Markstrom, Roberth
Current rating: 1608
Record: 24-18-1
| Grand Prix Oklahoma City 2017 (modern) | starting rating: 1598 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 365 | Simpson, Rusty (1482) | Won 2-0 | +161614 |
| 2modern | 45 | Hager, Stephen (1734) | Lost 1-2 | -161598 |
| 3modern | 283 | Ng, Sherwin (1441) | Won 2-0 | +151613 |
| 4modern | 226 | Krumholz, Michael (1624) | Lost 1-2 | -181595 |
| 5modern | 360 | Davenport, Justus (1458) | Won 2-0 | +161611 |
| 6modern | 288 | Morales, Thomas (1520) | Won 2-0 | +161627 |
| 7modern | 206 | Streeter, Kade (1537) | Lost 1-2 | -201607 |
| 8modern | 212 | McCullough, Hunter (1541) | Won 2-0 | +171624 |
| 9modern | 226 | Hosokawa, Yuya (1711) | Lost 1-2 | -161608 |
| top | average opponent: 1561record: 5-4 | new rating: 1608 | ||
| Grand Prix Dallas-Fort Worth 2016 (modern) | starting rating: 1534 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 152 | Koven, Robert (1724) | Won 2-0 | +221556 |
| 2modern | 349 | Freas, Gerald (1656) | Won 2-1 | +201576 |
| 3modern | 326 | Derbigny, Tony (1535) | Draw 1-1 | -11575 |
| 4modern | 214 | Randolph, Nicholas (1469) | Won 2-0 | +161591 |
| 5modern | 107 | Waymon, Larry (1711) | Won 2-0 | +201611 |
| 6modern | 54 | Sieja, Daniel (1549) | Won 2-0 | +171628 |
| 7modern | 28 | Keating, Michael (1621) | Lost 0-2 | -181610 |
| 8modern | 90 | Hart, Brian (1686) | Won 2-1 | +191629 |
| 9modern | 53 | Peters, Stephen (1890) | Lost 0-2 | -131616 |
| 10modern | 125 | Nguyen, Tai (1600) | Lost 1-2 | -181598 |
| 11modern | 213 | Schmidt, Travis (1508) | Won 2-0 | +161614 |
| 12modern | 141 | Wolff, Meghan (1701) | Lost 0-2 | -161598 |
| top | average opponent: 1638record: 7-4-1 | new rating: 1598 | ||
| Grand Prix Dallas 2000 (INV limited) | starting rating: 1539 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 14 | Bongiovanni, Mauro (1485) | Won 2-1 | +171556 |
| 2sealed | 31 | Jaramillo, Seth (1518) | Lost 0-2 | -191537 |
| 3sealed | 64 | Szigeti, Peter (1475) | Lost 0-2 | -191518 |
| 4sealed | 110 | Saliba, Karim (1482) | Won 2-0 | +171535 |
| 5sealed | 88 | Hawkins, Brandon (1482) | Won 2-0 | +171552 |
| 6sealed | 90 | Chapela, Gustavo (1551) | Lost 1-2 | -181534 |
| top | average opponent: 1499record: 3-3 | new rating: 1534 | ||
| Grand Prix Memphis 1999 (Urza's block) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 82 | O'Brien-Walker, Mike (1500) | Won 0-0 | +181501 |
| 2block | 50 | Hall, John (1518) | Lost 0-0 | -171484 |
| 3block | 83 | Cruise, Andy (1482) | Won 0-0 | +181502 |
| 4block | 66 | Flores, Michael (1514) | Won 0-0 | +181520 |
| 5block | 50 | Karthauser, Zach (1520) | Won 0-0 | +181538 |
| 6block | 40 | Onorato, John (1526) | Won 0-0 | +181556 |
| 7block | 7 | Bradley, James (1521) | Won 0-0 | +171573 |
| 8block | 9 | Schaub, Matt (1592) | Won 0-0 | +181591 |
| 9block | 6 | Rauseo, Matthew (1560) | Lost 0-0 | -181573 |
| 10block | 14 | Wescoe, Craig (1559) | Won 0-0 | +181591 |
| 11block | 9 | Watts, Ric (1679) | Lost 0-0 | -171574 |
| 12block | 12 | Guevin, Thomas (1646) | Lost 0-0 | -161558 |
| 13block | 15 | Bradley, James (1525) | Lost 0-0 | -191539 |
| top | average opponent: 1549record: 8-5 | new rating: 1539 | ||
| Grand Prix Kansas City 1999 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 4extended | 127 | Johnson, Vincent (1483) | Lost 0-0 | -181482 |
| 5extended | 95 | Neal, Travis (1482) | Won 0-0 | +181500 |
| 6extended | 67 | O'Mahoney-Schwartz, Daniel (1581) | Lost 0-0 | -171483 |
| top | average opponent: 1515record: 1-2 | new rating: 1483 | ||