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No-straight-ahead maze
(This is a post that originally appeared on my blog.)
I made a maze. Enter and exit at the arrows. So that it’s not too easy, there’s a snag: when you come to a diamond junction, you must make a 90 degree turn, left or right. Going straight across (or turning back) is not allowed!

Full-size version (new window.)
How many diamonds did you pass through?