Logic Masters Deutschland e.V.

Normal sudoku rules apply. Kropki: digits separated by a white dot are consecutive; digits separated by a black dot are in an 1:2 ratio (i.e. one digit is double the other). XV: digits separated by an X must sum to 10; digits separated by a V must sum to 5. Thermometer: digits on a thermometer must strictly increase from the bulb to the tip. Arrows: the digits along the arrow must sum to the number in the circled cells. Quadruplets: every digit in a circle must be assigned to one of the four surrounding cells.

Solve online here:

SudokuPad Puzzle

If you like this puzzle you may enjoy some of my other puzzles too, click HERE to see the other puzzles I have made.