Logic Masters Deutschland e.V.

Today Erica explores the interactions between German whisper lines and region sum lines :-)

This puzzle comes with a standard version which should be around 2*, but if you feel strong, there is also a hardcore version of the same puzzle with the same solution, which was estimated by testers to be 3* :-)

I hope you will enjoy and I would be really grateful for all the comments and ratings.

Normal sudoku rules apply.

A line is dual German whisper and region sum line.

German whisper: Adjacent digits along a green line have a difference of at least 5.

Region sum: Box borders divide a blue line into segments which have the same sum of digits.

Kropki dots: Digits in cells joined by a white dot are consecutive. Digits in cells joined by a black dot are in a 1:2 ratio (i.e., one digit will be double the other). Not all dots are necessarily given.

Choose if you prefer easier or harder version of the puzzle:
★★☆☆☆: SudokuPad Link
★★★☆☆: SudokuPad Link