CERNA, ROBERTO
Current rating: 1438
Record: 4-8
| Grand Prix Houston 2013 (DGM limited) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 11 | Johnson, Mark (1500) | Won 2-0 | +191500 |
| 2sealed | 33 | Randolph, Nicholas (1520) | Won 2-0 | +181518 |
| 3sealed | 17 | Lindgren, Tommi (1868) | Lost 0-2 | -121506 |
| 4sealed | 185 | Seck, Ben (1704) | Lost 1-2 | -141492 |
| 5sealed | 223 | McGowan, Austin (1497) | Lost 0-2 | -181474 |
| 6sealed | 299 | Wiblitzhouser, Dustin (1478) | Lost 0-2 | -181456 |
| 7sealed | 245 | McGovern, Patrick (1464) | Lost 1-2 | -181438 |
| average opponent: 1576record: 2-5 | new rating: 1438 | |||
| Grand Prix Houston 2010 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 65 | DELACRUZ, JOHNNY (1500) | Won 2-1 | +181518 |
| 2extended | 78 | Neigel, Barrett (1529) | Lost 0-2 | -181500 |
| 3extended | 136 | Anderson, Nicholas A (1500) | Lost 0-2 | -181482 |
| 4extended | 220 | Wilkinson, George (1427) | Won 2-0 | +171499 |
| 5extended | 210 | Armstrong, Billy (1501) | Lost 0-2 | -181481 |
| average opponent: 1491record: 2-3 | new rating: 1481 | |||