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Sudoku puzzles (Su Doku)

My database includes 224 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every 2x2 box contains the digits 1 through 4. Greater than/lesser than-signs should also be correct. There is only 1 solution for each puzzle.

If you have a better html-code for these puzzles, let me know.

For more information check out Wikipedia.

77354 puzzles downloaded.

Showing puzzle number: 151
Difficulty: Super easy (0)
Solution methods: SiSo
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