Wittrock, Warren
Current rating: 1470
| Grand Prix Seattle-Tacoma 2015 (legacy) | starting rating: 1490 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 340 | Ilcewicz, Hayden (1500) | Won 2-0 | +181508 |
| 2legacy | 186 | Taylor, Tristan (1482) | Lost 1-2 | -181490 |
| 3legacy | 538 | Mlinac, Chris (1396) | Lost 0-2 | -201470 |
| top | average opponent: 1459record: 1-2 | new rating: 1470 | ||
| Grand Prix Seattle-Tacoma 2012 (DKA limited) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 59 | Yang, Tonny (1500) | Won 2-0 | +191466 |
| 3sealed | 32 | Adams, Brogan (1536) | Lost 0-2 | -161450 |
| 4sealed | 219 | Willette, Lloyd (1489) | Won 2-1 | +181468 |
| 5sealed | 117 | Carson, Erik (1502) | Won 2-0 | +191487 |
| 6sealed | 83 | Kwong, Kevin (1535) | Lost 1-2 | -171470 |
| 7sealed | 148 | Weizenbaum, Nathan (1521) | Won 2-1 | +191489 |
| 8sealed | 111 | Menton, Stephen (1522) | Won 2-1 | +181507 |
| 9sealed | 54 | Dhanani, Ahmad (1539) | Lost 0-2 | -171490 |
| top | average opponent: 1518record: 5-3 | new rating: 1490 | ||
| Grand Prix Seattle 2009 (ARB standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 12 | Cabanero, Erik (1455) | Lost 0-2 | -191481 |
| 3standard | 230 | Flanagan, Daniel P (1584) | Lost 1-2 | -161465 |
| 4standard | 485 | Lorrekovich, Joshua (1483) | Lost 0-2 | -181447 |
| top | average opponent: 1507record: 0-3 | new rating: 1447 | ||