Kostrzewa, Krzysztof
Current rating: 1508
Record: 3-3
| Grand Prix Niagara Falls 2019 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 51 | Abramowski, Scott (1639) | Won 2-1 | +211521 |
| 2legacy | 165 | Gallagher, Grant (1518) | Won 2-0 | +171538 |
| 3legacy | 219 | Hadley, Miquez (1681) | Lost 0-2 | -151523 |
| 4legacy | 253 | O'Neil, William (1620) | Lost 1-2 | -161507 |
| 5legacy | 338 | Doolittle, Nicholas (1502) | Won 2-1 | +181525 |
| 6legacy | 195 | Russell, Travis (1607) | Lost 0-2 | -171508 |
| average opponent: 1594record: 3-3 | new rating: 1508 | |||