Lowenhaupt, Robert
Current rating: 1548
Record: 11-8
| Grand Prix Philadelphia 2012 (RTR limited) | starting rating: 1552 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 795 | Bishop, D Z (1500) | Lost 0-0 | -191533 |
| 2sealed | 808 | Cook, Andrew (1466) | Won 2-0 | +171550 |
| 3sealed | 806 | Allen, Jeff (1503) | Won 2-1 | +171567 |
| 4sealed | 768 | Stratton, Erik (1517) | Lost 1-2 | -191548 |
| top | average opponent: 1497record: 2-2 | new rating: 1548 | ||
| Grand Prix Boston 2003 (LGN limited) | starting rating: 1556 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 166 | DePasquale, Jason (1502) | Lost 0-2 | -191537 |
| 2sealed | 169 | Keene, Ken (1464) | Won 2-1 | +161553 |
| 3sealed | 105 | Weaver, Luke (1499) | Won 2-1 | +171570 |
| 4sealed | 129 | Impellizzieri, Anthony (1559) | Lost 1-2 | -181552 |
| top | average opponent: 1506record: 2-2 | new rating: 1552 | ||
| Grand Prix Philadelphia 2002 (ONS rochester) | starting rating: 1540 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 73 | Blakeley, Gregory (1499) | Won 2-1 | +181558 |
| 2sealed | 1 | Schwartz, Michael (1517) | Lost 0-2 | -191539 |
| 3sealed | 170 | Stefanovic, Lou (1481) | Won 2-1 | +171556 |
| top | average opponent: 1499record: 2-1 | new rating: 1556 | ||
| Grand Prix Philadelphia 2000 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 43 | Brenner, Tim (1447) | Lost 0-0 | -191481 |
| 2extended | 201 | Hannon, Michael (1482) | Won 0-0 | +181499 |
| 3extended | 107 | Anthon, J.R. (1499) | Lost 0-0 | -181481 |
| 4extended | 215 | McDonough, Anthony (1465) | Won 0-0 | +181499 |
| 5extended | 137 | Bozievich, Matt (1500) | Won 0-0 | +181517 |
| 6extended | 107 | Fear, Edward (1574) | Won 0-0 | +191536 |
| 7extended | 83 | Lipps, Doug (1583) | Won 0-0 | +191555 |
| 8extended | 56 | Williams, David A (1753) | Lost 0-0 | -151540 |
| top | average opponent: 1538record: 5-3 | new rating: 1540 | ||