Brain Teasers & Elegant Traps

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Across
  1. 6. Puzzle hard to explain
  2. 8. Shadowed profile
  3. 10. Your uncanny double
  4. 13. Contradictory phrase like jumbo shrimp
  5. 14. Word with similar meaning
  6. 16. Tales of gods and monsters
  7. 17. Archimedes' moment
  8. 19. Old saying with wisdom
Down
  1. 1. Riddle with no easy answer
  2. 2. Lack of clear meaning
  3. 3. Indirect literary reference
  4. 4. Encrypted message
  5. 5. Irony’s sharper cousin
  6. 7. Three-line Japanese poem
  7. 9. Moon hiding the sun
  8. 11. Word same backward and forward
  9. 12. When the opposite is true
  10. 15. Longing for the past
  11. 16. Saying it’s something it’s not
  12. 18. Comparison for clarity