Sammons, David
Current rating: 1556
| Grand Prix Birmingham 2017 (modern) | starting rating: 1515 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 196 | Sinfield, Ashley (1501) | Won 2-0 | +171532 |
| 2modern | 303 | Le Francois, Remi (1661) | Lost 0-0 | -151517 |
| 3modern | 499 | Okland, Disa (1497) | Lost 0-2 | -191498 |
| 4modern | 629 | Gunner, Michael (1375) | Won 2-1 | +161514 |
| 5modern | 465 | Seccombe, Charles (1463) | Won 2-0 | +171531 |
| 6modern | 346 | Crusafio, Vincenzo (1656) | Draw 1-1 | +21533 |
| 7modern | 388 | France, Adam (1498) | Won 2-0 | +181551 |
| 8modern | 265 | Kruijthoff, Niels (1469) | Won 2-0 | +161567 |
| 9modern | 173 | Dagen, Pierre (1941) | Lost 0-2 | -111556 |
| top | average opponent: 1562record: 5-3-1 | new rating: 1556 | ||
| Grand Prix London 2016 (KLD limited) | starting rating: 1472 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 518 | Koparal, Canberk (1500) | Won 2-0 | +191491 |
| 2sealed | 97 | Gills, Marcus (1518) | Lost 1-2 | -181473 |
| 3sealed | 824 | Larsen, Soren (1508) | Won 2-1 | +191492 |
| 4sealed | 762 | Hills, Nathan (1519) | Won 2-0 | +181510 |
| 5sealed | 156 | Paice, Rheece (1553) | Won 2-0 | +191529 |
| 6sealed | 85 | Hume, Alexander (1551) | Lost 1-2 | -171512 |
| 7sealed | 478 | Chandler, Vincent (1511) | Won 2-0 | +181530 |
| 8sealed | 279 | Buckland, Sam (1608) | Won 2-0 | +191549 |
| 9sealed | 88 | Buchan, Joshua (1504) | Won 2-0 | +171566 |
| 10draft | 118 | McNulty, Cameron (1633) | Lost 1-2 | -171549 |
| 11draft | 186 | Krieger, Philipp (1555) | Lost 0-2 | -171532 |
| 12draft | 277 | Whytock, Calum (1555) | Lost 1-2 | -181514 |
| 13draft | 138 | Gay, Benjamin (1510) | Won 2-0 | +181532 |
| 14draft | 264 | Hale, Richard (1565) | Lost 1-2 | -171515 |
| top | average opponent: 1542record: 8-6 | new rating: 1515 | ||
| Grand Prix London 2015 (ORI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 501 | Nilsson, Rasmus (1827) | Won 2-1 | +241524 |
| 2standard | 810 | Pettersson, Tobias (1523) | Lost 1-2 | -181506 |
| 3standard | 898 | Picker, Ian (1498) | Lost 1-2 | -181488 |
| 4standard | 899 | Jancik, Tom (1506) | Lost 1-2 | -181470 |
| 5standard | 996 | Catana, Ciprian (1604) | Draw 1-1 | +21472 |
| top | average opponent: 1592record: 1-3-1 | new rating: 1472 | ||