Logic Masters Deutschland e.V.

Rules:

Normal sudoku rules apply: Place the digits 1-9 once each in every row, column and 3x3 box.

Adjacent digits along a green line must have a difference of at least 5.

Adjacent digits along an orange line must have a difference of at least 4.

The red line is entropic: Any three adjacent digits along the line must consist of one low (1,2,3), one medium (4,5,6) and one high (7,8,9) digit.

The presents under the tree have the same sum.

The star at the top of the tree has a larger digit than any of the orthogonally adjacent digits.

Sudokupad