Jacobs, John
Current rating: 1580
Record: 22-17
| Grand Prix Las Vegas 2018 (modern) (modern) | starting rating: 1566 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 702 | Marts, Logan (1516) | Lost 0-2 | -191547 |
| 2modern | 968 | Vuong, Dan (1392) | Won 2-0 | +151562 |
| 4modern | 1368 | Barnett, Scott (1519) | Won 2-0 | +171579 |
| 5modern | 257 | Bach, Austin (1692) | Lost 1-2 | -161563 |
| 6modern | 600 | Elizalde, Victor (1500) | Won 2-0 | +171580 |
| 7modern | 243 | Pritt, Daniel (1565) | Lost 1-2 | -181562 |
| 8modern | 425 | Nguyen, Michael (1588) | Won 2-0 | +181580 |
| top | average opponent: 1539record: 4-3 | new rating: 1580 | ||
| Grand Prix Detroit 2016 (modern) | starting rating: 1537 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 651 | Peng, Tianjian (1618) | Won 2-1 | +201557 |
| 2modern | 586 | Miller, Byron (1340) | Won 2-0 | +141571 |
| 3modern | 175 | Smethurst, Dan (1430) | Lost 0-2 | -211550 |
| 4modern | 724 | Hartman, Colin (1501) | Lost 0-2 | -191531 |
| 5modern | 863 | Dodd, Brian (1475) | Won 2-0 | +171548 |
| 6modern | 617 | Stan, Samuel (1565) | Won 2-1 | +191567 |
| 7modern | 319 | Davis, Samar (1579) | Won 2-0 | +181585 |
| 8modern | 188 | Gray, Jake (1530) | Lost 1-2 | -191566 |
| 9modern | 430 | Tarleton, Greg (1565) | Won 2-1 | +181584 |
| 10modern | 201 | Emms, Brandon (1577) | Lost 0-2 | -181566 |
| top | average opponent: 1518record: 6-4 | new rating: 1566 | ||
| Grand Prix Los Angeles 2014 (KTK standard) | starting rating: 1644 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 318 | McKemy, Nathan (1500) | Lost 1-2 | -211623 |
| 2standard | 439 | Pichardo, Miguel (1482) | Lost 0-2 | -211602 |
| 3standard | 829 | Gray, Timothy (1464) | Won 2-1 | +161618 |
| 4standard | 600 | Nguyen, Andrew (1519) | Lost 1-2 | -201598 |
| 5standard | 678 | Ballardo, David (1504) | Lost 1-2 | -201578 |
| 6standard | 624 | Iwamoto, Ryan (1445) | Lost 1-2 | -201558 |
| 7standard | 504 | Merejil, Robert (1394) | Lost 0-2 | -211537 |
| top | average opponent: 1473record: 1-6 | new rating: 1537 | ||
| Grand Prix Sacramento 2014 (THS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1126 | Howell, Zachary (1500) | Won 2-0 | +181518 |
| 2sealed | 1144 | Cheifetz, Rob (1500) | Won 2-0 | +181536 |
| 3sealed | 1039 | Sandler, Noah (1675) | Won 2-0 | +201556 |
| 4sealed | 1023 | Daggett, Anthony (1637) | Won 2-0 | +201576 |
| 5sealed | 1032 | Wood, Rick (1608) | Won 2-1 | +181594 |
| 6sealed | 1003 | Huynh, Belinda (1592) | Won 2-0 | +181612 |
| 7sealed | 1004 | Mathews, Andrew (1677) | Won 2-0 | +191631 |
| 8sealed | 1004 | Hoge, Michael (1664) | Won 2-1 | +191650 |
| 9sealed | 1001 | Scott-Vargas, Luis (1894) | Won 2-1 | +221672 |
| 10draft | 9 | Bonacini, Michael (1629) | Lost 1-2 | -181654 |
| 11draft | 66 | Pei, Eric (1821) | Lost 1-2 | -151639 |
| 12draft | 45 | Scott-Vargas, Luis (1864) | Lost 1-2 | -141625 |
| 13draft | 75 | Mao, Kevin (1610) | Won 2-1 | +171642 |
| 14draft | 52 | Perry, Tyson (1690) | Won 2-0 | +191661 |
| 15draft | 24 | Salts, Matt (1684) | Lost 1-2 | -171644 |
| top | average opponent: 1670record: 11-4 | new rating: 1644 | ||