Zahnzinger, Zachary
Current rating: 1529
| Grand Prix Providence 2016 (KLD standard) | starting rating: 1527 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 194 | Moran, Rourke (1500) | Lost 0-2 | -191508 |
| 2standard | 313 | Merfert, John (1431) | Lost 1-2 | -191489 |
| 3standard | 557 | O'Brien, Tyler (1466) | Lost 0-2 | -191470 |
| 4standard | 534 | Stone, Ted (1431) | Won 2-0 | +181488 |
| 5standard | 487 | Harris, Alexander (1662) | Won 2-0 | +211509 |
| 6standard | 415 | Delven, Randy (1465) | Won 2-0 | +171526 |
| 7standard | 326 | Corbin, Julia (1490) | Won 2-1 | +171543 |
| 8standard | 285 | Reed, David (1768) | Lost 0-2 | -141529 |
| top | average opponent: 1527record: 4-4 | new rating: 1529 | ||
| Grand Prix Charlotte 2015 (modern) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 417 | Creech, Lawrence (1642) | Lost 0-2 | -151448 |
| 2modern | 564 | Harrison, Kevin (1470) | Won 2-1 | +181466 |
| 3modern | 423 | Harper, Cody (1500) | Won 2-0 | +191485 |
| 4modern | 414 | Latham, Jason R (1518) | Lost 0-2 | -171468 |
| 5modern | 415 | O'Neal, Seavy (1469) | Won 2-1 | +181486 |
| 6modern | 358 | Reeves, Brian (1674) | Won 2-0 | +211507 |
| 7modern | 369 | Cochran, Hunter (1577) | Won 2-0 | +191526 |
| 8modern | 269 | Wight, Lawrence (1571) | Won 2-0 | +191545 |
| 9modern | 286 | Parker, James R (1526) | Lost 0-2 | -181527 |
| top | average opponent: 1550record: 6-3 | new rating: 1527 | ||
| Grand Prix Boston-Worcester 2014 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 889 | Moss, Justin (1447) | Won 2-1 | +171517 |
| 2modern | 735 | Benincasa, Devin (1518) | Lost 1-2 | -181499 |
| 3modern | 1089 | Palovich, Chris (1479) | Lost 0-2 | -181481 |
| 4modern | 1128 | Brooks, Donald (1479) | Lost 0-2 | -181463 |
| top | average opponent: 1481record: 1-3 | new rating: 1463 | ||