Logic Masters Deutschland e.V.

Rules
DOPPELGANGER
– Every row, column, and box contains the digit 0 always, as well as five out of the six digits from 1 to 6 (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.
(Tracker cells need to be filled for solution check to work)
CONSTRAINTS
– V: Digits separated by a V sum to 5.
– 10 LINES: Each blue line consists of one or more contiguous groups of cells, each of which sums to 10. Groups cannot overlap.

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