Roman Fortress
(Published on 24. March 2026, 21:24 by mimec)
My today's puzzle is a traditional XV pairs sudoku with a small twist.
Rules:
- Normal sudoku rules apply.
- Cells connected by an X must sum to 10. Cells connected by a V must sum to 5.
- In every pair of cells connected by an X or a V, one of the cells is smaller than all adjacent cells, and the other cell is greater than all adjacent cells.
In the following example, the blue 4 is smaller than all four adjacent cells, and the orange 6 is greater than all three adjacent cells:
Note: There is no negative constraint in this puzzle, i.e. cells which are not connected by an X or a V can still sum to 10 or 5. However, the min/max rule only applies if there is an X or a V.
Solution code: Row 9
Comments
on 7. April 2026, 17:45 by Jaler
Love it!!! I'm new to the sudoku variants but this was an awesome experience.
on 25. March 2026, 11:24 by Snookerfan
Very nice! Easy start, but quite tricky afterwards. Fun challenge, thanks
on 25. March 2026, 05:55 by Elliott810
Brilliant puzzle! Thank you:)
on 24. March 2026, 23:45 by Qodec
Loads of fun, loved that!
on 24. March 2026, 22:52 by Ecem1903
This was very fun actually! Once you figure out the break-in it flows rather smoothly.
