Logic Masters Deutschland e.V.

Rules:

Fill the grid with the digits 1-7 such that every row and column contains exactly three 3s and one of every other digit.
Fill each box with up to 3 unique digits.

Digits along a slow thermometer never decrease moving from bulb to tip.

White dots separate consecutive digits.
Black dots separate digits when one digit is double the other.

Play on SudokuPad

Have fun solving!