Logic Masters Deutschland e.V.

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Rules:

The puzzle consists of thirteen 10x10 grids. Each grid follows the standard rules for a particular shading puzzle genre. Nine grids contain regions, and these grids overlap with four grids that do not contain regions. Where two grids overlap, rules for both genres apply, and this area constitutes a 4x4 region for any grid with regions.

(Clarification: the rules listed below only apply to that 10x10 grid. For example, a cave clue does not see unshaded cells beyond the cave grid’s border. And, there can be a fourth shaded cell outside the aqre border connected to a line of three shaded cells inside the aqre grid.)

The thirteen grids are as follows:

Heyawake

- Shaded cells are not horizontally nor vertically adjacent.

- A number indicates the amount of shaded cells in that region.

- Unshaded cells form an orthogonally connected area.

- There cannot be a horizontal or vertical line of unshaded cells that goes through two or more region borders.

Aqre

- A number indicates the amount of shaded cells in that region.

- Shaded cells form an orthogonally connected area.

- There cannot be a horizontal or vertical line of more than three consecutive shaded or unshaded cells.

LITS

- Every region contains four shaded cells that are orthogonally connected (i.e. tetrominoes).

- Shaded cells form an orthogonally connected area.

- Shaded cells cannot form a 2x2 square.

- Two identical tetrominoes, including rotations and reflections, cannot share an edge.

Cave

- Shaded cells are orthogonally connected to the edge of the grid.

- A number is unshaded and indicates how many unshaded cells can be seen in a straight line vertically or horizontally, including itself.

- Unshaded cells form an orthogonally connected area.

Canal

- A number is unshaded and indicates how many total cells are shaded in continuous lines starting from the cell. These lines are in the four cardinal directions (up, down, left, right).

- Shaded cells form an orthogonally connected area.

- Shaded cells cannot form a 2x2 square.

Cocktail

- Each region contains at most one block (i.e. an orthogonally connected group of shaded cells).

- A number indicates the amount of shaded cells in that region.

- Shaded cells cannot form a 2x2 square.

- Shaded cells cannot be adjacent across region borders.

- Blocks form a diagonally contiguous area.

Chocona

- Each block (i.e. an orthogonally connected group of shaded cells) must be a filled rectangle or square.

- A number indicates the amount of shaded cells in that region.

Nori Nori

- Each shaded cell is orthogonally adjacent to exactly one other shaded cell.

- Each region contains exactly two shaded cells.

Nurikabe

- A number is unshaded and indicates how unshaded cells are part of that group (i.e. an orthogonally connected group of unshaded cells). Each group contains exactly one number.

- Shaded cells form an orthogonally connected area.

- Shaded cells cannot form a 2x2 square.

Chocolate Banana

- An orthogonally connected group of shaded cells must be a filled rectangle or square.

- An orthogonally connected group of unshaded cells must not be a filled rectangle or square.

- A number indicates the size of the (shaded or unshaded) group that contains it. A group can contain zero, one, or more than one number.

Shimaguni

- Each region contains exactly one block (i.e. an orthogonally connected group of shaded cells).

- A number indicates the amount of shaded cells in that region.

- Shaded cells cannot be adjacent across region borders.

- Two regions sharing a border must have blocks of different sizes.

Stostone

- Each region contains exactly one block (i.e. an orthogonally connected group of shaded cells).

- A number indicates the amount of shaded cells in that region.

- Shaded cells cannot be adjacent across region borders.

- If all of the blocks were to fall down, they must completely fill the bottom half of the grid.

Hinge

- Each block (i.e. an orthogonally connected group of shaded cells) is cut exactly once by a single straight segment of region borders, across which it must have reflectional symmetry.

- A number indicates the amount of shaded cells in that region.