Tactic
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Hello! Today there is something incomprehensible. The problem is this - I have the right to decide on the day of 25 tasks on tactics. Before that, everything was fine, but now is a time that you begin to solve the problem, do the two of true progress, trying to make moves on, and the position returns to the initial position.Even when he tried to repeat the course of the computer opposite figures, which is the first to pop up a message that the problem is solved properly. Sometimes if someone is a problem? How to solve it, tell me please.