Mastalerz, Jakub
Current rating: 1491
Record: 4-5
| Grand Prix Prague 2015 (ORI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 270 | Gargulak, Daniel (1613) | Lost 1-2 | -161484 |
| 2standard | 435 | Bazhanov, Mikhail (1523) | Lost 0-2 | -171467 |
| 3standard | 665 | Kulhanek, Jan (1475) | Won 2-0 | +181485 |
| 4standard | 546 | Wurmitzer, Bernhard (1701) | Lost 1-2 | -141471 |
| 5standard | 644 | Hammer, Christian (1539) | Won 2-0 | +191490 |
| 6standard | 528 | Podzimkova, Christina (1489) | Lost 0-2 | -181472 |
| 7standard | 496 | Brankov, Dejan (1381) | Won 2-0 | +161488 |
| 8standard | 389 | Armitstead, Julian (1512) | Lost 1-2 | -171471 |
| 9standard | 326 | Przybylo, Dariusz (1594) | Won 2-0 | +201491 |
| average opponent: 1536record: 4-5 | new rating: 1491 | |||