Vachon, David
Current rating: 1643
Record: 29-25-7
| Grand Prix Toronto 2017 (HOU limited) | starting rating: 1552 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 196 | Harabas, Chris (1623) | Won 2-0 | +201572 |
| 3sealed | 90 | Helbig, Drew (1929) | Lost 0-2 | -121560 |
| 4sealed | 252 | Qian, Jason (1806) | Won 2-0 | +221582 |
| 5sealed | 141 | Gobeyl, Charles Kevin (1541) | Won 2-1 | +171599 |
| 6sealed | 126 | Mcintosh, Chris (1563) | Lost 0-2 | -181581 |
| 7sealed | 263 | Balducci, Tommas (1433) | Lost 1-2 | -211560 |
| 8sealed | 255 | Henry, Brenton (1656) | Won 2-1 | +201580 |
| 9sealed | 257 | Chabot, David (1485) | Won 2-0 | +161596 |
| 10draft | 180 | Pileggi, Riccardo (1764) | Won 2-0 | +211617 |
| 11draft | 28 | Seguin, Shawn (1669) | Lost 0-2 | -171600 |
| 12draft | 142 | Sinopoli, Bradley (1526) | Won 2-0 | +171617 |
| 13draft | 61 | Fung, Alan (1596) | Won 2-0 | +171634 |
| 14draft | 111 | Gauthier, Martin-Eric (1970) | Won 2-1 | +241658 |
| 15draft | 81 | D'Ambrose, Nicolas (1820) | Lost 0-2 | -151643 |
| top | average opponent: 1670record: 9-5 | new rating: 1643 | ||
| Grand Prix Las Vegas 2017 (limited) (AKH limited) | starting rating: 1477 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 343 | Guggemos, Jim (1527) | Won 2-1 | +191496 |
| 3sealed | 12 | Ho-Ten-Pow, Marino (1669) | Lost 1-2 | -151481 |
| 4sealed | 395 | Garvin, Andrew (1637) | Draw 1-1 | +21483 |
| 5sealed | 539 | Mohr, Toni (1506) | Won 2-1 | +191502 |
| 6sealed | 352 | Castillo, Zaryn (1703) | Lost 0-2 | -141488 |
| 7sealed | 505 | Tetlow, Adam (1699) | Won 2-1 | +211509 |
| 8sealed | 353 | Vega Parra, Francisco (1557) | Won 2-0 | +191528 |
| 9sealed | 234 | Cornett, Joshua (1521) | Won 2-0 | +181546 |
| 10draft | 113 | Pallares, Ismael (1597) | Lost 1-2 | -171529 |
| 11draft | 102 | He, Daniel (1588) | Lost 0-2 | -171512 |
| 13draft | 109 | He, Daniel (1587) | Won 2-1 | +191531 |
| 14draft | 44 | Bass, Chris (1594) | Won 2-1 | +201551 |
| 15draft | 168 | Benner, James (1645) | Draw 1-1 | +11552 |
| top | average opponent: 1602record: 7-4-2 | new rating: 1552 | ||
| Grand Prix Richmond 2017 (AKH limited) | starting rating: 1454 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 427 | Irvin, Joseph (1430) | Lost 0-2 | -181436 |
| 2sealed | 469 | Harris, Benjamin (1495) | Lost 1-2 | -171419 |
| 3sealed | 686 | Keck, Frederick (1467) | Lost 0-2 | -171402 |
| 4sealed | 742 | Brown, Mark (1295) | Won 2-0 | +161418 |
| 5sealed | 629 | Sipe, Roger (1481) | Lost 1-2 | -171401 |
| 6sealed | 631 | McDowell, Steven (1444) | Won 2-0 | +191420 |
| 7sealed | 558 | Festin, David (1386) | Won 2-0 | +171437 |
| 8sealed | 476 | Conner, Nick (1490) | Won 2-0 | +191456 |
| 9sealed | 378 | Corbin, Julia (1586) | Won 2-0 | +211477 |
| top | average opponent: 1453record: 5-4 | new rating: 1477 | ||
| Grand Prix Milwaukee 2016 (KLD limited) | starting rating: 1421 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 231 | Lavrenz, Joe (1683) | Lost 1-2 | -131408 |
| 2sealed | 515 | Gassen, Nathan (1480) | Won 2-1 | +191427 |
| 3sealed | 317 | Dagang, Jerome (1498) | Won 2-0 | +191446 |
| 4sealed | 342 | Choi, Jungje (1557) | Lost 1-2 | -161430 |
| 5sealed | 424 | Thor, Thown (1501) | Lost 1-2 | -161414 |
| 6sealed | 408 | Levi, Daniel (1473) | Lost 1-2 | -171397 |
| 7sealed | 446 | Skrenes, Aaron (1473) | Won 2-0 | +191416 |
| 8sealed | 353 | Santomauro, Michael (1481) | Won 2-0 | +191435 |
| 9sealed | 280 | Tran, Kenwon (1497) | Won 2-0 | +191454 |
| top | average opponent: 1516record: 5-4 | new rating: 1454 | ||
| Grand Prix Montreal 2016 (EMN limited) | starting rating: 1427 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2126 | Laurendeau-Trudel, Thierry (1541) | Won 2-0 | +211448 |
| 2sealed | 2273 | Morin, Jean-Christophe (1556) | Lost 0-2 | -161432 |
| 3sealed | 2468 | Shank, David (1497) | Draw 0-0 | +11433 |
| 4sealed | 2413 | Michaud, Paul (1503) | Draw 1-1 | +11434 |
| 5sealed | 2461 | Le May, Daniel (1482) | Won 2-1 | +191453 |
| 6sealed | 2812 | Lambert, Gabriel (1518) | Draw 1-1 | +11454 |
| 7sealed | 2377 | Maassen, Nick (1573) | Lost 1-2 | -161438 |
| 8sealed | 2813 | Worthington, Cleve (1481) | Lost 0-0 | -171421 |
| top | average opponent: 1519record: 2-3-3 | new rating: 1421 | ||
| Grand Prix Boston 2005 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 179 | Cole, Phil (1482) | Draw 1-1 | 01500 |
| 2extended | 187 | Flynn, Patrick (1504) | Lost 0-2 | -181482 |
| 3extended | 266 | Wang, Ziteng (1464) | Won 2-1 | +171499 |
| 4extended | 218 | Roiter, Andrew (1501) | Draw 1-1 | 01499 |
| 5extended | 240 | McWhaw, Andrew (1519) | Lost 0-2 | -171482 |
| 6extended | 220 | Messina, Jp (1481) | Lost 0-2 | -181464 |
| 7extended | 182 | Nadig, Nischal (1447) | Lost 0-2 | -191445 |
| 8extended | 146 | Chau, David (1446) | Lost 0-2 | -181427 |
| top | average opponent: 1480record: 1-5-2 | new rating: 1427 | ||