Logic Masters Deutschland e.V.

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

Sven Neumann’s Sudokupad

Spinal Tap clip