Stained Glass

Stained Glass is a binary determination logic puzzle published by Nikoli. Rules Stained Glass is played on a field of intersecting vertical, horizontal, and diagonal lines. At the intersections of some of these lines are small circles, either unshaded, grey shaded, or completely darkened. An unshaded circle denotes that there are more unshaded shapes touching that circle than shaded shapes. A grey shaded circle denotes that there are an equal number of shaded and unshaded shapes touching that circle. A completely shaded circle denotes that there are more shaded shapes touching that circle than unshaded shapes.