Logic Masters Deutschland e.V.

Rules

Normal Sudoku rules apply; each row, column and box contains the digits 1–9, once each.

Each digit shares divisibility with at least one orthogonally-adjacent digit.

Comments

To share divisibility means that the lesser divides the greater without remainder; for example, digits 2 and 8 share divisibility, but digits 2 and 9 do not.

Orthogonally-adjacent means a cell which shares the edge directly left, right, up or down.

The given grid has almost 13 million Sudoku solutions, but only one solution which satisfies the divisibility rule!

Puzzle

Solve at F-Puzzles.