Logic Masters Deutschland e.V.

Hello.

Normal sudoku rules apply.

Yin–Yang shading:

Color each cell either green or red such that:
Each color forms a single orthogonally connected region.
No 2×2 block of cells is entirely one color.

A green clue sums red digits.
A red clue sums green digits.
(see example image for clarity.)



For each indicated direction:
Starting from the clue cell, consider a continuous straight-line stretch of cells in that direction.

This stretch must either:
end at a cell of the same color as the clue, or
reach the edge of the grid.

Only digits in cells of the opposite color are counted toward the sum.
Cells of the same color as the clue may appear within the stretch but are not counted.
The counted digits do not need to be adjacent.

At least two digits must be counted.

The sum of the counted digits equals the digit in the clue cell.

If a clue points in two directions, each direction independently sums to the digit in the clue.

Digits separated by a black dot are in a 2:1 ratio.

Have fun.