出典:Wikipedia
出典:『Wikipedia』 (2010/02/23 03:26 UTC 版)
The "Instant Insanity" puzzle consists of four cubes with faces colored with four colors (red, blue, green, and white commonly). The object of the puzzle is to stack these cubes in a column so that each side (front, back, left, and right) of the stack shows each of the four colors. The distribution of colors on each cube is unique.