Ambort, Stephan
Current rating: 1456
| Grand Prix Sacramento 2018 (M19 limited) | starting rating: 1488 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 69 | Cemo, Adam (1519) | Won 2-0 | +191507 |
| 2sealed | 155 | Jew, Brian (1579) | Lost 1-2 | -171490 |
| 3sealed | 312 | Liu, Eric (1611) | Lost 0-2 | -161474 |
| 4sealed | 452 | Miller, Max (1444) | Lost 0-2 | -181456 |
| top | average opponent: 1538record: 1-3 | new rating: 1456 | ||
| Grand Prix Portland 2010 (M11 limited) | starting rating: 1468 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 115 | Cunningham, Jackson (1530) | Lost 1-2 | -171451 |
| 2sealed | 384 | Hlynosky, Bob (1482) | Lost 0-2 | -171434 |
| 3sealed | 523 | Johnson, Morgan (1445) | Won 2-0 | +181452 |
| 4sealed | 405 | O'Dell, Timothy B (1464) | Won 2-0 | +181470 |
| 5sealed | 297 | Sharman, Dana (1499) | Won 2-0 | +191489 |
| 6sealed | 231 | Herro, Jesse (1520) | Won 2-0 | +181507 |
| 7sealed | 218 | Bardin, Pierre (1459) | Lost 0-2 | -191488 |
| top | average opponent: 1486record: 4-3 | new rating: 1488 | ||
| Grand Prix Oakland 2010 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 173 | Duterte, Daniel (1661) | Draw 1-1 | +31503 |
| 2extended | 188 | Mallow, Vince (1500) | Lost 1-2 | -181485 |
| 3extended | 270 | Crawford, Tyler J (1540) | Lost 0-2 | -171468 |
| top | average opponent: 1567record: 0-2-1 | new rating: 1468 | ||