#127 - Kropki Akari

     Place lights in some cells so that every cell is illuminated. Lights illuminate the cell they’re in as well as all cells seen in a straight line horizontally or vertically, not obstructed by a black cell. Lights may not illuminate each other. Each black cell is assigned a number, which represents how many lights are in the (up to) four surrounding cells. All pairs of orthogonally adjacent black cells assigned a number that's double the other are marked with a black dot. All pairs of orthogonally adjacent black cells assigned consecutive numbers are marked with a white dot. A 1 next to a 2 may be marked with either dot.

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