Challenge 10 has been solved with three features. My first try took four features, but I finally figured it out:
Good job solving the puzzle. I created a new SOLUTION page for puzzle #10, and moved your original image to it. That way people will only see a solution if they want to.
When posting images in this puzzle page, the feature tree should be obscured somehow, as in this example:
Some additional solutions to this puzzle:
Yahya T Khedr:
If you don't receive the email within an hour (and you've checked your Spam folder), email us as firstname.lastname@example.org.