Puzzle rules
Hitori / Singles
Shade cells so no number repeats among the unshaded cells of any row or column. Shaded cells cannot share an edge, and all unshaded cells must remain connected horizontally and vertically.
How to solve
Complete rules
Goal: Remove all row and column duplicates by shading cells. Rules: - After shading, no number may appear more than once among the unshaded cells of any row or column. - Shaded cells hide their numbers. - Shaded cells cannot share an edge. - All unshaded cells must form one orthogonally connected area.