Logic Masters Deutschland e.V.

By Stephyonike

Solve on SudokuPad

Sudoku: Normal sudoku rules apply. Place the digits 1 through 9 once each in every row, column, and 3x3 box.

Kropki Dots: Digits separated by a white kropki dot are consecutive. Not all dots are given.

Sandwich Sums: Numbers outside the grid are sandwich sums. Sandwich sums indicate the sum of the digits between the 1 and 9 in their respective row or column.

Sum Difference Lines: Circles on a red sum difference line split that line into segments where the circled digit is the difference between the sums of its two adjacent segments' digits. For clarity, if a segment is of length one, its sum is just the value of the digit on that segment.

Example:

1-2-(7)-6-4 is a valid line because 1+2=3, 6+4=10, and the difference between 3 and 10 is 7.

1-2-(7)-6-4-(3)-8-5 is an extended version of the first example and is also a valid line. The 1-2 and 6-4 segments are connected by a 7, and the 6-4 and 8-5 segments are connected by a 3.