Polzin, David
Current rating: 1535
| Grand Prix Richmond 2014 (modern) | starting rating: 1496 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 1153 | McDonald, Glenn (1500) | Won 2-0 | +181514 |
| 2modern | 1247 | Currie, Matthew (1532) | Won 2-1 | +191533 |
| 3modern | 1214 | Gareau, Philippe (1654) | Won 2-0 | +201553 |
| 4modern | 1098 | Rosenthal, Stephen (1537) | Lost 0-2 | -181535 |
| 5modern | 1179 | Vaughan, Patrick (1535) | Lost 1-2 | -181517 |
| 6modern | 1226 | Avila, Jonathan (1514) | Won 2-1 | +181535 |
| 7modern | 1185 | Dail, Ryan (1522) | Won 2-1 | +171552 |
| 8modern | 1140 | Wolf, Logan (1580) | Lost 0-2 | -171535 |
| top | average opponent: 1547record: 5-3 | new rating: 1535 | ||
| Grand Prix Nashville 2010 (SOM limited) | starting rating: 1499 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 602 | Rawson, Ken (1547) | Won 2-0 | +191518 |
| 2sealed | 468 | Perez Jr., Raymond (1536) | Won 2-0 | +181536 |
| 3sealed | 517 | Yeager, Robert C (1518) | Won 2-1 | +181554 |
| 4sealed | 449 | Miller, Chris D (1459) | Draw 1-1 | -21552 |
| 5sealed | 447 | Dowse, Bryan (1531) | Lost 1-2 | -191533 |
| 6sealed | 509 | Ogreenc, Greg (1540) | Lost 0-2 | -171516 |
| 7sealed | 555 | Miller, Carl (1442) | Lost 0-2 | -201496 |
| top | average opponent: 1511record: 3-3-1 | new rating: 1496 | ||
| Grand Prix Washington DC 2010 (ROE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 682 | Wilson, Douglas (1473) | Won 2-0 | +181518 |
| 2standard | 601 | Ford, Neal (1482) | Lost 1-2 | -191499 |
| 3standard | 801 | Furrow, Tim (1479) | Lost 0-2 | -191480 |
| 4standard | 972 | Bartlett, Nicholas T (1482) | Lost 0-2 | -171463 |
| 5standard | 962 | Jasie, David J (1466) | Won 2-0 | +181481 |
| 6standard | 904 | Cohen, Matthew (1483) | Won 2-1 | +181499 |
| 7standard | 800 | Harmon, Pual (1501) | Won 2-0 | +181517 |
| 8standard | 735 | Staniunas, Charles J (1518) | Lost 0-2 | -181499 |
| top | average opponent: 1485record: 4-4 | new rating: 1499 | ||