The Checker Shadow is an extremely impressive illusion that defies our sens of sight. In this illusion, where context is of great importance, there is an image of a chessboard with black and white squares. One of these squares is identified as square A and the other as square B. Oddly enough, these two squares seem to be of different colors, though this is entirely false. Just look at the animated images above to see for yourself. And click on the link to see the original 1995 image of the Checker Shadow.