Logic Masters Deutschland e.V.

Rules:

Normal Sudoku rules apply.

X Sudoku: The indicated diagonals cannot contain repeated digits.

Kropki dots: Cells separated by a black kropki dot have a ratio of 1:2. Cells separated by a white kropki dot have a difference of 1. Not all dots are given.

Between lines: Digits on a line connecting two circled cells must be between the digits in those circles (i.e. the digit in one circle is greater than all digits on the line, while the digit in the other circle is smaller than all digits on the line).

Links:

f-puzzles

Sudokulab

CtC Solver