Martin, David B
Current rating: 1558
Record: 6-3
| Grand Prix Boston 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 519 | Frier, Dov (1500) | Lost 1-2 | -181482 |
| 2sealed | 642 | Sequino, Larry A (1536) | Won 2-1 | +191501 |
| 3sealed | 566 | Bialek, Peter (1500) | Won 2-1 | +181519 |
| 4sealed | 581 | Thanakit, Matthew (1518) | Won 2-0 | +181537 |
| 5sealed | 479 | Little, Christopher J (1484) | Lost 1-2 | -191518 |
| 6sealed | 599 | Cox, Patrick (1737) | Won 2-0 | +221540 |
| 7sealed | 508 | Lynk, John (1539) | Won 2-0 | +181558 |
| 8sealed | 468 | Dos Remedios, Aaron (1559) | Lost 0-2 | -181540 |
| 9sealed | 482 | Onusic, Justin (1554) | Won 2-0 | +181558 |
| average opponent: 1547record: 6-3 | new rating: 1558 | |||