Logic Masters Deutschland e.V.

In celebration of Dot Day 2025, this puzzle is rugged smile.

Rules:

Normal sudoku rules apply.

The face and mouth are region sum lines. The nose is just for looks. Box borders split the lines into segments, which have equal sums. Different lines may have different sums.

The circles for eyes are odd.

The black dots separate digits in a 1:2 ratio.

The killer cages add to 15 and 9 respectively.

The teeth are consecutive digits, meaning the adjacent cells have a difference of 1.

Play on SudokuPad.