Logic Masters Deutschland e.V.

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Two versions, based on the same idea, but with different solutions. Version 1 is more solver-friendly; with some clearer logic to eliminate some cases which in Version 2 will require a little visualisation. Play either or both.


FORTRESS FILLOMINO:
• Divide the grid into orthogonally connected regions and fill each cell with a number (not necessarily single-digit) showing the number of cells in the region to which it belongs;
• Each region must be either strictly larger than all of its orthogonal neighbours or strictly smaller than all of its orthogonal neighbours.

DUTCH FLATMATES:
• Every 5 in the grid has a 1 above it or a 9 below it (or both).

RENBAN:
• Digits on a purple line are all different and form a set of consecutive numbers (not necessarily in order).