Chaulk, Michael
Current rating: 1567
| Grand Prix Indianapolis 2008 (SHM limited) | starting rating: 1552 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 142 | Hauptmann, Aaron (1531) | Lost 0-2 | -181534 |
| 3sealed | 248 | Verstrat, Mattnew (1502) | Won 2-0 | +171551 |
| 4sealed | 220 | Sieber, John (1518) | Won 2-0 | +181569 |
| 5sealed | 226 | Shapiro, David (1535) | Won 2-1 | +171586 |
| 6sealed | 40 | Merwin, Jason (1597) | Lost 1-2 | -181568 |
| 7sealed | 124 | Muir, Justin (1475) | Won 2-1 | +171585 |
| 8sealed | 114 | Cuvelier, John (1595) | Lost 0-2 | -181567 |
| top | average opponent: 1536record: 4-3 | new rating: 1567 | ||
| Grand Prix Minneapolis 2005 (Kamigawa block) | starting rating: 1540 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 51 | Stewart, Daren (1464) | Won 2-0 | +161556 |
| 2block | 58 | Meyer, Andrew 7947 (1518) | Won 2-0 | +181574 |
| 3block | 47 | Hanft, Tyler (1536) | Won 2-0 | +171591 |
| 4block | 1 | Heriford, Brandon (1525) | Lost 0-2 | -191572 |
| 5block | 72 | Malette, Jason (1483) | Lost 1-2 | -201552 |
| top | average opponent: 1505record: 3-2 | new rating: 1552 | ||
| Grand Prix Columbus 2004 (DST limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 62 | Foster, Kirk (1467) | Lost 1-2 | -191481 |
| 2sealed | 220 | Knight, John (1482) | Won 2-1 | +181499 |
| 3sealed | 259 | Krueger, Steve (1467) | Won 2-0 | +181517 |
| 4sealed | 199 | Rider, Josh (1765) | Lost 0-2 | -141503 |
| 5sealed | 196 | Girdlestone, John (1500) | Won 2-0 | +181521 |
| 6sealed | 134 | Shaheen, Anthony (1518) | Won 2-0 | +181539 |
| 7sealed | 150 | Yurchick, Adam (1590) | Won 2-0 | +191558 |
| 8sealed | 71 | Mangner, Joel (1545) | Lost 0-2 | -181540 |
| top | average opponent: 1542record: 5-3 | new rating: 1540 | ||