Grzelkowski, Stephan
Current rating: 1473
| Grand Prix Kyoto 2019 (RNA standard) | starting rating: 1529 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 160 | Ehara, Makoto (1461) | Lost 1-2 | -191510 |
| 2standard | 579 | Kunimoto, Jumpei (1484) | Lost 0-2 | -181492 |
| 3standard | 945 | Jiang, Changchen (1462) | Lost 0-2 | -191473 |
| top | average opponent: 1469record: 0-3 | new rating: 1473 | ||
| Grand Prix Pittsburgh 2018 (DOM standard) | starting rating: 1480 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 249 | Thomas, Braham (1534) | Lost 1-2 | -171463 |
| 2standard | 290 | Lloyd, Kevin (1443) | Won 2-0 | +181481 |
| 3standard | 293 | Bradley, Matthew (1509) | Lost 0-2 | -181463 |
| 4standard | 328 | Smith, Scott (1302) | Won 2-1 | +151478 |
| 5standard | 344 | Carpenter, Tim (1458) | Won 2-0 | +181496 |
| 6standard | 281 | Barber, Ian (1845) | Won 2-1 | +241520 |
| 7standard | 188 | Burkhart, Corey (2055) | Lost 0-2 | -91511 |
| 8standard | 177 | McDonald, James [USA] (1521) | Won 2-0 | +181529 |
| top | average opponent: 1583record: 5-3 | new rating: 1529 | ||
| Grand Prix Hartford 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 567 | Musselman, Reuben (1547) | Lost 1-2 | -171483 |
| 2modern | 432 | Schlott, James (1472) | Lost 0-2 | -181465 |
| 3modern | 843 | Puckett, Katie (1559) | Draw 1-1 | +11466 |
| 4modern | 817 | Koziol, Joshua (1413) | Won 2-0 | +171483 |
| 5modern | 690 | Gaugler, Gregory (1358) | Won 1-0 | +161499 |
| 6modern | 540 | Smithson, Isaiah (1496) | Lost 0-2 | -181481 |
| 7modern | 523 | Markson, Samuel (1437) | Draw 1-1 | -11480 |
| top | average opponent: 1469record: 2-3-2 | new rating: 1480 | ||