Logic Masters Deutschland e.V.

solve in Penpa+

U-Bahn: Draw an orthogonally connected loop network between the centres of some cells in the bottom right grid. The loop may branch and cross itself but there must be no dead ends.
Numbers in cells outside the grid give the number of corners, straights, branches and intersections in that row or column.

Battenberg: Whenever any 2x2 group of cells contains the same shape in both cells of one diagonal and a different shape in both cells of the other diagonal, a Battenberg symbol is included.
All possible Battenberg clues are given.
Shapes are considered the same irrespective of rotation. An empty cell (not visited by the loop) should be treated as a fifth possible shape.