Harbourne, Marc
Current rating: 1517
Record: 15-16
| Grand Prix Hartford 2018 (modern) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 419 | Macneal, Gavin (1500) | Lost 0-2 | -191498 |
| 2modern | 503 | Orwasher, Aaron (1518) | Won 2-1 | +191517 |
| 3modern | 437 | Campbell, Chelsea (1538) | Won 2-0 | +181535 |
| 4modern | 527 | McMahan, Brian (1509) | Lost 1-2 | -181517 |
| top | average opponent: 1516record: 2-2 | new rating: 1517 | ||
| Grand Prix Pittsburgh 2015 (modern) | starting rating: 1436 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 119 | Sweeney, Dylan (1535) | Won 2-1 | +201456 |
| 2modern | 524 | Alaimo, Sam (1555) | Won 2-1 | +201476 |
| 3modern | 299 | Alvarez, Lance (1679) | Lost 1-2 | -141462 |
| 4modern | 490 | Maddox, Thomas (1513) | Lost 0-2 | -181444 |
| 5modern | 869 | Estrella, Jeff (1499) | Won 2-0 | +191463 |
| 6modern | 655 | Pecora, Gerald (1515) | Won 2-1 | +191482 |
| 7modern | 234 | McDevitt, Michael (1539) | Won 2-0 | +191501 |
| 8modern | 212 | Cheung, Gabriel (1617) | Won 2-1 | +211522 |
| 9modern | 155 | Robinson, Connor (1593) | Won 2-0 | +191541 |
| 10modern | 74 | Hoogland, Jeff (1679) | Lost 0-2 | -161525 |
| 11modern | 148 | Burnett, Kai (1847) | Lost 1-2 | -121513 |
| 12modern | 129 | Mann, Stephen (1703) | Won 2-0 | +211534 |
| 13modern | 94 | Hernandez, Kevin (1549) | Lost 0-2 | -171517 |
| top | average opponent: 1602record: 8-5 | new rating: 1517 | ||
| Grand Prix Atlantic City 2015 (DTK limited) | starting rating: 1433 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 66 | Williams, Ashley (1452) | Won 2-0 | +181451 |
| 2sealed | 27 | McFadden, Robert (1610) | Lost 1-2 | -151436 |
| 3sealed | 544 | McConnell III, Esker (1259) | Won 2-0 | +151451 |
| 4sealed | 420 | Gish, Matt (1598) | Lost 0-2 | -161435 |
| 5sealed | 387 | Day, Aaron (1468) | Won 2-0 | +191454 |
| 6sealed | 267 | Karakarlis, Andrew (1470) | Lost 0-2 | -181436 |
| top | average opponent: 1476record: 3-3 | new rating: 1436 | ||
| Grand Prix Cleveland 2015 (FRF limited) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 342 | Slease, Jacob (1514) | Won 2-0 | +191466 |
| 2sealed | 308 | Swisher, Kyle (1519) | Won 2-1 | +191485 |
| 3sealed | 291 | Woodward, Michael (1501) | Lost 0-2 | -171468 |
| 4sealed | 433 | Mullen, Collins (1482) | Lost 1-2 | -181450 |
| 5sealed | 589 | Stackpole, Tom (1501) | Lost 1-2 | -171433 |
| top | average opponent: 1503record: 2-3 | new rating: 1433 | ||
| Grand Prix New Jersey 2014 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 1078 | Hendrickson, Steven (1500) | Lost 1-2 | -181482 |
| 2legacy | 1075 | McAleer, Jeff (1543) | Lost 0-2 | -171465 |
| 3legacy | 1285 | LaFountaine, Jamie (1463) | Lost 0-2 | -181447 |
| top | average opponent: 1502record: 0-3 | new rating: 1447 | ||