White to play and move a piece to the a1 square in one move.
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Puzzle #7:
White to play and defend an unprotected and attacked piece in one move.
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Puzzle #8:
White to play and move an unprotected and attacked piece out of Black's threat in one move.
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Puzzle #9:
Oh no! White is in check and Black forks White's king and White's bishop! What move does White need to play to make sure Black can't capture his bishop on the next move?