Gruca, Piotr
Current rating: 1500
Record: 3-3-2
| Grand Prix Warsaw 2014 (JOU limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 136 | Szulhan, Michal (1500) | Lost 1-2 | -181482 |
| 3sealed | 267 | Gasiorowski, Michal (1499) | Won 2-1 | +181500 |
| 4sealed | 140 | Przywecka, Anna (1407) | Draw 1-1 | -11499 |
| 5sealed | 232 | Paciocco, Andrea (1526) | Won 2-1 | +181517 |
| 6sealed | 143 | Lihoreau, Ibai (1456) | Won 2-1 | +171534 |
| 7sealed | 91 | Emeka, Christian (1663) | Lost 0-0 | -161518 |
| 8sealed | 155 | Davids, Peter (1443) | Draw 1-1 | -11517 |
| 9sealed | 177 | Weber, Robert (1579) | Lost 0-2 | -171500 |
| average opponent: 1509record: 3-3-2 | new rating: 1500 | |||