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ChessProb is a website where chess problems have to be resolved within a required time . The collection has 10 levels of difficulty ranging from novice to fiendish . To move click on a piece first - it will be highlighted - then click on the target field - move will be executed. To undo your piece selection click again. Keep attention, problem may move once again !. New chess problems coming soon. Choose the chessboard: LargeAverageLargeLarge Green Erreur de connexion à la base. Veuillez réessayer dans quelques instants.