Nim is a mathematical game of strategy in which two players take turns removing objects from distinct heaps or rows. On each turn, a player must remove at least one object, and may remove any number of objects provided they all come from the same heap or row. The help section provides you with the mathematics behind the game and a strategy that will guarantee that you will win the game if you let your opponent start first, and most likely, if your opponent does not know the strategy, you will likely be able to put yourself in a winning position fairly quickly even if you start first.