Katz, Joshua
Current rating: 1494
| Grand Prix Dallas-Fort Worth 2019 (modern) | starting rating: 1490 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 341 | Alford, Gerrick (1568) | Lost 1-2 | -171473 |
| 2modern | 339 | Armstrong, Tanner (1482) | Lost 1-2 | -181455 |
| 3modern | 604 | Meyer, Benjamin (1805) | Won 2-0 | +241479 |
| 4modern | 462 | Ritchie, Austin (1458) | Won 2-1 | +181497 |
| 5modern | 370 | Prell, Michael (1496) | Won 2-0 | +181515 |
| 6modern | 265 | Jackson, Cody (1337) | Lost 1-2 | -211494 |
| top | average opponent: 1524record: 3-3 | new rating: 1494 | ||
| Grand Prix Tampa Bay 2019 (modern) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 206 | Pau Wu, Ricardo Benito (1500) | Lost 0-2 | -171467 |
| 2modern | 277 | Ramirez de Arellano, Alex (1431) | Lost 1-2 | -191448 |
| 3modern | 427 | Kanfer, Harrison (1467) | Won 2-1 | +181466 |
| 4modern | 399 | Pic, Christian (1481) | Won 2-1 | +191485 |
| 5modern | 353 | Nasiff, Jose (1700) | Won 2-1 | +221507 |
| 6modern | 183 | Martinez II, Eddie (1587) | Won 2-1 | +191526 |
| 7modern | 132 | Karpovck, Andrew (1500) | Lost 1-2 | -181508 |
| 8modern | 164 | Johnson, Derek 5330 (1518) | Lost 0-2 | -181490 |
| top | average opponent: 1523record: 4-4 | new rating: 1490 | ||
| Grand Prix Nashville 2012 (DKA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 151 | Buchanan, Samuel (1643) | Lost 1-2 | -151485 |
| 2sealed | 284 | Heaven, Zachary (1482) | Lost 0-2 | -181467 |
| 3sealed | 396 | Brown, Jarrod (1464) | Won 2-0 | +171484 |
| 4sealed | 450 | Hagerman, Marlie (1466) | Won 2-1 | +181502 |
| 5sealed | 290 | Burrows, Skott (1515) | Lost 1-2 | -181484 |
| top | average opponent: 1514record: 2-3 | new rating: 1484 | ||