Blackborow, Josh
Current rating: 1659
Record: 33-23
| Grand Prix Providence 2016 (KLD standard) | starting rating: 1680 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 280 | Hollenbeck, Luke (1482) | Won 2-0 | +141694 |
| 2standard | 27 | Papp, Michael (1520) | Won 2-1 | +151709 |
| 3standard | 60 | Orabona, Scott (1577) | Lost 1-2 | -201689 |
| 4standard | 161 | Hurst, Alex (1590) | Lost 0-2 | -201669 |
| 5standard | 310 | Fang, Kevin (1579) | Won 2-0 | +161685 |
| 6standard | 340 | Campen, Steve (1493) | Lost 0-2 | -211664 |
| 7standard | 285 | Naipier-Kane, Jeffrey (1502) | Won 2-1 | +151679 |
| 8standard | 254 | Cailloux, Jacob (1598) | Lost 1-2 | -201659 |
| top | average opponent: 1543record: 4-4 | new rating: 1659 | ||
| Grand Prix Montreal 2015 (DTK limited) | starting rating: 1647 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 308 | VanSchaik, Brian (1472) | Won 2-1 | +151662 |
| 2sealed | 271 | Ma, Liem (1518) | Won 2-0 | +151677 |
| 3sealed | 185 | Holiday, Nathan (2021) | Lost 0-2 | -121665 |
| 4sealed | 354 | Mazzurco, Christopher (1453) | Won 2-0 | +141679 |
| 5sealed | 111 | Hood, Allen (1486) | Won 2-0 | +151694 |
| 6sealed | 120 | Hawkins, Andrew (1594) | Won 2-1 | +161710 |
| 7sealed | 25 | Moulton, Jesse (1859) | Lost 1-2 | -151695 |
| 8sealed | 104 | Feingersh, Rachel (1860) | Lost 0-2 | -151680 |
| top | average opponent: 1658record: 5-3 | new rating: 1680 | ||
| Grand Prix Providence 2015 (DTK standard) | starting rating: 1599 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 58 | Yue, Jen (1446) | Lost 1-2 | -211578 |
| 2standard | 244 | Aldrich, Jonathan (1488) | Won 2-1 | +171595 |
| 3standard | 402 | Ortiz, Walter (1473) | Won 2-1 | +161611 |
| 4standard | 288 | Simpson, Cody (1480) | Won 2-0 | +151626 |
| 5standard | 106 | Ellis, Jason (1782) | Lost 0-2 | -151611 |
| 6standard | 192 | Belknap, Graham (1527) | Won 2-0 | +171628 |
| 7standard | 155 | Corney, Derrick (1634) | Won 2-1 | +181646 |
| 8standard | 112 | Smolensky, Nathan (1544) | Won 2-0 | +161662 |
| 9standard | 49 | Kassis, Eli (1839) | Lost 0-0 | -151647 |
| top | average opponent: 1579record: 6-3 | new rating: 1647 | ||
| Grand Prix Boston-Worcester 2014 (modern) | starting rating: 1606 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 57 | Behre, Chad (1538) | Won 2-0 | +171623 |
| 4modern | 120 | Breau, Josh (1588) | Won 2-0 | +171640 |
| 5modern | 16 | Babcock, Brandon (1555) | Lost 1-2 | -201620 |
| 6modern | 140 | Delaurier, Matt (1439) | Lost 1-2 | -211599 |
| 7modern | 169 | Douglass, Andrew (1562) | Won 2-0 | +171616 |
| 8modern | 130 | Leger, Philippe (1661) | Lost 1-2 | -171599 |
| top | average opponent: 1557record: 3-3 | new rating: 1599 | ||
| Grand Prix Montreal 2014 (BNG limited) | starting rating: 1557 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 474 | Cole, James (1645) | Won 2-1 | +191576 |
| 2sealed | 180 | Funchion, John (1378) | Won 2-0 | +151591 |
| 3sealed | 41 | Robdrup, Andy (1627) | Won 2-0 | +181609 |
| 4sealed | 254 | Labelle, Olivier (1515) | Won 2-0 | +171626 |
| 5sealed | 227 | Ochoa, David (1818) | Lost 0-2 | -151611 |
| 6sealed | 217 | Matthews, Mark (1565) | Won 2-1 | +171628 |
| 7sealed | 30 | Durney, Ryan (1522) | Lost 0-2 | -201608 |
| 8sealed | 108 | Butterfield, Nathaniel (1519) | Won 2-0 | +171625 |
| 9sealed | 67 | Drouin, Simon (1572) | Lost 0-2 | -191606 |
| top | average opponent: 1574record: 6-3 | new rating: 1606 | ||
| Grand Prix Boston-Worcester 2012 (M13 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 431 | Rafferty, Dillon (1500) | Won 2-1 | +181518 |
| 2sealed | 183 | Cormier, Francis (1754) | Lost 1-2 | -141504 |
| 3sealed | 433 | Maimone, Matt (1501) | Won 2-1 | +181522 |
| 4sealed | 357 | Meier, Dave (1711) | Won 2-1 | +221544 |
| 5sealed | 281 | Botteon, Michael (1561) | Won 2-1 | +181562 |
| 6sealed | 84 | Butler, Troy V (1562) | Lost 1-2 | -181544 |
| 7sealed | 303 | Brecher, Doug (1541) | Won 2-1 | +181562 |
| 8sealed | 222 | Martell, Tom (1989) | Won 2-0 | +251587 |
| 9sealed | 60 | Richards, John (1567) | Won 2-0 | +181605 |
| 10sealed | 102 | James, Deondre (1598) | Lost 0-2 | -181587 |
| 11draft | 47 | Carty, Chris (1624) | Won 2-0 | +181605 |
| 12draft | 104 | Quigley, Sean (1612) | Lost 0-2 | -181587 |
| 13draft | 56 | Hedges, Michael (1723) | Lost 1-2 | -151572 |
| 14draft | 110 | Chen, Jiayi (1723) | Lost 1-2 | -151557 |
| 15draft | 97 | Coyne, Chris P (1568) | Won 2-1 | +181575 |
| 16draft | 72 | Gorin, Vadim (1567) | Lost 0-2 | -181557 |
| top | average opponent: 1631record: 9-7 | new rating: 1557 | ||