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[null,"Beginner Puzzles"]
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[null,"Instructions"]
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[]
[null,"Goal"]
[null,"Fill all empty cells so that the numbers 1 through 9 appear exactly once in each row, column, and 3x3 box."]
[null,"There are three difficulties: Beginner, Intermediate, and Expert."]
[]
[null,"Beginner"]
[null,"This level is for those new to the game. Formatting clues along the way help guide you to an answer and learn the ropes."]
[]
[null,"Expert"]
[null,"This level is for those familiar with the game and looking for a challenge. No guides or helpful hints here!"]