Gummesen, Derik
Current rating: 1500
Record: 33-33-2
| Grand Prix Calgary 2019 (modern) | starting rating: 1559 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 180 | Mckernan, Liz (1500) | Won 2-0 | +171576 |
| 2modern | 153 | Hemsworth, Dylan (1518) | Lost 1-2 | -191557 |
| 3modern | 348 | Wald, Tyler (1500) | Lost 1-2 | -191538 |
| 4modern | 352 | Mason, Geoff (1488) | Lost 0-2 | -191519 |
| 5modern | 363 | Oszadszky, Tanya (1464) | Lost 0-2 | -191500 |
| top | average opponent: 1494record: 1-4 | new rating: 1500 | ||
| Grand Prix Seattle 2018 (legacy) (legacy) | starting rating: 1514 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 497 | Gill, Harjeevan (1500) | Won 2-1 | +181532 |
| 2legacy | 44 | Ellis, Jarrod (1722) | Won 2-1 | +211553 |
| 3legacy | 275 | Burch, Jacob (1630) | Lost 0-2 | -161537 |
| 4legacy | 251 | Tang, Kevin (1522) | Won 2-1 | +181555 |
| 5legacy | 209 | Castor, Kenny (1767) | Won 2-0 | +211576 |
| 6legacy | 59 | Fairchild, Samuel (1544) | Lost 0-2 | -181558 |
| 7legacy | 248 | Whelan, Daniel (1541) | Lost 0-2 | -191539 |
| 8legacy | 301 | Lutzi, Brenden (1634) | Won 2-0 | +201559 |
| top | average opponent: 1607record: 5-3 | new rating: 1559 | ||
| Grand Prix Vancouver 2016 (OGW limited) | starting rating: 1550 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 96 | Ueda, Jay (1629) | Lost 0-0 | -161534 |
| 4sealed | 279 | Friesen, Nick (1481) | Lost 0-2 | -191515 |
| 5sealed | 618 | Lewang, Jordan (1498) | Won 2-0 | +181533 |
| 6sealed | 253 | Kivela, Alexander (1516) | Lost 1-2 | -191514 |
| top | average opponent: 1531record: 1-3 | new rating: 1514 | ||
| Grand Prix Las Vegas 2015 (1) (MM2 limited) | starting rating: 1559 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 173 | Lyons, Phillip (1526) | Won 2-0 | +181577 |
| 4sealed | 87 | Graham, Dustyn (1537) | Won 2-0 | +171594 |
| 5sealed | 2 | Engle, Woodrow (1693) | Won 2-0 | +201614 |
| 6sealed | 6 | Sajgalik, Eduardo (1914) | Lost 0-2 | -131601 |
| 7sealed | 15 | Falcioni, Matthew (1817) | Lost 0-2 | -141587 |
| 8sealed | 53 | Casasola, Oscar (1629) | Lost 0-2 | -171570 |
| 9sealed | 81 | Iden, Derek (1504) | Lost 0-2 | -201550 |
| top | average opponent: 1660record: 3-4 | new rating: 1550 | ||
| Grand Prix Vancouver 2015 (modern) | starting rating: 1545 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 25 | Collier, Jim (1390) | Lost 1-2 | -211524 |
| 4modern | 186 | Peters, Cody (1517) | Won 2-0 | +181542 |
| 5modern | 91 | McLean, Trey (1501) | Lost 1-2 | -181524 |
| 6modern | 301 | Huang, Ian (1520) | Lost 1-2 | -191505 |
| 7modern | 262 | Sulyma, Kyle (1489) | Won 2-0 | +181523 |
| 8modern | 209 | E, Chris (1534) | Won 2-0 | +181541 |
| 9modern | 131 | Doo, Godwin (1532) | Won 2-0 | +181559 |
| top | average opponent: 1498record: 4-3 | new rating: 1559 | ||
| Grand Prix Los Angeles 2014 (KTK standard) | starting rating: 1588 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 317 | Garcia, Alexander (1519) | Won 2-1 | +161604 |
| 4standard | 165 | Whitt, Shaun (1553) | Lost 1-2 | -191585 |
| 5standard | 297 | Burch, Jacob (1521) | Lost 1-2 | -191566 |
| 6standard | 317 | Cruz, Jorge (1529) | Lost 1-2 | -191547 |
| 7standard | 430 | Santos, Iris (1466) | Won 2-1 | +171564 |
| 8standard | 330 | Quast, Nicholas (1520) | Lost 0-2 | -191545 |
| top | average opponent: 1518record: 2-4 | new rating: 1545 | ||
| Grand Prix Vancouver 2014 (THS standard) | starting rating: 1549 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 41 | Anderson-Dolan, Dor (1518) | Won 2-0 | +181567 |
| 3standard | 17 | Sirois, Mitch (1533) | Won 2-1 | +171584 |
| 4standard | 25 | Danylyshen, Nicholas (1742) | Lost 0-2 | -151569 |
| 5standard | 193 | Addison, Graeme (1537) | Won 2-1 | +171586 |
| 6standard | 93 | Eterosa, John (1574) | Won 2-0 | +181604 |
| 7standard | 38 | Price, Aaron (1602) | Lost 1-2 | -181586 |
| 8standard | 88 | Rasmussen, Ben (1732) | Lost 0-2 | -151571 |
| 9standard | 104 | Trendall, Tim (1509) | Won 2-0 | +171588 |
| top | average opponent: 1593record: 5-3 | new rating: 1588 | ||
| Grand Prix Calgary 2013 (M14 standard) | starting rating: 1550 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 69 | Harbison, Justin (1553) | Lost 1-2 | -181532 |
| 4standard | 67 | Damizet, Stephane (1627) | Won 2-1 | +201552 |
| 5standard | 67 | Chris E., (1503) | Won 2-0 | +171569 |
| 6standard | 67 | Salahub, Nelson (1513) | Lost 0-2 | -191550 |
| 7standard | 67 | Chateau, Patrick (1500) | Won 2-0 | +171567 |
| 8standard | 67 | Crossman, Cody (1581) | Lost 0-2 | -181549 |
| top | average opponent: 1546record: 3-3 | new rating: 1549 | ||
| Grand Prix Las Vegas 2013 (MMA limited) | starting rating: 1552 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 279 | Ridgway, Colin (1481) | Lost 1-2 | -191533 |
| 3sealed | 274 | Pedersen, Benjamin (1501) | Lost 1-2 | -191514 |
| 4sealed | 388 | Wilson, Kyle (1493) | Won 2-0 | +181532 |
| 5sealed | 324 | Pohjola, Brendan (1505) | Won 2-1 | +171549 |
| 6sealed | 280 | Sears, Isaac (1659) | Lost 0-2 | -161533 |
| 7sealed | 31 | Bear, Jim (1412) | Won 2-0 | +161549 |
| 8sealed | 187 | Hilton, Michael (1635) | Won 2-1 | +201569 |
| 9sealed | 134 | Buchheit, Jacob (1535) | Lost 0-2 | -191550 |
| top | average opponent: 1528record: 4-4 | new rating: 1550 | ||
| Grand Prix Charlotte 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1040 | Carpenter, Nathan (1463) | Won 2-0 | +171517 |
| 2sealed | 875 | Lyons, Phillip (1607) | Lost 0-2 | -161501 |
| 3sealed | 906 | McAreavy, Ian C (1500) | Won 2-1 | +181519 |
| 4sealed | 900 | Zinke, Adam (1519) | Draw 1-1 | 01519 |
| 5sealed | 936 | Watson, Brandon (1466) | Won 2-0 | +171536 |
| 6sealed | 839 | Yang, Chih-Hsiang (1534) | Lost 1-2 | -181518 |
| 7sealed | 905 | Casey, Shawn (1434) | Draw 1-1 | -21516 |
| 8sealed | 519 | Thomas, Aileen (1520) | Won 2-1 | +181534 |
| 9sealed | 461 | Silvestro, Carlton (1503) | Won 2-0 | +181552 |
| top | average opponent: 1505record: 5-2-2 | new rating: 1552 | ||