Williamson, Cliff
Current rating: 1565
| Grand Prix Washington DC 2019 (MH1 limited) | starting rating: 1546 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 336 | Petrick, Edric (1448) | Won 2-0 | +171563 |
| 2sealed | 98 | Pettie, Jacob (1516) | Won 0-0 | +171580 |
| 3sealed | 162 | Wang, Haotian (1940) | Lost 0-2 | -121568 |
| 4sealed | 263 | Lucy, J. Sawyer (1912) | Lost 0-2 | -121556 |
| 5sealed | 261 | Thiele, Kyle (1735) | Won 2-1 | +211577 |
| 6sealed | 197 | Anaraki, BG (1521) | Won 2-0 | +171594 |
| 7sealed | 119 | Allen, Garrett (1694) | Lost 1-2 | -161578 |
| 8sealed | 202 | Lizzi, Adam (1828) | Lost 1-2 | -131565 |
| top | average opponent: 1699record: 4-4 | new rating: 1565 | ||
| Grand Prix Milwaukee 2018 (GRN standard) | starting rating: 1602 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 258 | Stern, Dustin (1954) | Lost 0-2 | -111591 |
| 2standard | 372 | Benjamin, Kane (1483) | Won 2-0 | +161607 |
| 3standard | 485 | Barlament, Zachary (1506) | Lost 0-2 | -201587 |
| 4standard | 452 | Reschke, Joel (1464) | Lost 1-2 | -201567 |
| 5standard | 505 | Cox, Brendan (1448) | Lost 0-2 | -211546 |
| top | average opponent: 1571record: 1-4 | new rating: 1546 | ||
| Grand Prix Washington DC 2017 (HOU standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 21 | VanEvery, Paul (1439) | Won 2-1 | +171517 |
| 2standard | 48 | Solano, Gustavo (1396) | Lost 0-2 | -201497 |
| 3standard | 378 | McHugh, Justin (1476) | Won 2-1 | +171514 |
| 4standard | 262 | Markson, Samuel (1504) | Lost 1-2 | -181496 |
| 5standard | 461 | Karmiche, Dominick (1423) | Lost 0-2 | -191477 |
| 6standard | 631 | Robert, Kyle (1463) | Won 2-0 | +181495 |
| 7standard | 518 | Rapien, Taylor (1712) | Won 2-0 | +211516 |
| 8standard | 317 | Page, Veronica (1731) | Won 2-0 | +221538 |
| 9standard | 176 | Rodgers, Christopher (1541) | Won 2-0 | +181556 |
| 10standard | 154 | Sledgeski, Gunner (1573) | Won 2-0 | +191575 |
| 11standard | 144 | Liberati, Bernard (1605) | Won 2-1 | +181593 |
| 12standard | 65 | Andress, Galen (1613) | Won 2-0 | +191612 |
| 13standard | 74 | Huang, Hantao (1711) | Draw 1-1 | +11613 |
| 14standard | 52 | Job, Jonathan (2033) | Lost 0-2 | -101603 |
| 15standard | 85 | Bentley, Brent (1593) | Draw 1-1 | -11602 |
| top | average opponent: 1588record: 9-4-2 | new rating: 1602 | ||