Rock, Kenneth
Current rating: 1523
Record: 4-3
| Grand Prix Portland 2013 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 173 | Dubyk, Dilon (1437) | Lost 1-2 | -191481 |
| 2modern | 259 | Huvsam, Ira (1481) | Won 2-0 | +181499 |
| 3modern | 293 | Ma, Geoff (1652) | Won 2-1 | +211520 |
| 4modern | 262 | Robbins, Jordon (1568) | Lost 1-2 | -171503 |
| 5modern | 251 | Kolesnikov, Denis (1506) | Won 2-0 | +181521 |
| 6modern | 240 | Laskin, Lewis (1629) | Won 2-1 | +201541 |
| 7modern | 169 | Westberg, Ryan (1575) | Lost 0-2 | -181523 |
| average opponent: 1550record: 4-3 | new rating: 1523 | |||