Jacobson, Joshua
Current rating: 1460
Record: 12-17
| Grand Prix Los Angeles 2018 (M19 standard) | starting rating: 1430 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 268 | Law, Calvin (1673) | Lost 0-2 | -141416 |
| 2standard | 334 | Negrete, Robert (1482) | Won 2-1 | +191435 |
| 3standard | 388 | Ducommun, Deven (1481) | Won 2-0 | +191454 |
| 4standard | 215 | Tashjian, Karl (1558) | Won 2-1 | +201474 |
| 5standard | 228 | Rodriguez, Brian (1577) | Lost 0-1 | -161458 |
| 6standard | 237 | Miller, Wilson (1459) | Won 2-0 | +181476 |
| 7standard | 135 | Parker, Thomas (1578) | Lost 0-2 | -161460 |
| top | average opponent: 1544record: 4-3 | new rating: 1460 | ||
| Grand Prix New Jersey 2014 (legacy) | starting rating: 1438 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 981 | Krattenmaker, Rick (1575) | Won 2-0 | +201458 |
| 2legacy | 758 | Mosso, Antonio (1482) | Lost 0-2 | -171441 |
| 3legacy | 1108 | Abong, Jeffrey (1544) | Won 2-1 | +191460 |
| 4legacy | 1100 | Hunter, Wilson (1717) | Lost 0-2 | -131447 |
| 5legacy | 885 | Wingler, William (1487) | Lost 1-2 | -171430 |
| top | average opponent: 1561record: 2-3 | new rating: 1430 | ||
| Grand Prix Richmond 2014 (modern) | starting rating: 1486 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 56 | Chen, Jiayi (1800) | Lost 1-2 | -131473 |
| 2modern | 435 | RaffertyOsaki, Terumi (1482) | Lost 0-2 | -181455 |
| 3modern | 555 | Seegobin, Logan (1464) | Lost 1-2 | -171438 |
| top | average opponent: 1582record: 0-3 | new rating: 1438 | ||
| Grand Prix Philadelphia 2012 (RTR limited) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 222 | Jafari, David (1751) | Lost 0-2 | -141503 |
| 3sealed | 269 | Fleisher, Philip H (1558) | Lost 1-2 | -171486 |
| top | average opponent: 1654record: 0-2 | new rating: 1486 | ||
| Grand Prix Boston-Worcester 2012 (M13 limited) | starting rating: 1499 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 392 | O'Donnell, Brendan (1777) | Won 2-0 | +231522 |
| 3sealed | 181 | Rosen, Drew (1505) | Won 2-0 | +181540 |
| 4sealed | 76 | Beasley, Orrin (1945) | Won 2-0 | +251565 |
| 5sealed | 51 | Folinus, Jeff (1769) | Lost 1-2 | -151550 |
| 6sealed | 116 | Samms, Phil (1738) | Lost 1-2 | -141536 |
| 7sealed | 382 | Moreno, Daniel (1470) | Lost 0-2 | -191517 |
| top | average opponent: 1701record: 3-3 | new rating: 1517 | ||
| Grand Prix Baltimore 2012 (DKA standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 76 | Ranweiler, Scott (1500) | Lost 1-2 | -181482 |
| 2standard | 488 | Burkett, Benjamin (1429) | Won 2-1 | +171499 |
| 3standard | 438 | Oppenheimer, Dave M (1482) | Lost 0-2 | -181481 |
| 4standard | 562 | Mosso, Antonio (1482) | Won 2-0 | +181499 |
| 5standard | 532 | Bonilla, Byron (1500) | Won 2-0 | +181517 |
| 6standard | 386 | Weaver, James (1531) | Lost 1-2 | -181499 |
| top | average opponent: 1487record: 3-3 | new rating: 1499 | ||