Koprowski, John
Current rating: 1600
| Grand Prix Pittsburgh 2015 (modern) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 138 | Mitchell, Ben (1518) | Won 2-1 | +191465 |
| 2modern | 284 | Selim, Paul (1482) | Won 2-0 | +191484 |
| 3modern | 43 | Henriquez, Alexander (1494) | Won 2-0 | +181502 |
| 4modern | 116 | Braun-Duin, Brian (2089) | Won 2-1 | +271529 |
| 5modern | 94 | Denham, Jaron (1558) | Won 2-0 | +191548 |
| 6modern | 35 | De Rosa, Michael (1619) | Won 2-0 | +191567 |
| 7modern | 1 | Benson, Jonathan (1868) | Won 2-1 | +241591 |
| 8modern | 9 | Nguyen, Thien (1833) | Lost 0-2 | -141577 |
| 9modern | 26 | Miller, Austin (1652) | Won 2-1 | +191596 |
| 10modern | 10 | Morrison, Mark (1911) | Lost 0-2 | -121584 |
| 11modern | 50 | O'Brien, Chris (1610) | Lost 0-2 | -181566 |
| 12modern | 88 | Robinson, Denys (1635) | Won 2-0 | +201586 |
| 13modern | 39 | Thompson, Kale (1745) | Lost 1-2 | -161570 |
| 14modern | 96 | Moulton, Jesse (1887) | Won 2-0 | +241594 |
| 15modern | 59 | Rubin, Steve (1945) | Draw 1-1 | +61600 |
| top | average opponent: 1723record: 10-4-1 | new rating: 1600 | ||
| Grand Prix Charlotte 2015 (modern) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 867 | Iwerks, Christopher (1480) | Lost 0-2 | -181463 |
| 2modern | 1065 | Vinson, Brandon (1481) | Won 2-0 | +181481 |
| 3modern | 986 | Rahn, Dustan (1502) | Lost 1-2 | -171464 |
| 4modern | 1029 | Brakenwagen, Vince (1482) | Lost 1-2 | -181446 |
| top | average opponent: 1486record: 1-3 | new rating: 1446 | ||
| Grand Prix New Jersey 2014 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 203 | Conroy, Andre (1448) | Lost 0-2 | -191481 |
| top | record: 0-1 | new rating: 1481 | ||