hardest crossword puzzle in histroy

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Across
  1. 3. a poem or word puzzle or other compostiton in which certain
  2. 8. in each line
  3. 9. a puzzle in which each clue is a word puzzle.
  4. 10. a grid of lack and white squares
Down
  1. 1. word two clues for one definition
  2. 2. in a crossword with clues
  3. 4. a type of word puzzle that consists of a short piece of encrypted text
  4. 5. a word or phrase or formed rearranging the letters
  5. 6. sums digits from 1 to 9 are entered to the spaces
  6. 7. word a clue in which the answer is embedded in itself