THE RULES:
Ordinary sudoku rules apply: place the digits 1 through 9 in each row, column, and 3x3 bold outlined box.
Spinal tap rule (these all go to 11) applies to all further rules. Every sum is 11. To wit:
-Spinal tap renban rule: digits on a purple line are consecutive and sum to 11.
-Spinal tap zipper line rule: Pairs of digits in cells on a grey zipper line that are equidistant from the midpoint of the line sum to the same number, and that number is always 11.
-Spinal Tap Region Sum rule: digits on a blue line sum to the same number in every box, and that sum is 11.
-Spinal Tap killer cage rule: the digits in each killer cage sum to the clue in the top left corner, if given. If no clue is given, the digits in the cage sum to 11.
-Spinal Tap Roman numeral rule: Digits separated by the Roman numeral XI sum to XI.
EXTRA CREDIT to the first puzzler to correctly explain the significance of the killer cage formation in a comment: cornish-john
My solution video
https://youtu.be/8yU9nxdvDEE?si=LmuDVPxzPK1YXtLJ
Solution code: Row 5, left to right.
on 20. January 2025, 21:51 by PuzzlePatzer
Brilliant - it took me 2 hours and cost me all of my tea and crayons! I thoroughly enjoyed it but unfortunately, I found out afterwards that there was no sound so unfortunately, no video :(
I am really happy you enjoyed it, and thank you for calling it brilliant. And sorry about your Spinal Tap moment with the sound crew.
Guess what? The sounds worked this time around :)
on 26. October 2024, 18:58 by Jrosas
Added effects to photo
on 25. October 2024, 15:38 by Guvenistan
Attention-to-detail in your coloring/pencil-marking is critical. It's so easy to make a mistake and then good luck in back-tracking.
on 25. October 2024, 07:31 by Mozart40
Somehow my brain kept trying to make dominos that added up to 10, so I needed to restart several times. Once I got used to the 11 rules, it was really fun.
on 25. October 2024, 01:02 by Jrosas
Yes. Well done, cornish-john
on 25. October 2024, 00:58 by cornish-john
Stonehenge looking a bit small in the grid!
| Difficulty: | ![]() |
| Rating: | 88 % |
| Solved: | 23 times |
| Observed: | 15 times |
| ID: | 000KEB |