Blumenthal, Sidney
Current rating: 1442
Record: 12-18
| Grand Prix New Jersey 2019 (RNA limited) | starting rating: 1402 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 230 | Kurtz, James (1444) | Won 2-0 | +181420 |
| 2sealed | 312 | Stenbeck, Matthew (1521) | Won 2-0 | +201440 |
| 3sealed | 52 | Majlaton, Alex (1926) | Lost 1-2 | -91431 |
| 4sealed | 194 | Ritter, Kyle (1684) | Won 2-0 | +221453 |
| 5sealed | 301 | LePine, Mark (1690) | Lost 0-2 | -141439 |
| 6sealed | 361 | Rodriguez, Luis (1580) | Won 2-1 | +211460 |
| 7sealed | 179 | Jones, Brandon William (1491) | Lost 1-2 | -181442 |
| top | average opponent: 1619record: 4-3 | new rating: 1442 | ||
| Grand Prix Las Vegas 2017 (limited) (AKH limited) | starting rating: 1419 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 342 | Kitay, Kenneth (1630) | Won 2-0 | +221441 |
| 4sealed | 129 | Crotts, Jennifer (1817) | Lost 1-2 | -111430 |
| 5sealed | 255 | Fournier, Matthew (1537) | Lost 0-2 | -161414 |
| 6sealed | 434 | Puckett, Katie (1548) | Lost 0-2 | -161398 |
| 7sealed | 690 | Schroeder, Josh (1481) | Won 2-1 | +201418 |
| 8sealed | 427 | DelPizzo, Paul (1538) | Lost 1-2 | -161402 |
| top | average opponent: 1592record: 2-4 | new rating: 1402 | ||
| Grand Prix Atlantic City 2015 (DTK limited) | starting rating: 1449 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 195 | Polvino, Matthew (1666) | Lost 1-2 | -141435 |
| 2sealed | 406 | Pagan, Ty (1481) | Won 2-0 | +191454 |
| 3sealed | 477 | Conklin, Thomas (1446) | Lost 1-2 | -181436 |
| 4sealed | 644 | Ciammetti, Casey (1507) | Lost 0-2 | -171419 |
| top | average opponent: 1525record: 1-3 | new rating: 1419 | ||
| Grand Prix Philadelphia 2014 (BNG limited) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 279 | Hiles, Christopher (1550) | Lost 1-2 | -171449 |
| 2sealed | 545 | Bankert, Steve (1486) | Won 2-1 | +191468 |
| 3sealed | 515 | Kane, Bill (1446) | Lost 1-2 | -191449 |
| top | average opponent: 1494record: 1-2 | new rating: 1449 | ||
| Grand Prix Philadelphia 2012 (RTR limited) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 47 | Krueger, Derek (1500) | Lost 0-2 | -171464 |
| 2sealed | 363 | Weaver, Luke (1498) | Won 2-0 | +181482 |
| 3sealed | 182 | Partington, Josh (1560) | Lost 1-2 | -161466 |
| 4sealed | 411 | Sauls, Andrew (1482) | Won 2-1 | +181484 |
| 5sealed | 230 | Hodgins, Michael (1467) | Lost 0-2 | -181466 |
| top | average opponent: 1501record: 2-3 | new rating: 1466 | ||
| Grand Prix New Jersey 2006 (TSP limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 22 | Frobel, Derek (1470) | Won 2-0 | +171517 |
| 2sealed | 37 | Monmaney, Jeremy (1516) | Won 2-0 | +181535 |
| 3sealed | 106 | Goldman, Dan (1536) | Lost 1-2 | -181517 |
| 4sealed | 196 | Ingram, Peter (1519) | Lost 0-2 | -181499 |
| 5sealed | 307 | Yanez, Cristo E (1485) | Lost 1-2 | -181481 |
| top | average opponent: 1505record: 2-3 | new rating: 1481 | ||