Zachar, Michal
Current rating: 1470
| Grand Prix Prague 2014 (modern) | starting rating: 1502 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 50 | Hensel, Petr (1500) | Lost 0-2 | -181484 |
| 2modern | 386 | Carle, Viktor (1482) | Lost 0-2 | -181466 |
| 3modern | 628 | Dunn, James (1541) | Won 2-1 | +201486 |
| 4modern | 504 | Albertsen, Mark (1501) | Lost 0-2 | -181468 |
| 5modern | 634 | Facchini, Nullo (1606) | Won 1-0 | +201488 |
| 6modern | 518 | Seifert, Martin (1480) | Lost 0-2 | -181470 |
| top | average opponent: 1518record: 2-4 | new rating: 1470 | ||
| Grand Prix Vienna 2008 (extended) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 72 | Vardzik, Marek (1517) | Lost 0-2 | -181483 |
| 2extended | 233 | Bednarik, Richard (1524) | Lost 1-2 | -171466 |
| 3extended | 250 | Kytka, Petr (1478) | Won 2-0 | +181484 |
| 4extended | 261 | Bottecchia, Gabriele (1532) | Won 2-1 | +191503 |
| 5extended | 157 | Civettini, Daniele (1488) | Won 2-0 | +171520 |
| 6extended | 97 | Cifka, Stanislav (1514) | Lost 0-2 | -181502 |
| top | average opponent: 1509record: 3-3 | new rating: 1502 | ||
| Grand Prix Krakow 2007 (LRW standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 111 | Klys, Bartosz (1500) | Won 2-0 | +181518 |
| 2standard | 25 | Lewandowski, Rafal (1519) | Won 2-1 | +181536 |
| 3standard | 54 | Vardzik, Marek (1536) | Won 2-0 | +181554 |
| 4standard | 5 | Labahn, Nikolas (1609) | Won 2-1 | +191573 |
| 5standard | 9 | Passow, Christopher (1421) | Lost 1-2 | -211552 |
| 6standard | 27 | Grunauer, Simon (1669) | Lost 0-2 | -161536 |
| 7standard | 65 | Hermann, Manfred (1570) | Lost 0-2 | -171519 |
| 8standard | 97 | Mueller, Szymon (1495) | Lost 1-2 | -181501 |
| top | average opponent: 1540record: 4-4 | new rating: 1501 | ||