Logic Masters Deutschland e.V.

This puzzle has been constructed as a preparation puzzle for this year's German Sudoku Championship.

Rules: Put a number in each cell, such that in every row, column and area, the numbers from 1 to 9 appear exactly once. Black dots indicate that one of the numbers is twice the other one. All possible black dots are given. On horizontal grey lines, there are only odd numbers and on vertical grey lines, there are only even numbers. The sums of the numbers at the endpoints for each triangle have to be assigned to the triangles and are: 17, 18, 19, 19, 20, 21, 21, 22 and 24.