Ossiff, Michael
Current rating: 1551
Record: 17-14
| Grand Prix Seattle-Tacoma 2015 (legacy) | starting rating: 1550 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 139 | Hardwick, Richard (1436) | Won 2-1 | +161566 |
| 2legacy | 311 | Wilson, Tim S (1697) | Won 2-0 | +211587 |
| 3legacy | 1 | Brown, Eric (1857) | Lost 0-2 | -131574 |
| 4legacy | 417 | Patrick-Riley, Josh (1441) | Lost 0-2 | -211553 |
| 5legacy | 473 | Dentith, Peter (1546) | Lost 0-2 | -181535 |
| 6legacy | 652 | Kuo, Justin (1486) | Won 2-0 | +171552 |
| 7legacy | 466 | Blair, Christopher (1554) | Won 2-1 | +181570 |
| 8legacy | 335 | Smith, Brian E (1523) | Lost 1-2 | -191551 |
| top | average opponent: 1568record: 4-4 | new rating: 1551 | ||
| Grand Prix Portland 2013 (modern) | starting rating: 1591 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 203 | Ellis, Jack (1453) | Won 2-1 | +161607 |
| 2modern | 196 | Palke, Darrel (1551) | Lost 0-2 | -191588 |
| 3modern | 247 | Jonsson, Andreas (1794) | Lost 0-2 | -151573 |
| 4modern | 343 | Sugiyama, Mikey (1482) | Won 2-1 | +171590 |
| 5modern | 285 | Layher, Kris (1500) | Lost 1-2 | -201570 |
| 6modern | 355 | Pond, Matthew (1483) | Lost 0-2 | -201550 |
| top | average opponent: 1544record: 2-4 | new rating: 1550 | ||
| Grand Prix Seattle-Tacoma 2012 (DKA limited) | starting rating: 1537 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 198 | Baird, Matthew (1500) | Won 2-0 | +171554 |
| 2sealed | 178 | Casorso, Joseph (1518) | Won 2-1 | +181572 |
| 3sealed | 185 | Gleason, Ryan (1484) | Won 2-0 | +161588 |
| 4sealed | 32 | Erickson, Kyle (1500) | Won 2-0 | +171605 |
| 5sealed | 25 | Woods, Conley (2009) | Lost 0-2 | -111594 |
| 6sealed | 141 | Olsen, Brandon (1558) | Lost 0-2 | -191575 |
| 7sealed | 152 | Hagerman, Dexter (1535) | Won 2-0 | +171592 |
| 8sealed | 142 | Vall, Chevy (1573) | Lost 1-2 | -181574 |
| 9sealed | 156 | Christensen, Martin (1536) | Won 2-0 | +171591 |
| top | average opponent: 1579record: 6-3 | new rating: 1591 | ||
| Grand Prix Portland 2010 (M11 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 122 | Koenig, Ryan (1500) | Lost 1-2 | -181482 |
| 2sealed | 445 | Kleist, Kenneth A (1482) | Won 2-1 | +181500 |
| 3sealed | 208 | Burnham, Michael (1498) | Won 2-0 | +181518 |
| 4sealed | 291 | Illum, Jared (1518) | Won 2-1 | +181536 |
| 5sealed | 143 | Ward, Ryan (1591) | Won 2-0 | +191555 |
| 6sealed | 57 | Fuller, Ben [USA] (1554) | Lost 1-2 | -181537 |
| 7sealed | 139 | Maybee, Brad J (1543) | Lost 0-2 | -181519 |
| 8sealed | 201 | Chen, Bob (1518) | Won 2-1 | +181537 |
| top | average opponent: 1526record: 5-3 | new rating: 1537 | ||