Johnson, Marion
Current rating: 1500
| Grand Prix Washington DC 2017 (HOU standard) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 74 | South, James (1428) | Won 2-0 | +171481 |
| 2standard | 252 | Wright, Justice (1518) | Won 2-1 | +191500 |
| 3standard | 161 | Leffler, Devan (1536) | Lost 0-2 | -181482 |
| 4standard | 479 | Aigner, Michael (1525) | Won 2-1 | +191501 |
| 5standard | 239 | Elsik, Zac (1815) | Lost 0-2 | -121489 |
| 6standard | 243 | Kassis, Eli (2134) | Lost 1-2 | -81481 |
| 7standard | 436 | Van Scyoc, Lenny (1484) | Won 2-0 | +181499 |
| 8standard | 340 | Villao, Ruben (1512) | Won 2-1 | +181517 |
| 9standard | 232 | Chiang, Will (1551) | Lost 0-2 | -171500 |
| top | average opponent: 1611record: 5-4 | new rating: 1500 | ||
| Grand Prix Richmond 2017 (AKH limited) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 68 | Dunlap, William (1500) | Won 2-0 | +181483 |
| 2sealed | 173 | Doshi, Vivek (1643) | Lost 0-2 | -151468 |
| 3sealed | 523 | Bower, Mac (1653) | Won 2-0 | +221490 |
| 4sealed | 486 | Louie, Justin (1476) | Won 2-1 | +171507 |
| 5sealed | 322 | Esposito, John (1734) | Lost 0-2 | -141493 |
| 6sealed | 484 | Neal, Robert (1551) | Lost 1-2 | -171476 |
| 7sealed | 526 | Kolodzey, William (1774) | Lost 1-2 | -121464 |
| top | average opponent: 1619record: 3-4 | new rating: 1464 | ||
| Grand Prix Boston 2003 (LGN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 91 | Beverley, Robert (1518) | Lost 0-2 | -181482 |
| 2sealed | 217 | Kergaravat, Anthony (1482) | Lost 1-2 | -181464 |
| 3sealed | 227 | Orcutt, Daniel (1464) | Draw 1-1 | 01464 |
| 4sealed | 241 | Lourie, Collin (1482) | Won 2-0 | +191483 |
| 5sealed | 198 | Mazur, Anthony (1483) | Lost 1-2 | -181465 |
| top | average opponent: 1486record: 1-3-1 | new rating: 1465 | ||