Sandlak, Marcin
Current rating: 1520
Record: 8-7
| Grand Prix Krakow 2015 (DTK standard) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 85 | Surynek, Tomas T (1503) | Won 1-0 | +181519 |
| 2standard | 224 | Grzywna, Artur (1518) | Won 2-0 | +181537 |
| 3standard | 283 | Dusek, Lukas (1536) | Lost 1-2 | -181519 |
| 4standard | 311 | Valtonen, Ville (1502) | Won 2-1 | +181537 |
| 5standard | 243 | Reinhardt, Felix (1493) | Lost 1-2 | -191518 |
| 6standard | 302 | Berna, Brice (1488) | Won 2-0 | +181536 |
| 7standard | 140 | Poroszkai, Laszlo (1672) | Lost 1-2 | -161520 |
| average opponent: 1530record: 4-3 | new rating: 1520 | |||
| Grand Prix Warsaw 2001 (Invasion block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 136 | Laciak, Marcin (1500) | Lost 1-2 | -181482 |
| 2block | 138 | Makowski, Kamil (1481) | Won 2-1 | +181500 |
| 3block | 94 | Drahokoupil, Michal (1558) | Won 2-0 | +191519 |
| 4block | 69 | Potocki, Karol (1518) | Won 2-0 | +181537 |
| 5block | 28 | Maciejewski, Maciej (1540) | Lost 0-2 | -181519 |
| 6block | 62 | Shepelskyy, Anatoliy (1518) | Lost 1-2 | -181501 |
| 7block | 92 | Kratena, Ivo (1517) | Won 2-1 | +181519 |
| 8block | 75 | Gorniak, Mariusz (1510) | Lost 0-2 | -181501 |
| average opponent: 1518record: 4-4 | new rating: 1501 | |||