Kotchoff, Michael
Current rating: 1474
| Grand Prix Melbourne 2018 (GRN limited) | starting rating: 1449 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 147 | Gardner, Leroy (1480) | Won 2-0 | +191468 |
| 2sealed | 167 | Velvin, Richard (1500) | Won 2-0 | +191487 |
| 3sealed | 15 | Weyers, Beau (1511) | Lost 0-2 | -181469 |
| 4sealed | 230 | McCormack, Jacob (1523) | Won 2-1 | +191488 |
| 5sealed | 64 | Golding, Jacob (1681) | Won 2-1 | +211509 |
| 6sealed | 57 | Gibson, Kyle (1508) | Lost 0-2 | -181491 |
| 7sealed | 93 | Gabel, Carl (1539) | Lost 1-2 | -171474 |
| top | average opponent: 1535record: 4-3 | new rating: 1474 | ||
| Grand Prix Melbourne 2009 (ZEN limited) | starting rating: 1461 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 11 | Larcombe, Matthew (1518) | Won 2-0 | +191480 |
| 3sealed | 25 | Eckermann, Andrew (1564) | Lost 1-2 | -161464 |
| 4sealed | 73 | Marshall, Geoffrey (1518) | Lost 0-2 | -171447 |
| 5sealed | 145 | Goodall, Matthew (1554) | Won 2-1 | +191466 |
| 6sealed | 76 | Moore, Chris m (1515) | Lost 0-2 | -171449 |
| top | average opponent: 1534record: 2-3 | new rating: 1449 | ||
| Grand Prix Melbourne 2002 (ONS rochester) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 37 | Witton, Adam (1500) | Won 2-1 | +181518 |
| 2sealed | 25 | Zhao, David [AUS] (1500) | Won 2-1 | +181536 |
| 3sealed | 17 | Hong, Craig (1449) | Lost 1-2 | -201516 |
| 4sealed | 45 | Kemp, Adam (1443) | Lost 1-2 | -191497 |
| 5sealed | 56 | Colvin, Brendon (1499) | Lost 1-2 | -181479 |
| 6sealed | 67 | Ferguson, William (1486) | Lost 1-2 | -181461 |
| top | average opponent: 1480record: 2-4 | new rating: 1461 | ||