Double Ambiguity
(Published on 22. October 2026, 18:21 by LittleNightmaresLady)
My first doublers/ambiguity puzzle.
Rules:
-Normal sudoku rules apply.
-There are 9 cells, one in each row/column/box, which are doublers. For the purposes of the constraints, doublers double the value of a cell. Each digit from 1-9 is doubled exactly once.
-A line with a circle/bulb is either an arrow or a thermo, the solver must determine which. Values on an arrow must sum to the value in the attached circle. Values along an thermo must increase from the bulb end. The two lines coming from the same circle may be of a different type. The different shade of grey in box 3 is just to distinguish lines.
-The value or the sum of the values in a cage must satisfy the condition in the top left corner of the cage. E means an even value, and O means an odd value.
Links:
F-puzzles
CTC
Rules:
-Normal sudoku rules apply.
-There are 9 cells, one in each row/column/box, which are doublers. For the purposes of the constraints, doublers double the value of a cell. Each digit from 1-9 is doubled exactly once.
-A line with a circle/bulb is either an arrow or a thermo, the solver must determine which. Values on an arrow must sum to the value in the attached circle. Values along an thermo must increase from the bulb end. The two lines coming from the same circle may be of a different type. The different shade of grey in box 3 is just to distinguish lines.
-The value or the sum of the values in a cage must satisfy the condition in the top left corner of the cage. E means an even value, and O means an odd value.
Links:
F-puzzles
CTC
Solution code: Column 2
Solved by kangaroo, JDP678, han233ing, Megalobrainiac
Comments
Last changed on 23. October 2026, 10:35
on 23. October 2026, 10:32 by LittleNightmaresLady
@han233ing thanks so much for solving and comment! This is one of my toughest puzzles I’ve ever made, but I really liked the idea, and the way it this turned out.
on 23. October 2026, 10:13 by han233ing
Quite hard x_x. The interaction between clues in c7c8 and doublers is complex but fascinating, and the rest of the puzzle is no less challenging.
Last changed on 23. October 2026, 05:33
on 23. October 2026, 04:46 by LittleNightmaresLady
@JDP678. Thanks so much for solving! Oh yeah, the start is pretty tricky for sure! I also did really like how this puzzle resolved too :D
on 23. October 2026, 04:41 by JDP678
I found the first half quite difficult, but the second resolved very nicely :)
