Algorithm for winning stars in the Arena

[Shutica]

What is the algorithm that decides how many stars are awarded for a win in the Arena? I just won a challenge by 43k to 27k but was only awarded 9 stars.  What determines whether you win 9 or 10 stars?

Topic

[jo-ha]

Unfortunately I cannot link a post here, so I’m going to quote @yue-zhang at this point. I asked the same question in the arena topic and this was the answer:

Star counting of arena match has been revealed for a long time.
When you outscored your opponent by 7% you got 6 stars
15%, 7 stars
25%, 8 stars
45%, 9 stars
80%, 10 stars
In short, it’s not on how many score you were ahead of your opponent.
For example, if your opponent got 30M in the match, you needed to score 54M at least, to got 10 stars.

These numbers are based on a table yue-zhang posted as well. If you want to take a look at it, go to page 126 of the arena thread and scroll about half way down. You’ll see yue-zhang’s table.