Logic Masters Deutschland e.V.

Rules:

Normal Sudoku rules apply.

Draw a one-cell-wide loop of orthogonally connected cells. The loop may not touch itself, not even diagonally.

The loop acts as an entropic line. Each set of three adjacent digits along the loop must be one low [123], one medium [456], and one high digit [789].

XV: Digits separated by an X must sum to 10. Digits separated by a V must sum to 5. Not all possible Xs and Vs are necessarily given.

For each X and V, at least one of the digits touching the X or V must be on the loop.

The given less-than sign points towards the lower of two neighboring digits.