Costa, Joel David
Current rating: 1465
Record: 3-5
| Grand Prix Krakow 2007 (LRW standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 508 | Klepanec, Timotej (1500) | Won 2-1 | +181518 |
| 2standard | 584 | Laski, Piotr (1518) | Won 2-1 | +181536 |
| 3standard | 514 | Lapaine, Valentin (1500) | Lost 0-2 | -191517 |
| 4standard | 615 | Thomsen, Sascha (1578) | Lost 0-2 | -171500 |
| 5standard | 647 | Bathe-Taylor, Mark R (1501) | Won 2-1 | +181518 |
| 6standard | 575 | Tomeczek, Krzysztof (1527) | Lost 0-2 | -171501 |
| 7standard | 630 | Andrulevicius, Mindaugas (1499) | Lost 0-2 | -181483 |
| 8standard | 616 | Niezgodzki, Tomasz (1483) | Lost 1-2 | -181465 |
| average opponent: 1513record: 3-5 | new rating: 1465 | |||