Logic Masters Deutschland e.V.

Normal sudoku rules apply.

Black Kropki pairs: Digits separated by a black dot have a 2 to 1 ratio. Not all dots are necessarily given.

Palindrome: The single gray line is a palindrome. It's digits read the same forwards and backwards.

Region Sum Lines: Blue lines in the grid are Region Sum Lines. Box borders divide each blue line into segments with the same sum. Different lines may have different sums.

Entropic Lines: The salmon colored lines in the grid are entropic lines. Any set of three sequential cells along an entropic line must contain a low digit (1-3), middle digit (4-6) and high digit (7-9). Digits may repeat on a line, if allowed by other rules.

Have fun, leave a comment if you enjoy the puzzle!

Play this puzzle on SudokuPad

PS: I stream solving sudoku like puzzles two days a week, as well as posting Let's Plays of puzzle games like Blue Prince. You can check out the channel, as well as some videos I have made about setting puzzles, at my YouTube channel here.