Ma, Jack
Current rating: 1769 (#3130)
Record: 74-55-7
Grand Prix Hong Kong 2015Grand Prix Nagoya 2016Grand Prix New York 2016Grand Prix Pittsburgh 2016Grand Prix Montreal 2016Grand Prix Atlanta 2016Grand Prix Providence 2016Grand Prix Shizuoka 2017Grand Prix Denver 2017Grand Prix New Jersey 2017 (lim)Grand Prix New Jersey 2019Grand Prix Cleveland 2019Grand Prix Washington DC 2019Grand Prix Chiba 2019
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1837 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 486 | Nomura, Tsuyoshi (1820) | Lost 0-2 | -181819 |
| 3sealed | 781 | Kanda, Shigeru (1403) | Lost 1-2 | -251794 |
| 4sealed | 943 | Nakamoto, Takahiro (1399) | Lost 0-2 | -251769 |
| top | average opponent: 1540record: 0-3 | new rating: 1769 | ||
| Grand Prix Washington DC 2019 (MH1 limited) | starting rating: 1818 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 187 | Rafferty, Colin (1458) | Won 0-0 | +121830 |
| 3sealed | 239 | Van Vaals, Michael (2021) | Won 2-1 | +211851 |
| 4sealed | 54 | Tabash, Nadher (1616) | Won 2-0 | +141865 |
| 5sealed | 20 | Tam, Gary (1552) | Won 2-0 | +131878 |
| 6sealed | 7 | Tomajko, Oliver (2030) | Draw 1-1 | +21880 |
| 7sealed | 17 | Cotrupe, Matthew (1789) | Lost 0-2 | -191861 |
| 8sealed | 58 | Gardiner, James (1559) | Lost 1-2 | -241837 |
| top | average opponent: 1718record: 4-2-1 | new rating: 1837 | ||
| Grand Prix Cleveland 2019 (RNA limited) | starting rating: 1704 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 124 | Rhodes, Brett (1500) | Lost 0-2 | -211683 |
| 2sealed | 312 | Bragg, Kyle (1516) | Won 2-0 | +151698 |
| 3sealed | 393 | Downing, Ian (1471) | Won 2-1 | +141712 |
| 4sealed | 356 | Shapiro, Alec (1512) | Won 2-1 | +141726 |
| 5sealed | 237 | Lim, Ernest (1872) | Won 2-0 | +211747 |
| 6sealed | 92 | Pernankil, Avenash (1887) | Won 2-0 | +201767 |
| 7sealed | 50 | RICH, ANTHONY (1575) | Won 2-1 | +151782 |
| 8sealed | 44 | Belfatto, Michael (1660) | Lost 1-2 | -211761 |
| 9sealed | 115 | Smock, Devin (1606) | Won 2-1 | +161777 |
| 10draft | 112 | Nice Jr, Daniel (1603) | Draw 1-1 | -41773 |
| 11draft | 18 | McKee, Thomas (1822) | Won 2-0 | +191792 |
| 12draft | 79 | Walter, Christopher (1536) | Won 2-0 | +141806 |
| 13draft | 77 | Nice Jr, Daniel (1647) | Lost 0-2 | -211785 |
| 14draft | 67 | Staudinger, Gregory (1626) | Won 2-0 | +151800 |
| 15draft | 65 | Rodriguez, Miles (1814) | Won 2-0 | +181818 |
| top | average opponent: 1643record: 11-3-1 | new rating: 1818 | ||
| Grand Prix New Jersey 2019 (RNA limited) | starting rating: 1763 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 396 | Kurz, Kyle (1580) | Lost 1-2 | -211742 |
| 2sealed | 416 | Paci, Joseph (1482) | Lost 0-2 | -231719 |
| 3sealed | 625 | Cassin, Jeff (1458) | Lost 0-2 | -221697 |
| 4sealed | 625 | Wheatley, Ryan (1448) | Won 2-1 | +131710 |
| 5sealed | 553 | Harder, Brendan (1467) | Won 2-0 | +141724 |
| 6sealed | 433 | Fox Jr, Joe (1638) | Lost 0-2 | -201704 |
| top | average opponent: 1512record: 2-4 | new rating: 1704 | ||
| Grand Prix New Jersey 2017 (lim) (XLN limited) | starting rating: 1775 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 100 | Cohen, Adam (1711) | Lost 0-2 | -191756 |
| 4sealed | 249 | Pogorzhelsky, Alessandro (1682) | Lost 1-2 | -191737 |
| 5sealed | 301 | Cochran, Hunter (1989) | Won 2-1 | +221759 |
| 6sealed | 298 | Blondon, William (1581) | Won 2-1 | +151774 |
| 7sealed | 160 | Wadolowski, Thomas (1564) | Draw 1-1 | -41770 |
| 8sealed | 178 | Rothkopf, Michael (1604) | Won 2-0 | +151785 |
| 9sealed | 118 | DiIorio, Dan (1549) | Lost 0-2 | -221763 |
| top | average opponent: 1669record: 3-3-1 | new rating: 1763 | ||
| Grand Prix Denver 2017 (HOU standard) | starting rating: 1733 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 216 | Gander, Spencer (1566) | Lost 0-2 | -211712 |
| 4standard | 204 | Blackwood, Andrew (1505) | Lost 1-2 | -211691 |
| 5standard | 389 | Wills, Brandon (1499) | Won 2-0 | +141705 |
| 6standard | 252 | Thompson-Exner, Gavin (1619) | Won 2-1 | +171722 |
| 7standard | 193 | Voss, Zach (1831) | Won 2-0 | +201742 |
| 8standard | 95 | Porchas, Justin (1493) | Won 2-0 | +131755 |
| 9standard | 42 | Smith, Nathaniel (2028) | Draw 1-1 | +51760 |
| 10standard | 74 | Mallow, Vince (1735) | Lost 0-2 | -191741 |
| 11standard | 124 | Williams, James (1674) | Draw 1-1 | -11740 |
| 12standard | 145 | Nam, Kyung-Min (1603) | Won 2-1 | +161756 |
| 13standard | 113 | Hardy, Fredrick (1575) | Won 2-1 | +141770 |
| 14standard | 85 | Laughlin, Pierson (1895) | Won 2-1 | +211791 |
| 15standard | 60 | Doberne, David (1940) | Lost 0-2 | -161775 |
| top | average opponent: 1689record: 7-4-2 | new rating: 1775 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1733 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 413 | Yamada, Akinori (1500) | Won 2-0 | +141747 |
| 4standard | 324 | Sia, Pei Ren (1634) | Won 2-1 | +161763 |
| 5standard | 150 | Matsubara, Ichiro (1745) | Lost 0-2 | -191744 |
| 6standard | 303 | Saito, Yuki (1629) | Won 2-0 | +161760 |
| 7standard | 111 | Maruyama, Satoshi (1601) | Lost 0-2 | -211739 |
| 8standard | 310 | Lee, Alan (1618) | Won 2-0 | +161755 |
| 9standard | 143 | Mitsunaga, Yuki (1524) | Won 2-1 | +141769 |
| 10standard | 80 | Miyake, Kyohei (1911) | Lost 1-2 | -151754 |
| 11standard | 171 | Kobayashi, Kazutaka (1738) | Lost 0-2 | -191735 |
| 12standard | 244 | Oh, Joo Hyun (1757) | Won 2-0 | +191754 |
| 13standard | 180 | Katagiri, Keisuke (1538) | Won 2-0 | +141768 |
| 14standard | 179 | Huang, Hao-Shan (1893) | Lost 1-2 | -161752 |
| 15standard | 153 | Kiwanont, Sukhum (1708) | Lost 1-2 | -191733 |
| top | average opponent: 1677record: 7-6 | new rating: 1733 | ||
| Grand Prix Providence 2016 (KLD standard) | starting rating: 1647 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 139 | Messer, Christopher (1543) | Won 2-1 | +161663 |
| 3standard | 19 | Fowler, Zach (1626) | Won 2-0 | +171680 |
| 4standard | 33 | Scherzo, Greg (1583) | Lost 1-2 | -201660 |
| 5standard | 137 | Wilson, Miles (1504) | Lost 0-2 | -211639 |
| 6standard | 181 | Bonin, Brad (1505) | Won 2-1 | +161655 |
| 7standard | 159 | Mackl, Valentin (1936) | Won 2-0 | +231678 |
| 8standard | 91 | Breitman, Alan (1694) | Won 2-1 | +181696 |
| 9standard | 53 | Raffensberger, Michael (1564) | Won 2-0 | +161712 |
| 10standard | 388 | Nguyen, Lan (1789) | Lost 1-2 | -171695 |
| 11standard | 426 | Livernoche, Alexandre (1640) | Draw 1-1 | -11694 |
| 12standard | 414 | Amor, Martin Miguel (1608) | Won 2-1 | +171711 |
| 13standard | 385 | Page, Veronica (1771) | Won 2-0 | +191730 |
| 14standard | 360 | Tomajko, Oliver (1950) | Won 2-1 | +221752 |
| 15standard | 350 | Cyrenne, Mathieu (1702) | Lost 1-2 | -191733 |
| top | average opponent: 1673record: 9-4-1 | new rating: 1733 | ||
| Grand Prix Atlanta 2016 (KLD limited) | starting rating: 1523 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 891 | Phal, Sam (1518) | Won 2-0 | +181541 |
| 3sealed | 848 | Strunin, Jake (1544) | Lost 1-2 | -181523 |
| 4sealed | 1006 | Cochran, Jedidiah (1467) | Won 2-1 | +171540 |
| 5sealed | 687 | Neal, Robert (1466) | Won 2-1 | +161556 |
| 6sealed | 629 | Orange, Gregory (1825) | Won 2-1 | +231579 |
| 7sealed | 625 | Weitz, Benjamin (1947) | Lost 1-2 | -121567 |
| 8sealed | 670 | Buchner, Hans (1752) | Won 2-1 | +221589 |
| 9sealed | 643 | Silverberg, Marty (1561) | Won 2-0 | +171606 |
| 10draft | 970 | Norton, Daniel (1685) | Won 2-0 | +201626 |
| 11draft | 919 | Michel, Jeffrey (1534) | Lost 0-2 | -201606 |
| 12draft | 876 | Darley, Garrett (1825) | Won 2-0 | +221628 |
| 13draft | 917 | Graham, Justin (1618) | Lost 1-2 | -181610 |
| 14draft | 858 | Still, Jim (1632) | Won 2-1 | +181628 |
| 15draft | 885 | Simon, Michael (1649) | Won 2-0 | +191647 |
| top | average opponent: 1644record: 10-4 | new rating: 1647 | ||
| Grand Prix Montreal 2016 (EMN limited) | starting rating: 1515 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 2090 | Klisiwecz, Michael (1483) | Won 2-0 | +171532 |
| 3sealed | 2126 | McIntosh, John (1630) | Lost 0-0 | -161516 |
| 4sealed | 2380 | Wu, Gavin (1548) | Won 2-0 | +191535 |
| 5sealed | 2186 | Sun, Allen (1840) | Lost 0-2 | -131522 |
| 6sealed | 2266 | Wells, Venu (1579) | Lost 0-2 | -171505 |
| 7sealed | 2355 | Bouchard, Felix (1432) | Won 2-0 | +171522 |
| 8sealed | 2304 | White, Peter (1591) | Lost 0-0 | -171505 |
| 9sealed | 2265 | Desrosiers Giabractjis, Yan (1485) | Won 2-0 | +181523 |
| top | average opponent: 1574record: 4-4 | new rating: 1523 | ||
| Grand Prix Pittsburgh 2016 (SOI standard) | starting rating: 1526 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 320 | Pressley, Tyler (1667) | Lost 1-2 | -151511 |
| 4standard | 282 | Woo, Paul (1735) | Won 2-1 | +221533 |
| 5standard | 177 | King, Matthew (1566) | Lost 1-2 | -181515 |
| 6standard | 233 | Breau, Chris (1428) | Won 2-1 | +171532 |
| 7standard | 210 | Bowles, Ryan (1546) | Won 2-0 | +181550 |
| 8standard | 106 | Norgren, Andrew (1595) | Lost 1-2 | -171533 |
| 9standard | 279 | Schapurga, Kyle (1529) | Lost 0-2 | -181515 |
| top | average opponent: 1581record: 3-4 | new rating: 1515 | ||
| Grand Prix New York 2016 (SOI standard) | starting rating: 1555 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 119 | Flores, Michael (1669) | Won 2-1 | +201575 |
| 3standard | 431 | Hofmann, Mike (1810) | Lost 0-2 | -141561 |
| 4standard | 436 | Haversat, Jacob (1555) | Lost 0-2 | -181543 |
| 5standard | 582 | Kichline, Josh (1518) | Won 2-0 | +181561 |
| 6standard | 522 | King, Larry (1519) | Won 2-0 | +171578 |
| 7standard | 392 | Roldan, Danny (1466) | Lost 0-2 | -201558 |
| 8standard | 391 | Folinus, Jeff (1856) | Lost 0-2 | -131545 |
| 9standard | 421 | Mizrahi, Jacob (1500) | Lost 1-2 | -191526 |
| top | average opponent: 1611record: 3-5 | new rating: 1526 | ||
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1544 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 436 | Okumura, Yuji (1723) | Lost 0-2 | -151529 |
| 4sealed | 437 | Shibata, Masato (1516) | Won 2-1 | +181547 |
| 5sealed | 266 | Okuda, Masateru (1475) | Won 2-1 | +171564 |
| 6sealed | 235 | Tanabe, Kohei (1553) | Won 2-0 | +181582 |
| 7sealed | 65 | Kitahara, Hiroaki (1867) | Won 2-0 | +231605 |
| 8sealed | 47 | Nakamatu, Hirohumi (1492) | Won 2-0 | +161621 |
| 9sealed | 61 | Hirose, Yoshiyuki (1586) | Lost 1-2 | -191602 |
| 10draft | 107 | Saito, Hirotsugu (1774) | Lost 1-2 | -151587 |
| 11draft | 17 | Yatori, Naoyuki (1599) | Won 2-0 | +181605 |
| 12draft | 102 | Hino, Yoshiaki (1839) | Lost 1-2 | -131592 |
| 13draft | 122 | Yamamoto, Masafumi (1563) | Lost 1-2 | -191573 |
| 14draft | 213 | Ueno, Hiroshi (1564) | Lost 0-2 | -181555 |
| top | average opponent: 1629record: 6-6 | new rating: 1555 | ||
| Grand Prix Hong Kong 2015 (ORI limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 52 | Liu, Kin Hei (1500) | Won 2-0 | +181518 |
| 2sealed | 52 | Ng, Kenji (1582) | Draw 1-1 | +11519 |
| 3sealed | 52 | Chan, Edwin (1518) | Won 2-1 | +181537 |
| 4sealed | 52 | Kong, Rayner (1597) | Won 2-1 | +191556 |
| 5sealed | 52 | LU, CHUN I (1521) | Lost 0-2 | -181538 |
| 6sealed | 52 | Lu, Weikai (1495) | Won 2-1 | +171555 |
| 7sealed | 52 | Sek, Pok Man (1604) | Won 2-1 | +191574 |
| 8sealed | 52 | Watanabe, Yuuya (2002) | Lost 1-2 | -111563 |
| 9sealed | 52 | Liu, Yunfan (1516) | Lost 1-2 | -191544 |
| top | average opponent: 1593record: 5-3-1 | new rating: 1544 | ||