A rook is a piece which can move as many squares as are unimpeded by either an opponent's or the player's own pieces along a file or rank. Each player has two rooks which are placed at opposite ends...
There are several situations: Automatic, Agreed upon, Claimed and upheld, Stalemate
1. Automatic Draw: a) If the pieces left are king against king; king against king with only a bishop or knight; or...