Palindrome Killer Sudoku
(Published on 8. August 2020, 23:02 by udukos)
Normal Sudoku rules apply.
An area surrounded by a dashed line will be called a cage. Digits may not repeat within a cage. A number in the top left corner of a cage indicates the sum of all the digits in that cage.
The green outline/figure represents a 21-digit palindrome the ends of which have to be deduced (i.e. the first digit and the last digit lie adjacent to each other on the green line).
An area surrounded by a dashed line will be called a cage. Digits may not repeat within a cage. A number in the top left corner of a cage indicates the sum of all the digits in that cage.
The green outline/figure represents a 21-digit palindrome the ends of which have to be deduced (i.e. the first digit and the last digit lie adjacent to each other on the green line).
Penpa link
Good luck. Have fun.
Solution code: Column 4 Column 6
Last changed on on 9. August 2020, 08:33
Solved by geronimo92, Imperial Marcher, Narayana, CptAhab, rimodech, kishy72, Julianl, Snowhare, tzael, Nejaru, SirWoezel, cdwg2000, wenchang, zorant, Krokant, NikolaZ, Queteimp, ManuH, polar, bosjo, Zoidzerg, Nylimb, Ragna, JonnyKaufman, bernhard, harrison, tinounou, Madmahogany, Uhu, 97johny, cfop, Vebby, Zzzyxas, zhergan, by81996672, OGRussHood
Comments
Last changed on 20. August 2020, 21:18
on 9. August 2020, 21:24 by tzael
great puzzle as always @udukos
@tzael thank you
on 9. August 2020, 08:33 by udukos
Increased the difficulty after the feedback
on 9. August 2020, 08:03 by Narayana
One last thing. If one flips the image horizontally the result looks like Texas!
on 9. August 2020, 07:36 by Narayana
Very satisfying at the end.
But beware I do NOT believe this is a 3-star puzzle. I am rating it 5.
Difficulty is very subjective, but I am not exaggerating when I say this is at least one of the top 10 hardest puzzles I have solved in the last 3 months. But it is possible I totally missed some easier ways to solve it. [To be continued in hidden].
