Logic Masters Deutschland e.V.

In the grid, there are black small triangles in four directions. Each identical small triangle represents a positive integer, and different black triangles represent different numbers. If there are multiple black triangles in a grid, it indicates the sum of their numbers. There are two shaded areas in the figure, referred to as "twins", where the numbers in the same position are exactly the same. In the grid where the three vertices of the red large triangle in the figure are located, there are at least two equal numbers. The sum of the numbers along each arrow is equal to the number in the cell with a circle, and the numbers can be repeated within the shape of the arrow. Other rules are the same as those for standard Sudoku. Each row, column, and bold 9-square grid must contain numbers from 1 to 9 without repetition.