Chatham, Zach
Current rating: 1376
Record: 8-16-2
| Grand Prix Dallas-Fort Worth 2019 (modern) | starting rating: 1420 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 170 | Amaro, Luis (1590) | Lost 0-2 | -151405 |
| 3modern | 499 | Barr, Richard (1499) | Lost 1-2 | -161389 |
| 4modern | 528 | Toledo, Bruno (1499) | Won 2-1 | +201409 |
| 5modern | 383 | Wilson, Tristan (1456) | Lost 0-2 | -171392 |
| 6modern | 385 | Willig, Simon (1527) | Lost 0-2 | -161376 |
| top | average opponent: 1514record: 1-4 | new rating: 1376 | ||
| Grand Prix Los Angeles 2019 (modern) | starting rating: 1417 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 199 | Martinez, Omar (1424) | Won 2-1 | +181435 |
| 2modern | 44 | Wong, Alex (1527) | Lost 0-2 | -161419 |
| 3modern | 439 | Vu, Phillip (1477) | Lost 0-2 | -171402 |
| 4modern | 680 | Flores, Armando (1413) | Won 2-0 | +181420 |
| 5modern | 409 | Coen, Eric (1407) | Won 2-0 | +181438 |
| 6modern | 285 | Chapman, Peter (1479) | Lost 1-2 | -181420 |
| top | average opponent: 1454record: 3-3 | new rating: 1420 | ||
| Grand Prix Los Angeles 2018 (M19 standard) | starting rating: 1449 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 161 | Fogt, Garrison (1502) | Lost 0-2 | -171432 |
| 2standard | 291 | Morschauser, William (1482) | Draw 1-1 | +11433 |
| 3standard | 449 | Rockey, Garrett (1464) | Won 1-0 | +191452 |
| 4standard | 352 | Hundemer, Greg (1500) | Lost 0-2 | -181434 |
| 5standard | 416 | Vittorio, Frank (1449) | Lost 0-2 | -171417 |
| top | average opponent: 1479record: 1-3-1 | new rating: 1417 | ||
| Grand Prix Las Vegas 2018 (modern) (modern) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 564 | Wilder, James (1500) | Draw 1-1 | +11464 |
| 2modern | 596 | Russell, Kyle (1634) | Lost 0-2 | -151449 |
| top | average opponent: 1567record: 0-1-1 | new rating: 1449 | ||
| Grand Prix Phoenix 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 110 | Locke, Nathan (1500) | Lost 1-2 | -181482 |
| 2modern | 342 | Belle Isle, Jason (1503) | Won 2-0 | +181500 |
| 3modern | 544 | Callahan, Corey (1503) | Won 2-1 | +181518 |
| 4modern | 384 | Beck, Justin (1641) | Won 2-1 | +211539 |
| 5modern | 136 | He, Yang (1614) | Lost 0-2 | -171522 |
| 6modern | 207 | Kauffman, Tommy (1515) | Lost 1-2 | -181504 |
| 7modern | 326 | Bryant, Matthew (1374) | Lost 0-2 | -201484 |
| 8modern | 313 | Lopez, Erik (1365) | Lost 1-2 | -211463 |
| top | average opponent: 1502record: 3-5 | new rating: 1463 | ||