How do difficulty levels in puzzles, such as jigsaw puzzles or Sudoku, get determined, and what strategies can be used to improve one's ability to solve them?

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on July 18 2025 at 05:42 PM in Puzzles

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How do difficulty levels in puzzles, such as jigsaw puzzles or Sudoku, get determined, and what strategies can be used to improve one's ability to solve them?