Erica 28 (Double Numbered Rooms Edition)
(Published on 14. December 2025, 17:15 by SennyK)
Today Erica is hosting numbered rooms :-)
I estimate difficulty to be 2.5*.
I hope you will enjoy and I would be really grateful for all the comments and ratings.
Normal sudoku rules apply.
German whisper: Neighbouring/adjacent digits along a green line have a difference of at least 5.
Numbered Rooms: All outside cells on a clue must contain a digit D. That digit must also appear in the Nth cell looking into the grid in the row/column, where N is the digit in the first position. Additionally, all given outside clues without cells are also numbered rooms. Their digit must appear in the Dth cell looking into the grid in the row/column, and the outside clue cell is counted as 1st cell for them. Please see an example below for better understanding.
Double Numbered Rooms Explanation:
Digit D placed on the outside cell clue gives the position of the given black digit outside the grid, where the outside cell with clue is being counted as a first cell. Therefore, you can also imagine that you need to place the black given digit outside the grid in the position D-1 in the grid.
If you liked this puzzle, I recommend trying out my other puzzles: The Erica Series:★☆☆☆☆: 1, 2, 4, 5, 6, 12, 15, 17, 23, 26, 27
★★☆☆☆: 3, 7, 8, 10, 11, 13, 14, 16, 18, 20, 24, 25
★★★☆☆: 9, 19, 21, 22 Shading/Ying-Yang:
★★☆☆☆: Pretty Odd Shaded Area
★★★☆☆: (+5)-Yang, Negative 8 YY
★★★★★: Why-Why? Fog of War:
★☆☆☆☆: Erica 12, Erica 17
★★☆☆☆: It's What You Do in the Dark That Puts You in the Light, Find It All, What the Fog?, Erica 20
★★★☆☆: Broken Flashlight in the Dark Pencil Puzzle/Sudoku Hybrid:
★★☆☆☆: Masyu (Short) Sudoku
★★★☆☆: Tetromino Sudoku
Various Puzzles:
★☆☆☆☆: Blown Fuses in Electrical Installation, Let Me Introduce Myself, French Wrench
★★☆☆☆: Symmetrical Fan, Night Club, Important Hour on the Clock, What Was the Sum Again?, Disgroup Joints, 10-Arrows, Antiking Dutch Skyscrapers
★★★☆☆: Cops & Robbers, Positive Symmetry, Doppelgänger Killer 1-25
★★★★☆: Liars. Liars Everywhere.
Solution code: Fifth (5th) row of the grid from left to right.
Comments
on 16. December 2025, 01:51 by sfield
For me, it was more like a 2 than a 3. Once I had the break in and got most of it worked out, the ending still took me a while, which is why it is probably a high 2. But I never got too stuck for too long and everything had a logical solution, keeping track of only a few possible cases.
on 15. December 2025, 10:37 by philolologue
This was definitely hard 4-star for me, I know I missed out on some piece of logic somewhere, because I ended up just using my gut to guess which of three digits I'd narrowed the top center outer clue down to, and got lucky. I'm still not sure what the break-in was there without guessing, but it flowed smoothly from there and was GREAT fun, definitely enjoyed every minute! 50 min solve for me.
on 14. December 2025, 19:23 by Merdock
An absolute pleasure the play.
