Dominoes meet Sudoku.

• Cover every cell with dominoes (each covers 2 adjacent cells).
• The grid is divided into colored regions with constraints.
• =N — pip values in the region sum to N.
• = — all pips in the region are equal.
• ≠ — all pips are different.
• <N / >N — pip total is less/more than N.

You’re given a fixed set of domino tiles (each half shows a pip value, 0–6). Select a tile from the tray, tap its first cell, then tap an adjacent cell to place it. Every tile must be used and the whole shape covered. Tap a placed domino to return it to the tray.

Start with the most constrained regions — small regions with exact-sum constraints have very few valid pip combinations.