Coloured Akari is a variant of Akari, in which the cells in a grid are split into either shaded or unshaded.
The objective is to light up all white cells, subject to the following rules:
- Lightbulbs are either blue, red or yellow.
- Lightbulbs shine every cell vertically and horizontally until they reach a coloured cell or the boundary.
- Numbers in some cells denote the number of lightbulbs in adjacent cells.
- Lightbulbs themselves are not lit by other lightbulbs.
- Beams of the same colour may not cross, beams of different colours may cross.
- The colours of cells denote the colour of the bulbs in vertically and horizontally cells. Blue, red and yellow cells only have bulbs of their co-responding colours only.
- Other colours have lightbulbs of at least two colours in vertically and horizontally cells as follows; purple - blue and red, green - blue and yellow, orange - red and yellow, brown - blue, red and yellow. Black cells are considered wild.
A standard 10x10 coloured akari and its solution.