | -181398 |
| 2standard | 737 | Gouda, Fumito (1395) | Lost 0-2 | -181380 |
| 3standard | 937 | Kamezawa, Yoshifumi (1392) | Lost 0-2 | -171363 |
| 4standard | 943 | Sugita, Toshio (1445) | Lost 0-2 | -171346 |
| top | average opponent: 1412record: 0-4 | new rating: 1346 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1486 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 197 | Sano, Satoki (1500) | Lost 0-2 | -181468 |
| 2sealed | 600 | Mizuno, Shiori (1386) | Won 2-0 | +171485 |
| 3sealed | 959 | Yajima, Tatsuaki (1632) | Lost 0-2 | -151470 |
| 4sealed | 900 | Yamanaka, Shouki (1468) | Lost 0-2 | -191451 |
| 5sealed | 1005 | Matsushima, Tsutomu (1462) | Lost 1-2 | -171434 |
| 6sealed | 872 | Nishina, Akihiko (1445) | Lost 1-2 | -181416 |
| 7sealed | 748 | Sano, Masayo (1434) | Won 2-1 | +181434 |
| 8sealed | 607 | Okita, Akito (1447) | Lost 1-2 | -181416 |
| top | average opponent: 1472record: 2-6 | new rating: 1416 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 420 | Toyoda, Takahiro (1499) | Lost 1-2 | -181482 |
| 2sealed | 698 | Kimura, Ryou (1595) | Lost 1-2 | -161466 |
| 3sealed | 1030 | Hakozaki, Yuta (1464) | Won 2-0 | +181484 |
| 4sealed | 918 | Katagiri, Kazushi (1687) | Lost 0-2 | -141470 |
| 5sealed | 944 | Matsushima, Keigo (1466) | Won 2-0 | +181488 |
| 6sealed | 872 | Takano, Hayato (1478) | Lost 1-2 | -191469 |
| 7sealed | 886 | Taniwaki, Hikaru (1468) | Won 2-0 | +181487 |
| 8sealed | 690 | Hanyuu, Kento (1458) | Lost 0-2 | -181469 |
| 9sealed | 660 | Yoshimura, Asuka (1428) | Won 2-0 | +171486 |
| top | average opponent: 1505record: 4-5 | new rating: 1486 | ||