Kroth, Joe
Current rating: 1413
| Grand Prix Seattle-Tacoma 2012 (DKA limited) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 48 | Howell, Jack (1485) | Lost 0-2 | -171430 |
| 2sealed | 472 | Engle, Ben (1477) | Lost 1-2 | -171413 |
| top | average opponent: 1481record: 0-2 | new rating: 1413 | ||
| Grand Prix Seattle 2005 (extended) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 109 | Martin, Paul (1500) | Lost 0-2 | -171465 |
| 2extended | 152 | Obrut, Ray (1482) | Lost 0-2 | -181447 |
| top | average opponent: 1491record: 0-2 | new rating: 1447 | ||
| Grand Prix Seattle 2000 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 79 | Stephens, Rhett (1500) | Won 0-0 | +181518 |
| 2extended | 31 | McNelly, Marc (1518) | Lost 0-0 | -181500 |
| 3extended | 95 | Page, Eli (1500) | Won 0-0 | +181518 |
| 4extended | 69 | Cook, Cy (1579) | Lost 0-0 | -171501 |
| 5extended | 92 | Dirks, Andrew (1500) | Lost 0-0 | -181483 |
| 6extended | 92 | Anderson, Grey (1447) | Won 0-0 | +171500 |
| 7extended | 69 | Shaw, David (1500) | Lost 0-0 | -181482 |
| top | average opponent: 1506record: 3-4 | new rating: 1482 | ||