Koss, Chad
Current rating: 1513
Record: 16-15 (GP) / 2-5 (professional)
| Grand Prix Dallas-Fort Worth 2015 (ORI limited) | starting rating: 1512 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 241 | Fisher, Joseph (1539) | Lost 0-2 | -171495 |
| 2sealed | 594 | Kulesza, Hunter (1482) | Won 2-1 | +181513 |
| 3sealed | 343 | Travis, Phillip (1499) | Won 2-0 | +171530 |
| 4sealed | 379 | Smith, Christopher (1679) | Lost 1-2 | -151515 |
| 5sealed | 556 | Palid, Emily (1501) | Lost 0-2 | -181497 |
| 6sealed | 513 | Wingard, Michael (1476) | Won 2-0 | +171514 |
| 7sealed | 397 | Romick, Michael (1499) | Won 2-1 | +181532 |
| 8sealed | 278 | Liaw, Evan (1473) | Lost 0-2 | -191513 |
| top | average opponent: 1518record: 4-4 | new rating: 1513 | ||
| Grand Prix Austin 2004 (COK limited) | starting rating: 1472 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 125 | Howard, Eric (1500) | Won 2-1 | +191491 |
| 2sealed | 7 | Allen, John (1503) | Won 2-0 | +181509 |
| 3sealed | 17 | Cooper, Champion (1536) | Won 2-0 | +181527 |
| 4sealed | 39 | Pechon, Jonathan (1755) | Won 2-1 | +221549 |
| 5sealed | 21 | Tobey, Aaron (1537) | Won 2-0 | +181567 |
| 6sealed | 11 | Krumb, Michael (1694) | Won 2-1 | +201587 |
| 7sealed | 2 | Thompson, Gerry (1764) | Lost 1-2 | -141573 |
| 8sealed | 19 | Miller, Stephen (1623) | Lost 0-2 | -171556 |
| 9rochester | 22 | King, Michael (1494) | Won 2-1 | +161572 |
| 10rochester | 17 | Russell, Paul (1804) | Lost 0-2 | -131559 |
| 11rochester | 24 | Fabiano, Gerard (1921) | Lost 1-2 | -121547 |
| 12rochester | 9 | Young, Robert [USA] (1558) | Lost 1-2 | -181529 |
| 13rochester | 16 | Ferguson, Beau (1595) | Lost 0-2 | -171512 |
| top | average opponent: 1637record: 7-6 | new rating: 1512 | ||
| Pro Tour Yokohama 2003 (LGN draft) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1draft | 47 | Jeudon, Florent (1784) | Lost 0-2 | -131487 |
| 2draft | 92 | Kashima, Akihiro (1806) | Won 2-1 | +241511 |
| 3draft | 45 | Roux, Sebastien (1566) | Lost 1-2 | -171494 |
| 4draft | 33 | Kosmidis, Jon (1546) | Lost 1-2 | -171477 |
| 5draft | 17 | Mestre, Raul (1809) | Won 2-1 | +241501 |
| 6draft | 91 | Ziegner, Mark (1769) | Lost 1-2 | -141487 |
| 7draft | 79 | Starleaf, Derek (1639) | Lost 0-2 | -151472 |
| top | average opponent: 1702record: 2-5 | new rating: 1472 | ||
| Grand Prix Houston 2002 (extended) | starting rating: 1499 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 22 | Morrow, Henry (1466) | Won 2-1 | +181517 |
| 2extended | 13 | farnsworth, chris (1518) | Won 2-0 | +181535 |
| 3extended | 21 | Lakey, Chase (1535) | Lost 1-2 | -181517 |
| 4extended | 77 | Reimund, Shawn (1524) | Won 2-1 | +181535 |
| 5extended | 40 | Flood, Daniel (1625) | Lost 1-2 | -171518 |
| 6extended | 58 | Bates, Daniel (1501) | Lost 0-2 | -181500 |
| top | average opponent: 1528record: 3-3 | new rating: 1500 | ||
| Grand Prix Dallas 2000 (INV limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 19 | Rivera, Daniel (1500) | Won 2-0 | +181518 |
| 2sealed | 59 | Potter, Jason (1509) | Won 2-0 | +181536 |
| 3sealed | 37 | Glaze, Jeff (1518) | Lost 1-2 | -181518 |
| 4sealed | 58 | Austin, Ty (1499) | Lost 0-2 | -191499 |
| top | average opponent: 1507record: 2-2 | new rating: 1499 | ||