Siedlaczek, Jacek
Current rating: 1490
Record: 3-4
| Grand Prix Warsaw 2017 (XLN standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 76 | Kowal, Filip (1561) | Won 2-1 | +191519 |
| 2standard | 94 | Alfredsson, Henrik (1773) | Won 2-1 | +231542 |
| 3standard | 234 | Schrenk, Adrian Johann (1598) | Won 2-1 | +191561 |
| 4standard | 100 | Plucinski, Karol (1522) | Lost 1-2 | -191542 |
| 5standard | 233 | Fatkulbayanov, Timur (1551) | Lost 1-2 | -181524 |
| 6standard | 324 | Hamalainen, Ari (1434) | Lost 0-2 | -201504 |
| 7standard | 368 | Ballester, Carlos (1710) | Lost 0-2 | -141490 |
| average opponent: 1593record: 3-4 | new rating: 1490 | |||