Pielecki, Karol
Current rating: 1485
| Grand Prix Toronto 2017 (HOU limited) | starting rating: 1443 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 260 | Mackenzie, Steven (1429) | Draw 1-1 | 01443 |
| 2sealed | 309 | Mcguire, Joe (1501) | Won 2-1 | +191462 |
| 3sealed | 298 | Hynes, Joseph (1454) | Lost 0-2 | -181444 |
| 4sealed | 440 | Stohlton, Courtney (1645) | Draw 1-1 | +31447 |
| 5sealed | 499 | Hoban, Nicholas (1499) | Won 2-1 | +191466 |
| 6sealed | 385 | Donkin, Harry (1516) | Won 2-0 | +191485 |
| 7sealed | 281 | Winter, John (1500) | Won 2-0 | +181503 |
| 8sealed | 191 | Chatel, Cedric (1507) | Lost 0-2 | -181485 |
| 9sealed | 264 | Joly, Philippe (1470) | Draw 1-1 | 01485 |
| top | average opponent: 1502record: 4-2-3 | new rating: 1485 | ||
| Grand Prix Toronto 2016 (SOI standard) | starting rating: 1479 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 8 | Morin, Sylvain (1500) | Draw 1-1 | 01479 |
| 2standard | 1019 | Foster, Robert (1500) | Draw 1-1 | +11480 |
| 3standard | 619 | Loblaw, Ian (1532) | Lost 1-2 | -171463 |
| 4standard | 670 | Wilhelmy, Francois (1378) | Won 2-0 | +161479 |
| 5standard | 564 | Gareau, Tariq (1483) | Draw 1-1 | 01479 |
| 6standard | 475 | Parsons, Devon (1518) | Lost 1-2 | -171462 |
| 7standard | 536 | Tepylo, Alek (1416) | Lost 0-2 | -191443 |
| top | average opponent: 1475record: 1-3-3 | new rating: 1443 | ||
| Grand Prix Toronto 2015 (DTK standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 349 | Fretz, Tyler (1500) | Won 2-1 | +181518 |
| 2standard | 74 | Kelly, Peter (1518) | Won 2-0 | +181536 |
| 3standard | 235 | Courson, Dawson (1502) | Lost 1-2 | -191517 |
| 4standard | 196 | Reszitnyk, Andrew (1518) | Lost 1-2 | -181499 |
| 5standard | 404 | Jean-Louis, Christopher (1500) | Won 2-1 | +181517 |
| 6standard | 440 | Gaspari, Philip-Gianni (1480) | Lost 0-2 | -181499 |
| 7standard | 379 | Filimonow, Jamie (1395) | Lost 0-2 | -201479 |
| top | average opponent: 1487record: 3-4 | new rating: 1479 | ||