Henderson, Douglas
Current rating: 1486
Record: 31-36-6
| Grand Prix Toronto 2016 (SOI standard) | starting rating: 1502 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 320 | Machado, Brian (1539) | Draw 1-1 | +11503 |
| 2standard | 372 | Rex, Zachary (1499) | Lost 0-2 | -181485 |
| 3standard | 623 | Bailey, Fabian (1481) | Won 2-0 | +181503 |
| 4standard | 509 | Clegg, Corey (1501) | Won 2-1 | +181521 |
| 5standard | 324 | Bouzane, Lawrence (1591) | Lost 0-2 | -171504 |
| 6standard | 460 | Pineda, Darryl (1503) | Lost 1-2 | -181486 |
| top | average opponent: 1519record: 2-3-1 | new rating: 1486 | ||
| Grand Prix Detroit 2016 (modern) | starting rating: 1456 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 161 | Zamba, Xander (1527) | Lost 1-2 | -171439 |
| 2modern | 1028 | Schmidt, Matthew (1463) | Lost 0-2 | -171422 |
| 3modern | 1195 | Armstrong, Jack-Daniel (1464) | Won 2-1 | +181440 |
| 4modern | 966 | Kock, Milo (1482) | Won 2-0 | +191459 |
| 5modern | 653 | Munger, Noah (1499) | Draw 1-1 | +11460 |
| 6modern | 746 | Eriksen, Matthew (1501) | Won 2-0 | +191479 |
| 7modern | 521 | Murley, Caleb (1516) | Won 2-0 | +181497 |
| 8modern | 382 | Copeland, Samuel (1668) | Lost 1-2 | -151482 |
| 9modern | 503 | Becker, Nolan (1575) | Won 2-1 | +201502 |
| top | average opponent: 1522record: 5-3-1 | new rating: 1502 | ||
| Grand Prix Toronto 2015 (DTK standard) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 282 | Chamberlain, Andrew (1520) | Lost 0-2 | -171448 |
| 3standard | 371 | Watkins, Tim (1482) | Lost 1-2 | -181430 |
| 4standard | 693 | Bloomingdale, Carson (1481) | Won 2-0 | +191449 |
| 5standard | 383 | Hum, Barry (1671) | Lost 1-2 | -141435 |
| 6standard | 508 | Rousseau, Patrice (1498) | Lost 1-2 | -171418 |
| 7standard | 428 | Huff, Gregory (1464) | Won 2-0 | +191437 |
| 8standard | 316 | Pangilinan, Arkein (1473) | Won 2-0 | +191456 |
| 9standard | 247 | McCormick, Greg (1451) | Draw 1-1 | 01456 |
| top | average opponent: 1505record: 3-4-1 | new rating: 1456 | ||
| Grand Prix Boston-Worcester 2014 (modern) | starting rating: 1455 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 308 | Higgins, Ryan (1500) | Lost 1-2 | -171438 |
| 2modern | 433 | Albino, Stafford (1458) | Draw 1-1 | 01438 |
| 3modern | 487 | Bence, Chris (1481) | Won 2-0 | +191457 |
| 4modern | 373 | Peacock, Eric (1519) | Lost 0-2 | -171440 |
| 5modern | 458 | Zhen, Jimmy (1611) | Lost 1-2 | -151425 |
| 6modern | 425 | Bruce, Nathan (1535) | Won 2-0 | +201445 |
| 7modern | 323 | Pullen, Patrick (1484) | Won 2-0 | +191464 |
| 8modern | 236 | Perry, RJ (1446) | Lost 0-2 | -181446 |
| 9modern | 200 | Shen, Xiangyu (1506) | Won 2-1 | +191465 |
| top | average opponent: 1505record: 4-4-1 | new rating: 1465 | ||
| Grand Prix Richmond 2014 (modern) | starting rating: 1411 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 179 | Williams, Sam (1666) | Won 2-1 | +231434 |
| 4modern | 68 | Cahill, Steve (1672) | Lost 1-2 | -141420 |
| 5modern | 198 | Desveaux, Marcel (1535) | Won 2-1 | +201440 |
| 6modern | 124 | Braun-Duin, Brian (1861) | Lost 0-2 | -111429 |
| 7modern | 128 | Flinn, Ian (1583) | Won 2-0 | +211450 |
| 8modern | 140 | Ross, Robert (1538) | Lost 0-2 | -161434 |
| 9modern | 141 | Cagwin, Evan (1611) | Won 2-0 | +211455 |
| top | average opponent: 1638record: 4-3 | new rating: 1455 | ||
| Grand Prix Toronto 2013 (THS limited) | starting rating: 1459 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 301 | Giancoulas, Donald (1631) | Lost 0-2 | -151444 |
| 3sealed | 551 | Whitsitt, Steven (1500) | Won 2-0 | +191463 |
| 4sealed | 273 | Kraus, David (1486) | Won 2-0 | +181481 |
| 5sealed | 209 | Voakes, James (1519) | Lost 0-2 | -171464 |
| 6sealed | 419 | RITSMA, JOE B (1517) | Lost 1-2 | -171447 |
| 7sealed | 395 | Savard, Jean-Philippe (1500) | Draw 1-1 | +11448 |
| 8sealed | 46 | Courtemanche, Matt (1400) | Lost 1-2 | -191429 |
| 9sealed | 73 | Leavitt, Ciaran Llachlan (1449) | Lost 1-2 | -181411 |
| top | average opponent: 1500record: 2-5-1 | new rating: 1411 | ||
| Grand Prix Detroit 2013 (modern) | starting rating: 1474 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 257 | Richter, Brian (1499) | Lost 0-2 | -171457 |
| 2modern | 505 | Veto, Matthew (1482) | Lost 0-0 | -181439 |
| 3modern | 600 | Arrowsmith, Michael (1346) | Won 2-0 | +161455 |
| 4modern | 544 | Jenks, Tyler (1449) | Won 2-0 | +181473 |
| 5modern | 505 | Pedersen, Chris (1518) | Won 2-1 | +191492 |
| 6modern | 286 | Giancoulas, Donald (1599) | Lost 0-2 | -161476 |
| 7modern | 417 | Carino, Joseph (1501) | Lost 0-0 | -181458 |
| 8modern | 330 | Slater, Zac (1437) | Lost 1-2 | -181440 |
| 9modern | 316 | Booker, James (1472) | Won 2-0 | +191459 |
| top | average opponent: 1478record: 4-5 | new rating: 1459 | ||
| Grand Prix Toronto 2012 (modern) | starting rating: 1409 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 204 | Lewis, Ethan (1500) | Won 2-1 | +191428 |
| 2modern | 44 | Arsenault, Frederique (1500) | Lost 0-2 | -161412 |
| 3modern | 227 | Cooper, Stacey (1432) | Won 2-0 | +181430 |
| 4modern | 159 | Williams, Matt S (1517) | Won 2-0 | +201450 |
| 5modern | 180 | Morton, Collin (1535) | Lost 1-2 | -171433 |
| 6modern | 291 | Hatch, Benjamin W (1473) | Lost 1-2 | -171416 |
| 7modern | 245 | Tran, Simon (1482) | Won 2-1 | +191435 |
| 8modern | 174 | Berry, Evan (1519) | Won 2-0 | +201455 |
| 9modern | 140 | Stoyles, Chris (1531) | Won 2-1 | +191474 |
| top | average opponent: 1499record: 6-3 | new rating: 1474 | ||
| Grand Prix Toronto 2006 (DIS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 72 | Bilarczyk, Andrew (1481) | Draw 1-1 | 01500 |
| 2sealed | 127 | Burkhart, Nick (1500) | Lost 1-2 | -181482 |
| 3sealed | 180 | Errygers, Mitchell (1482) | Won 2-1 | +181500 |
| 4sealed | 154 | Stoddart, Darrell W (1500) | Lost 0-2 | -181482 |
| 5sealed | 162 | Noworaj, Anna (1482) | Lost 0-2 | -181464 |
| 6sealed | 137 | Fischer, Jeff (1396) | Lost 0-2 | -201444 |
| 7sealed | 116 | Currie, Drew P (1445) | Lost 1-2 | -181426 |
| 8sealed | 91 | Hon, Andy (1446) | Lost 1-2 | -171409 |
| top | average opponent: 1467record: 1-6-1 | new rating: 1409 | ||