1...Kd7 [a] !  1...Kd5 [b] !  1...b4 [c] !

Try: 1.Bf3?   [2.Qc6 [A] ]

But 1...Kd7 [a] !

Try: 1.Be8?  [2.Qc6 [A] ]

But 1...Kd5 [b] ! 

Try: 1.Rg5? 

  1...Kd7 [a]    2.Rd5 [B] 

   But 1...b4 [c] !

Try: 1.Rg8?  [2.Rd8 [C] ]

But 1...Kd7 [a] !

Try: 1.Rg4?  [2.Rd4 [D] ]

But 1...Kd5 [b] !

Try: 1.Rg7? 

1...Kd5 [a]    2.Rd7 [E] 

But 1...b4 [c] ! 

Solution: 1.Rc1  [2.Qc6 [A] ]

1...Kd7 [a]    2.Qc7 [F]

1...Kd5 [b]    2.Qc5 [G]

1...b4    [c]    2.Qc6 [A]

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