Guenther, David
Current rating: 1373
Record: 10-19-2
| Grand Prix Toronto 2018 (modern) | starting rating: 1347 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 531 | Sadikian, Garabed (1430) | Won 2-0 | +201367 |
| 2modern | 97 | Tse, Chris (1518) | Lost 1-2 | -151352 |
| 3modern | 448 | Johansen, Geoffrey (1522) | Won 2-0 | +211373 |
| 4modern | 390 | Lesperance, Francois (1515) | Won 2-1 | +201393 |
| 5modern | 192 | Juliano, Christopher (1760) | Lost 0-2 | -111382 |
| 6modern | 274 | Oyen, Andrew (1669) | Lost 1-2 | -131369 |
| 7modern | 442 | Goulet, Nick (1504) | Lost 1-2 | -161353 |
| 8modern | 411 | Belanger, Patrick (1444) | Won 2-1 | +201373 |
| top | average opponent: 1545record: 4-4 | new rating: 1373 | ||
| Grand Prix Las Vegas 2017 (legacy) (legacy) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 44 | Kennedy, Quinn (1538) | Lost 1-2 | -171430 |
| 2legacy | 789 | Paquette, James (1473) | Lost 0-2 | -171413 |
| 3legacy | 1052 | Burgess, Dayton (1467) | Lost 1-2 | -171396 |
| 4legacy | 1108 | Calderon, Andrew8811 (1443) | Lost 0-2 | -171379 |
| 5legacy | 1089 | Ip, Brian (1430) | Lost 0-2 | -171362 |
| 7legacy | 909 | Consonni, Francesco (1430) | Won 2-0 | +191381 |
| 8legacy | 733 | Larsen, Devin (1430) | Lost 0-2 | -171364 |
| 9legacy | 637 | Hayes, Brook (1447) | Lost 1-2 | -171347 |
| top | average opponent: 1457record: 1-7 | new rating: 1347 | ||
| Grand Prix Toronto 2016 (SOI standard) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 374 | Boucher, Patrick (1500) | Lost 1-2 | -181464 |
| 2standard | 533 | Jolicoeur, Draven (1549) | Lost 0-2 | -171447 |
| 3standard | 698 | Pearce, Jade (1411) | Won 2-0 | +181465 |
| 4standard | 590 | Wilson, Chris (1395) | Lost 0-2 | -201445 |
| 5standard | 645 | Hoffmann, Adams (1461) | Won 2-0 | +191464 |
| 6standard | 563 | Wilson, Bill (1487) | Draw 1-1 | 01464 |
| 7standard | 503 | Deguire, Kevin (1485) | Lost 0-2 | -171447 |
| top | average opponent: 1470record: 2-4-1 | new rating: 1447 | ||
| Grand Prix Quebec City 2015 (BFZ standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 5 | Hayman, Tim (1575) | Won 2-1 | +191519 |
| 2standard | 172 | Steffe, Sebastian (1504) | Won 2-1 | +181537 |
| 3standard | 6 | Blondon, William (1614) | Lost 0-2 | -171520 |
| 4standard | 207 | Sotzky, Jason (1518) | Lost 1-2 | -181502 |
| 5standard | 286 | Fillion, Pierre (1499) | Lost 0-2 | -181484 |
| 6standard | 246 | Desaulniers, Charles (1424) | Lost 1-2 | -191465 |
| 7standard | 233 | Edmunds, Chris (1472) | Won 2-0 | +181483 |
| 8standard | 191 | Provost, Jonathan (1381) | Draw 0-0 | -11482 |
| top | average opponent: 1498record: 3-4-1 | new rating: 1482 | ||