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Some tournaments are run using basic checkers rules, referred to as Go As You Please, GAYP, or freestyle. Others follow the 3-move rules, which limit players' options at the start of the game to a set of three move sequences. (The 3-move rules greatly reduce the possibility of a draw between skilled players.) More recent books will contain up-to-date strategic advances, but this is less important if you're a beginner. Browsing the checkers shelf at a library or bookstore can help you find a book that is helpful and fun to read. Playing against more experienced players who are willing to share their knowledge is a great way to improve your game. Whether that means entering tournaments or finding your local amateur expert, the better your opponents are, the more you'll learn.
Decide which rules of checkers to follow. Study a checkers strategy guide that matches your rules system and skill level. Play against the best opponents you can find.