German Whispers and Numbered Rooms both absolute S tier constraints, so why not combine them? Consensus testing estimate was 2 to 3 stars. Good luck!
Download full solution guide (PDF)
Numbered Rooms Example
If you are new to numbered rooms they can look a bit intimidating. This image should clarify how they work. The 3 in R1C1 is saying to place 7 in the 3rd position, i.e. R1C3. The 6 in R1C9 is saying to place the 9 in the 6th position, i.e. R1C4. The 2 in R1C5 is saying to place 8 in the 2nd position, i.e. R2C5.
Solution code: Row 7 (digits in the grid only - 9 digits)
on 20. June 2026, 18:29 by damo_89
Added image example for Numbered Rooms
on 4. May 2026, 13:53 by Qodec
Very, very nice!
on 3. May 2026, 17:42 by rojspencer
Very nice puzzle.
on 3. May 2026, 15:48 by CitrusGremlin
fun puzzle!!
on 3. May 2026, 04:30 by Crusader175
Fun puzzle!
on 3. May 2026, 01:33 by Dr Logic
WOW. What a puzzle!
on 3. May 2026, 01:12 by Perladel
This puzzle was lots of fun!
Anyway I would specify something about the direction of the numbered rooms contraint
Damo: That is a good point. I've added an image example that should hopefully clarify for people seeing numbered rooms for the first time