Groom, Jeffrey
Current rating: 1620
| Grand Prix Niagara Falls 2019 (legacy) | starting rating: 1614 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 215 | Wilson, Herbert (1521) | Won 2-1 | +171631 |
| 2legacy | 144 | Formichella, Ethan (1645) | Lost 1-2 | -181613 |
| 3legacy | 283 | Drummond, Bryn (1610) | Won 2-0 | +181631 |
| 4legacy | 225 | Hamilton, John Ryan (1538) | Lost 0-2 | -201611 |
| 5legacy | 301 | Palmer, Kenneth (1413) | Won 2-1 | +151626 |
| 6legacy | 249 | Humphrey, Stephen (1495) | Won 2-0 | +151641 |
| 7legacy | 202 | Shaw, Wesley (1436) | Lost 0-2 | -211620 |
| top | average opponent: 1523record: 4-3 | new rating: 1620 | ||
| Grand Prix Quebec City 2015 (BFZ standard) | starting rating: 1508 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 85 | O'Brien, Matt (1683) | Won 2-1 | +211529 |
| 4standard | 21 | Bujold, Francis (1540) | Won 2-0 | +181547 |
| 5standard | 21 | Hoffmann, Matthew (1691) | Won 2-1 | +211568 |
| 6standard | 11 | Delanoix, Emmanuel (1515) | Lost 1-2 | -191549 |
| 7standard | 18 | Karpukhin, Mikhail (1632) | Won 2-1 | +191568 |
| 8standard | 17 | Corey, Blair (1604) | Won 0-0 | +191587 |
| 9standard | 5 | Stein, Joe (1565) | Won 2-0 | +181605 |
| 10standard | 7 | Watkins, Tim (1625) | Lost 1-2 | -181587 |
| 11standard | 13 | Delano, Jonathan (1647) | Lost 0-2 | -171570 |
| 12standard | 30 | Barge, Carter (1624) | Won 2-1 | +191589 |
| 13standard | 24 | Latendresse, Michel (1583) | Lost 0-2 | -181571 |
| 14standard | 30 | Frappier, Emile (1603) | Won 2-1 | +181589 |
| 15standard | 19 | Moir, Ben (1991) | Won 2-1 | +251614 |
| top | average opponent: 1639record: 9-4 | new rating: 1614 | ||
| Grand Prix Toronto 2015 (DTK standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 347 | Hitchon, Larry (1500) | Won 2-0 | +181518 |
| 2standard | 253 | Walderman, Leslie (1530) | Draw 1-1 | 01518 |
| 3standard | 333 | Bourdeau, Jonathan (1584) | Lost 0-2 | -171501 |
| 4standard | 497 | Finn, Gerrit (1500) | Won 2-0 | +181519 |
| 5standard | 354 | Tse, Felix (1897) | Lost 1-2 | -111508 |
| 6standard | 461 | Butler, Adam (1501) | Won 2-1 | +181526 |
| 7standard | 330 | Doehl, Curtis (1523) | Lost 0-2 | -181508 |
| top | average opponent: 1577record: 3-3-1 | new rating: 1508 | ||