Walkowski, Mark
Current rating: 1467
Record: 5-7
| Grand Prix Oklahoma City 2017 (modern) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 519 | Heifner, William (1500) | Won 2-1 | +181501 |
| 2modern | 15 | Bortz, Chad (1516) | Won 2-1 | +191520 |
| 3modern | 212 | McQuary, Andrew (1537) | Lost 1-2 | -181502 |
| 4modern | 272 | Mayall, Courtney (1514) | Lost 1-2 | -181484 |
| 5modern | 297 | Cole, Zac (1499) | Lost 0-2 | -171467 |
| average opponent: 1513record: 2-3 | new rating: 1467 | |||
| Grand Prix Milwaukee 2016 (KLD limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 128 | Ulland, Mike (1546) | Lost 1-2 | -171483 |
| 2sealed | 494 | Barnett, Bobby (1482) | Won 2-0 | +181501 |
| 3sealed | 515 | Schwaderer, Thomas (1402) | Won 2-0 | +161517 |
| 4sealed | 330 | Kochaver, Steve (1523) | Won 2-0 | +181535 |
| 5sealed | 150 | Norton, Daniel (1701) | Lost 0-2 | -151520 |
| 6sealed | 358 | Holden, Jacob (1421) | Lost 1-2 | -201500 |
| 7sealed | 336 | Masliah, Jordan (1545) | Lost 0-2 | -171483 |
| average opponent: 1517record: 3-4 | new rating: 1483 | |||