Logic Masters Deutschland e.V.

This puzzle comes from my love for a ruleset I discovered about a year ago which is the Doppelganger. This puzzle might feel hard if it's your first time encountering the variant. Make sure to check Kafkapharnaum's puzzles as he's the creator of the ruleset and he has plenty of them waiting to be solved. Anyway, enjoy solving!



Solve on Sudokupad (with track cells)


GERMAN WHISPER LINES
• Along green lines, any pair of adjacent digits must have a difference of at least 5.

X-SUMS
• Clues outside the grid show the sum of the first X digits from that direction, where X is the first of those digits.
• Additionally the first X digits act like a straight german whisper line of length X (i.e. if an outside clue is 14 then 392 is valid but not 374 nor 329)

DOPPELGANGER
• Every row, column, and box contains the digit 0 always, as well as eight out of the nine digits from 1 to 9 (ie, it's missing one digit that is not 0)
• No two row, no two column, and no two box may be missing the same digit
• For each 0 in the grid, the digits missing in its row, its column, and its box must be three different digits •
• Cells outside the grid are used to put the digit missing in the row/column/box (i.e. if the digit 2 was missing from box 1, there would be a 2 in the first cell of the box outside the grid)