Fill the triangles in the grid with the numbers 1-9 so that there are no duplicates in any large triangular region or along any stripe of cells, even those that skip over the middle.

Connect each pair of numbers in the grid. Lines travel orthogonally through cells, and may not cover a 2×2 area.

Shade cells in each region equal to the number given. If a region has no number, it may have any number of shaded cells, including zero. The remaining unshaded cells must form a single orthogonally contiguous area.

Find all 28 dominoes in a double-six set (0-0 through 6-6) in the grid. Mark each pairing off as individual dominoes. All pair possibilities are used, and no domino is used more than once.

Place light bulbs in the grid in such a way to illuminate all of the unlit cells in the grid, using number clues and walls. Numbers on the walls indicate how many bulbs are placed orthogonally adjacent to them. Walls also block light.