Logic Masters Deutschland e.V.

This puzzle is directly inspired by the puzzle Parity Snakes by Malrog.

Rules:
Normal Sudoku rules apply.

Digits in cells separated by a white dot must have consecutive values. Not all possible dots are necessarily given.

Each cell containing a circle is the head of an entropic snake, whose length is the digit in the circle. An entropic snake is a non-branching one-cell-wide path of orthogonally connected cells of the same entropic set (low [123], middle [456], or high [789]), which may not touch itself or other cells of the same entropic set orthogonally (it may touch either diagonally). A snake may not have two heads, and may consist of a single cell.