Vaughn, Michael
Current rating: 1469
Record: 6-8
| Grand Prix Cincinnati 2014 (BNG standard) | starting rating: 1486 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 385 | Cahill, Justin (1500) | Lost 1-2 | -171469 |
| 2standard | 595 | Politis, Eleftherios (1481) | Lost 1-2 | -181451 |
| 3standard | 778 | Sullivan, Brian (1465) | Lost 0-2 | -181433 |
| 4standard | 798 | Kikta Jr., Mark (1445) | Won 2-0 | +181451 |
| 5standard | 678 | Tubbs, Timothy (1471) | Lost 1-2 | -171434 |
| 6standard | 606 | Burgess, Miles (1448) | Lost 1-2 | -181416 |
| 7standard | 524 | Cook, William (1367) | Won 2-0 | +171433 |
| 8standard | 416 | Lodato, Jack (1444) | Won 2-0 | +181451 |
| 9standard | 325 | Fleury-Lopez, Travis (1461) | Won 2-1 | +181469 |
| average opponent: 1454record: 4-5 | new rating: 1469 | |||
| Grand Prix Oakland 2010 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 197 | Koller, Katherine (1500) | Won 2-1 | +181518 |
| 2extended | 173 | Pardee, Samuel (1539) | Lost 1-2 | -181500 |
| 3extended | 257 | Gray, Tommy (1501) | Won 2-0 | +181518 |
| 4extended | 120 | Mead, Forrest (1634) | Lost 0-2 | -151503 |
| 5extended | 226 | Nguyen, James (1601) | Lost 1-2 | -171486 |
| average opponent: 1555record: 2-3 | new rating: 1486 | |||