Jack, Nathaniel
Current rating: 1408
Record: 11-18-2
| Grand Prix Pittsburgh 2015 (modern) | starting rating: 1392 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 517 | Gedekoh, Shane (1500) | Won 2-0 | +201412 |
| 2modern | 86 | Ducharme, Kyle (1523) | Won 2-0 | +201432 |
| 3modern | 336 | Bilotto, Robert (1549) | Won 2-0 | +201452 |
| 4modern | 43 | Cali, Rich (1576) | Lost 1-2 | -151437 |
| 5modern | 491 | Clawson, Brent (1845) | Lost 1-2 | -111426 |
| 6modern | 497 | Crandall, Justin (1477) | Lost 1-2 | -181408 |
| top | average opponent: 1578record: 3-3 | new rating: 1408 | ||
| Grand Prix Richmond 2014 (modern) | starting rating: 1403 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 337 | Conrad, Alexander (1500) | Won 2-1 | +201423 |
| 2modern | 464 | Mitchell, Robbie (1517) | Lost 0-2 | -161407 |
| 3modern | 370 | Haithcock, Jesse (1502) | Draw 1-1 | +21409 |
| 4modern | 459 | Moore-Jansen, Rorik (1498) | Lost 0-2 | -171392 |
| top | average opponent: 1504record: 1-2-1 | new rating: 1392 | ||
| Grand Prix Yokohama 2010 (extended) | starting rating: 1472 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 395 | Kawai, Hiroki (1505) | Lost 0-2 | -171455 |
| 2extended | 448 | Kosemura, Tomohiro (1482) | Won 2-0 | +181473 |
| 3extended | 332 | Sasaoka, Hirohito (1434) | Lost 0-2 | -181455 |
| 4extended | 337 | Taniguchi, Yuusuke (1496) | Lost 1-2 | -181437 |
| 5extended | 416 | Neo, Alvin (1526) | Lost 0-2 | -161421 |
| 6extended | 359 | Kabe, Kazuki (1445) | Lost 0-2 | -181403 |
| top | average opponent: 1481record: 1-5 | new rating: 1403 | ||
| Grand Prix Boston 2009 (M10 limited) | starting rating: 1470 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 136 | McGrath, Colin (1500) | Won 2-0 | +181488 |
| 2sealed | 150 | Harris, Ezra (1519) | Lost 1-2 | -171471 |
| 3sealed | 162 | Forbes, Jason (1500) | Won 2-0 | +181489 |
| 4sealed | 201 | Da Rocha, Christopher (1536) | Won 2-0 | +191508 |
| 5sealed | 67 | Pease, Nate (1486) | Lost 0-2 | -181490 |
| 6sealed | 202 | Van Den Bleeken, Diete (1515) | Lost 0-2 | -181472 |
| top | average opponent: 1509record: 3-3 | new rating: 1472 | ||
| Grand Prix Charlotte 2005 (extended) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 43 | Arevalo, Tony (1554) | Lost 0-2 | -161449 |
| 2extended | 169 | Moss, Westley (1482) | Draw 1-1 | 01449 |
| 3extended | 157 | Simpson, Justin (1557) | Won 2-0 | +201469 |
| 4extended | 150 | Capalbo, Matthew (1480) | Won 2-0 | +191488 |
| 5extended | 105 | MacDonald, Dan (1490) | Lost 1-2 | -181470 |
| top | average opponent: 1512record: 2-2-1 | new rating: 1470 | ||
| Grand Prix Boston 2005 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 49 | Croes, Ben (1500) | Won 2-0 | +181518 |
| 2extended | 177 | Thoms, Christopher (1574) | Lost 1-2 | -171501 |
| 3extended | 166 | Cicio, Joshua (1486) | Lost 0-2 | -181483 |
| 4extended | 252 | Mathews, Paul (1507) | Lost 1-2 | -181465 |
| top | average opponent: 1517record: 1-3 | new rating: 1465 | ||