Normal sudoku rules apply.
Numbers in the small white circles must appear in at least one of the four cells touching that circle. They can repeat in the surrounding four cells if permitted by normal sudoku rules.
Try Quadruples on your choice of:
Solution code: Row 1 followed by column 1.
on 17. May 2023, 05:03 by kuraban
Typo corrected.
on 11. April 2022, 05:40 by Nightingale's Code
Really enjoyed this one, thanks!
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