Gerth, Jonathan
Current rating: 1561
Record: 8-5
| Grand Prix Richmond 2006 (GPT limited) | starting rating: 1560 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 120 | Johnson, Blair (1518) | Lost 1-2 | -191541 |
| 2sealed | 164 | Twentier, Edwin (1482) | Won 2-0 | +171558 |
| 3sealed | 162 | Leveille, Tom (1500) | Won 2-0 | +171575 |
| 4sealed | 124 | Douglass, Morgan (1777) | Lost 1-2 | -141561 |
| average opponent: 1569record: 2-2 | new rating: 1561 | |||
| Grand Prix Columbus 2004 (DST limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 200 | Miguel, Andres (1500) | Won 2-0 | +181518 |
| 2sealed | 127 | Knutson, Ted (1518) | Lost 0-2 | -181500 |
| 3sealed | 201 | Pearl, David (1500) | Won 2-0 | +181518 |
| 4sealed | 230 | Yurchick, Adam (1574) | Won 2-1 | +191537 |
| 5sealed | 106 | Whitehead, Adam (1569) | Won 2-1 | +191556 |
| 6sealed | 61 | Brockway, Brian (1557) | Lost 0-2 | -181538 |
| 7sealed | 83 | Thompson, Keith (1699) | Won 2-0 | +211559 |
| 8sealed | 73 | Vizzacco, Mark (1616) | Won 2-1 | +191578 |
| 9sealed | 72 | gaglio, vincent (1609) | Lost 0-2 | -181560 |
| average opponent: 1571record: 6-3 | new rating: 1560 | |||