Chess problems and puzzles usually contain preset positions on the board, with information about which side goes next and how many moves they have until a certain result should be attained. The goal of them is to force a certain result, such as a win or draw.
Please submit only sites dealing with chess problems or puzzles to this category. More general chess sites should be listed under Games: Board_Games: Genres: Abstract_Strategy: Battle_Games: Chess, and other types of chess sites should be listed under the appropriate subcategory.