Chess Puzzle - Series 3477

                          Black to move. How should black proceed ?

Endgame Tactics By gmknockout

(  Q + R + B + 5P+ K vs Q + R + B + 7P + K )

 

GM_Knockout said ;

1. ...Bxd4+!!
2. exd4 Qxd4+!
3. Kc2 Qc3+
4. Kb1 Rxa1#

OR

1. ...Bxd4+!!
2. Kb3 Rxa1
3. exd4 Qxd4
4. Qb2 Rb1!
5. Qxb1 Qc3+
6. Ka2 Qa3#

- Black won 0-1