Logic Masters Deutschland e.V.

Permaculture: Divide the grid into two orthogonally connected areas. One of each areas must fulfill the rules of one of two puzzle genres.

Ice Walk: Draw a loop that goes through every clued cell. Two perpendicular line segments may intersect each other only on icy cells, but the loop may not branch or otherwise overlap. The loop may not turn on icy cells. A clue indicates how many cells make up the continuos non-icy section of the loop that the clue is on. A clue containing several numbers is equal to their sum.

Lohkous: Draw some lines along the edges of cells to divide the grid into several regions. Each region must contain exactly one clue. All lines must divide two regions, there can not be any dead-ends. When dividing a region into horizontal, continuos segments, each segment must have a length specified by one of the clue numbers. The same applies when dividing the region into vertical segments. Each number must be represented at least once by a horizontal or vertical segment in the same region. Icy cells are purely cosmetic.
You can find a more detailed explanation of this genre here.

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