Chilk, Jonah
Current rating: 1569
Record: 9-5-1
| Grand Prix Los Angeles 2009 (extended) | starting rating: 1552 | |||
| round | table | opponent (rating) | result | Δrating |
| 3extended | 104 | Meyer, Douglas M (1537) | Lost 1-2 | -181534 |
| 4extended | 162 | Ong, Wei Jian (1508) | Lost 0-2 | -191515 |
| 5extended | 209 | Beck, Josh (1462) | Won 2-0 | +171532 |
| 6extended | 174 | Williams, Spencer (1500) | Won 2-0 | +181550 |
| 7extended | 173 | Dorsey, Jon (1522) | Won 2-0 | +171567 |
| 8extended | 66 | Izsak, Yoel (1733) | Won 2-0 | +211588 |
| 9extended | 57 | Unger, Max (1530) | Lost 0-2 | -191569 |
| average opponent: 1542record: 4-3 | new rating: 1569 | |||
| Grand Prix Los Angeles 2002 (ONS rochester) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 81 | Brenner, Daniel (1500) | Won 2-0 | +181518 |
| 2sealed | 42 | Lysik, Bruce (1499) | Draw 1-1 | 01518 |
| 3sealed | 74 | Lalague, Pierre (1518) | Won 2-0 | +181536 |
| 4sealed | 71 | Hetherington, Robert (1523) | Lost 1-2 | -191517 |
| 5sealed | 107 | Tarr, Alan (1470) | Won 2-1 | +181535 |
| 6sealed | 66 | Freeman, Ross (1555) | Won 2-1 | +181553 |
| 7sealed | 45 | Raines, Joseph (1557) | Won 2-0 | +181571 |
| 8sealed | 30 | Herzberg, Scott (1505) | Lost 1-2 | -191552 |
| average opponent: 1516record: 5-2-1 | new rating: 1552 | |||