Logic Masters Deutschland e.V.

Heads up that this puzzle is a bit more difficult than the ones we have recently been posting.

Normal sudoku rules: Every row, column, and box must contain a complete set of the digits 1-9.

Mod-4 Lines: Any three adjacent cells along the line must contain digits with three different remainders when divided by 4.

Kropki pairs: Cells separated by a black dot have a 1:2 ratio. Cells separated by a white dot must be consecutive. Not all dots are necessarily given.

Try the puzzle on the SudokuPad app by Sven Neumann.

You can find a complete list of our puzzles on LMD here. Please also visit us at Missing Deck Puzzles, where we post a new puzzle each day.