All in or All out
(Published on 5. September 2026, 09:15 by tigran)
This is my first published puzzle. I've tried to create a new rule that brings forth an interesting pattern. I hope you'll enjoy it.
Rules
- Normal Sudoku rules apply.
- Shade a digit in each row, column, diagonal, box, and relative position (in the box) such that for each shaded digit D in column C, row R, box B, position P either D=C=R=B=P OR D≠C≠R≠B≠P, i.e. D, C, R, B, P are either all the same or are all different. (The boxes and the relative positions are numbered starting from the top-left corner, moving left to right, row by row.)
- Shaded cells form a complete set of the digits 1-9.
- Digits do not repeat along the marked diagonals.
- Digits separated by a white dot are consecutive.
- Digits separated by a black dot are in a 1:2 ratio.
Solution code: Row 1 from left to right
Comments
on 8. September 2026, 17:43 by tigran
Changed a tag
on 8. September 2026, 17:42 by tigran
Dear itsid, the shaded digits need to be a disjoint group, which should be found by the solver. You're right that the puzzle is not an overall disjoint puzzle. Thanks for pointing it out, I'll remove the tag.
on 8. September 2026, 16:30 by itsid
uhmmmm... how is this a disjoint group puzzle?
remove the tag very misleading
on 7. September 2026, 09:39 by alarark50
this puzzle was quite enjoyable, thanks! I felt that discovering the shaded digits required a bit tedious work, but it was quite smooth after that. Couldn't really decide if it's 2* or 3* but it feels closer to a 3.
on 5. September 2026, 13:37 by tigran
Clarification of a rule.
on 5. September 2026, 13:36 by tigran
SudokuFan D≠C≠R≠B≠P means all are different.
on 5. September 2026, 11:43 by SudokuFan
Does D≠C≠R≠B≠P mean that D, C, R, B and P are all different or just that D≠C and C≠R and R≠B and B≠P?
on 5. September 2026, 09:32 by tigran
Added additional tags to better describe the puzzle.
