- ➊ Blacken some cells of the diagram [paper] resp. color the
gray cells of the diagram black or white [interactively].
- ➋ The black cells divide the diagram into "L"-formed areas of
orthogonally contiguous white cells. The two legs of an L must be exactly
one cell wide.
- ➌ The white areas must not touch each other
- ➍ Cells with circles and arrows are always white.
- ➎ A circle indicates a cell in which an L must bend (not all
cells in which an L bends are marked by an circle).
- ➏ A number in a circle indicates the number of cells in this
- ➐ An arrow marks the end of an L-leg; the arrow points to the
cell in which the L bends.
- ➑ The black cells must not cover an area of 2x2 cells or
larger and must form an
orthogonally contiguous area.