Jacobi, William
Current rating: 1479
Record: 10-13-2
| Grand Prix Dallas-Fort Worth 2016 (modern) | starting rating: 1485 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 398 | Beard, Joshua (1545) | Lost 0-2 | -171468 |
| 4modern | 533 | Adams, Kevin (1459) | Won 2-0 | +181486 |
| 5modern | 279 | Stimec, Joe (1480) | Won 2-1 | +181504 |
| 6modern | 142 | Egner, Tevin (1605) | Lost 0-2 | -161488 |
| 7modern | 250 | Petray, Elizabeth (1605) | Won 2-0 | +201508 |
| 8modern | 263 | Lin, David (1876) | Lost 1-2 | -121496 |
| 9modern | 352 | Gruber, Argon (1538) | Lost 0-2 | -171479 |
| top | average opponent: 1587record: 3-4 | new rating: 1479 | ||
| Grand Prix San Diego 2015 (ORI standard) | starting rating: 1462 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 473 | Gusman, Jesus (1500) | Draw 1-1 | 01462 |
| 2standard | 370 | Ramirez, Jacob (1500) | Won 2-1 | +191481 |
| 3standard | 307 | Xu, Haoyu (1519) | Draw 1-1 | +11482 |
| 4standard | 453 | Harlow, Matthew (1642) | Won 2-0 | +211503 |
| 5standard | 305 | Alexander, Richard N (1536) | Lost 1-2 | -181485 |
| top | average opponent: 1539record: 2-1-2 | new rating: 1485 | ||
| Grand Prix Las Vegas 2015 (1) (MM2 limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 406 | Batarseh, Sammy (1870) | Lost 0-2 | -111453 |
| 2sealed | 356 | Liechty, Joseph (1480) | Won 2-1 | +181471 |
| 3sealed | 327 | Rama, Keval (1445) | Won 2-1 | +181489 |
| 4sealed | 265 | Le, Brian (1516) | Won 2-1 | +181507 |
| 5sealed | 71 | Heuser, Brian (1488) | Lost 1-2 | -181489 |
| 6sealed | 212 | Melvin, Paul (1609) | Won 2-0 | +201509 |
| 7sealed | 144 | Boudwin, Andrew (1752) | Lost 1-2 | -141495 |
| 8sealed | 152 | Woodrow, Karl (1508) | Lost 1-2 | -171478 |
| 9sealed | 127 | Mallette-Vanier, Guillaume (1579) | Lost 0-2 | -161462 |
| top | average opponent: 1583record: 4-5 | new rating: 1462 | ||
| Grand Prix San Antonio 2014 (KTK standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 77 | Prince, Michael (1500) | Won 2-0 | +181518 |
| 2standard | 140 | Quiroga, Reymundo (1518) | Lost 1-2 | -181500 |
| 3standard | 284 | Rodriguez, Zachary (1499) | Lost 1-2 | -181482 |
| 4standard | 447 | Sommerfeld, Daniel (1469) | Lost 0-2 | -181464 |
| top | average opponent: 1497record: 1-3 | new rating: 1464 | ||