Schaffert, David
Current rating: 1450
Record: 14-20
| Grand Prix Prague 2019 (UMA limited) | starting rating: 1432 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 560 | Richard, Jefferson (1677) | Won 2-1 | +221454 |
| 2sealed | 419 | Hoel, Mads (1594) | Lost 0-2 | -151439 |
| 3sealed | 574 | Dupont, Charles (1539) | Won 2-1 | +201459 |
| 4sealed | 401 | Leupold, Kim (1519) | Won 2-1 | +191478 |
| 5sealed | 390 | Viniczai, Tibor (1706) | Lost 1-2 | -141464 |
| 6sealed | 550 | Rosenberger, Alexander (1727) | Lost 1-2 | -141450 |
| top | average opponent: 1627record: 3-3 | new rating: 1450 | ||
| Grand Prix Warsaw 2017 (XLN standard) | starting rating: 1437 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 93 | Dix, Taylor (1500) | Lost 1-2 | -171420 |
| 2standard | 361 | Bartyka, Szymon (1483) | Won 2-1 | +201440 |
| 3standard | 449 | Maciejewski, Mikolaj (1500) | Won 2-1 | +191459 |
| 4standard | 237 | Van Hauwermeiren, Niels (1469) | Lost 0-2 | -181441 |
| 5standard | 472 | Giorgio, Francesco (1978) | Lost 1-2 | -91432 |
| top | average opponent: 1586record: 2-3 | new rating: 1432 | ||
| Grand Prix Utrecht 2017 (AER standard) | starting rating: 1460 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 110 | Alberola, Victor (1598) | Lost 1-2 | -151445 |
| 2standard | 375 | Verner, Lukas (1472) | Won 2-1 | +181463 |
| 3standard | 446 | Dinescu, Fabian (1737) | Lost 0-2 | -131450 |
| 4standard | 553 | Nolte, Dennis (1752) | Lost 1-2 | -131437 |
| top | average opponent: 1640record: 1-3 | new rating: 1437 | ||
| Grand Prix Paris 2016 (OGW standard) | starting rating: 1470 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 351 | Sablin, Kyryl (1568) | Lost 0-2 | -171453 |
| 2standard | 512 | Fernandez, Anthony (1549) | Won 2-1 | +201473 |
| 3standard | 601 | Wiese, Michael (1551) | Lost 0-2 | -161457 |
| 4standard | 592 | Tseroulis, Kreon (1485) | Won 2-1 | +181475 |
| 5standard | 475 | Griffin, Jordan (1473) | Lost 0-2 | -181457 |
| 6standard | 565 | Niethammer, Felix (1605) | Won 2-1 | +211478 |
| 7standard | 494 | Wigg, Jason (1499) | Lost 0-2 | -181460 |
| top | average opponent: 1533record: 3-4 | new rating: 1460 | ||
| Grand Prix Brussels 2015 (BFZ standard) | starting rating: 1522 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 412 | Hauser, Valentin (1631) | Lost 0-0 | -161506 |
| 2standard | 476 | Phizacklea, Andrew (1482) | Lost 0-0 | -181488 |
| 3standard | 886 | Minahan, Keane (1466) | Lost 0-2 | -181470 |
| top | average opponent: 1526record: 0-3 | new rating: 1470 | ||
| Grand Prix Utrecht 2015 (MM2 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1347 | Walden, Andrew [ENG] (1500) | Won 2-1 | +181518 |
| 2sealed | 1021 | Gartner, Michael (1518) | Won 2-1 | +181536 |
| 3sealed | 1039 | Frisk, Mikko (1444) | Lost 0-2 | -201516 |
| 4sealed | 1212 | Picot, Pierre (1567) | Won 2-1 | +191535 |
| 5sealed | 1097 | Tran, Thien-Anh (1533) | Won 2-1 | +181553 |
| 6sealed | 1063 | You, Junshuai (1673) | Won 2-0 | +201573 |
| 7sealed | 1060 | Kohn, Michel (1703) | Lost 1-2 | -151558 |
| 8sealed | 1082 | Hyeraci, Andrea (1562) | Lost 1-2 | -181540 |
| 9sealed | 1116 | Berchiolli, Marco (1576) | Lost 1-2 | -181522 |
| top | average opponent: 1564record: 5-4 | new rating: 1522 | ||