RustySword won 9 games straight and became 9-dan!

The road from 8d to 9d is not that far, but you have to win your games straight, like RustySword did.
There are lot of players with just good scores - 60-70%, roln111, 8-dan, for example, but it's not enough, it seems.
You must not lose at all, if you want to get the promotion!