Pierce, Charles
Current rating: 1449
Record: 8-13-1
| Grand Prix Las Vegas 2017 (modern) (modern) | starting rating: 1400 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 2144 | Sohi, JP (1582) | Won 2-0 | +211421 |
| 4modern | 2124 | Chow, Harold (1541) | Lost 0-2 | -161405 |
| 5modern | 2118 | Hanson, Brandon (1513) | Won 2-0 | +201425 |
| 6modern | 2125 | Corbett, Bryan (1592) | Lost 1-2 | -151410 |
| 7modern | 2134 | Soma, Nishant (1574) | Lost 0-2 | -151395 |
| 8modern | 2133 | Kwan, Philip (1442) | Won 2-0 | +191414 |
| 9modern | 2122 | Wong, Erik (1526) | Won 2-0 | +201434 |
| 10modern | 248 | Eakin, Michael (1576) | Won 2-0 | +201454 |
| 11modern | 253 | Lusted, Mark (1557) | Won 2-0 | +201474 |
| 12modern | 105 | Harris, Alexander (1715) | Won 2-1 | +231497 |
| 13modern | 154 | Abel, Gary (1602) | Lost 0-2 | -161481 |
| 14modern | 127 | Monroe, Isaiah (1584) | Lost 1-2 | -171464 |
| 15modern | 201 | Warby, Dougal (1597) | Lost 0-2 | -151449 |
| top | average opponent: 1569record: 7-6 | new rating: 1449 | ||
| Grand Prix Portland 2016 (EMN standard) | starting rating: 1449 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 15 | Ahlbach, Connor (1534) | Draw 1-1 | +21451 |
| 4standard | 181 | Swiney, Bruce (1585) | Lost 1-2 | -161435 |
| 5standard | 367 | Oguma, Rory (1400) | Lost 0-2 | -191416 |
| 6standard | 475 | Radcliffe, John (1485) | Lost 0-2 | -161400 |
| top | average opponent: 1501record: 0-3-1 | new rating: 1400 | ||
| Grand Prix Los Angeles 2016 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 720 | Lee, Daniel (1472) | Lost 1-2 | -181482 |
| 2modern | 819 | Bosarreyes, Jason (1502) | Lost 0-2 | -181464 |
| 3modern | 1001 | Sandoval, Wagner (1464) | Lost 0-2 | -181446 |
| 4modern | 1069 | Ramirios, Johnny (1371) | Won 2-0 | +171463 |
| 5modern | 982 | Akers, Chris (1713) | Lost 1-2 | -141449 |
| top | average opponent: 1504record: 1-4 | new rating: 1449 | ||