Son, Dong-il
Current rating: 1563
Record: 16-14-3
| Grand Prix Bangkok 2019 (ELD limited) | starting rating: 1493 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 191 | Shunglor, Pakpoom (1598) | Lost 1-2 | -161477 |
| 2sealed | 225 | Poldsam, Ismo (1682) | Draw 1-1 | +31480 |
| 3sealed | 340 | Kim, Tae Myeong (1487) | Won 2-0 | +181498 |
| 4sealed | 277 | Toh, Rui Huang (1552) | Won 2-0 | +191517 |
| 5sealed | 192 | Kukino, Yudai (1508) | Won 2-0 | +181535 |
| 6sealed | 123 | Kawakami, Takehito (1891) | Lost 0-2 | -121523 |
| 7sealed | 171 | Li, Duoyan (1761) | Won 2-0 | +231546 |
| 8sealed | 118 | Zhang, Daniel [SGP] (1494) | Won 2-1 | +171563 |
| top | average opponent: 1622record: 5-2-1 | new rating: 1563 | ||
| Grand Prix Yokohama 2019 (modern) | starting rating: 1492 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 149 | Kurauchi, Keisuke (1481) | Won 2-0 | +181510 |
| 2modern | 525 | Kurata, Yoshihiko (1525) | Draw 1-1 | 01510 |
| 3modern | 555 | Nakahara, Daichi (1516) | Won 2-0 | +181528 |
| 4modern | 277 | Kurita, Yudai (1653) | Lost 0-2 | -161512 |
| 5modern | 543 | Mitoya, Taku (1518) | Lost 0-2 | -171495 |
| 6modern | 739 | Nakata, Kohki (1502) | Won 2-1 | +181513 |
| 7modern | 529 | Takiguchi, Itsuki (1416) | Draw 1-1 | -21511 |
| 8modern | 552 | Naka, Yuuji (1499) | Lost 1-2 | -181493 |
| top | average opponent: 1514record: 3-3-2 | new rating: 1493 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 264 | Okada, Takuya 2317 (1500) | Lost 0-2 | -181465 |
| 2sealed | 853 | Eto, Junpei (1432) | Won 2-0 | +181483 |
| 3sealed | 641 | Tsuruta, Tatsunori (1524) | Won 2-1 | +191502 |
| 4sealed | 489 | Shimokobe, Yukihiro (1516) | Won 2-1 | +181520 |
| 5sealed | 413 | Omiya, Takahiro (1645) | Won 2-0 | +201540 |
| 6sealed | 242 | Tsujikawa, Taiga (1719) | Lost 0-2 | -151525 |
| 7sealed | 210 | Odagiri, Mato (1564) | Lost 0-2 | -171508 |
| 8sealed | 402 | Fujimori, Masayoshi (1616) | Lost 0-2 | -161492 |
| top | average opponent: 1564record: 4-4 | new rating: 1492 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 259 | Yasumoto, Naoki (1461) | Lost 0-2 | -191481 |
| 2modern | 847 | Uchiyama, Daichi (1402) | Lost 1-2 | -191462 |
| 3modern | 1270 | Nakazawa, Koutarou (1392) | Won 2-0 | +171479 |
| 4modern | 1043 | Kusakabe, Kyohei (1717) | Won 2-0 | +221501 |
| 5modern | 1041 | Takenaga, Tomohiro (1527) | Lost 0-2 | -181483 |
| 6modern | 1123 | Suzuki, Ryuuichi (1303) | Won 2-0 | +151498 |
| 7modern | 819 | Yamashita, Yoshiki (1428) | Lost 0-2 | -191479 |
| 8modern | 818 | Fukuda, Yoshifumi (1458) | Won 2-0 | +171496 |
| 9modern | 723 | Nose, Koji (1761) | Lost 0-2 | -131483 |
| top | average opponent: 1494record: 4-5 | new rating: 1483 | ||