Koren, Jonathan
Current rating: 1559
Record: 9-6
| Grand Prix Atlantic City 2015 (DTK limited) | starting rating: 1523 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 184 | Wotton, Frank (1500) | Won 2-0 | +171540 |
| 2sealed | 74 | Beaty, Aaren (1593) | Won 2-0 | +191559 |
| 3sealed | 338 | Banh, David (1546) | Won 2-0 | +181577 |
| 4sealed | 47 | Sweeney, Greg (1551) | Won 2-0 | +181595 |
| 5sealed | 26 | Bronte, Brandon (1555) | Lost 1-2 | -191576 |
| 6sealed | 148 | Mansell, Austin (1636) | Won 2-0 | +191595 |
| 7sealed | 88 | Robillard, Joe (1712) | Lost 0-2 | -161579 |
| 8sealed | 166 | Lorenz, Alex (1464) | Lost 0-2 | -201559 |
| average opponent: 1570record: 5-3 | new rating: 1559 | |||
| Grand Prix Philadelphia 2014 (BNG limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 484 | Baumgarten, Joshua (1483) | Won 2-0 | +181518 |
| 2sealed | 23 | Aldrich, Chad (1569) | Won 2-1 | +191537 |
| 3sealed | 89 | Walzer, Robert (1518) | Won 2-1 | +171554 |
| 4sealed | 157 | Patel, Hemant (1615) | Lost 1-2 | -171537 |
| 5sealed | 317 | Gareau, Philippe (1641) | Lost 1-2 | -161521 |
| 6sealed | 247 | Schooley, Patrick (1492) | Won 2-1 | +181539 |
| 7sealed | 232 | Falcioni, Matthew (1648) | Lost 1-2 | -161523 |
| average opponent: 1567record: 4-3 | new rating: 1523 | |||