Rules:
Normal sudoku rules apply.
KROPKI: If two digits are joined by a black dot, one is double the other.
NUMBERED ROOMS: Every blue square contains a Numbered Rooms clue, which has been written in invisible ink. This digit on a blue square appears in its row or column exactly X cells away from that blue square, where X is the first digit encountered.
Oh, one more thing... all the blue squares contain the same clue.
Solution code: Row 3 from left to right
on 7. August 2026, 10:37 by Klausku
Nice one!
on 2. August 2026, 02:58 by amchap
Huh. That's interesting isn't it. Very nice.
on 1. August 2026, 22:06 by JVA
Took me 49 minutes to solve, with the help of an Excel spreadsheet.
on 1. August 2026, 17:18 by pmays123
Fascinating puzzle. Thank you for sharing!
on 1. August 2026, 17:01 by HeyItsErin
Really fun and interesting puzzle! One of those descriptions that you read and can’t help but think “…really? That’s possible?”
on 1. August 2026, 10:36 by Snaques
I think this was one of coolest sudokus I've done. It's not that it was that hard, but the way it worked itself out from basically nothing.
Very fun to figure out what the restrictions actually are here.
PS. I wonder if it's more rewarding or annoying to come up with these one off puzzles. While the puzzle itself was great, I think there isn't much there to use for future puzzles.
on 1. August 2026, 09:07 by Franjo
Thank you very much for creating (or discovering?) and sharing this funny puzzle.
on 1. August 2026, 02:28 by mscha
Cute li'l puzzle!
on 31. July 2026, 23:58 by 0wifi
fun little thing, enjoyable for a less experienced solver like me
on 31. July 2026, 23:30 by GeorgeTheToad2
Nice one.
| Difficulty: | ![]() |
| Rating: | 95 % |
| Solved: | 197 times |
| Observed: | 1 times |
| ID: | 000RAS |