puzzler

noun6

1. •
   A puzzling situation or problem.

   • And reason cannot answer that question, because it exists outside of reason. It’s a puzzler, right? A real head-scratcher? Which brings us back to me. — 2012
2. •
   A puzzling person.
3. •
   One who is mysterious.
4. •
   A video game in which the player is presented with (usually abstract) puzzles to solve.
5. •
   A person who solves puzzles as a hobby.

   • […] he commits what to a hardened puzzler seems an unforgivable sin when he uses a picture of a two-masted ship followed by HTER for the word BRIGHTER. — 1927
6. •
   One who devises puzzles for others to solve.