Logic Masters Deutschland e.V.

Shade some empty cells so that the following criteria are met:

• All unshaded cells form a single orthonally connected area
• all orthogonally connected regions of shaded cells are adjacent to the edge of the grid
• no 2x2 area is completely shaded

Two cells see each other if and only if they are in the same row or column and there are no shaded cells between them.

The red circles are dragons.

• Each dragon has an egg (a white circle), which must be placed in an empty unshaded cell.
• The cell immediately below an egg must always be shaded.
• Each dragon can see its own egg.
• Dragons may not see each other or each other's eggs.

Unshaded cells that are adjacent to the edge of the grid are entrances.

• There must be exactly as many entrances as there are dragons.
• Entrances may not touch each other orthogonally.
• Neither dragons nor eggs may be visible from an entrance.
• Birds (the white rhombuses) must be visible from at least one entrance.
• Bats (the black rhombuses) must not be visible from any entrance.

Some clarifications:

• Eggs may touch or see each other.
• Dragons, eggs, birds and bats do not block vision.

Two example puzzles: (penpa+ example 1 example 2)