Welch, David
Current rating: 1506
| Grand Prix London 2002 (Odyssey block) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 41 | Kammel, Rudolf (1482) | Won 2-0 | +181501 |
| 2block | 90 | Rodrigues, Ricardo (1571) | Lost 0-2 | -171484 |
| 3block | 236 | Nunn, Richard (1466) | Won 2-0 | +181502 |
| 4block | 180 | Mehdinejad, Bijan (1540) | Won 2-1 | +181520 |
| 5block | 65 | Minieri, Dario (1798) | Lost 0-2 | -131507 |
| 6block | 135 | Amon, Roger (1445) | Draw 1-1 | -11506 |
| top | average opponent: 1550record: 3-2-1 | new rating: 1506 | ||
| Grand Prix London 2001 (Invasion block) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 32 | Dreyling, Axel (1500) | Lost 0-2 | -181483 |
| top | record: 0-1 | new rating: 1483 | ||
| Grand Prix Copenhagen 2000 (PCY limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 10 | Jorgensen, Dan (1500) | Lost 0-1 | -181482 |
| 2sealed | 147 | Schwankl, Andre (1482) | Won 2-0 | +181500 |
| 3sealed | 109 | Raasted, Mads (1500) | Lost 0-2 | -181482 |
| 4sealed | 143 | Warnke, Ingo (1480) | Won 2-0 | +181500 |
| 5sealed | 105 | Balsby, Jeppe (1500) | Won 2-1 | +181518 |
| 6sealed | 66 | Bouchaib, Messaoud (1560) | Lost 0-2 | -171501 |
| top | average opponent: 1504record: 3-3 | new rating: 1501 | ||