The grid is divided into regions. Shade exactly two squares in each one.
Every shaded square must touch exactly one other shaded square, so the shading is made of dominoes. A domino may lie inside one region or straddle two — and two dominoes may meet at a corner but never along a side.
Small regions are the place to start: a region of two squares is a whole domino, and a region of three in a line has only two ways.
Shade exactly two squares in every region so the shaded squares form dominoes that never touch side to side.
The full guide, with a worked example and common mistakes: How to play Domino Shade.
Yes — each square still counts for its own region.
Yes, at corners only.
Yes — every puzzle here is checked to have exactly one solution.
Open the Domino Shade Solver, draw the regions and press Solve.