Piatkowski, Michal
Current rating: 1397
Record: 2-8
| Grand Prix Krakow 2015 (DTK standard) | starting rating: 1413 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 118 | Vardzik, Tomas (1549) | Lost 0-2 | -161397 |
| record: 0-1 | new rating: 1397 | |||
| Grand Prix Warsaw 2014 (JOU limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 216 | Ballanger, Stuart (1531) | Lost 0-2 | -171483 |
| 2sealed | 364 | Kula, Blazej (1465) | Won 2-1 | +171500 |
| 3sealed | 254 | Bajerowicz, Adam (1566) | Lost 1-2 | -171483 |
| 4sealed | 343 | Sorribas, Xavier (1542) | Lost 1-2 | -161467 |
| 5sealed | 396 | Suberlak, Mateusz (1462) | Lost 0-2 | -191448 |
| 6sealed | 391 | Kondracki, Lukasz (1452) | Lost 0-2 | -181430 |
| 7sealed | 355 | Brandt, Sebastian (1446) | Lost 0-0 | -171413 |
| 8sealed | 321 | Pinchon, Coralie (1423) | Won 2-0 | +181431 |
| 9sealed | 272 | Malecki, Mateusz (1429) | Lost 1-2 | -181413 |
| average opponent: 1479record: 2-7 | new rating: 1413 | |||