Koon, Robert
Current rating: 1591
Record: 11-6-1
| Grand Prix Atlanta 2016 (KLD limited) | starting rating: 1536 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 915 | Zhuo, David (1607) | Won 2-0 | +201556 |
| 2sealed | 818 | Williams, Justin (1514) | Won 2-0 | +171573 |
| 3sealed | 547 | Cruickshank, Sean (1578) | Lost 1-2 | -181555 |
| 4sealed | 858 | Blasingame, Austin (1517) | Won 2-0 | +171572 |
| 5sealed | 702 | Struebing, Christian (1539) | Lost 0-2 | -181554 |
| 6sealed | 989 | Yim, Chi Hoi (1657) | Won 2-0 | +201574 |
| 7sealed | 831 | Leu, Kevin (1490) | Won 2-0 | +161590 |
| 8sealed | 744 | Pernankil, Avenash (1609) | Won 2-1 | +181608 |
| 9sealed | 586 | Anna, Christopher (1618) | Lost 0-2 | -171591 |
| average opponent: 1570record: 6-3 | new rating: 1591 | |||
| Grand Prix Charlotte 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 469 | Flint, Alec C (1609) | Won 2-1 | +201520 |
| 2sealed | 278 | Warren, Paul (1518) | Draw 1-1 | 01520 |
| 3sealed | 203 | Potts, Charles (1489) | Won 2-1 | +171537 |
| 4sealed | 158 | Cinderella, Molly (1534) | Won 2-0 | +181555 |
| 5sealed | 77 | Dowless, Joseph (1554) | Lost 1-2 | -181537 |
| 6sealed | 172 | Mason, Matthew (1535) | Won 2-1 | +181555 |
| 7sealed | 105 | McNamara, Brendan (1556) | Won 2-0 | +181573 |
| 8sealed | 63 | Cammack, Franklin (1516) | Lost 1-2 | -191554 |
| 9sealed | 118 | Husted, Joshua (1558) | Lost 1-2 | -181536 |
| average opponent: 1541record: 5-3-1 | new rating: 1536 | |||