Prusak, Earl
Current rating: 1651
Record: 42-34-1
| Regional Championships Calgary 2023 (pioneer) | starting rating: 1705 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 38 | Pite, Derek (1843) | Lost 0-2 | -151690 |
| 2pioneer | 57 | Hatch, Alex (1477) | Lost 0-2 | -221668 |
| 3pioneer | 77 | Zafra, Marcel Angelo (1696) | Lost 0-2 | -171651 |
| top | average opponent: 1672record: 0-3 | new rating: 1651 | ||
| Regional Championships Calgary 2022 (pioneer) | starting rating: 1604 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 56 | Van Breugel, Benjamin (1538) | Lost 0-2 | -201584 |
| 2pioneer | 118 | Delos Trinos, Jonathan (1466) | Lost 0-2 | -201564 |
| 3pioneer | 101 | Ferreira, Marco (1532) | Won 2-0 | +181582 |
| 4pioneer | 94 | Feliciano, Marc Rainier (1524) | Won 2-0 | +171599 |
| 5pioneer | 87 | Dore, Maxime (1844) | Lost 0-2 | -141585 |
| 6pioneer | 78 | Webb, Brad (1484) | Won 2-0 | +161601 |
| 7pioneer | 64 | Ha, Chris (1556) | Won 2-1 | +171618 |
| 8pioneer | 55 | Cherpillod, Luca (1647) | Won 2-0 | +191637 |
| 9pioneer | 44 | Eves, Nigel (1637) | Lost 1-2 | -181619 |
| 10pioneer | 34 | Cabral, Tyrone (1541) | Won 2-1 | +161635 |
| 11pioneer | 26 | Cairns, Tom (1565) | Won 2-0 | +171652 |
| 12pioneer | 24 | Schmitz, Dustin (1537) | Won 2-1 | +161668 |
| 13pioneer | 14 | Robdrup, Andy (1819) | Won 2-1 | +211689 |
| 14pioneer | 14 | Liu, Alexander (1610) | Won 2-1 | +161705 |
| top | average opponent: 1593record: 10-4 | new rating: 1705 | ||
| Regional Championships Toronto 2022 (pioneer) | starting rating: 1571 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 40 | Rood, David (1602) | Lost 0-2 | -181553 |
| 2pioneer | 149 | Schatteman, Boston (1402) | Won 2-1 | +161569 |
| 3pioneer | 72 | Price, Ky (1505) | Won 2-1 | +171586 |
| 4pioneer | 63 | Ouellet-Marcille, Jeremie (1529) | Lost 1-2 | -191567 |
| 5pioneer | 101 | Hawron, Richard (1479) | Won 2-1 | +161583 |
| 6pioneer | 59 | Bernier, Gabriel (1569) | Lost 0-2 | -181565 |
| 7pioneer | 105 | Hubbard, Trevor (1506) | Won 2-1 | +171582 |
| 8pioneer | 58 | Smith, Peter (1551) | Won 2-1 | +171599 |
| 9pioneer | 53 | Yzeiri, Erik (1552) | Lost 0-2 | -191580 |
| 10pioneer | 52 | Skorik, Andrew (1741) | Won 2-1 | +211601 |
| 11pioneer | 36 | Toupin, Curtis (1530) | Won 2-1 | +171618 |
| 12pioneer | 43 | Sandrin, Ryan (1809) | Lost 0-2 | -151603 |
| 13pioneer | 38 | Barber, Randall (1684) | Won 2-1 | +201623 |
| 14pioneer | 32 | Fischer, Avi (1564) | Lost 1-2 | -191604 |
| top | average opponent: 1573record: 8-6 | new rating: 1604 | ||
| Grand Prix Calgary 2019 (modern) | starting rating: 1524 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 252 | Bird, Michael (1528) | Won 2-0 | +181542 |
| 2modern | 178 | Hookes, Jonathan (1520) | Draw 1-1 | 01542 |
| 3modern | 181 | Wigglestove, Chancy (1488) | Won 2-1 | +171559 |
| 4modern | 95 | Therres, Carson (1534) | Won 2-0 | +181577 |
| 5modern | 48 | Poteet, Jason (1520) | Won 2-0 | +161593 |
| 6modern | 23 | Whitsitt, Steven (1437) | Won 2-0 | +161609 |
| 7modern | 12 | Wu, Hsia-Pai Patrick (1588) | Lost 0-2 | -191590 |
| 8modern | 39 | Tran, David D (1516) | Lost 1-2 | -191571 |
| top | average opponent: 1516record: 5-2-1 | new rating: 1571 | ||
| Grand Prix Minneapolis 2018 (M19 limited) | starting rating: 1492 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 22 | Lehn, Scott (1425) | Won 2-1 | +171509 |
| 2sealed | 51 | Pham, Phillip (1740) | Lost 0-2 | -141495 |
| 3sealed | 497 | Pate, Thor (1500) | Lost 0-2 | -181477 |
| 4sealed | 547 | TerHaar, Micah (1769) | Won 2-0 | +231500 |
| 5sealed | 380 | Palmer, Chris (1571) | Won 2-0 | +201520 |
| 6sealed | 385 | Gay, Robert (1647) | Won 2-1 | +201540 |
| 7sealed | 156 | Marquardt, Robert (1676) | Lost 0-2 | -161524 |
| top | average opponent: 1618record: 4-3 | new rating: 1524 | ||
| Grand Prix Las Vegas 2017 (modern) (modern) | starting rating: 1547 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 352 | Adler, John (1503) | Won 2-0 | +171564 |
| 4modern | 32 | Sinnott, Timothy (1631) | Lost 1-2 | -171547 |
| 5modern | 517 | Booker, Mike (1418) | Lost 1-2 | -201527 |
| 6modern | 518 | Sawatari, Kai (1564) | Lost 1-2 | -171510 |
| 7modern | 872 | Cambie-Fabris, Pierluigi (1526) | Lost 1-2 | -181492 |
| top | average opponent: 1529record: 1-4 | new rating: 1492 | ||
| Grand Prix Las Vegas 2017 (limited) (AKH limited) | starting rating: 1568 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 364 | Lazarus, Jeremy (1633) | Lost 0-2 | -161552 |
| 4sealed | 526 | Lee, Mark (1517) | Won 2-0 | +171569 |
| 5sealed | 307 | Zelaya, Martin (1438) | Lost 1-2 | -201549 |
| 6sealed | 445 | Larsen, Daniel (1499) | Won 2-0 | +171566 |
| 7sealed | 477 | Bode, Dalton (1526) | Lost 0-2 | -191547 |
| top | average opponent: 1523record: 2-3 | new rating: 1547 | ||
| Grand Prix Las Vegas 2017 (legacy) (legacy) | starting rating: 1537 | |||
| round | table | opponent (rating) | result | Δrating |
| 3legacy | 539 | Smith, Greg (1655) | Won 2-1 | +201557 |
| 4legacy | 70 | Yu, Shawn (1783) | Lost 0-2 | -141543 |
| 5legacy | 414 | Miller, Raymond (1520) | Won 2-0 | +171560 |
| 6legacy | 194 | Merrien, Nick (1697) | Lost 1-2 | -151545 |
| 7legacy | 528 | Hwang, Daniel (1680) | Lost 0-2 | -161529 |
| 8legacy | 614 | Petracca, Eric (1491) | Won 2-0 | +181547 |
| 9legacy | 297 | Cicio, Joshua (1761) | Won 2-0 | +211568 |
| top | average opponent: 1655record: 4-3 | new rating: 1568 | ||
| Grand Prix Calgary 2013 (M14 standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 110 | Sieben, Darren (1500) | Won 0-0 | +181518 |
| 2standard | 9 | Duong, Jade (1500) | Won 2-0 | +181536 |
| 3standard | 94 | Drake-Heaton, Geoffrey (1518) | Lost 0-2 | -191517 |
| 4standard | 128 | Kevis, Jeremy (1520) | Won 2-0 | +181535 |
| 5standard | 247 | Hollister, Troy (1528) | Won 2-0 | +181553 |
| 6standard | 48 | Cooley, Kyle (1539) | Won 2-1 | +181571 |
| 7standard | 51 | Paul, Jason [CAN] (1570) | Lost 1-2 | -181553 |
| 8standard | 30 | Royer, Danny (1590) | Lost 0-2 | -171536 |
| 9standard | 49 | Steele, Brett (1568) | Lost 0-2 | -181518 |
| 10standard | 58 | Yu, Ben (1622) | Lost 1-2 | -161502 |
| 11standard | 57 | Maclean, Elliot (1529) | Won 2-0 | +191521 |
| 12standard | 40 | Morin, Bruno-Pier (1397) | Won 2-0 | +151536 |
| 13standard | 39 | Simon, Roland (1562) | Lost 1-2 | -171519 |
| 14standard | 45 | Coghlan, Stephen (1504) | Won 2-1 | +181537 |
| top | average opponent: 1532record: 8-6 | new rating: 1537 | ||