Foldit offers two levels of puzzles that are played for points. New players who have completed intro puzzles can play beginner puzzles, and all players can play regular, non-beginner puzzles, which are marked as "intermediate" or "advanced". (See gameplay for more on the ins-and-outs of playing Foldit.) There are several types of non-beginner Foldit puzzles. Each type of puzzle has different scientific goals and calls for different strategies. As of January 2017, the most common types of Foldit puzzles are: There are also several types of Foldit puzzle seen in the past: