Logic Masters Deutschland e.V.

Solve in SudokuPad

Rules

• Standard sudoku rules apply: Fill the grid with digits 1-9 so that no digit repeats in any row, column or 3×3 box.

There is a negative constraint in this puzzle.

• X sums: an X connects two digits that sum to 10. All Xs are given.

• Unique Lines: Along any line, digits must not repeat.
• Modular Lines: Along a teal line, any three adjacent digits must include one digit from each of the modulo‑3 sets {1,4,7}, {2,5,8}, and {3,6,9}.
• Parity Lines: Along a red line, digits must alternate between odd and even.
• Black Dots: A black dot connects two digits where one is exactly double the other. Not all dots are necessarily given.

Walkthrough video

Other Puzzles

If you enjoyed this, feel free to check out some of my other puzzles:

• Prequel 6x6: a little divided >:(
• Series: Mostly Harmless
• Snack Pack: a little time off B-)
• Series: Stupid Cupid
• Other recent releases:
  • Iguana vs Snakes
  • Division in the Pocket Dimension
  • Rorschach: I choose you!
  • Rorschach: Rorschach: ǝq oʇ ʇou ɹo ǝq oʇ
  • Snow Dragon vs Fire Dragon
• Series: In the Knight Time
  1. One Hot Black Knight
  2. Five Consecutive Knight Straight
  3. Cross Whispers in the Knight
  4. Knights of the Round Times Table
  5. Party 5:15 to Knight