Byun, Chong
Current rating: 1719 (#5380)
Record: 56-39-1 (GP) / 4-4 (professional)
| Grand Prix Phoenix 2020 (pioneer) | starting rating: 1751 | |||
| round | table | opponent (rating) | result | Δrating |
| 2pioneer | 28 | Ziegler, Carson (1466) | Won 2-1 | +131764 |
| 3pioneer | 177 | Molina, Cody (1758) | Lost 1-2 | -181746 |
| 4pioneer | 289 | Jeffries, Richard (1528) | Lost 1-2 | -221724 |
| 5pioneer | 333 | Garcia German, Luis (1500) | Won 2-0 | +141738 |
| 6pioneer | 264 | Neenan, Baker (1665) | Lost 0-2 | -191719 |
| top | average opponent: 1584record: 2-3 | new rating: 1719 | ||
| Players Tour Phoenix 2020 (pioneer) | starting rating: 1749 | |||
| round | table | opponent (rating) | result | Δrating |
| 1draft | 85 | Locke, Steve (1990) | Lost 0-2 | -141735 |
| 2draft | 116 | Zimmerman, Nathan (1805) | Lost 0-2 | -171718 |
| 3draft | 136 | Jacques, Zachary (1649) | Won 2-1 | +171735 |
| 4pioneer | 153 | Fox, Brian (1720) | Lost 1-2 | -181717 |
| 5pioneer | 128 | Baumgarten, Joseph (1597) | Won 2-1 | +161733 |
| 6pioneer | 129 | Sifuentes, Francisco (1799) | Won 2-0 | +191752 |
| 7pioneer | 74 | Cummins, Jack (1405) | Won 2-1 | +121764 |
| 8pioneer | 86 | Pastore, Kellen (2061) | Lost 1-2 | -131751 |
| top | average opponent: 1753record: 4-4 | new rating: 1751 | ||
| Grand Prix Seattle 2019 (MH1 limited) | starting rating: 1717 | |||
| round | table | opponent (rating) | result | Δrating |
| A1sealed | 456 | Bailey, Phillip (1473) | Won 2-0 | +131730 |
| A2sealed | 307 | Pei, Eric (1921) | Won 2-0 | +221752 |
| A3sealed | 94 | Sun, Allen (1724) | Lost 0-2 | -191733 |
| A4sealed | 245 | Doberne, David (1713) | Won 2-0 | +181751 |
| A5sealed | 105 | Lew, Al (1531) | Won 2-1 | +141765 |
| A6sealed | 66 | Heal, John (1518) | Won 2-1 | +131778 |
| A7sealed | 46 | Burk, Eliot (1583) | Lost 1-2 | -211757 |
| A8sealed | 116 | Feeman, Dylan (1800) | Won 2-1 | +191776 |
| A9sealed | 482 | Grant, Bradford (1746) | Won 2-0 | +171793 |
| draft | 66 | Anderson, Ethan (1639) | Lost 1-2 | -211772 |
| draft | 63 | Davoudi, Mani (1913) | Lost 1-2 | -151757 |
| draft | 59 | Weinreich, Brian (1730) | Lost 0-2 | -191738 |
| draft | 162 | Engelhard, Eric (1674) | Lost 0-2 | -191719 |
| draft | 153 | Greenwell-Baker, Dustyn (1559) | Won 2-1 | +151734 |
| draft | 130 | Montano, Jeremy (1535) | Won 2-0 | +151749 |
| top | average opponent: 1671record: 9-6 | new rating: 1749 | ||
| Grand Prix Vancouver 2018 (UMA limited) | starting rating: 1723 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 95 | Hung, Frank (1500) | Won 2-0 | +141737 |
| 2sealed | 36 | Smith, Clarke (1500) | Won 2-0 | +141751 |
| 3sealed | 41 | Fairbanks, Robert (1683) | Lost 1-2 | -191732 |
| 4sealed | 137 | Langford, Chris (1420) | Won 2-0 | +121744 |
| 5sealed | 163 | Annand, Benjamin (1582) | Lost 1-2 | -211723 |
| 6sealed | 133 | Campbell, Spence (1536) | Won 2-0 | +151738 |
| 7sealed | 149 | Fonseka, Aruna (1545) | Lost 0-2 | -211717 |
| top | average opponent: 1538record: 4-3 | new rating: 1717 | ||
| Grand Prix Portland 2018 (modern) | starting rating: 1773 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 92 | Troschinetz, Amy (1500) | Lost 0-2 | -231750 |
| 4modern | 409 | Carson, Dawson (1665) | Lost 1-2 | -191731 |
| 5modern | 518 | Bevans, Alex (1481) | Won 2-1 | +131744 |
| 6modern | 395 | Vajda, Derek (1597) | Lost 1-2 | -211723 |
| top | average opponent: 1561record: 1-3 | new rating: 1723 | ||
| Grand Prix Seattle 2018 (standard) (RIX standard) | starting rating: 1701 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 97 | Zamora, Nathan (1768) | Won 2-0 | +191720 |
| 3standard | 126 | Mei, Mike Songhao (1630) | Won 2-1 | +171737 |
| 4standard | 70 | Asbjornsen, Chad (1711) | Lost 1-2 | -191718 |
| 5standard | 299 | Christensen, Trevor (1630) | Won 2-0 | +171735 |
| 6standard | 138 | Grandjambe, Travis (1667) | Lost 0-2 | -191716 |
| 7standard | 274 | Longlais, Lucien (1766) | Won 2-1 | +181734 |
| 8standard | 112 | Kim, Austin (1690) | Won 2-0 | +181752 |
| 9standard | 1119 | Grimes, Sean (1581) | Won 2-1 | +151767 |
| 10standard | 1073 | Grant, Noah (1606) | Won 2-1 | +151782 |
| 11standard | 1048 | Omori, Ken'ichirou (1895) | Won 2-1 | +201802 |
| 12standard | 1024 | Chronopoulos, Bill (2047) | Lost 1-2 | -141788 |
| 13standard | 1036 | Goodwin, Luke (1947) | Lost 0-2 | -151773 |
| 14standard | 1075 | Kiefer, Jack (1957) | Lost 0-2 | -151758 |
| 15standard | 1071 | Nelson, James (1571) | Won 2-0 | +151773 |
| top | average opponent: 1748record: 9-5 | new rating: 1773 | ||
| Grand Prix Portland 2017 (XLN standard) | starting rating: 1656 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 78 | Gross, Mitchell (1780) | Lost 0-2 | -161640 |
| 3standard | 593 | Egen, Taylor (1578) | Lost 0-2 | -191621 |
| 4standard | 667 | Cox, Jay (1481) | Won 2-0 | +151636 |
| 5standard | 591 | Grossmann, Ben (1497) | Won 2-0 | +161652 |
| 6standard | 390 | Lee, Farand (1854) | Lost 1-2 | -151637 |
| 7standard | 378 | Brown, Joel (1457) | Won 2-0 | +151652 |
| 8standard | 252 | McCumber, James (1525) | Won 2-1 | +161668 |
| 9standard | 210 | Ridgeway, Eric (1491) | Won 2-0 | +151683 |
| 10standard | 204 | Im, Hannah (1567) | Draw 1-1 | -31680 |
| 11standard | 148 | Tabrizi, Shawn (1822) | Won 2-0 | +211701 |
| 12standard | 100 | Mandelblatt, Zach (1887) | Lost 0-2 | -151686 |
| 13standard | 134 | Fincher, Lee (1514) | Won 2-0 | +151701 |
| top | average opponent: 1621record: 7-4-1 | new rating: 1701 | ||
| Grand Prix Vancouver 2017 (modern) | starting rating: 1662 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 2011 | Knezevich, Blake (1598) | Lost 1-2 | -191643 |
| 2modern | 2611 | Herman, Jeff (1490) | Lost 1-2 | -211622 |
| 3modern | 2688 | Mann, Brandon (1465) | Won 2-1 | +151637 |
| 4modern | 2620 | Prakash, Lokesh (1419) | Lost 1-2 | -221615 |
| 5modern | 2668 | Hoskins, Nicholas (1432) | Won 2-0 | +151630 |
| 6modern | 2527 | Zuch, Chris (1482) | Won 2-0 | +151645 |
| 7modern | 2362 | Green, Marcell (1385) | Won 2-0 | +131658 |
| 8modern | 2268 | Christie, Matthew (1519) | Won 2-0 | +161674 |
| 9modern | 2198 | Slutsky, Simon (1660) | Lost 1-2 | -181656 |
| top | average opponent: 1494record: 5-4 | new rating: 1656 | ||
| Grand Prix Portland 2016 (EMN standard) | starting rating: 1527 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 487 | Ortiz, Sam (1450) | Won 2-0 | +171544 |
| 2standard | 316 | Bloodworth, Casey (1491) | Lost 1-2 | -191525 |
| 3standard | 428 | Paiz, Robert (1449) | Lost 1-2 | -201505 |
| 4standard | 674 | Tweedy, Don (1331) | Won 2-0 | +151520 |
| 5standard | 457 | Juarez, Stephanie (1498) | Won 2-0 | +181538 |
| 6standard | 357 | Nguyen, Henry (1499) | Won 2-0 | +171555 |
| 7standard | 317 | Egashira, Kenji (1850) | Lost 0-2 | -131542 |
| 8standard | 350 | May, Daniel (1484) | Won 2-0 | +171559 |
| 9standard | 181 | Yang, Xiao Yu (Roy) (1702) | Won 0-0 | +211580 |
| 10standard | 189 | Chembars, Richard (1573) | Won 2-0 | +181598 |
| 11standard | 77 | Basham, Brian (1578) | Won 2-1 | +171615 |
| 12standard | 60 | Miller, William (1621) | Won 2-1 | +181633 |
| 13standard | 53 | Goldman-Kirst, Martin (1955) | Won 2-1 | +241657 |
| 14standard | 20 | Cua, Paolo (1775) | Lost 0-2 | -161641 |
| 15standard | 65 | Aguilera, Ryder (1779) | Won 2-1 | +211662 |
| top | average opponent: 1602record: 11-4 | new rating: 1662 | ||
| Grand Prix Vancouver 2016 (OGW limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 542 | Perales, Nicholas (1480) | Won 2-1 | +181518 |
| 2sealed | 404 | Woolley, Tyler (1723) | Lost 0-2 | -151503 |
| 3sealed | 718 | Key, Aaron (1499) | Won 0-0 | +181521 |
| 4sealed | 407 | Nadeau, Branden (1482) | Won 2-0 | +181539 |
| 5sealed | 285 | Besta, Kevin (1522) | Lost 0-2 | -191520 |
| 6sealed | 444 | Pauley, Adam (1520) | Won 2-0 | +181538 |
| 7sealed | 294 | Ukryn, Daniel (1531) | Lost 1-2 | -181520 |
| 8sealed | 396 | DiMaggio, Matthew (1631) | Won 2-1 | +201540 |
| 9sealed | 251 | Bakkala, Tony (1537) | Won 2-0 | +181558 |
| 10draft | 184 | ZhouCharles, Brandon (1557) | Won 2-1 | +181576 |
| 11draft | 50 | Calica, Robert (1581) | Lost 0-2 | -181558 |
| 12draft | 146 | Goddard, Maxwell (1700) | Lost 0-2 | -151543 |
| 13draft | 41 | Haraguchi, Yoshio (1657) | Lost 0-2 | -161527 |
| 14draft | 33 | Milligan, Eric (1522) | Lost 1-2 | -181509 |
| 15draft | 32 | Carranza, Jaime (1524) | Won 2-0 | +181527 |
| top | average opponent: 1564record: 8-7 | new rating: 1527 | ||