Kowalczyk, Artur
Current rating: 1459
Record: 7-10
| Grand Prix Warsaw 2018 (GRN limited) | starting rating: 1526 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 138 | Pinkster, Wilco (1741) | Lost 0-2 | -141512 |
| 2sealed | 436 | Nunn, Richard (1675) | Lost 1-2 | -151497 |
| 3sealed | 877 | Filz, Sebastian (1490) | Won 2-1 | +171514 |
| 4sealed | 720 | Dellacasa, Francisco (1416) | Won 2-0 | +171531 |
| 5sealed | 644 | Baldrati, Enrico (1640) | Lost 0-2 | -161515 |
| 6sealed | 591 | Rahm, Torsten (1488) | Lost 0-2 | -191496 |
| 7sealed | 591 | Donhefner, Mateusz (1468) | Lost 0-2 | -181478 |
| 8sealed | 516 | Wrona, Grzegorz (1452) | Lost 0-2 | -191459 |
| average opponent: 1546record: 2-6 | new rating: 1459 | |||
| Grand Prix Prague 2015 (ORI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 285 | Dedicik, Zdenek (1500) | Won 2-1 | +181518 |
| 2standard | 262 | Wrzesinski, Piotr (1642) | Lost 0-2 | -161502 |
| 3standard | 399 | Boruvka, Petr (1756) | Won 2-1 | +231525 |
| 4standard | 405 | Chovanec, Jakub (1502) | Lost 1-2 | -191506 |
| 5standard | 478 | Schulz, Michael (1321) | Won 2-0 | +151521 |
| 6standard | 270 | Dehulster, Wolf (1515) | Lost 1-2 | -181503 |
| 7standard | 356 | Haiduk, Rene Robert (1508) | Lost 1-2 | -181485 |
| 8standard | 377 | Przybylo, Dariusz (1614) | Won 2-1 | +201505 |
| 9standard | 290 | Hitz, Michael (1634) | Won 2-0 | +211526 |
| average opponent: 1555record: 5-4 | new rating: 1526 | |||