Black to move and win
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Black to move and win,
you said? It took me 5 moves to checkmate.
But it was good.
1...Re1+ is the key to checkmate the white king,because the white is forced to trade his rook and so rank 1 stays unguarded
If the black plays 4.Rxb4 then the white 4...Qd2#. When the bishop takes the black knight checkmate is just delayed for 1 move.
Very good puzzle!
