Cech, John
Current rating: 1526
Record: 4-3
| Grand Prix Portland 2013 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 75 | Allen, Justin C (1591) | Lost 0-2 | -161484 |
| 2modern | 362 | Goldie, Robert (1481) | Won 2-0 | +181502 |
| 3modern | 259 | Wagoner, John (1500) | Won 2-0 | +181520 |
| 4modern | 226 | Corso, Louis (1867) | Lost 0-2 | -121508 |
| 5modern | 290 | McCaw, Mitch (1504) | Won 2-1 | +181526 |
| 6modern | 180 | Paris, John (1521) | Won 2-1 | +181544 |
| 7modern | 177 | Robbins, Jordon (1589) | Lost 1-2 | -181526 |
| average opponent: 1579record: 4-3 | new rating: 1526 | |||