Janiszewski, Stefan
Current rating: 1390
Record: 12-21-1
| Grand Prix Hartford 2018 (modern) | starting rating: 1397 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 492 | Stone, Matt (1656) | Lost 1-2 | -141383 |
| 2modern | 636 | Pless, Iain (1482) | Lost 1-2 | -161367 |
| 3modern | 855 | Corsitto, Jason (1464) | Won 2-0 | +201387 |
| 4modern | 750 | Gay, Christopher (1482) | Won 2-0 | +191406 |
| 5modern | 605 | Stoddard, Garrett (1498) | Lost 1-2 | -161390 |
| top | average opponent: 1516record: 2-3 | new rating: 1390 | ||
| Grand Prix Vancouver 2017 (modern) | starting rating: 1448 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 2188 | Crabill, Benjamin (1500) | Lost 1-2 | -181430 |
| 2modern | 2544 | Hilbach, Craig (1487) | Lost 1-2 | -161414 |
| 3modern | 2647 | Mushkatin, Konstantin (1472) | Lost 0-2 | -171397 |
| top | average opponent: 1486record: 0-3 | new rating: 1397 | ||
| Grand Prix Seattle-Tacoma 2015 (legacy) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 571 | Riisness, Isaac (1495) | Lost 0-2 | -181445 |
| 2legacy | 754 | Gunter, Leo (1482) | Won 2-0 | +191464 |
| 3legacy | 518 | Harrison, Mike (1568) | Draw 1-1 | +21466 |
| 4legacy | 614 | Messina, Vincent (1457) | Lost 1-2 | -181448 |
| top | average opponent: 1500record: 1-2-1 | new rating: 1448 | ||
| Grand Prix Vancouver 2015 (modern) | starting rating: 1498 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 375 | Bonin, Alex (1500) | Won 2-1 | +181516 |
| 2modern | 91 | Christensen, Sacha (1518) | Lost 1-2 | -181498 |
| 3modern | 235 | Hausmanis, Peter (1469) | Won 2-1 | +181516 |
| 4modern | 306 | Egli, Chad (1521) | Lost 1-2 | -181498 |
| 5modern | 348 | LaFleur, Jackson (1551) | Lost 1-2 | -171481 |
| 6modern | 330 | Ouano, Jeff (1460) | Lost 1-2 | -181463 |
| top | average opponent: 1503record: 2-4 | new rating: 1463 | ||
| Grand Prix Boston-Worcester 2014 (modern) | starting rating: 1513 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 119 | Gardner, Ben (1500) | Lost 0-2 | -181495 |
| 3modern | 366 | Dowling, Peter (1499) | Lost 1-2 | -181477 |
| 4modern | 510 | Windorf, Kieran (1486) | Won 2-1 | +181495 |
| 5modern | 270 | Souto, Mike (1449) | Won 2-1 | +181513 |
| 6modern | 171 | Steht, Lee (1723) | Lost 0-2 | -151498 |
| top | average opponent: 1532record: 2-3 | new rating: 1498 | ||
| Grand Prix Portland 2013 (modern) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 4modern | 24 | Larsson, Joel (1993) | Won 2-0 | +261508 |
| 5modern | 44 | van der Vegt, Jan (1873) | Lost 0-2 | -111497 |
| 6modern | 58 | Sittner, Alex (1746) | Won 2-1 | +221519 |
| 7modern | 42 | Ravitz, Joshua (1830) | Lost 1-2 | -121507 |
| 8modern | 80 | Jacobson, Mary (1714) | Won 2-0 | +211528 |
| 9modern | 72 | Chreptyk, Brandon (1693) | Lost 0-2 | -151513 |
| top | average opponent: 1808record: 3-3 | new rating: 1513 | ||
| Grand Prix Seattle 2009 (ARB standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 76 | Kaufman, Aaron J (1500) | Lost 0-2 | -181482 |
| 2standard | 437 | McGrath, Luke (1482) | Won 2-1 | +181500 |
| 3standard | 375 | Lamica, Jon (1500) | Won 2-1 | +181518 |
| 4standard | 302 | Treviranus, John (1505) | Lost 1-2 | -181500 |
| 5standard | 395 | Watry, Jonathan (1501) | Lost 0-2 | -181482 |
| top | average opponent: 1498record: 2-3 | new rating: 1482 | ||