Discovered Check

      The position below is my own example for 
      Discovered Check teaching, but the actual
      idea for this problem is from a book that
      I do not remember the name of.

White to move

    In this position, wouldn't everybody prefer
    to have the Black pieces?
       Work this problem out for a few moves -

            1.
            2.
            3.
            4.
            5.
            6.

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