Pecak, Valentino
Current rating: 1428
| Grand Prix Oakland 2013 (M14 limited) | starting rating: 1404 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 400 | Knowlton, Andres (1500) | Won 2-0 | +191423 |
| 2sealed | 108 | Babik, Robert (1518) | Lost 0-2 | -161407 |
| 3sealed | 168 | Makalinaw, Cyrus (1482) | Won 2-0 | +191426 |
| 4sealed | 265 | Snider, Warren (1434) | Won 2-1 | +181444 |
| 5sealed | 259 | Darmousseh, Michael (1536) | Lost 0-2 | -161428 |
| top | average opponent: 1494record: 3-2 | new rating: 1428 | ||
| Grand Prix Oakland 2010 (extended) | starting rating: 1428 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 225 | Christensen, Kyle (1500) | Lost 0-2 | -171411 |
| 2extended | 287 | Boland, Michael (1482) | Lost 1-2 | -161395 |
| 3extended | 289 | Clawson, Derek (1465) | Won 2-1 | +191414 |
| 4extended | 269 | Lindburg, Kaitlin (1482) | Won 2-0 | +191433 |
| 5extended | 236 | Murray, Jason (1545) | Lost 0-2 | -161417 |
| 6extended | 236 | Courtney, Adam (1483) | Won 2-0 | +191436 |
| 7extended | 204 | Kwong, Winston (1548) | Lost 1-2 | -161420 |
| 8extended | 164 | Ringler, Philip (1483) | Lost 0-2 | -161404 |
| top | average opponent: 1498record: 3-5 | new rating: 1404 | ||
| Grand Prix San Francisco 2007 (Time Spiral block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 94 | Hansen, Miles C (1500) | Lost 1-2 | -181482 |
| 2block | 177 | Lombardo, Lawrence C (1482) | Lost 0-2 | -181464 |
| 3block | 268 | Williams, Jeff (1464) | Lost 1-2 | -181446 |
| 4block | 321 | Shearer, Alexander (1446) | Won 2-0 | +181464 |
| 5block | 284 | PARKER, NATE (1463) | Lost 1-2 | -181446 |
| 6block | 246 | DeRenzis, Gregory (1446) | Lost 0-1 | -181428 |
| top | average opponent: 1467record: 1-5 | new rating: 1428 | ||