Costisick, Troy
Current rating: 1528
| Grand Prix Chicago 2012 (modern) | starting rating: 1525 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 83 | Baum, Meg (1384) | Won 2-0 | +161541 |
| 2modern | 98 | Lee, Mon (1745) | Won 2-0 | +221563 |
| 3modern | 148 | Bunnell, Scott (1493) | Won 2-0 | +161579 |
| 4modern | 135 | Carpenter, Ryan (1739) | Lost 1-2 | -151564 |
| 5modern | 166 | Bryant, Michael (1565) | Lost 1-2 | -181546 |
| 6modern | 333 | Yan, Yan (1499) | Lost 1-2 | -191527 |
| 7modern | 287 | Detlefsen, Ryan (1456) | Won 2-1 | +171544 |
| 8modern | 199 | Llimos Muntal, Pere (1644) | Lost 1-2 | -161528 |
| top | average opponent: 1566record: 4-4 | new rating: 1528 | ||
| Grand Prix Columbus 2012 (modern) | starting rating: 1503 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 128 | Gillis, Daniel (1479) | Lost 1-2 | -191484 |
| 2modern | 308 | Forsyth, Ryan (1485) | Won 2-0 | +181502 |
| 3modern | 375 | Burton, Mike (1499) | Won 2-1 | +181520 |
| 4modern | 285 | Gangwer, Ben (1520) | Won 2-1 | +181538 |
| 5modern | 131 | Katz, Aaron (1422) | Lost 0-2 | -201518 |
| 6modern | 308 | Jones, Nathan [USA] (1472) | Won 2-1 | +171535 |
| 7modern | 124 | Bayliff, John (1541) | Lost 0-2 | -171518 |
| 8modern | 187 | Lalague, Marc (1869) | Won 2-0 | +241542 |
| 9modern | 161 | Pyka, Jeffrey (1640) | Lost 0-2 | -171525 |
| top | average opponent: 1547record: 5-4 | new rating: 1525 | ||
| Grand Prix Indianapolis 2008 (SHM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 36 | Smith, Justin (1561) | Won 2-0 | +191519 |
| 2sealed | 69 | Tedeschi, Michael (1622) | Lost 1-2 | -161503 |
| 3sealed | 401 | Treviranus, John (1500) | Lost 0-2 | -181485 |
| 4sealed | 399 | Bledsoe, Branden (1482) | Won 2-0 | +181503 |
| top | average opponent: 1541record: 2-2 | new rating: 1503 | ||