Hersman, Samuel
Current rating: 1366
Record: 3-11-1
| Grand Prix Seattle 2018 (standard) (RIX standard) | starting rating: 1369 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 134 | Halter, Deborah (1500) | Lost 0-2 | -151354 |
| 2standard | 403 | Larkins, John (1465) | Won 2-1 | +201374 |
| 3standard | 491 | Pisarski, Matt (1579) | Lost 1-2 | -151359 |
| 4standard | 531 | Grcic, Denin (1483) | Lost 0-2 | -151344 |
| 5standard | 591 | Ewing, Jason (1461) | Won 2-0 | +201364 |
| 6standard | 439 | Hiramoto, Brent (1482) | Draw 1-1 | +21366 |
| average opponent: 1495record: 2-3-1 | new rating: 1366 | |||
| Grand Prix Denver 2017 (HOU standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 160 | Chmielewski, Ryan (1500) | Lost 1-2 | -181482 |
| 2standard | 288 | Puffer, Jon (1447) | Lost 0-2 | -191463 |
| 3standard | 544 | Williams, Trey (1466) | Lost 1-2 | -181445 |
| 4standard | 542 | Ricks, Marc (1448) | Lost 1-2 | -181427 |
| 5standard | 531 | Kirkpatrick, Greg (1356) | Lost 0-2 | -191408 |
| 6standard | 501 | Beck, Joanne (1280) | Won 2-0 | +161424 |
| 7standard | 441 | Kuhn, Brannon (1361) | Lost 0-2 | -191405 |
| 8standard | 386 | Glass, Campbell (1448) | Lost 0-2 | -181387 |
| 9standard | 325 | Grumet, John (1377) | Lost 0-2 | -181369 |
| average opponent: 1409record: 1-8 | new rating: 1369 | |||