Long Messy Region Sum Line / Lange unordentliche Region Sum Line
(Published on 13. October 2022, 16:13 by PDN777)
Normal sudoku rules apply. The digits along a blue region sum line must have the same sum in each 3x3 box entered by the line. The sum "resets" if the line exits and later re-enters a box. So for example R6C1+R5C1+R4C1 = R2C7+R3C8 = R6C3+R5C2+R4C3. And so on... Digits in a quadruple circle must appear in the surrounding cells. Neighboring digits marked with a black Kropki dot have a 2 to 1 ratio. ALL black dots ARE given. I think this puzzle is 2.5 stars out of 5 for difficulty for many solvers. As always, comments welcome. Thanks!
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Solution code: First row of puzzle, and fourth column of puzzle (read top to bottom). Enter as a string of 18 digits, no spaces.
Comments
on 17. October 2022, 20:16 by Baklin
Really enjoyed this one. Once I kept an eye on the negative constraint.
** Yes it seems many folks (including myself) had trouble remembering this!
on 14. October 2022, 15:59 by PDN777
@nunc, @Snooker, @sujoy, @ordnance, and @Platinum: thanks so much for the solves and comments. Yeah - when I was test solving, I too forgot the dot negative constraint! LOL. Have a great day! :-)
on 13. October 2022, 22:07 by Platinum
Like Sujoyku, must learn to read all the rules to the end ha ha, lovely puzzle, and loved that you needed to keep switching places for the next deduction
on 13. October 2022, 20:01 by sujoyku
After my initial problems (reading the rules carefully apparently was above me), the solve became very smooth as well. The puzzle is very fun. I especially loved figuring out the black dots while the sum line is "transporting" a lot of information around the grid. Thank you for yet another beautiful puzzle, PDN777!
on 13. October 2022, 19:40 by ordnanceordinance
Nice break in and smooth solve. I would guess this goes down to 2 star difficulty though
on 13. October 2022, 19:40 by sujoyku
Thank you for your comment, Snookerfan! Fortunately I glimpsed at it. I also completely missed the negative constraint ...
Let's see if I am suceeding now. :)
on 13. October 2022, 18:46 by Snookerfan
I enjoyed this one very much. My mistake was to still miss the capitalized words ALL and ARE for a while. Thank you!
on 13. October 2022, 18:42 by nunc
Very nice with a smooth flow (whenever the solver (me) doesn't miss obvious things that are sitting there for a long time..:-). Thank you!
