Marr, Tom P
Current rating: 1471
Record: 4-6
| Grand Prix Kansas City 2011 (NPH limited) | starting rating: 1480 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 49 | Marlow, Michael (1456) | Won 2-1 | +181498 |
| 2sealed | 125 | Awde, Matthew (1519) | Won 2-1 | +181516 |
| 3sealed | 48 | Gleicher, David (1775) | Lost 0-2 | -131503 |
| 4sealed | 190 | Fritz, Austin (1508) | Lost 1-2 | -181485 |
| 5sealed | 244 | Romao, Carlos (1681) | Lost 1-2 | -141471 |
| average opponent: 1588record: 2-3 | new rating: 1471 | |||
| Grand Prix Washington DC 2010 (ROE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 886 | Bravstein, Jeffrey (1593) | Won 2-0 | +201520 |
| 2standard | 634 | Poole, Jon (1500) | Lost 0-2 | -191501 |
| 3standard | 875 | Miller, Jake C (1511) | Lost 0-2 | -171484 |
| 4standard | 1022 | Flinn, Bradley E (1413) | Won 2-1 | +161500 |
| 5standard | 891 | Merrill, Kenny (1403) | Lost 0-2 | -201480 |
| average opponent: 1484record: 2-3 | new rating: 1480 | |||