Based on the Inkastare Tavling scoring system built by GVB, I painted by own "house", threw 10, and scored them.
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 I got this group scored at:

2 at 3 points = 6
5 at 2 points = 10
3 at 1 point = 3

Total: 19

I like the idea of this "skills competition" like this, and 8m shot competitions. I want to see this play out someday in a tournament. You can continue the discussion at ask.planetkubb.com, specifically the question "How about a Kubb Tossing as its Own Contest".