A grid-based logic puzzle
Color each cell black or white… and give your brain a workout.
Get Some Puzzles
Implication (→)
An arrow from one cell to another means: if the source cell takes the arrow’s colour, the target cell must also take that colour. The contrapositive also holds: if the target is a different colour, the source cannot take the arrow’s colour.
The arrow’s colour tells you which colour is implied.