Logic Masters Deutschland e.V.

                                                                          click image to play

The King's Daughter.

Normal 9x9 sudoku rules apply.

Digits a king's move away in chess can not repeat.

Draw a 1-cell wide loop that visits each box at least once, moves strictly orthogonally and doesn't branch or intersect itself. The loop doesn't touch itself, not even diagonally.

The loop acts as a dutch whispers line. Neighbouring digits on the loop must have a difference of at least 3.

A digit in a circle indicates how many times that digit must appear in circles. 

The circled digits also indicate how many of the up to 8 surrounding cells are on the loop.

Circles are never on the loop.

Digits separated by a grey dot are either consecutive or have a 1:2 ratio. A dot on a corner means both diagonal pairs follow one of two constraints, however they don't necessarily have to follow the same constraint.

Meaning one diagonal pair could be consecutive while the other pair has a 1:2 ratio.

Have fun.