Piotrowski, Michael
Current rating: 1429
Record: 1-5-1
| Grand Prix San Diego 1999 (MMQ limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 47 | Justman, Jordan (1500) | Lost 0-0 | -181482 |
| 2sealed | 125 | Brooks, Richard (1482) | Won 0-0 | +181500 |
| 3sealed | 58 | Angelo, Charles (1500) | Lost 0-2 | -181482 |
| 4sealed | 118 | Kirton, Jon (1481) | Draw 0-0 | 01482 |
| 5sealed | 61 | Sia, Paul (1480) | Lost 0-0 | -181464 |
| 6sealed | 90 | Johnson, Mike (1481) | Lost 0-1 | -181446 |
| 7sealed | 72 | Moore, John (1464) | Lost 0-0 | -171429 |
| average opponent: 1484record: 1-5-1 | new rating: 1429 | |||