Logic Masters Deutschland e.V.

Rules

1. Base
Normal Sudoku rules apply.

2. Kropki Dots
Cells joined by a white dot contain consecutive digits.

Cells joined by a black dot contain digits where one is double the other.

Not all white and black dots are necessarily given.

More Kropki Sudoku puzzles
This puzzle appears as puzzle #58 in my book 128 Handcrafted Kropki Sudoku. If you enjoyed solving it, you'll find 127 more handcrafted Kropki puzzles in the full volume, ranging from beginner-friendly introductions to expert-level challenges.

Discover the series
128 Handcrafted Sudoku Variants is an ongoing series where each volume explores a new Sudoku variant. Every book gradually progresses from easy 4×4 puzzles to expert 9×9 challenges, making the series suitable for both newcomers and experienced solvers.