This is a Magic Square Puzzle.  When you click the 'Start Game' button, there will be a square shown below, with between 3 and 6 entries in each row and column.

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A magic square has an equal number of entries in each row and column.  E.g., a 3x3 magic square has 9 entries, a 4x4 magic square has 16 entries, etc.  Each number in the range 1..(number of entries) must be placed in exactly one entry of the puzzle.  The goal is to put numbers in entries such that every row, column, and major diagonal sum to the same 'magic number'.  The magic number will be shown above the puzzle.

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When the puzzle is generated, a number of entries will be prefilled in.  These are correct values for the generated puzzle and cannot be changed.

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If you've never done a magic square puzzle before, start with 3x3 puzzles until you get comfortable with it, then you can move up to a 4x4 puzzle.  The difficulty increases quickly with the size of the puzzle!

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You can click the 'show answer' button at the bottom of the puzzle to see the solution.

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Click the 'Start Game' button to get started.