Manning, John C
Current rating: 1449
Record: 3-6
| Grand Prix Miami 2013 (DGM standard) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 312 | Rivers, Christopher (1488) | Won 2-1 | +181464 |
| 2standard | 112 | Keene, Cory (1517) | Lost 1-2 | -171447 |
| 3standard | 350 | Winbarg, David (1500) | Won 2-1 | +191466 |
| 4standard | 181 | Quintero, Pedro (1409) | Won 2-1 | +171483 |
| 5standard | 123 | Tripp, Joshua (1551) | Lost 1-2 | -161467 |
| 6standard | 293 | McKenzie, E (1505) | Lost 0-2 | -181449 |
| average opponent: 1495record: 3-3 | new rating: 1449 | |||
| Grand Prix Charlotte 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 6 | Wheeler, Orrin (1482) | Lost 0-2 | -181482 |
| 2sealed | 333 | Balgeman, Andy (1482) | Lost 1-2 | -181464 |
| 3sealed | 532 | Franks, Karen (1464) | Lost 0-2 | -181446 |
| average opponent: 1476record: 0-3 | new rating: 1446 | |||