Logic Masters Deutschland e.V.

Normal Sudoku rules apply. Every distinctly colored 'mode' line contains a unique set of digits adding up to 12. The sets themselves consist of digit groups that are repeated at least once, fully and in the exact order along their lines (i.e. a six-digit 'mode' reading 13-13-13 would be valid, 13-13-31 would not). In the grid, two orthogonally adjacent digits may NEVER add up to 12.

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Here's a simplified example of what part of the grid would look like with all the rules applied:



And here's what the puzzle actually looks like: