Logic Masters Deutschland e.V.

There are some lines in this puzzle that are different than difference lines… There are some lines in this puzzle… There are sum lines! The natural counterpart to difference lines. Please let me know how you like difference (and sum) lines, and check out my previous puzzles if you’d like more of a primer before jumping in here.

Sudoku: Standard rules apply (place the digits 1 to 9 in every row, column, and 3x3 box; there are even some given digits here!)

Diamond difference lines (thinner, blue lines): The two digits adjacent to a diamond on a line have an absolute difference equal to the digit in the diamond.

Circle sum lines (thicker, pink lines): The two digits adjacent to a circle on a line have a sum equal to the digit in the circle.

Solve this puzzle in SudokuPad.