In this game you have to surround a tiger between dark tiles. It can only stand on the light-coloured tiles. You can darken the light tiles by clicking on them, until the tiger's completely surrounded by darker tiles, and can't move in any direction. Beware though: the tiger can also escape when you chase it too far, out of the grid. The less tiles you darken, the more bonuses you get!
Click on the tiles you want to darken.