I take it you set the puzzle up wrong? I also don't see how you got the second position from the first.
An unusual solution to a common tactic
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Black to play and get mated after blundering certainly is an unussual solution to a common tactic.
It all started off with a normal, slightly mad sacrifice:
Black decided to create attacking chances, so he played 8 . . . Bxh3?
And White found a solution that ended everything: