Sun and Moon ("Munraito") is a logic puzzle invented by Naoki Inaba (Japan). A square grid contains planets in some cells. The goal is to place exactly one star and one stardust cloud into each row and each column of the grid. If a particular semicircle of a planet is illuminated, there must be a star in that rank to light it. A star shines horizontally and vertically only; planets and stardust clouds block starlight. brain games for adults - brain teasers riddles - mind puzzle games - mind puzzles for adults - puzzle games for adults - brain busters - math brain teasers - brain teasers and answers - riddles and brain teasers - brain twister - mind teaser puzzles - mind games for adults - funny puzzles - mental puzzles