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Across 3. words placed in a grid 4. a technical contraption 6. mixed puzzles to for this puzzle 7. rearrange the pieces into new shapes 8. Block of multiple colors 9. Numbers 11. word game 13. number-placement 15. word play 16. pegs on a board 17. collection of paths 18. dissection puzzle 19. slide tiles

Down 1. rectangular grid 2. Two photos 5. deriving from the mathematics field of deduction 10. To encode 12. interlocking pieces 13. player pushes boxes or crates around 14. a paper and pencil guessing game