Endgame Puzzle - Series 263

                           

( Q + R + B + 4P + K +  vs Q + R + B + 5P + K )

Black to move

GM_Knockout said ;

1. ...R8c6!!
   
2. Qxa7 Rb6+!
3. Qxb6 Qxb2+
4. Ka4 Qxb6

OR

1. ...R8c6!!
2. Qxa7 Rb6+!
3. Ka4 Qc6+
4. Ka5 Rb7
5. Qa8+ Kg7 
6. Qa5 Qc7+
7. Ka4 Ra7

OR

1. ...R8c6!!
2. Qa5 Rb6+!
3. Ka4 Qc6+
4. Qb5 Rxb5
5. cxb5 Qxh1

OR

1. ...R8c6!!
2. Kb7 Rb6+!
3. Qxb6 axb6

- White resigned 0-1