Ishizeki, Masaki
Current rating: 1532
Record: 20-18
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1553 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 502 | Kodama, Kentaro (1509) | Lost 0-2 | -191534 |
| 3sealed | 674 | Bean, Byron (1511) | Lost 1-2 | -191515 |
| 4sealed | 952 | Noguchi, Takeshi (1465) | Won 2-1 | +171532 |
| 5sealed | 649 | Jirkal, Tomas (1639) | Lost 0-2 | -161516 |
| 6sealed | 711 | Sugiyama, Kouichi (1394) | Won 2-0 | +161532 |
| 7sealed | 536 | Jia, Jie (1560) | Lost 0-2 | -171515 |
| 8sealed | 505 | Ito, Shingo (1465) | Won 2-0 | +171532 |
| top | average opponent: 1506record: 3-4 | new rating: 1532 | ||
| Grand Prix Yokohama 2019 (modern) | starting rating: 1552 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 122 | Niu, Yaoqi (1469) | Lost 0-2 | -201532 |
| 2modern | 743 | Takahashi, Naohiro (1470) | Won 2-0 | +171549 |
| 3modern | 877 | Okuhira, Yoshihisa (1475) | Won 2-0 | +171566 |
| 4modern | 388 | Qin, Xiaoqi (1722) | Lost 1-2 | -161550 |
| 5modern | 878 | Marumo, Tsubasa (1537) | Won 2-0 | +181568 |
| 6modern | 424 | Iwashita, Shuta (1514) | Won 2-0 | +171585 |
| 7modern | 474 | Umetani, Hideo (1719) | Lost 0-2 | -151570 |
| 8modern | 452 | Yoshimori, Sho (1624) | Lost 0-2 | -171553 |
| top | average opponent: 1566record: 4-4 | new rating: 1553 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1598 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 413 | Matsumura, Hayato (1500) | Won 2-0 | +161614 |
| 2standard | 553 | Ohnishi, Jyunpei (1869) | Lost 0-2 | -141600 |
| 3standard | 875 | Wada, Kazumasa (1440) | Lost 0-2 | -201580 |
| 4standard | 1011 | Umi, Hirokazu (1602) | Won 2-1 | +181598 |
| 5standard | 872 | Amemiya, Kouhei (1436) | Lost 0-2 | -211577 |
| 6standard | 825 | Yokoyama, Takaya (1582) | Lost 0-2 | -181559 |
| 7standard | 802 | Yoda, Daichi (1392) | Lost 1-2 | -211538 |
| 8standard | 738 | Sasaki, Hideya (1286) | Won 2-0 | +141552 |
| top | average opponent: 1513record: 3-5 | new rating: 1552 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 745 | Takekiyo, Koji (1346) | Won 2-1 | +151515 |
| 2sealed | 15 | Ookawa, Yuusuke (1602) | Lost 0-2 | -161499 |
| 3sealed | 669 | Sato, Koichiro (1555) | Won 2-0 | +191518 |
| 4sealed | 467 | Kashima, Yuuki (1516) | Lost 1-2 | -181500 |
| 5sealed | 532 | Ishiwata, Kouichi (1640) | Won 2-0 | +201520 |
| 6sealed | 703 | Shimura, Takeshi (1307) | Won 2-0 | +141534 |
| 7sealed | 399 | Sugiyama, Syun (1567) | Won 2-1 | +191553 |
| 8sealed | 240 | Masui, Norioki (1517) | Won 2-0 | +171570 |
| 9sealed | 114 | Machida, Takahiro (1789) | Lost 1-2 | -141556 |
| 10draft | 742 | Zhang, Yicheng (1541) | Won 2-1 | +181574 |
| 11draft | 679 | Shingo, Tanaka (1612) | Lost 0-2 | -171557 |
| 12draft | 733 | Tsukamoto, Mitsuru (1733) | Won 2-1 | +211578 |
| 13draft | 675 | Taira, Kentaro (1576) | Won 2-0 | +181596 |
| 14draft | 650 | Ishizaki, Yoshiki (1656) | Lost 0-2 | -171579 |
| 15draft | 644 | Iino, Ryuji (1612) | Won 2-1 | +191598 |
| top | average opponent: 1571record: 10-5 | new rating: 1598 | ||