Took a minute to figure out what was going on. Basically a chess puzzle where you get to cheat. You move your king around to anywhere that does not place you in check. You can push your pieces around by running into them. This means they don't move like they would in a normal game. In one puzzle, I pushed a black square bishop onto a white square and the game suddenly changes. The goal is to place the enemy in checkmate and press enter. If you like chess puzzles, then you'll probably like this. The criticism I would give at this point is that it needs better instructions (I almost gave up before I figured out what I was supposed to do), and the pieces need some better definition/contrast with the board.