Sieron, Marcin
Current rating: 1513
Record: 5-4
| Grand Prix Prague 2014 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 81 | Mulders, Luke (1431) | Won 2-1 | +171517 |
| 2modern | 206 | Navarro Argemi, Eloy (1462) | Lost 1-2 | -191498 |
| 3modern | 486 | de Bruijn, Nicole (1467) | Lost 0-2 | -191479 |
| 4modern | 611 | Siemons, Bjarne (1505) | Lost 0-2 | -171462 |
| 5modern | 621 | Stibinger, Ales (1505) | Won 2-0 | +181480 |
| 6modern | 540 | Holmstedt, Rolf (1361) | Lost 1-2 | -201460 |
| 7modern | 525 | Knoch, Franz (1427) | Won 2-1 | +181478 |
| 8modern | 440 | Krejci, Petr (1499) | Won 2-0 | +181496 |
| 9modern | 297 | Schrenk, Adrian Johann (1461) | Won 2-0 | +171513 |
| average opponent: 1458record: 5-4 | new rating: 1513 | |||