Region Sum Hitlines
(Published on 5. August 2026, 17:05 by Prof.Dori)
Region Sum Hitlines
Rules:
Normal sudoku rules apply.
Digits on a line can't repeat. We say a digit on a line is a 'hit' if it matches its position on that line, starting at the end with the square (which is 'position 1'). Eg: a line reading 423 would have two 'hits'; 2 (in position 2) and 3 (in position 3).
Additionally, box borders divide a line into segments. The sum of hits on each segment is the same (but this sum may be different for different lines). Every line has at least one hit.
Click here to start the puzzle
Solution code: Row 8.
Comments
on 17. August 2026, 17:23 by yuripuppies
A perfect 3* puzzle! Took me an hour of careful thinking, but at no point did I feel hopeless
on 17. August 2026, 10:45 by firespire
I try to stay clear of my nemeses - the 3 star difficuly category and region sum lines but gave it a try after stumbling through your 4x4 pack.
Glad you made me face my fears as it was really good.
on 13. August 2026, 20:50 by davidz32z
Now that's how you making pointing digits fun! What a delight!!
on 13. August 2026, 12:27 by Lithium-Ion
Beautiful puzzle. One of the best 3 star puzzles out there! Thank you so much for 45 minutes of pure fun.
on 11. August 2026, 13:01 by jez9999
Found it tricky towards the end. Tip: if you think you've fully used all the clues, check, check again!
on 6. August 2026, 20:52 by kisukeA
Very cool puzzle, just under 3* for me, high 2*
on 6. August 2026, 16:22 by SchneizelStein
Very cool idea with the hitlines. I loved trying to figure this one out.
on 5. August 2026, 22:46 by wuc
Crazy how this weak constraint can make it have an unique solution. Love the break in. 3* to me. Great setting thx.
on 5. August 2026, 21:55 by marcmees
very nice. Thanks
on 5. August 2026, 20:00 by amirs
Very nice and smooth!
on 5. August 2026, 18:02 by MartinR
Very interesting constraint
