Logic Masters Deutschland e.V.

Permaculture: Divide the grid along the grid lines into two orthogonally connected parts. In each part, solve one of the following two puzzles. The two puzzles are completely independent of each other and do not interact at all.

Tapa: Blacken some empty cells in a way that all black cells are connected horizontally and vertically and no 2x2-field is completely black. The numbers in the cells give hints on how to blacken the surrounding fields (even diagonally): The numbers give the number of directly connected black cells. Each number represents a group of horizontally or vertically adjacent cells; groups around a hint-cell have to be separated by at least one white cell. The order of the numbers is unimportant.

Railroads: Draw a closed loop into the grid that runs horizontally and vertically. The loop must cross itself at the marked cells and pass through each other cell exactly once. The numbers represent stations; there are stations from 1 to N, where N is unknown, each number exactly once. The loop cannot make a turn in a station, and along the loop the stations must be passed in order.

Some clue numbers are Easter eggs and have yet to be found.