Ishii, Kazuki
Current rating: 1260
| Grand Prix Yokohama 2019 (modern) | starting rating: 1351 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 57 | Yu, Weilong (1747) | Lost 0-2 | -121339 |
| 2modern | 730 | Jono, Rei (1480) | Lost 1-2 | -151324 |
| 3modern | 1091 | Nakayama, Kenichi (1426) | Lost 0-2 | -161308 |
| 4modern | 1180 | Ushijima, Syun (1426) | Lost 1-2 | -161292 |
| 5modern | 1106 | Nagase, Yuuichi (1250) | Lost 0-2 | -191273 |
| 6modern | 970 | Fujita, Kenichi (1553) | Lost 1-2 | -131260 |
| top | average opponent: 1480record: 0-6 | new rating: 1260 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1410 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 29 | Taniguchi, Kenta (1484) | Lost 1-2 | -161394 |
| 2sealed | 797 | Saito, Ryoichiro (1509) | Won 2-1 | +201414 |
| 3sealed | 722 | Kikuchi, Kouhei (1587) | Lost 1-2 | -151399 |
| 4sealed | 893 | Ito, Chihiro (1482) | Lost 1-2 | -171382 |
| 5sealed | 998 | Tada, Hidenobu (1481) | Lost 1-2 | -161366 |
| 6sealed | 980 | Wan, James (1491) | Lost 0-2 | -151351 |
| top | average opponent: 1506record: 1-5 | new rating: 1351 | ||
| Grand Prix Kitakyushu 2013 (M14 standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 259 | Shiba, Naoto (1523) | Lost 1-2 | -181482 |
| 2standard | 351 | Sugisawa, Tsuyoshi (1572) | Lost 0-2 | -161466 |
| 3standard | 505 | Ishifuro, Yuichi (1464) | Lost 0-2 | -181448 |
| 4standard | 540 | Kita, Takuya (1451) | Lost 0-2 | -181430 |
| 5standard | 522 | Sugita, Daichi (1564) | Won 2-1 | +201450 |
| 6standard | 456 | Maeda, Takayuki (1302) | Won 2-0 | +161466 |
| 7standard | 384 | Ono, Koutarou (1395) | Lost 1-2 | -191447 |
| 8standard | 339 | Lahtela, Samu (1445) | Lost 0-2 | -191428 |
| 9standard | 302 | Yamanouchi, Yuki (1426) | Lost 1-2 | -181410 |
| top | average opponent: 1460record: 2-7 | new rating: 1410 | ||