Back
Nanro Signpost (Yin-Yang) (1010)
Instruction:
Label some cells with numbers such that each bold region contains at least one labeled cell. Each number (including any given numbers) must equal the total count of labeled cells in that region; for some regions, that number is given to you in the upper-left cell of the region (but not which cells are labeled). When two labeled cells from different regions are connected orthogonally, they must contain different numbers. All labeled cells are connected orthogonally. No 2×2 group of cells can be entirely labeled.
All unlabeled cells are connected orthogonally. No 2×2 group of cells can be entirely unlabeled. Some unlabeled cells may be given to you (marked with an X in the grid).