Piepiorka, Karol
Current rating: 1423
Record: 2-6
| Grand Prix Prague 2015 (ORI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 360 | Kozica, Marek (1483) | Lost 0-2 | -181482 |
| 2standard | 506 | Drahokoupil, Petr (1479) | Won 2-1 | +181500 |
| 3standard | 483 | Metzger, Andre (1500) | Lost 0-2 | -181482 |
| 4standard | 525 | Tran, Thai Bao (1467) | Won 2-0 | +171499 |
| 5standard | 526 | Cordeschi, Nicola (1397) | Lost 1-2 | -191480 |
| 6standard | 533 | Smul, Mateusz (1501) | Lost 0-2 | -181462 |
| 7standard | 466 | Caron, Jean Marc (1470) | Lost 0-2 | -181444 |
| 8standard | 417 | Ringoir, Lesly (1299) | Lost 0-2 | -211423 |
| average opponent: 1449record: 2-6 | new rating: 1423 | |||