Logic Masters Deutschland e.V.

Every row, column and region contains digits 1-6. Regions are to be determined by the solver. Every regions is a snake, a one cell wide path of orthogonally connected cells that does not branch or contain a 2x2 block of cells.

Cells a chess knight's move apart cannot contain the same digit.

Grey line is a palindrome, which reads the same in both directions.

Each circled cell contains a digit matching the total number of cells from its own region that are visible in its own row and column combined (including itself), with region borders blocking vision.

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