Logic Masters Deutschland e.V.

Chaos Construction: Divide the grid into 9 regions, each comprised of 9 orthogonally connected cells. Each row, column, and region must contain the digits 1-9 once each.

Numbered Rooms: Clues outside the grid indicate the value that must be placed in the n-th cell in that direction, where 'n' is the value of the first cell seen. The n-th cell must also be the first cell of a new region, as seen from that direction. This region does not need to be the second region seen (i.e. there may be other regions that are seen before it). A '?' represents any value.

Say What You See: A digit in a caged cell indicates how many cells of its own region can be 'seen' in all orthogonal directions, including itself. Region borders block vision. If a value is provided in the top-left corner of the cage, then the 'seen' cells (including the caged cell) must sum to that total. All possible cages are given.

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