Jelonek, Borys
Current rating: 1443
Record: 5-9
| Grand Prix Bologna 2019 (legacy) | starting rating: 1426 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 251 | Ambrosano, Andrea (1523) | Won 2-0 | +201446 |
| 2legacy | 262 | Aichinger, Dennis (1487) | Lost 0-2 | -171429 |
| 3legacy | 453 | Molloy, Corey (1448) | Won 2-1 | +181447 |
| 4legacy | 177 | Falkner, Achim (1448) | Lost 0-2 | -181429 |
| 5legacy | 445 | Schuetz, Stefan (2041) | Won 2-1 | +281457 |
| 6legacy | 429 | Lasku, Nikolin (1685) | Lost 0-2 | -141443 |
| average opponent: 1605record: 3-3 | new rating: 1443 | |||
| Grand Prix Prague 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 400 | Heinzerling, Andreas (1500) | Lost 1-2 | -181482 |
| 2modern | 509 | Holtz, Henning (1458) | Lost 1-2 | -181464 |
| 3modern | 848 | Schmid, Hannah (1463) | Lost 1-2 | -181446 |
| 4modern | 956 | Maly, Dominik (1510) | Won 2-0 | +191465 |
| 5modern | 897 | Fryc, David (1466) | Lost 0-2 | -181447 |
| 6modern | 793 | Leclainche, Emmanuel (1350) | Won 2-0 | +161463 |
| 7modern | 696 | Drabek, Vratislav (1461) | Lost 0-2 | -181445 |
| 8modern | 612 | Hackl, Christoph (1395) | Lost 0-2 | -191426 |
| average opponent: 1450record: 2-6 | new rating: 1426 | |||