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Blackout Dominoes (1072)
Instruction:
Shade some cells, label all other cells with numbers, and identify the locations of dominoes such that the diagram contains a full set of dominoes. If two domino halves touch along an edge (and are not part of the same domino), then they must contain the same number. The orientation of the numbers does not matter. A full set of dominoes will be provided for your convenience; the smallest and largest numbers on the dominoes may change from puzzle to puzzle. Shaded cells cannot share any edges with other shaded cells or the outer edge of the diagram. Some cells are already labeled with numbers; these cells cannot be shaded.