Buchanan, Nathan
Current rating: 1558
Record: 49-42-1
| Grand Prix Toronto 2017 (HOU limited) | starting rating: 1608 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 178 | Beach, Corey (1482) | Lost 1-2 | -201588 |
| 3sealed | 305 | Jeromkin, Nikolas (1493) | Lost 0-2 | -201568 |
| 4sealed | 446 | Lanza, Joshua (1487) | Lost 1-2 | -191549 |
| 5sealed | 518 | Osborne, Ryan (1469) | Won 2-1 | +161565 |
| 6sealed | 419 | Rogers, Nate (1486) | Lost 1-2 | -191546 |
| 7sealed | 459 | Leung, Jason (1407) | Won 2-0 | +151561 |
| 8sealed | 375 | Clark, Bradley (1485) | Lost 0-2 | -191542 |
| 9sealed | 327 | Gudmundsen, Kathleen (1471) | Won 2-0 | +161558 |
| top | average opponent: 1473record: 3-5 | new rating: 1558 | ||
| Grand Prix Montreal 2017 (AKH standard) | starting rating: 1649 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 2073 | St-Laurent, Jerome (1646) | Won 2-1 | +181667 |
| 3standard | 2073 | Topping, Greg (1614) | Lost 1-2 | -191648 |
| 4standard | 2073 | Pelekanakis, George (1507) | Lost 1-2 | -201628 |
| 5standard | 2073 | Herdzik, Eric (1544) | Lost 1-2 | -201608 |
| top | average opponent: 1578record: 1-3 | new rating: 1608 | ||
| Grand Prix Montreal 2016 (EMN limited) | starting rating: 1666 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 2172 | Caron, Antoine (1558) | Lost 1-2 | -201646 |
| 3sealed | 2417 | Kisner, Eric (1502) | Draw 0-0 | -21644 |
| 4sealed | 2404 | Champagne, Simon (1500) | Won 2-1 | +151659 |
| 5sealed | 2273 | Kohler, Nathan (1517) | Lost 1-2 | -201639 |
| 6sealed | 2362 | Rinaldi, Steven (1496) | Won 2-1 | +151654 |
| 7sealed | 2275 | Maassen, Philip (1479) | Won 2-0 | +151669 |
| 8sealed | 2185 | Dugal, Andrew (1575) | Lost 0-0 | -201649 |
| top | average opponent: 1518record: 3-3-1 | new rating: 1649 | ||
| Grand Prix Toronto 2016 (SOI standard) | starting rating: 1619 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 36 | Dow, Shae (1557) | Won 2-0 | +171636 |
| 3standard | 4 | Sacks, Neal (1756) | Lost 1-2 | -161620 |
| 4standard | 1052 | Barber, Randall (1519) | Won 2-0 | +171637 |
| 5standard | 116 | Blanchette, Jamie (1760) | Lost 0-2 | -161621 |
| 6standard | 251 | Tiu, Oliver (2114) | Lost 1-2 | -101611 |
| 7standard | 456 | Sato, Taichi (1473) | Won 2-1 | +161627 |
| 8standard | 328 | Payano, Virgilio (1508) | Won 2-0 | +161643 |
| 9standard | 205 | Guay-Provost, Philippe (1520) | Won 2-0 | +151658 |
| 10standard | 180 | Hawron, Richard (1667) | Won 2-1 | +181676 |
| 11standard | 155 | Albert, Levi (1583) | Lost 0-2 | -191657 |
| 12standard | 165 | Conway, Mikhael (1551) | Won 2-0 | +161673 |
| 13standard | 126 | McLaughlin, Morgan (1823) | Won 2-0 | +211694 |
| 14standard | 25 | Kassis, Eli (1832) | Lost 0-2 | -161678 |
| 15standard | 107 | Tharmaratnam, Samuel (2040) | Lost 0-2 | -121666 |
| top | average opponent: 1693record: 8-6 | new rating: 1666 | ||
| Grand Prix Quebec City 2015 (BFZ standard) | starting rating: 1633 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 126 | Poisson, David (1487) | Lost 1-2 | -201613 |
| 3standard | 317 | DAuteuil, Miguel (1470) | Lost 0-2 | -211592 |
| 4standard | 283 | Lavigne, Mario (1447) | Won 2-0 | +151607 |
| 5standard | 35 | Mahon, Travis (1503) | Won 2-1 | +171624 |
| 6standard | 180 | Jami, Kaaveh (1516) | Won 2-0 | +161640 |
| 7standard | 154 | Moazen-Sayad, Pedram (1521) | Lost 1-2 | -211619 |
| top | average opponent: 1491record: 3-3 | new rating: 1619 | ||
| Grand Prix Montreal 2015 (DTK limited) | starting rating: 1623 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 67 | Lockhart, Joe (1520) | Won 2-1 | +161639 |
| 3sealed | 208 | Gertridge, Levi (1536) | Won 2-0 | +161655 |
| 4sealed | 97 | Wescoe, Craig (1971) | Won 2-0 | +231678 |
| 5sealed | 48 | Allegrucci, Thierry (1484) | Won 2-0 | +151693 |
| 6sealed | 10 | Marchesano, Ernest (1594) | Lost 1-2 | -201673 |
| 7sealed | 86 | Belanger, Vincent (1582) | Lost 1-2 | -201653 |
| 8sealed | 89 | Gravel, Gabriel (1532) | Lost 0-2 | -201633 |
| top | average opponent: 1603record: 4-3 | new rating: 1633 | ||
| Grand Prix Toronto 2015 (DTK standard) | starting rating: 1651 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 247 | Luong, Lucky (1536) | Won 2-1 | +161667 |
| 4standard | 140 | LaPlante, Ryan (1586) | Lost 1-2 | -191648 |
| 5standard | 308 | Chan, Philip (1521) | Won 2-0 | +151663 |
| 6standard | 53 | Flynn, Erich (1551) | Lost 1-2 | -201643 |
| 7standard | 201 | Hilson, Ian (1626) | Won 2-0 | +181661 |
| 8standard | 185 | Giraldeau, Renaud (1461) | Lost 0-2 | -221639 |
| 9standard | 171 | Naylor, Jamie (1701) | Lost 0-2 | -161623 |
| top | average opponent: 1569record: 3-4 | new rating: 1623 | ||
| Grand Prix Ottawa 2014 (KTK limited) | starting rating: 1632 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 51 | Belanger, Maxim (1674) | Lost 0-2 | -171615 |
| 4sealed | 237 | Jones, Chris Y (1519) | Won 2-0 | +161631 |
| 5sealed | 188 | Bielinski, Adam (1535) | Won 2-0 | +161647 |
| 6sealed | 150 | Lax, Ari (2121) | Lost 0-2 | -91638 |
| 7sealed | 188 | Allinson, Chris (1634) | Won 2-0 | +171655 |
| 8sealed | 92 | LaCroix, Matt (1545) | Lost 0-2 | -201635 |
| 9sealed | 153 | Marsh, Dale (1520) | Won 2-0 | +161651 |
| top | average opponent: 1650record: 4-3 | new rating: 1651 | ||
| Grand Prix Boston-Worcester 2014 (modern) | starting rating: 1594 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 1105 | Pare, Eric (1614) | Lost 1-2 | -181576 |
| 2modern | 1114 | McCloskey, Andrew (1444) | Won 2-0 | +161592 |
| 3modern | 1143 | Wollmann, Nicholas (1500) | Won 2-0 | +161608 |
| 4modern | 1007 | O'Shea, Andrew (1484) | Lost 1-2 | -201588 |
| 5modern | 1068 | Wilkinson, Jeffrey (1478) | Won 2-1 | +161604 |
| 6modern | 868 | Hodgson, Craig (1460) | Won 2-1 | +151619 |
| 7modern | 920 | Cotrupe, Matthew (1525) | Won 2-1 | +171636 |
| 8modern | 808 | Hacker, Ian (1552) | Lost 0-2 | -201616 |
| 9modern | 818 | Gurevych, William (1515) | Won 2-1 | +161632 |
| top | average opponent: 1508record: 6-3 | new rating: 1632 | ||
| Grand Prix Toronto 2013 (THS limited) | starting rating: 1548 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 451 | Bester, Wesley (1500) | Won 2-0 | +171565 |
| 2sealed | 212 | Merson, Hugh (1518) | Won 2-0 | +171582 |
| 3sealed | 178 | Myatt, Jason (1474) | Lost 1-2 | -201562 |
| 4sealed | 458 | LaCroix, Matt (1517) | Won 2-0 | +171579 |
| 5sealed | 312 | Beauchamp, Mark (1554) | Won 2-1 | +181597 |
| 6sealed | 136 | Wan, Jeffrey (1494) | Lost 0-2 | -201577 |
| 7sealed | 227 | Groen, Joshua (1438) | Won 2-1 | +151592 |
| 8sealed | 162 | Wells, Venu (1623) | Won 2-1 | +191611 |
| 9sealed | 84 | Swaluk, Jeff (1670) | Lost 0-2 | -171594 |
| top | average opponent: 1532record: 6-3 | new rating: 1594 | ||
| Grand Prix Toronto 2012 (modern) | starting rating: 1541 | |||
| round | table | opponent (rating) | result | Δrating |
| 4modern | 255 | Sharfman, David (1759) | Lost 0-2 | -141527 |
| 5modern | 199 | Yarrow, Ivy (1736) | Lost 1-2 | -151512 |
| 6modern | 207 | Bathurst, Scott (1419) | Won 2-0 | +171529 |
| 7modern | 160 | Wasson, John (1520) | Lost 0-2 | -191510 |
| 8modern | 196 | Huska, Andrew (1607) | Won 2-0 | +201530 |
| 9modern | 134 | LaDouceur, Christian (1493) | Won 2-1 | +181548 |
| top | average opponent: 1589record: 3-3 | new rating: 1548 | ||
| Grand Prix Montreal 2011 (M12 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 379 | Abuhashish, Jamie (1500) | Lost 0-2 | -181482 |
| 2sealed | 518 | Neron, Joel (1481) | Won 2-0 | +181500 |
| 3sealed | 508 | Morway, Jamie Joy (1500) | Won 2-1 | +181518 |
| 4sealed | 474 | Dang Quang, Hien (1520) | Won 2-0 | +181536 |
| 5sealed | 425 | Anderson, Marc (1581) | Lost 1-2 | -171519 |
| 6sealed | 458 | Coyne, Chris P (1497) | Won 2-1 | +171536 |
| 7sealed | 426 | Janjanian, Armen (1538) | Won 2-0 | +181554 |
| 8sealed | 396 | Cormier, Francis (1787) | Lost 0-2 | -131541 |
| top | average opponent: 1550record: 5-3 | new rating: 1541 | ||