Johnson, Charles L
Current rating: 1470
| Grand Prix Washington DC 2013 (legacy) | starting rating: 1488 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 262 | Hardenberger, Bryan (1504) | Won 2-1 | +181506 |
| 3legacy | 148 | Zhi, Morley (1551) | Lost 1-2 | -171489 |
| 4legacy | 262 | Henry, John (1467) | Lost 1-2 | -191470 |
| top | average opponent: 1507record: 1-2 | new rating: 1470 | ||
| Grand Prix Atlantic City 2013 (RTR standard) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 419 | Johnson, Erik (1624) | Lost 1-2 | -151450 |
| 2standard | 502 | Rodamar, Jack (1452) | Lost 1-2 | -181432 |
| 3standard | 631 | Thomas, Morgan (1463) | Won 2-0 | +191451 |
| 4standard | 589 | Au Yeung, Jonathan (1482) | Won 2-0 | +181469 |
| 5standard | 448 | Carroll, Clayton (1439) | Won 2-0 | +181487 |
| 6standard | 479 | Matula, Garrett (1498) | Lost 0-2 | -181469 |
| 7standard | 447 | Enslen, Eric (1501) | Won 2-0 | +181487 |
| 8standard | 273 | Garraud, Monique (1396) | Lost 1-2 | -191468 |
| 9standard | 272 | Chan, Jason [USA] (1571) | Won 2-0 | +201488 |
| top | average opponent: 1492record: 5-4 | new rating: 1488 | ||
| Grand Prix Baltimore 2012 (DKA standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 197 | Happel, Adam (1500) | Lost 0-2 | -181482 |
| 2standard | 574 | Sobel, Joseph A (1486) | Lost 1-2 | -181464 |
| 3standard | 620 | Taveras, Edward (1464) | Won 2-1 | +181482 |
| 4standard | 705 | Balakrishnan, Vasu (1536) | Lost 1-2 | -171465 |
| top | average opponent: 1496record: 1-3 | new rating: 1465 | ||