Shak, Marcus
Current rating: 1701 (#6446)
Record: 32-19
| Grand Prix New Jersey 2020 (THB limited) | starting rating: 1725 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 421 | Papakonstantinou, Georgio (1500) | Lost 0-2 | -221703 |
| 2sealed | 446 | Kisken, Matthew (1482) | Won 2-0 | +141717 |
| 3sealed | 449 | Harder, Brendan (1328) | Won 2-0 | +111728 |
| 4sealed | 200 | Dzibela, John (1372) | Won 2-1 | +121740 |
| 5sealed | 133 | Lloyd, Alex (1523) | Won 2-1 | +141754 |
| 6sealed | 143 | Schmaltz, Matt (1821) | Lost 0-2 | -171737 |
| 7sealed | 212 | Marschall, Owen (1606) | Lost 0-2 | -201717 |
| 8sealed | 246 | Dedrick, John (1836) | Lost 0-2 | -161701 |
| top | average opponent: 1559record: 4-4 | new rating: 1701 | ||
| Grand Prix New Jersey 2019 (RNA limited) | starting rating: 1729 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 359 | Morris, Stephen (1500) | Won 2-0 | +141743 |
| 2sealed | 200 | Lew, Audrey (1606) | Lost 0-2 | -211722 |
| 3sealed | 496 | Trollinger, Adam (1447) | Won 2-0 | +141736 |
| 4sealed | 324 | Dooling, Matthew (1489) | Lost 1-2 | -231713 |
| 5sealed | 415 | Famiglietti, Louis (1479) | Won 2-0 | +141727 |
| 6sealed | 287 | Phelps, Paul (1486) | Won 2-1 | +141741 |
| 7sealed | 214 | Mulloy, Josh (1871) | Lost 0-2 | -161725 |
| top | average opponent: 1554record: 4-3 | new rating: 1725 | ||
| Grand Prix Milwaukee 2016 (KLD limited) | starting rating: 1619 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 281 | Sowell, Adam (1656) | Lost 0-2 | -181601 |
| 3sealed | 328 | Peavy, Nelson (1468) | Won 2-1 | +161617 |
| 4sealed | 301 | Forman, Dustin (1535) | Won 2-1 | +171634 |
| 5sealed | 227 | Wagener, Andrew (1635) | Won 2-0 | +181652 |
| 6sealed | 92 | Graebner, Samuel (1568) | Lost 1-2 | -201632 |
| 7sealed | 128 | Haas, Sean (1561) | Won 2-1 | +171649 |
| 8sealed | 123 | Havlovick, Jason (1557) | Won 2-0 | +161665 |
| 9sealed | 69 | Reyburn, Zachary (1762) | Won 2-0 | +201685 |
| 10draft | 58 | Wade, Samuel (1761) | Won 2-1 | +191704 |
| 11draft | 16 | Jao, Jeff (1751) | Lost 1-2 | -171687 |
| 12draft | 60 | Clarke, Trevor (1567) | Won 2-1 | +161703 |
| 13draft | 106 | Markeson, Scott (2031) | Won 2-0 | +241727 |
| 14draft | 69 | TerHaar, Micah (1877) | Lost 0-2 | -161711 |
| 15draft | 42 | Lequia, Steven (1691) | Won 2-1 | +181729 |
| top | average opponent: 1673record: 10-4 | new rating: 1729 | ||
| Grand Prix New York 2016 (SOI standard) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 247 | Arneson, Edward (1348) | Won 2-0 | +151532 |
| 2standard | 6 | Kaehler, David (1483) | Won 2-1 | +171549 |
| 3standard | 276 | Williams, Robert (1616) | Won 1-0 | +191568 |
| 4standard | 242 | Corpora, Jon (1543) | Lost 1-2 | -181550 |
| 5standard | 429 | Pin, Erik (1407) | Lost 1-2 | -211529 |
| 6standard | 424 | Felicetti, Ted (1723) | Won 2-1 | +221551 |
| 7standard | 279 | Vuorela, Lauri (1664) | Won 2-0 | +201571 |
| 8standard | 234 | Hyler, Nicholas (1587) | Won 2-0 | +181589 |
| 9standard | 106 | Gateaud, Maxime (1744) | Won 2-1 | +211610 |
| 10standard | 121 | O'Shaughnessy, James (1739) | Lost 1-2 | -161594 |
| 11standard | 129 | Crockett, Rebecca (1551) | Won 2-0 | +171611 |
| 12standard | 88 | Hu, Jonathan (1817) | Lost 1-2 | -141597 |
| 13standard | 128 | Severa, Matt (1837) | Lost 1-2 | -141583 |
| 14standard | 154 | Roth, Stephen (1588) | Won 2-0 | +191602 |
| 15standard | 150 | Walker, Samuel (1564) | Won 2-1 | +171619 |
| top | average opponent: 1614record: 10-5 | new rating: 1619 | ||
| Grand Prix Atlantic City 2015 (DTK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 333 | Volponi, Nick (1500) | Won 2-1 | +181518 |
| 2sealed | 49 | Edelman, Douglas (1594) | Lost 0-2 | -171501 |
| 3sealed | 364 | Slapinsky, Brian (1484) | Won 2-1 | +181519 |
| 4sealed | 465 | Conklin, Thomas (1464) | Lost 1-2 | -191500 |
| 5sealed | 518 | Cote, Eric (1425) | Won 2-0 | +171517 |
| 6sealed | 347 | Cinderella, Stephen (1526) | Won 2-1 | +181535 |
| 7sealed | 303 | Rutkovsky, Noah (1540) | Lost 0-2 | -181517 |
| top | average opponent: 1505record: 4-3 | new rating: 1517 | ||