De Vlaming, Sjaak
Current rating: 1735 (#4582)
Record: 25-15-2
| Grand Prix Los Angeles 2019 (modern) | starting rating: 1563 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 461 | Wang, Jiuyang (1661) | Won 2-1 | +201583 |
| 2modern | 155 | Valle, Christopher (1537) | Won 2-1 | +171600 |
| 3modern | 8 | Liu, Richard (1908) | Lost 1-2 | -131587 |
| 4modern | 496 | Yang, Daniel 0223 (1521) | Won 2-1 | +171604 |
| 5modern | 290 | Sendaydiego, Curt (1376) | Won 2-1 | +141618 |
| 6modern | 179 | Sutton, Maxwell (1655) | Won 2-0 | +191637 |
| 7modern | 110 | Tafoya, Michael (1597) | Won 2-0 | +171654 |
| 8modern | 13 | Charland, Nicholas (1711) | Lost 0-2 | -171637 |
| 9modern | 66 | Gutierrez, Steven (1679) | Won 2-0 | +191656 |
| 10modern | 55 | Barboza, Leonardo (1736) | Lost 0-2 | -171639 |
| 11modern | 103 | Core, Arden (1719) | Won 2-1 | +201659 |
| 12modern | 61 | Zazanis, Frank (1578) | Won 2-0 | +161675 |
| 13modern | 32 | Marts, Logan (1789) | Won 2-1 | +201695 |
| 14modern | 40 | Duque, Pablo (1699) | Won 2-0 | +181713 |
| 15modern | 21 | Putnam, Tyler (1902) | Won 2-0 | +221735 |
| top | average opponent: 1671record: 12-3 | new rating: 1735 | ||
| Grand Prix Hartford 2018 (modern) | starting rating: 1414 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 531 | Rosenberg, Jack (1515) | Won 2-0 | +201434 |
| 2modern | 27 | Kelly, Jordan (1524) | Lost 0-2 | -171417 |
| 3modern | 416 | Tabash, Nadher (1536) | Won 2-0 | +211438 |
| 4modern | 542 | Minerly, Shane (1518) | Lost 0-2 | -171421 |
| 5modern | 456 | Gowdy, Gerald (1502) | Won 2-0 | +201441 |
| 6modern | 292 | Hymel, Eric (1741) | Won 2-0 | +231464 |
| 7modern | 335 | Greene, Brian (1558) | Won 2-0 | +201484 |
| 8modern | 251 | Wescoe, Craig (1921) | Won 2-1 | +251509 |
| 9modern | 346 | Place, Kevin (1717) | Lost 1-2 | -141495 |
| 10modern | 351 | O'Keefe-Sommer, Lucas (1569) | Draw 1-1 | +11496 |
| 11modern | 340 | Lam, Richard (1663) | Lost 0-2 | -151481 |
| 12modern | 352 | Hangley, James (1546) | Won 2-1 | +191500 |
| 13modern | 327 | Meza, Krystian (1569) | Won 2-0 | +201520 |
| 14modern | 300 | Pelletier, Lenny (1575) | Won 2-0 | +191539 |
| 15modern | 276 | Barber, Ian (1894) | Won 2-0 | +241563 |
| top | average opponent: 1623record: 10-4-1 | new rating: 1563 | ||
| Grand Prix Richmond 2014 (modern) | starting rating: 1445 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 106 | Albrecht, Ethan (1500) | Won 2-1 | +191464 |
| 2modern | 378 | Colwell, James (1518) | Lost 1-2 | -171447 |
| 3modern | 248 | Nelson, Matthew (1503) | Draw 1-1 | +11448 |
| 4modern | 363 | Lowery, Justin (1518) | Lost 1-2 | -171431 |
| 5modern | 444 | Cable, Joshua (1481) | Won 2-0 | +191450 |
| 6modern | 335 | Wong, Kevin (1488) | Lost 0-2 | -171433 |
| 7modern | 307 | Teigesser, Jon (1378) | Lost 1-2 | -191414 |
| top | average opponent: 1483record: 2-4-1 | new rating: 1414 | ||
| Grand Prix Baltimore 2012 (DKA standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 368 | Martin, Adam (1459) | Lost 1-2 | -191481 |
| 2standard | 558 | Montgomery, Mark (1482) | Won 1-0 | +181499 |
| 3standard | 532 | Chen, Shang (1482) | Lost 0-2 | -181481 |
| 4standard | 660 | Ranweiler, Scott (1488) | Lost 1-2 | -181463 |
| 5standard | 643 | Indiveri, Vincent (1465) | Lost 0-2 | -181445 |
| top | average opponent: 1475record: 1-4 | new rating: 1445 | ||