Chang, Yul
Current rating: 1539
Record: 17-19-1
| Grand Prix Krakow 2019 (M20 limited) | starting rating: 1425 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 169 | Cofalik, Szymon (1674) | Won 2-0 | +231448 |
| 4sealed | 67 | Zubovich, Stanislau (1723) | Lost 0-2 | -131435 |
| 5sealed | 145 | Hummel, Konstantin (1496) | Won 2-0 | +191454 |
| 6sealed | 75 | Jezewski, Joshua (1646) | Won 2-1 | +211475 |
| 7sealed | 186 | Jeric, Lovro (1479) | Lost 1-2 | -181457 |
| 8sealed | 279 | Bankewicz, Tomasz (1515) | Won 2-0 | +191476 |
| 9sealed | 405 | Ellingsen, Mats (1908) | Lost 0-2 | -101466 |
| 10draft | 374 | Thormahlen, Bruno (1810) | Lost 1-2 | -121454 |
| 11draft | 336 | Fabiani, Roberto (1607) | Won 2-1 | +201474 |
| 12draft | 352 | Panchartek, Zbysek (1821) | Won 2-0 | +251499 |
| 13draft | 332 | Zimmermann, Bob (1478) | Won 2-0 | +171516 |
| 14draft | 330 | Boczarski, Rafal (1584) | Won 2-0 | +191535 |
| 15draft | 331 | Jaman, Bruno (1746) | Draw 1-1 | +41539 |
| top | average opponent: 1653record: 8-4-1 | new rating: 1539 | ||
| Grand Prix Prague 2019 (UMA limited) | starting rating: 1428 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 787 | Babych, Iurii (1918) | Lost 0-2 | -91419 |
| 3sealed | 707 | Vallone, Antonio (1482) | Lost 0-2 | -171402 |
| 4sealed | 903 | Timonen, Jussi (1702) | Won 2-1 | +231425 |
| top | average opponent: 1701record: 1-2 | new rating: 1425 | ||
| Grand Prix Prague 2018 (modern) | starting rating: 1433 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 317 | Hosszu, Ervin (1605) | Lost 0-2 | -151418 |
| 3modern | 786 | Locher, Benjamin (1539) | Won 2-1 | +211439 |
| 4modern | 508 | Van Doesburg, Steven (1558) | Lost 1-2 | -161423 |
| 5modern | 667 | Been, Iso (1784) | Lost 0-1 | -121411 |
| 6modern | 692 | Greppmair, Michael (1483) | Lost 1-2 | -171394 |
| 7modern | 675 | Brocker, Herve (1440) | Won 2-0 | +191413 |
| 8modern | 562 | Kecke, Paul (1257) | Won 2-1 | +151428 |
| top | average opponent: 1524record: 3-4 | new rating: 1428 | ||
| Grand Prix Turin 2018 (M19 limited) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 51 | Simonin, Romain (1537) | Won 2-0 | +191501 |
| 3sealed | 255 | Erjavec, Jure (1508) | Lost 0-2 | -181483 |
| 4sealed | 332 | Minelli, Steven (1656) | Lost 0-2 | -151468 |
| 5sealed | 277 | Cremaschi, Daniele (1448) | Lost 0-2 | -181450 |
| 6sealed | 332 | Duport, Olivier (1523) | Lost 0-2 | -171433 |
| top | average opponent: 1534record: 1-4 | new rating: 1433 | ||
| Grand Prix Prague 2017 (AER limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 537 | Romanczyk, Peter (1556) | Won 2-1 | +191519 |
| 2sealed | 295 | Schiano Di Scioarro, Vincenzo (1534) | Lost 1-2 | -181501 |
| 3sealed | 478 | Kovarik, Ondrej (1457) | Lost 0-2 | -191482 |
| 4sealed | 825 | Knap, Cestmir (1387) | Won 2-0 | +171499 |
| 5sealed | 519 | Leroy, Quentin 7172 (1510) | Lost 1-2 | -181481 |
| 6sealed | 760 | Duchesne, Pierre (1456) | Lost 0-2 | -191462 |
| 7sealed | 703 | Bangsbostrand, Mads Robert (1394) | Won 2-1 | +171479 |
| 8sealed | 628 | Smyl, Daniel (1490) | Won 2-0 | +181497 |
| 9sealed | 532 | Steinaa, Daniel (1648) | Lost 1-2 | -151482 |
| top | average opponent: 1492record: 4-5 | new rating: 1482 | ||