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Unlimited Chess Puzzles. Supporters get unlimited access to the problems in the database. Train your tactical ability, exercise your calculating skills and candidate moves evaluation. Save computer played games. As a supporter you will have the possibility to save your played games to analyze and download them. When annotating chess games, commentators frequently use widely recognized annotation symbols. Question marks and exclamation points that denote a move as bad or good are ubiquitous in chess literature. Some publications intended for an international audience, such as the Chess Informant, have a wide range of additional symbols that transcend language barriers.
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