Parkin, Zachary
Current rating: 1427
Record: 9-14
| Grand Prix Dallas-Fort Worth 2016 (modern) | starting rating: 1458 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 362 | Hamrick, Wesley (1500) | Lost 1-2 | -171441 |
| 2modern | 617 | Dunn, Joshua (1415) | Won 2-1 | +171458 |
| 3modern | 630 | Leech, Shea (1804) | Won 2-1 | +241482 |
| 4modern | 320 | Vickers, Brandon (1532) | Lost 0-2 | -171465 |
| 5modern | 470 | Saenz, Matthew (1363) | Lost 0-2 | -201445 |
| 6modern | 754 | King, Chandler (1445) | Lost 0-2 | -181427 |
| top | average opponent: 1510record: 2-4 | new rating: 1427 | ||
| Grand Prix Detroit 2016 (modern) | starting rating: 1429 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 502 | HAGEN, BRETT (1500) | Won 2-1 | +191448 |
| 2modern | 318 | Mendoza, Matt (1738) | Lost 1-2 | -131435 |
| 3modern | 703 | Schultz, Kriz (1387) | Won 2-0 | +171452 |
| 4modern | 625 | Breiler, Patrick (1517) | Won 2-0 | +201472 |
| 5modern | 429 | Bender, Douglas (1537) | Lost 0-2 | -171455 |
| 6modern | 563 | Setree, Cody (1418) | Won 2-1 | +171472 |
| 7modern | 214 | Francis, Anthony (1534) | Lost 1-2 | -171455 |
| 8modern | 505 | Underwood, Travis (1503) | Won 2-0 | +191474 |
| 9modern | 319 | Daloisio, Domenic (1564) | Lost 0-2 | -161458 |
| top | average opponent: 1522record: 5-4 | new rating: 1458 | ||
| Grand Prix Chicago 2014 (JOU standard) | starting rating: 1480 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 140 | Herring, Garrett (1536) | Lost 1-2 | -171463 |
| 4standard | 120 | Apraez, Nicolette (1500) | Lost 1-2 | -171446 |
| 5standard | 275 | D'Addario, Daniel (1502) | Lost 0-0 | -171429 |
| top | average opponent: 1513record: 0-3 | new rating: 1429 | ||
| Grand Prix Columbus 2012 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 108 | Sparkman, Jonathan (1500) | Lost 0-2 | -181482 |
| 2modern | 355 | Pillon, Chris (1429) | Won 2-0 | +171499 |
| 3modern | 287 | Pennachio, Joe (1451) | Lost 0-2 | -191480 |
| 4modern | 443 | Scherf, Anthony (1479) | Lost 1-2 | -181462 |
| 5modern | 454 | LAGANA, SAM (1463) | Won 2-0 | +181480 |
| top | average opponent: 1464record: 2-3 | new rating: 1480 | ||