Portnov, Gregory
Current rating: 1466
Record: 1-3
| Grand Prix Oakland 2013 (M14 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 70 | Lam, Jason (1590) | Lost 0-2 | -161484 |
| 2sealed | 592 | Frentz, Michael (1483) | Lost 1-2 | -181466 |
| 3sealed | 648 | Shieh, Jesse (1464) | Won 2-0 | +181484 |
| 4sealed | 607 | Thomason, Lane (1482) | Lost 1-2 | -181466 |
| average opponent: 1505record: 1-3 | new rating: 1466 | |||