Lock, Margaret
Current rating: 1416
Record: 10-16-1
| Grand Prix Pittsburgh 2015 (modern) | starting rating: 1401 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 205 | Fisher, Reid (1511) | Won 2-1 | +201421 |
| 2modern | 533 | Carrin, Talon (1613) | Lost 1-2 | -151406 |
| 3modern | 683 | Mettler, Lexie (1728) | Lost 0-2 | -121394 |
| 4modern | 845 | McQueeney, Joshua (1482) | Won 2-0 | +201414 |
| 5modern | 734 | Murar, Brian (1500) | Won 2-1 | +191433 |
| 6modern | 727 | Hathcock, James (1483) | Lost 1-2 | -171416 |
| top | average opponent: 1553record: 3-3 | new rating: 1416 | ||
| Grand Prix Charlotte 2015 (modern) | starting rating: 1412 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 920 | Marshall, Jeff G (1500) | Lost 1-2 | -161396 |
| 2modern | 1014 | Poole, Tj (1482) | Won 2-1 | +191415 |
| 3modern | 883 | Delvalle, Joseph (1502) | Won 2-1 | +201435 |
| 4modern | 799 | Calhoun, Caleb (1463) | Lost 1-2 | -181417 |
| 5modern | 893 | Thacker, Caleb (1502) | Lost 0-2 | -161401 |
| top | average opponent: 1490record: 2-3 | new rating: 1401 | ||
| Grand Prix Miami 2015 (FRF standard) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 239 | Hamlett, Wade (1503) | Lost 1-2 | -181445 |
| 2standard | 367 | Hearne, Phillip D (1485) | Lost 0-2 | -171428 |
| 3standard | 621 | Smith, Robert A (1462) | Lost 0-2 | -171411 |
| 4standard | 640 | Dominguez, Benjamin (1445) | Lost 0-2 | -181393 |
| 5standard | 563 | Routledge, Sierra (1428) | Won 2-0 | +191412 |
| 6standard | 464 | Bryant, Lamar (1446) | Won 1-0 | +191431 |
| 7standard | 25 | Ayers, Patrick (1405) | Lost 0-2 | -191412 |
| 8standard | 279 | Ashby, Michael G (1445) | Won 2-0 | +191431 |
| 9standard | 209 | Macanka, Steven (1405) | Lost 0-2 | -191412 |
| top | average opponent: 1447record: 3-6 | new rating: 1412 | ||
| Grand Prix Atlanta 2014 (JOU limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 456 | Grywalski, Drew (1500) | Lost 0-2 | -181482 |
| 2sealed | 628 | Wrenn, Shawn (1462) | Lost 0-2 | -181464 |
| 3sealed | 768 | Mccallister, Nathan (1465) | Won 2-0 | +181482 |
| 4sealed | 761 | Kolodzey, William (1500) | Lost 1-2 | -181464 |
| 5sealed | 702 | Wallace Jr, Dana (1464) | Won 2-0 | +181482 |
| 6sealed | 606 | Frederick, Jacob (1401) | Draw 1-1 | -11481 |
| 7sealed | 562 | Hollman, Mandy (1483) | Lost 1-2 | -181463 |
| top | average opponent: 1468record: 2-4-1 | new rating: 1463 | ||