Zajac, Mariusz
Current rating: 1366
Record: 3-11-1
| Grand Prix Prague 2019 (UMA limited) | starting rating: 1429 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 566 | Solhaug, Paal B. (1520) | Draw 1-1 | +11430 |
| 2sealed | 999 | Abdyli, Aldo (1500) | Lost 1-2 | -161414 |
| 3sealed | 1032 | Peuker, Thomas (1581) | Lost 0-2 | -151399 |
| 4sealed | 1092 | Pytloun, Ludek (1317) | Won 2-0 | +161415 |
| 5sealed | 919 | Huprich, Sabrina (1487) | Lost 1-2 | -161399 |
| 6sealed | 862 | Skoda, Jan (1505) | Lost 1-2 | -171382 |
| 7sealed | 733 | Franke, Anselm (1450) | Lost 0-2 | -161366 |
| average opponent: 1480record: 1-5-1 | new rating: 1366 | |||
| Grand Prix Warsaw 2017 (XLN standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 46 | Tzahi, Roei (1500) | Won 2-0 | +181518 |
| 2standard | 34 | Matych, Adrian (1611) | Lost 1-2 | -161502 |
| 3standard | 376 | Neubacher, Lauritz (1558) | Won 2-0 | +191521 |
| 4standard | 292 | Hradil, Radek (1572) | Lost 1-2 | -171504 |
| 5standard | 429 | Piotrowski, Adam (1465) | Lost 0-2 | -191485 |
| 6standard | 504 | Sodergren, Christian (1374) | Lost 1-2 | -201465 |
| 7standard | 450 | Gutierrez Vinas, Daniel (1527) | Lost 0-2 | -171448 |
| 8standard | 422 | Pawelec, Magdalena (1376) | Lost 0-2 | -191429 |
| average opponent: 1498record: 2-6 | new rating: 1429 | |||