Grinbergs, Jason
Current rating: 1442
Record: 12-16-1
| Grand Prix Sydney 2016 (EMN limited) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 166 | Ophel, John (1503) | Won 2-1 | +191484 |
| 2sealed | 71 | Benincasa, Giuliano (1696) | Lost 0-2 | -151469 |
| 3sealed | 369 | Manera, Michael (1508) | Lost 0-2 | -171452 |
| 4sealed | 371 | Power, Connor (1481) | Won 2-0 | +191471 |
| 5sealed | 359 | Rogers, Matthew (1889) | Lost 1-2 | -111460 |
| 6sealed | 352 | Kee, Benjamin (1482) | Lost 0-2 | -181442 |
| top | average opponent: 1593record: 2-4 | new rating: 1442 | ||
| Grand Prix Melbourne 2016 (modern) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 374 | Sutton, Lyle George (1500) | Lost 1-2 | -181483 |
| 2modern | 281 | Pickett, Jayden (1482) | Lost 0-2 | -181465 |
| 3modern | 518 | Renton, Kyle (1463) | Won 2-1 | +181483 |
| 4modern | 391 | Butters, Corey (1482) | Lost 0-2 | -181465 |
| 5modern | 501 | Schutz, Todd (1465) | Lost 1-2 | -181447 |
| 6modern | 480 | Bennett, David (1444) | Won 2-1 | +181465 |
| top | average opponent: 1473record: 2-4 | new rating: 1465 | ||
| Grand Prix Sydney 2015 (BFZ limited) | starting rating: 1559 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 28 | Lynch, Jason (1486) | Lost 1-2 | -191540 |
| 4sealed | 118 | Wong, Henry (1498) | Lost 1-2 | -191521 |
| 5sealed | 200 | Pham, Hoang (Peter) (1422) | Lost 0-2 | -201501 |
| top | average opponent: 1469record: 0-3 | new rating: 1501 | ||
| Grand Prix Sydney 2014 (M15 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 293 | Bros, Wyatt (1500) | Won 2-0 | +181518 |
| 2sealed | 111 | Campbell, Thomas (1499) | Won 2-0 | +181536 |
| 3sealed | 1 | Yuen, Jonathan (1548) | Lost 0-2 | -181518 |
| 4sealed | 149 | Yoon, Je Yeon (1589) | Won 2-1 | +191537 |
| 5sealed | 76 | White, Jarod (1501) | Won 2-0 | +181555 |
| 6sealed | 23 | Mackerill, Ben (1547) | Lost 1-2 | -191536 |
| 7sealed | 83 | Anderson, Joshua R (1536) | Won 2-0 | +181554 |
| 8sealed | 78 | Light, Jens (1743) | Won 2-0 | +221576 |
| 9sealed | 55 | Rogers, Matthew (1785) | Won 2-0 | +221598 |
| 10draft | 19 | Schneider, Tim (1589) | Lost 0-2 | -191579 |
| 11draft | 5 | Leppan Taylor, Orion (1576) | Won 2-0 | +181597 |
| 12draft | 28 | Mackerill, Ben (1574) | Lost 1-2 | -181579 |
| 13draft | 28 | Chetcuti, Vincent (1536) | Draw 1-1 | -11578 |
| 14draft | 31 | Savige, William (1509) | Lost 1-2 | -191559 |
| top | average opponent: 1574record: 8-5-1 | new rating: 1559 | ||