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Cat Sudoku levels

50 hand-ordered boards that get a little harder each time. Solved levels get a ✓ and your best time, saved in this browser.

5×5 boards: levels 1–8

6×6 boards: levels 9–18

7×7 boards: levels 19–30

8×8 boards: levels 31–42

9×9 boards: levels 43–50