Chelberg, Jeffrey
Current rating: 1551
| Grand Prix Minneapolis 2005 (Kamigawa block) | starting rating: 1556 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 109 | Stojak, Peter (1500) | Lost 1-2 | -191537 |
| 2block | 110 | Smith, Adam (1512) | Won 2-1 | +171554 |
| 3block | 110 | Clark, Christopher (1440) | Won 2-1 | +161570 |
| 4block | 104 | Albers, Daniel (1520) | Lost 1-2 | -191551 |
| top | average opponent: 1493record: 2-2 | new rating: 1551 | ||
| Grand Prix Milwaukee 2002 (TOR standard) | starting rating: 1556 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 113 | Chambers, Jason (1500) | Won 2-0 | +171573 |
| 2standard | 76 | Slack, Mark (1519) | Won 2-1 | +171590 |
| 3standard | 20 | Belant, Andrew (1616) | Won 2-1 | +181608 |
| 4standard | 88 | Jensen, William (1874) | Lost 0-2 | -131595 |
| 5standard | 68 | Mcfadden, Jason (1536) | Lost 1-2 | -191576 |
| 6standard | 122 | Torgerson, Ben (1552) | Won 2-0 | +181594 |
| 7standard | 104 | Van Heesch, Peter (1536) | Lost 1-2 | -191575 |
| 8standard | 113 | Wilhoyt, Ricky (1518) | Lost 1-2 | -191556 |
| top | average opponent: 1581record: 4-4 | new rating: 1556 | ||
| Grand Prix Minneapolis 2001 (Invasion block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 106 | Gordon, Robert (1500) | Won 2-1 | +181518 |
| 2block | 59 | Garber, Jacob (1518) | Lost 0-2 | -181500 |
| 3block | 63 | Shaffer, Katherine (1500) | Won 2-1 | +181518 |
| 4block | 56 | Flores, Tim (1520) | Won 2-0 | +181536 |
| 5block | 29 | Stark, William (1535) | Won 2-0 | +181554 |
| 6block | 21 | Szigeti, Peter (1663) | Lost 0-2 | -161538 |
| 7block | 61 | Duchow, Adam (1534) | Won 2-1 | +181556 |
| top | average opponent: 1539record: 5-2 | new rating: 1556 | ||