Logic Masters Deutschland e.V.

Happy Birthday DubiousMobius! 🥳

I can't think of a better puzzle-way to celebrate than a DubiousMobius-inspired double-torus chaos-construction. 🍩🍩

• Divide the grid into ten orthogonally connected regions and place the digits 0 to 9 once each in every row, column and region.
• The grid is a double torus: the edges of the grid are identified as the coloring indicates (for example, r5c10 is considered orthogonally adjacent to r1c1). Regions and arrow sightlines (orthogonal and diagonal) wrap around the edges of the grid. Diagonals do not wrap across the singular point, marked with a black diamond.
• Cells marked with letters have the same digit if and only if they have the same letter. Only letters from the title are used.
• Cells joined by a black dot have digits in a 1:2 ratio, and they belong to different regions. Not all possible dots are given.
• Cells marked with short blue arrows have a digit equal to the combined count of all the cells in its region that are seen in the direction of the arrows (including itself). Region borders break blue arrows' sight.
• Cells marked with long red arrows have a digit equal to the count of different regions seen in the indicated direction (including its own) before returning to its own region. (For example, if an arrow on region A has a sightline that goes A→B→C→B→A, its cell will contain a 3 since it sees regions A B C.)

Online in Sudokupad (and with extra identification tags)

See also:

• a handle buddy
• dear puzzle friend
• e m p t y = c h a o s
• blue lining white trenchcoat