Quattroquadri: Toroidal Numbered Rooms
(Published on 3. July 2025, 18:00 by Crusader175)
Rules:
Quattroquadri: Place a digit from 1-9 in each empty cell in the grid such that digits do not repeat in any row, column, or 3x3 box.
Toroidal Numbered Rooms: Clues outside the grid indicate the digit which has to be placed in the Nth cell in the corresponding direction, where N is the digit placed in the first cell in that direction. Rows and columns are toroidal, so if N is bigger than 6, the next cell after the 6th cell will be the first cell in the row/column again.
Puzzle Link: SudokuPad
My youtube channel on solving sudoku: Crusader Puzzle
Solution code: Row 2 Row 5
Comments
on 12. July 2025, 00:59 by Snaques
Another puzzle that required you to re-tune your brain a bit with 6x6 grid and toroidal numbering. Once that was internalized, the puzzle itself flowed really nicely and at the end didn't feel too hard.
It was pretty amazing to realize how the boxes work together when that was not at all what I was looking for.
Reply: Thanks Snaques! I always loved Numbered Rooms, and this was me exploring it in QQ grid and toroidal.
on 5. July 2025, 17:34 by h5663454
Nice puzzle, but...
I really want to know why there is no *numbered room* tag when there is even *Quattroquadri* tag... Could it be that *numbered room* is actually included in the *159* tag? ?
Reply: Thanks! I would definitely love to see Numbered Rooms tag or maybe Indexing tag in general.
on 4. July 2025, 21:10 by Hunsar
Very nice puzzle! I learned a new word!
Reply: Thanks for the solve Hunsar!
on 4. July 2025, 19:55 by e_reads
So fun! I loved how everything interacted with each other! It was really satisfying to have that rush of the solve at the end.
Reply: I'm happy with the interaction here. Thank you!
on 4. July 2025, 17:51 by Snookerfan
Fun puzzle! Thank you
Reply: Thanks Snookerfan! Glad you had fun solving it!
on 4. July 2025, 15:04 by Franjo
This was a pleasure to solve, and much more approachable than expected: 2*. for me. Thank you very much for creating and sharing this lovely puzzle.
Reply: Yeah I think it's between 2/3 for difficulty. And thank you for solving!
on 4. July 2025, 11:00 by Tacosian
Excellent, loved it
Reply: Thank you very much Tacosian! Glad you liked it!
on 4. July 2025, 10:46 by chameleon
Fun! :)
Reply: Glad you had fun! Thank you!
on 3. July 2025, 19:30 by dzamie
This one was slow going for a while, but the quickness that the end came with was very satisfying.
I do wonder if providing the rest of the room numbers would make it appreciably easier - I imagine that you've provided the minimum amount of clues necessary to solve.
Reply: The clues are specifically chosen to build my intended solve-path to the puzzle. Thanks for the solve dzamie!
