Chapnick, Aaron
Current rating: 1426
| Grand Prix Miami 2013 (DGM standard) | starting rating: 1416 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 240 | Hochman, Sabrina (1500) | Won 2-0 | +191435 |
| 2standard | 51 | Sundook, Noah (1518) | Lost 1-2 | -161419 |
| 3standard | 263 | Kostanich, Steven (1500) | Draw 1-1 | +11420 |
| 4standard | 398 | Maddalena, Todd (1499) | Lost 0-2 | -161404 |
| 5standard | 462 | Beckley, Devin (1480) | Won 2-1 | +191423 |
| 6standard | 373 | Peck, Jordan (1495) | Won 2-0 | +201443 |
| 7standard | 274 | Evans, Jesse (1520) | Lost 0-2 | -171426 |
| top | average opponent: 1502record: 3-3-1 | new rating: 1426 | ||
| Grand Prix Pittsburgh 2013 (GTC limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 4 | Cumpston, Douglas (1500) | Won 2-0 | +191483 |
| 2sealed | 13 | Barton, Ian (1506) | Won 2-0 | +181501 |
| 3sealed | 22 | Gardner, Joe A (1597) | Lost 0-2 | -161485 |
| 4sealed | 493 | Logan W., (1519) | Lost 0-2 | -181467 |
| 5sealed | 414 | Amador, Robert (1504) | Lost 1-2 | -171450 |
| 6sealed | 485 | Garcia, Matthew (1468) | Lost 0-2 | -181432 |
| 7sealed | 386 | Campbell, Billy (1514) | Lost 1-2 | -161416 |
| top | average opponent: 1515record: 2-5 | new rating: 1416 | ||
| Grand Prix Tampa Bay 2002 (TOR limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 42 | Letsch, Michael (1500) | Lost 1-2 | -181482 |
| 2sealed | 97 | Rigling, Nicholas (1482) | Lost 0-2 | -181464 |
| top | average opponent: 1491record: 0-2 | new rating: 1464 | ||