(;AB[ap]AB[bp]AB[co]AB[bn]AB[eo]AB[fo]AB[fp]AB[fq]AB[fr]AB[fs]AB[er]AW[es]AW[ds]AW[dr]AW[eq]AW[ep]AW[dp]AW[cp]AW[br]AW[as]C[Black to kill]AP[goproblems]
(;B[cq];W[bq]
(;B[cr];W[cs]
(;B[aq]C[Correct, white can't defend the B1 Eye, because she is short of liberties.RIGHT])
(;B[do];W[dq])
(;B[ar];W[aq]))
(;B[aq];W[cr]
(;B[bs];W[ar])
(;B[ar];W[bs]))
(;B[do];W[dq]
(;B[cr];W[cs])
(;B[cs];W[cr])
(;B[aq];W[ar])))
(;B[bq];W[cq])
(;B[cr];W[cq]
(;B[bq];W[cs])
(;B[do]))
(;B[cs];W[cr])
(;B[bs];W[cs]
(;B[cq];W[bq];B[aq];W[ar])
(;B[bq];W[cq]))
(;B[aq];W[cq])
(;B[do];W[cq])
(;B[dq];W[cq]))