Rumski, Zac
Current rating: 1602
Record: 40-33-1
| Grand Prix Pittsburgh 2017 (AER standard) | starting rating: 1563 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 80 | Lindly, Dylan (1500) | Lost 0-2 | -191544 |
| 2standard | 410 | Nilsson, Lee (1481) | Won 2-0 | +161560 |
| 3standard | 552 | LaManna, Stephen (1572) | Won 2-0 | +191579 |
| 4standard | 348 | Schmidt, Alec (1631) | Won 2-0 | +191598 |
| 5standard | 233 | Leppo, Jay (1535) | Won 2-1 | +171615 |
| 6standard | 134 | Swarlis, Michael (1434) | Lost 0-2 | -221593 |
| 7standard | 268 | Rubinoff, Jeremy (1456) | Won 2-1 | +161609 |
| 8standard | 142 | Anderson, Seth (1753) | Won 2-1 | +201629 |
| 9standard | 126 | D'Souza, Kenith (1719) | Won 2-1 | +201649 |
| 10standard | 625 | Rasmussen, Ben (1722) | Won 2-1 | +191668 |
| 11standard | 598 | Manfield, Seth (2158) | Lost 0-2 | -91659 |
| 12standard | 614 | Pho, Teresa (1587) | Lost 0-2 | -201639 |
| 13standard | 663 | Shantz, Aaron (1660) | Lost 1-2 | -171622 |
| 14standard | 680 | Schaaf, Chris (1554) | Lost 0-2 | -201602 |
| top | average opponent: 1626record: 8-6 | new rating: 1602 | ||
| Grand Prix Pittsburgh 2016 (SOI standard) | starting rating: 1536 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 313 | Aeschbacher, Donald (1500) | Lost 0-2 | -181518 |
| 2standard | 325 | Galarza, Giovanni (1482) | Won 2-0 | +171535 |
| 3standard | 384 | Holmes, Evan (1570) | Won 2-0 | +191554 |
| 4standard | 393 | Mercado, Stephen (1504) | Won 2-1 | +171571 |
| 5standard | 121 | Sun, Allen (1750) | Won 2-1 | +211592 |
| 6standard | 134 | Costa, Matthew (1989) | Lost 0-2 | -111581 |
| 7standard | 143 | Baker, Timothy J (1545) | Lost 1-2 | -191562 |
| 8standard | 316 | Lomauro, Charles (1521) | Won 2-1 | +171579 |
| 9standard | 267 | Martin, Bob (1652) | Lost 1-2 | -161563 |
| top | average opponent: 1612record: 5-4 | new rating: 1563 | ||
| Grand Prix Pittsburgh 2015 (modern) | starting rating: 1622 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 576 | Muzila, Paul (1500) | Lost 1-2 | -201602 |
| 2modern | 1036 | Nozkowski, Daniel (1482) | Won 2-0 | +161618 |
| 3modern | 894 | Morris, Anthony (1479) | Draw 1-1 | -31615 |
| 4modern | 823 | Wang, Peixian (1514) | Lost 1-2 | -191596 |
| 5modern | 995 | Buchholz, Evan (1536) | Lost 0-2 | -201576 |
| 6modern | 938 | Balluch, Kyle (1464) | Lost 0-2 | -201556 |
| 7modern | 781 | Porter, Donnie (1445) | Lost 0-2 | -201536 |
| top | average opponent: 1489record: 1-5-1 | new rating: 1536 | ||
| Grand Prix Cleveland 2015 (FRF limited) | starting rating: 1612 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 365 | Parshall, William (1579) | Lost 1-2 | -181594 |
| 2sealed | 545 | Chaney, Christopher (1482) | Won 2-0 | +161610 |
| 3sealed | 715 | Kane, DeWitt (1728) | Lost 1-2 | -161594 |
| 4sealed | 650 | Skinger, Derrick (1484) | Won 2-0 | +161610 |
| 5sealed | 448 | Maisonville, Thomas (1498) | Won 2-0 | +161626 |
| 6sealed | 475 | Choi, Jungje (1520) | Won 2-1 | +161642 |
| 7sealed | 304 | Miller, Brian D (1560) | Lost 1-2 | -201622 |
| top | average opponent: 1550record: 4-3 | new rating: 1622 | ||
| Grand Prix Baltimore 2014 (KTK limited) | starting rating: 1637 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 44 | Lloyd, Zach (1500) | Lost 0-2 | -201617 |
| 2sealed | 433 | Wiggins, Don (1482) | Won 2-0 | +161633 |
| 3sealed | 313 | Osso, Stephen (1504) | Won 2-1 | +151648 |
| 4sealed | 316 | Yearick, Elijah (1524) | Lost 0-2 | -201628 |
| 5sealed | 398 | Cho, Joshua (1752) | Lost 1-2 | -161612 |
| top | average opponent: 1552record: 2-3 | new rating: 1612 | ||
| Grand Prix Boston-Worcester 2014 (modern) | starting rating: 1634 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 808 | Weiser, Daniel 2 (1500) | Won 2-0 | +151649 |
| 2modern | 800 | Connell, Warren (1570) | Won 2-0 | +171666 |
| 3modern | 854 | Boswell, Andrew (1804) | Won 2-0 | +201686 |
| 4modern | 820 | Lisac, Chris (1554) | Lost 1-2 | -201666 |
| 5modern | 868 | Ranweiler, Scott (1673) | Won 2-1 | +181684 |
| 6modern | 849 | Lichtenberg, Steve (1537) | Lost 1-2 | -211663 |
| 7modern | 894 | Verheyn, Steven (1354) | Won 2-0 | +131676 |
| 8modern | 816 | Hall, Daniel W (1667) | Lost 1-2 | -181658 |
| 9modern | 819 | Sun, Richard (1531) | Lost 0-2 | -211637 |
| top | average opponent: 1577record: 5-4 | new rating: 1637 | ||
| Grand Prix Richmond 2014 (modern) | starting rating: 1506 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 118 | Dedrick, Johnston (1500) | Lost 0-2 | -181488 |
| 2modern | 511 | Freeman, Calvin (1518) | Won 2-0 | +181506 |
| 3modern | 280 | Cross, Jamie (1501) | Won 2-1 | +181524 |
| 4modern | 196 | Causing, Jesus (1533) | Won 2-0 | +181542 |
| 5modern | 102 | Tousi, Cameron (1470) | Won 2-1 | +171559 |
| 6modern | 47 | Potente, Michael (1560) | Won 2-1 | +181577 |
| 7modern | 64 | Stewart, Perry (1576) | Lost 1-2 | -181559 |
| 8modern | 103 | Bertorelli, Philip (1520) | Won 2-0 | +171576 |
| 9modern | 79 | Fernandez, Rodolfo (1559) | Won 2-0 | +181594 |
| 10modern | 109 | Brown, Alex (1768) | Won 2-0 | +211615 |
| 11modern | 56 | Vu, Quang (1664) | Won 2-1 | +191634 |
| 12modern | 64 | Castillo-Vergara, Franklyn (1592) | Won 2-1 | +171651 |
| 13modern | 43 | Divelbliss, Timothy (1604) | Won 2-0 | +171668 |
| 14modern | 24 | Ketel, Ben (1783) | Lost 1-2 | -161652 |
| 15modern | 32 | Long, Robert (1612) | Lost 1-2 | -181634 |
| top | average opponent: 1584record: 11-4 | new rating: 1634 | ||
| Grand Prix Pittsburgh 2011 (M12 standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 52 | Harris, Jason (1500) | Won 2-1 | +181518 |
| 2standard | 312 | Helvick, Cory D (1512) | Lost 1-2 | -181500 |
| 3standard | 405 | Lopinto, Stephen (1502) | Won 2-1 | +181518 |
| 4standard | 269 | Burnham, James (1538) | Won 2-0 | +181536 |
| 5standard | 256 | Landriz, Erik (1841) | Lost 1-2 | -121524 |
| 6standard | 322 | Gutierrez, Carlos (1471) | Won 2-1 | +171541 |
| 7standard | 172 | Krizan, Zach (1608) | Lost 1-2 | -171524 |
| 8standard | 235 | Harrienger, Mark P (1518) | Lost 0-2 | -181506 |
| top | average opponent: 1561record: 4-4 | new rating: 1506 | ||