Gridunlocked (Tren Hybrid)
(Published on 16. July 2024, 15:47 by sfushidahardy)
This puzzle combines the pencil puzzle "tren" with sudoku. I hope you enjoy it! There's an example to demonstrate the rules at the bottom of the page.
- Standard sudoku rules apply.
- Tren: shade some 1x2 and 1x3 cages vertically or horizontally. Every cage contains a digit (called its 'mobility') which indicates the number of unshaded cells it can see along its longest axis. Shaded cells block this vision. All unshaded cells form one orthogonally connected group, and distinct cages may touch orthogonally.
- Killer construction: each "corner clue" on the grid belongs to a cage, and indicates the sum of the digits in that cage. The digit in the clued cell is the mobility of the cage. Corner clues might not be in the top-left cell of a cage, and the values of some corner clues must be deduced by the solver.
- Note that some cages might not be marked with a corner clue, but must still contain their mobilities.
Here's an example grid to demonstrate the rules!
Solution code: The unshaded cells in row 7
Comments
on 25. October 2024, 22:56 by Piatato
Awesome puzzle, very nice and clean solve!
on 18. July 2024, 10:31 by Wessel Strijkstra
very nice, clean ruleset and fun solve, nicely done:)
on 18. July 2024, 10:20 by applesauce
very fun & interesting logic! I've never done a pure tren puzzle before, but you made it work very well as a hybrid
on 16. July 2024, 20:28 by erml
So well constructed! Brilliant!
on 16. July 2024, 17:52 by someguy209
I'm so surprised I haven't see a tren sudoku before, this felt so natural! Loved the break-in and box 9 the most.
on 16. July 2024, 16:14 by sfushidahardy
Removed practice puzzle; it wasn't unique in its present form.
