Masiuk, Stefan
Current rating: 1456
Record: 8-11-2
| Grand Prix Atlantic City 2015 (DTK limited) | starting rating: 1489 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 152 | Stein, Abraham (1554) | Lost 1-2 | -171472 |
| 4sealed | 256 | Halmagyi, Joshua (1451) | Won 2-0 | +181490 |
| 5sealed | 271 | Ruszkowski, Michael (1545) | Lost 0-2 | -171473 |
| 6sealed | 250 | Kinney, James (1526) | Lost 0-2 | -171456 |
| top | average opponent: 1519record: 1-3 | new rating: 1456 | ||
| Grand Prix Philadelphia 2014 (BNG limited) | starting rating: 1486 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 116 | Endicott, Joe (1499) | Won 2-1 | +181504 |
| 2sealed | 411 | Wagner, Andrew C (1471) | Lost 0-2 | -191485 |
| 3sealed | 592 | Berry, Sean (1500) | Won 2-1 | +181503 |
| 4sealed | 243 | Martinez, Mario E (1638) | Won 2-1 | +211524 |
| 5sealed | 153 | Clark, Jeff (1550) | Lost 0-2 | -181506 |
| 6sealed | 508 | Mintz, David (1531) | Lost 1-2 | -171489 |
| top | average opponent: 1531record: 3-3 | new rating: 1489 | ||
| Grand Prix Richmond 2014 (modern) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 201 | Hridoi, Anupam (1500) | Lost 1-2 | -181483 |
| 2modern | 402 | Aaron, Devin (1464) | Lost 1-2 | -181465 |
| 3modern | 501 | Stephens, Brendan (1614) | Won 2-0 | +201485 |
| 4modern | 417 | Ekola, Matthew (1482) | Won 2-0 | +181503 |
| 5modern | 378 | Timlin, Timothy (1524) | Lost 0-2 | -171486 |
| top | average opponent: 1517record: 2-3 | new rating: 1486 | ||
| Grand Prix Atlantic City 2013 (RTR standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 278 | Miles, Ryan (1500) | Draw 1-1 | 01500 |
| 2standard | 403 | Fisher, Reid (1519) | Lost 0-1 | -181482 |
| 3standard | 623 | Berman, Ian (1480) | Won 2-1 | +181500 |
| 4standard | 526 | Lent, Will (1498) | Won 2-1 | +181518 |
| 5standard | 393 | Stanley, Phillip (1517) | Draw 1-1 | 01518 |
| 6standard | 482 | Mau, Daniel (1554) | Lost 1-2 | -171501 |
| top | average opponent: 1512record: 2-2-2 | new rating: 1501 | ||