Shaffstall, John
Current rating: 1459
Record: 4-7
| Grand Prix Seattle 2019 (MH1 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| A1sealed | 413 | Von Difloe, Tanner (1726) | Lost 0-2 | -141486 |
| A2sealed | 642 | Staples-Weyrauch, Kris (1511) | Won 2-0 | +181504 |
| A3sealed | 314 | Demery, Joshua (1632) | Won 2-1 | +211525 |
| A4sealed | 300 | Mercier, Mathew (1601) | Won 2-1 | +191544 |
| A5sealed | 174 | Rossman, Daniel (1530) | Lost 0-2 | -181526 |
| A6sealed | 248 | Ueda, Jay (1553) | Lost 0-2 | -181508 |
| A7sealed | 217 | Sweet, Parker (1511) | Lost 0-2 | -181490 |
| B1sealed | 595 | Jen, Arthur (1813) | Lost 0-2 | -121478 |
| B2sealed | 721 | Anderson, Bill (1448) | Lost 1-2 | -181460 |
| B3sealed | 532 | Hutchek, Terri (1413) | Won 2-0 | +171477 |
| B4sealed | 438 | Campbell, Cole (1490) | Lost 0-2 | -181459 |
| average opponent: 1566record: 4-7 | new rating: 1459 | |||