Logic Masters Deutschland e.V.

Rules:

1. Normal sudoku rules apply.

2. Shade some cells such that all shaded cells are orthogonally connected, all unshaded cells are orthogonally connected, and no 2x2 area is fully shaded or fully unshaded.

3. Along blue lines, digits have an equal sum within each region it passes through. If a line passes through a box multiple times, each individual segment sums separately.

3. Along blue lines, digits have an equal sum within each region it passes through. If a line passes through a box multiple times, each individual segment sums separately.

Furthermore, blue lines are compatible with the yin-yang rules. (Along each blue line, the sum of the digits in shaded cells is the same within each box it passes through. The same is true for unshaded cells.)

Link to CtC

Link to F-Puzzles

Puzzle: