Back
Yin-Yang (Equal Regions) (996)
Instruction:
Fill each cell with either a black or a white circle. All cells with black circles must be connected orthogonally, and all cells with white circles must be connected orthogonally. Every 2×2 group of cells must contain at least one black circle and at least one white circle. Some cells are already filled in for you.
The grid is divided into regions; some are shaded in gray. In each gray region, the number of black circles and the number of white circles must be equal. In other regions, the number of black and white circles might or might not be equal.