Summers, Jonathan
Current rating: 1484
Record: 5-6-1
| Grand Prix Oklahoma City 2013 (THS limited) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 437 | Bruce, Samuel (1500) | Won 2-0 | +191501 |
| 2sealed | 147 | Wiersema, Drew (1519) | Draw 1-1 | 01501 |
| 3sealed | 308 | Davis, Matthew (1519) | Won 2-1 | +181519 |
| 4sealed | 234 | Stierwalt, Joseph (1535) | Lost 0-2 | -171502 |
| 5sealed | 332 | McCullough, Robert (1517) | Won 2-0 | +181520 |
| 6sealed | 248 | Kuykendall, Kirk D (1565) | Lost 1-2 | -171503 |
| 7sealed | 325 | Tousi, Cameron (1473) | Lost 0-2 | -191484 |
| 8sealed | 314 | Angelo, Michael (1498) | Lost 1-2 | -181466 |
| 9sealed | 292 | Palmer, Aaron (1467) | Won 2-0 | +181484 |
| average opponent: 1510record: 4-4-1 | new rating: 1484 | |||
| Grand Prix Atlanta 2008 (ALA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 52 | DeCandio, Brennan (1521) | Lost 1-2 | -181482 |
| 2sealed | 229 | Pyrlik, Kali N (1482) | Won 2-1 | +181500 |
| 3sealed | 240 | Almonrode, Alan (1500) | Lost 1-2 | -181482 |
| average opponent: 1501record: 1-2 | new rating: 1482 | |||