Circular Reasoning
(Published on 21. September 2026, 04:05 by vitray)
Normal sudoku rules apply: place the digits 1 to 9 in every row, column, and 3x3 box.
Anti-king: Cells separated by a king's move (in chess) may not contain the same digit.
Counting circles: A digit in a circle appears in circles exactly that many times.
Kropki: Digits separated by a white dot are consecutive. Not all dots are given.
Solve online in SudokuPad.
Solution code: Row 2 (9 digits)
Comments
on 22. September 2026, 11:30 by damo_89
This was a very hard puzzle until I reread the rules and saw an anti king constraint :)
Lovely and simple after that
on 21. September 2026, 20:54 by abw
Very nice! Fairly easy if you're familiar with counting circles. Took just over 20 minutes for me.
on 21. September 2026, 14:16 by rojspencer
Bit of a stinger in the tail but otherwise fairly straight forward and approachable.
on 21. September 2026, 13:31 by michael_787
Clever construction. Satisfying to see everything fall into place.
on 21. September 2026, 04:58 by YoooDeej
lovely snack, thank you ^_^
on 21. September 2026, 04:35 by macintux
Fast, fun start. Took a while to make the last significant deduction, just because there were too many places to look, but still under 20 minutes, which is about as good as a 1 star gets for me.
Thanks.
