Choi, Dongguen
Current rating: 1502
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 38 | Hasegawa, Gaku (1580) | Won 2-1 | +201502 |
| 2sealed | 335 | Hiyoshi, Daisuke (1612) | Lost 0-2 | -161486 |
| 3sealed | 683 | Tomiyama, Shin (1381) | Won 2-0 | +161502 |
| top | average opponent: 1524record: 2-1 | new rating: 1502 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 46 | Kobayashi, Toshio (1469) | Won 2-0 | +181482 |
| 2sealed | 275 | Senshuu, Yoshinori (1765) | Won 2-0 | +231505 |
| 3sealed | 249 | Ootani, Yousuke (1545) | Lost 0-2 | -171488 |
| 4sealed | 414 | Kobayashi, Tatsurou (1581) | Won 2-0 | +191507 |
| 5sealed | 340 | D'Aniello, Carmine (1881) | Lost 0-2 | -111496 |
| 6sealed | 385 | Urasawa, Taiji (1743) | Lost 0-2 | -141482 |
| top | average opponent: 1664record: 3-3 | new rating: 1482 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1219 | Itou, Tai (1581) | Lost 0-2 | -171483 |
| 2sealed | 1382 | Urano, Tomohisa (1384) | Lost 0-2 | -191464 |
| 3sealed | 1337 | Jenvold, Christiern (1467) | Lost 1-2 | -181446 |
| 4sealed | 1287 | Ota, Yoshio (1446) | Won 2-1 | +181464 |
| top | average opponent: 1469record: 1-3 | new rating: 1464 | ||