Logic Masters Deutschland e.V.

Inspired by LMI's Nurimisaki Nomad competition, which was expertly constructed by Frostini, I set a hybrid Nurimisaki/German Whispers puzzle. I'm quite pleased with how it turned out.

Standard Sudoku Rules Apply.

Nurimisaki Rules Apply.
Shade some cells so that the remaining unshaded cells form one orthogonally connected area. No 2x2 region may be entirely shaded or unshaded. Circles mark every instance of a cell which is unshaded and orthogonally adjacent to exactly one other unshaded cell. If a circle contains a number, it indicates how many cells are in the straight line of unshaded cells coming out of the cell with the circle, including itself.

Fill the grid with digits and shading based on the following constraints.

Circle cells. Circle cells will be filled with digits that are valid nurimisaki clues. These cells should be considered the start of a network of german whispers lines.
German Whispers. If orthogonal unshaded cells are not connected by a kropki dot (see below), they are considered to be on a german whisper line along the nurimisaki path. Adjacent digits on a German whisper line must vary by at least 5.
Kropki Pairs. If two cells are connected by kropki dots, both cells must remain unshaded. These cells are on the nurimisake "path", but unlike the German whisper relationships, the pair of digits will either:
1) be consecutive if separated by an empty white dot,
2) form a 2:1 ratio if separated by a black dot, or
3) vary by a difference of 3 if separated by a white dot labelled "3".