Place the digits 1-9 in every row, column, and orthogonally connected region, to be determined by the user.
The four following rules apply:
1. Each region is a 3x3 box.
2. White dots between cells represent consecutive numbers, black dots a 2:1 ratio. In each case, neither cell shares a region.
3. V's sum to 5, and X's to 10. In each case, both cells share a region.
4. At least two of these four rules are always lying, including this one. (For example, if rule three is lying, cells do not sum to five, and must not share a region.)
Hint 1: Can rule 4 and any other rule both be true?
Hint 2: What happens to the regions if rule 2 is false?
Hint 3: What happens to the regions if rule 2 is true and rule 3 is false?
The puzzle:
Play here:
Solution code: Row 7 with dashes representing region borders, e.g. 12-345-678-9
on 11. April 2026, 00:07 by firespire
Perfect difficulty for me.
on 8. April 2026, 09:27 by kingoffries
- probably more two star
on 8. April 2026, 02:35 by sfield
This isn't a 3 star. Took me just over 10 minutes, including figuring out the trick with the rules. I would say this is a 2 star because of the trick. And without the trick, it is a 1 star.
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Thanks for the feedback! This is my first time making an easier puzzle.