Winthrop, Michael
Current rating: 1447
Record: 4-7
| Grand Prix Brisbane 2004 (COK limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 9 | Worrell, Chris (1432) | Won 2-1 | +171481 |
| 2sealed | 38 | Soo, Simon (1518) | Lost 0-2 | -171464 |
| 3sealed | 48 | Sheppard, Gary (1483) | Won 2-1 | +181482 |
| 4sealed | 75 | Hughes, Peter (1517) | Lost 0-2 | -171465 |
| 5sealed | 78 | Lee, Eric [AUS] (1434) | Won 2-0 | +171482 |
| 6sealed | 71 | West, Michael [AUS] (1518) | Lost 0-2 | -171465 |
| 7sealed | 64 | Chin Quan, Audrey (1479) | Lost 0-2 | -181447 |
| average opponent: 1483record: 3-4 | new rating: 1447 | |||
| Grand Prix Brisbane 2001 (ODY limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 29 | Cornish, Ernest (1500) | Won 2-0 | +181518 |
| 2sealed | 27 | Cowley, Tarl (1518) | Lost 0-2 | -181500 |
| 3sealed | 45 | Royle, George (1498) | Lost 0-2 | -181482 |
| 4sealed | 76 | Tappin, Andrew (1482) | Lost 0-2 | -181464 |
| average opponent: 1500record: 1-3 | new rating: 1464 | |||