Sirek, Jaroslav
Current rating: 1528
Record: 13-12-2
| Grand Prix Prague 2019 (UMA limited) | starting rating: 1546 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 604 | Bolesch, Michael (1507) | Lost 1-2 | -191527 |
| 2sealed | 1317 | Jousma, Baukejan (1587) | Lost 0-2 | -171510 |
| 3sealed | 1152 | Herman, Michal (1464) | Won 2-1 | +171527 |
| 4sealed | 1081 | Horvath, Aron (1417) | Won 2-1 | +161543 |
| 5sealed | 599 | Platt, Christoph (1706) | Lost 0-2 | -151528 |
| top | average opponent: 1536record: 2-3 | new rating: 1528 | ||
| Grand Prix Prague 2018 (modern) | starting rating: 1503 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 489 | Zsigri, Marton (1500) | Won 2-0 | +181521 |
| 2modern | 357 | Kremenchugski, Vladimir (1645) | Lost 1-2 | -161505 |
| 3modern | 671 | Mas, Thibaud (1499) | Lost 1-2 | -181487 |
| 4modern | 735 | Schwack, Fabian (1481) | Won 2-1 | +181505 |
| 5modern | 554 | Locher, Benjamin (1536) | Won 2-1 | +191524 |
| 6modern | 369 | Babych, Iurii (1772) | Won 2-1 | +221546 |
| 7modern | 241 | Hansel, Timo (1531) | Won 2-0 | +181564 |
| 8modern | 156 | Engelsdorfer, Fabian (1565) | Lost 1-2 | -181546 |
| top | average opponent: 1566record: 5-3 | new rating: 1546 | ||
| Grand Prix Prague 2016 (legacy) | starting rating: 1505 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 3 | McLean, Daquan (1513) | Lost 1-2 | -181487 |
| 2legacy | 410 | Dagani, Samuele (1402) | Won 2-0 | +161503 |
| 3legacy | 502 | Vazzoler, Giulio (1530) | Lost 0-2 | -171486 |
| 4legacy | 613 | Clasen, Per (1481) | Lost 0-2 | -181468 |
| 5legacy | 584 | Misianik, Peter (1415) | Won 2-1 | +171485 |
| 6legacy | 531 | Kordovan, Daniel (1508) | Lost 1-2 | -181467 |
| 7legacy | 555 | Koskinas, Nikos (1464) | Won 2-1 | +181485 |
| 8legacy | 432 | Kousgaard Poulsen, Simon (1481) | Won 2-0 | +181503 |
| top | average opponent: 1474record: 4-4 | new rating: 1503 | ||
| Grand Prix Prague 2013 (M14 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 102 | Bausch, Joshua (1500) | Won 2-1 | +181518 |
| 2sealed | 258 | Iliev, Ilian (1654) | Draw 1-1 | +21520 |
| 3sealed | 336 | Crowley, Martin (1518) | Won 2-0 | +181538 |
| 4sealed | 208 | Albersdorfer, Simon (1539) | Lost 1-2 | -181520 |
| 5sealed | 360 | Kitanovic, Miodrag (1689) | Draw 1-1 | +31523 |
| 6sealed | 467 | Bangert, Jan (1490) | Lost 0-2 | -181505 |
| top | average opponent: 1565record: 2-2-2 | new rating: 1505 | ||