Public
YouTube
Mark Goodliffe
Some Special Lines - in London?
Duration:
34:35
Published:
Oct 24, 2026
Views:
19,109
Intro Music: Mozart's Sonata No. 16 - Lucy Audrin (Piano)
Outro Music: Mark's Outro Music - Riffclown
Video Bookmarks & Timestamps 10
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Contained Puzzles (1)
Links & RulesSissa Visits London
by
Patrick Junke
Variant Sudoku
View Puzzle Rules ↓
Standard Sudoku rules apply:
Place the digits 1–9 exactly once in each row, column, and 3×3 box.
Fog of war:
A correct digit placed in a cell (by deduction) clears the fog around it, which may reveal new hidden clues.
Sissa's Lines:
Each line has a beginning and an end, but neither is marked.
Every cell on a line has an associated value. Starting from the beginning of the line, each cell’s value is twice the value of the previous cell.
The digit in each cell is the digital root of its value: keep adding the digits of the number until you get a single digit from 1 to 9.
Example:
A cell with value 32 contains 5 (3 + 2 = 5).
The next cell has value 64 and therefore contains 1 (6 + 4 = 10 → 1 + 0 = 1).
On each line, exactly one cell matches its value.