#A27: Sudoku

 Sudoku is probably the most well-known paper puzzle. The base rules are very easy to understand. The grid size is often constrained to a square with less than a hundred cells, yet countless volumes have been filled with classic puzzles and brought to bookstores. I find it nice to solve a classic one every once in a while, but what really appeals to me about this type is its ability to act as a canvas for a ton of fantastic variant puzzles. Whereas classic sudoku might start to feel stale while solving tens in a row, variant sudoku always stays fresh and continues to deliver brand new logical ideas.

I'm reminded of my #A25 collection. I intend to make a megapuzzle for #A50.

4x4 Classic (f-puzzles)

12x2 Samurai (penpa)

6x6 Arrow and Thermo (f-puzzles)

6x6 "Missing Products" (penpa)

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