Iwasaki, Masayuki
Current rating: 1558
Record: 33-28
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1567 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 178 | Inoue, Masanao (1474) | Lost 0-2 | -191548 |
| 2pioneer | 544 | Sato, Tatsumi (1578) | Lost 1-2 | -181530 |
| 3pioneer | 739 | Okosi, Ryouta (1464) | Won 2-0 | +171547 |
| 4pioneer | 758 | Miyasaka, Bon (1468) | Won 2-0 | +171564 |
| 5pioneer | 523 | Ishihama, Naoya (1444) | Won 2-1 | +151579 |
| 6pioneer | 304 | Ogino, Genki (1403) | Lost 0-2 | -211558 |
| top | average opponent: 1472record: 3-3 | new rating: 1558 | ||
| Grand Prix Nagoya 2019 (ELD standard) | starting rating: 1564 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 183 | Kusunoki, Yuki (1735) | Lost 0-2 | -151549 |
| 2standard | 483 | Tahara, Ippei (1503) | Won 2-1 | +171566 |
| 3standard | 595 | Honda, Hiroki 178 (1500) | Won 2-0 | +171583 |
| 4standard | 410 | Yamamoto, Tetsuji (1700) | Won 2-1 | +201603 |
| 5standard | 355 | Suzuki, Takuma (1537) | Lost 0-2 | -191584 |
| 6standard | 519 | Fukudome, Yuu (1670) | Lost 1-2 | -171567 |
| top | average opponent: 1607record: 3-3 | new rating: 1567 | ||
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1588 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 61 | Sugahara, Takuya (1534) | Lost 1-2 | -191569 |
| 2sealed | 628 | Horibe, Yoshifumi (1573) | Lost 0-2 | -181551 |
| 3sealed | 1093 | Yokota, Masaaki (1456) | Won 2-0 | +161567 |
| 4sealed | 781 | Kushida, Takafumi (1463) | Won 2-1 | +161583 |
| 5sealed | 548 | Maruyama, Yuta (1496) | Lost 0-2 | -191564 |
| top | average opponent: 1505record: 2-3 | new rating: 1564 | ||
| Grand Prix Yokohama 2019 (modern) | starting rating: 1652 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 642 | Kayaki, Kazuya (1426) | Lost 0-2 | -221630 |
| 2modern | 961 | Miyawaki, Ryosuke (1480) | Lost 0-2 | -211609 |
| 3modern | 1178 | Nagata, Ryoto (1430) | Lost 1-2 | -211588 |
| top | average opponent: 1446record: 0-3 | new rating: 1588 | ||
| Grand Prix Kyoto 2019 (RNA standard) | starting rating: 1571 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 152 | Kita, Masahiro (1500) | Won 2-0 | +171588 |
| 2standard | 228 | Umezawa, Naoki (1482) | Won 2-1 | +161604 |
| 3standard | 273 | Kobayashi, Yuki9104 (1447) | Won 2-0 | +151619 |
| 4standard | 242 | Yeh, Rueyjer (1624) | Won 2-1 | +181637 |
| 5standard | 15 | Viraseranee, Pakkapong (1516) | Won 2-0 | +161653 |
| 6standard | 30 | Isogaya, Leo (1487) | Lost 1-2 | -211632 |
| 7standard | 152 | Uno, Yuki (1664) | Lost 0-2 | -171615 |
| 8standard | 227 | Fukutani, Mitumasa (1494) | Won 2-0 | +161631 |
| 9standard | 135 | Yabe, Tomoyoshi (1484) | Won 2-0 | +151646 |
| 10standard | 130 | Fujii, Kento (1530) | Won 2-0 | +161662 |
| 11standard | 28 | Saito, Shosuke (1676) | Won 2-1 | +181680 |
| 12standard | 25 | Hori, Masataka (1780) | Lost 0-2 | -161664 |
| 13standard | 79 | Maki, Hidekazu (1713) | Won 2-1 | +191683 |
| 14standard | 34 | Tanahashi, Masayasu (1948) | Lost 0-2 | -141669 |
| 15standard | 72 | Tinen, Kousuke (1689) | Lost 0-2 | -171652 |
| top | average opponent: 1602record: 10-5 | new rating: 1652 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1582 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 532 | Shinagawa, Kazunari (1473) | Lost 0-2 | -201562 |
| 2sealed | 719 | Suzuki, Kento (1454) | Won 2-1 | +161578 |
| 3sealed | 528 | Conti, Christian (1552) | Lost 1-2 | -191559 |
| 4sealed | 891 | Yamashiro, Wataru (1479) | Won 2-0 | +171576 |
| 5sealed | 714 | Kisanuki, Akira (1357) | Won 2-1 | +141590 |
| 6sealed | 623 | Shimizu, Yousuke (1713) | Won 2-0 | +201610 |
| 7sealed | 475 | Uchida, Kensuke (1677) | Won 2-1 | +191629 |
| 8sealed | 332 | Kozakai, Yukio (1712) | Won 2-0 | +201649 |
| 9sealed | 206 | Kato, Jun (1573) | Lost 1-2 | -201629 |
| 10draft | 649 | Soga, Junya (1590) | Lost 1-2 | -181611 |
| 11draft | 644 | Masuyama, Takahiro (1517) | Lost 0-2 | -201591 |
| 12draft | 596 | Terasawa, Yu (1660) | Won 2-1 | +191610 |
| 13draft | 680 | Sawai, Hiroshi (1545) | Lost 0-2 | -191591 |
| 15draft | 578 | Jinno, Kaname (1493) | Lost 0-2 | -201571 |
| top | average opponent: 1557record: 7-7 | new rating: 1571 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 343 | Iino, Ryuji (1590) | Lost 1-2 | -161484 |
| 2sealed | 824 | Kitao, Soujyu (1626) | Lost 1-2 | -161468 |
| 3sealed | 1026 | Ito, Koichi (1446) | Won 2-0 | +181486 |
| 4sealed | 875 | Sasaki, Kazuo (1482) | Won 2-0 | +181504 |
| 5sealed | 761 | Okamoto, Yasutaka (1495) | Won 2-0 | +181522 |
| 6sealed | 542 | Ueda, Takao (1541) | Won 2-1 | +181540 |
| 7sealed | 276 | Smith, Donald (1801) | Lost 0-2 | -131527 |
| 8sealed | 622 | Kashiwase, Kazuya (1666) | Won 2-0 | +201547 |
| 9sealed | 325 | Fukumoto, Takuma (1460) | Won 2-1 | +171564 |
| 10draft | 372 | Wouters, Robin (1576) | Lost 0-2 | -181546 |
| 11draft | 326 | Yao, Shunsuke (1690) | Won 2-0 | +201566 |
| 12draft | 325 | Hiroi, Yuta (1419) | Won 2-0 | +161582 |
| top | average opponent: 1566record: 8-4 | new rating: 1582 | ||