(;AB[cq]AB[bq]AB[dr]AB[er]AB[eq]AB[fr]AB[es]AW[bp]AW[cp]AW[dp]AW[dq]AW[ep]AW[fp]AW[fq]AW[iq]AW[kr]AW[jq]AW[hq]AW[br]TR[br]C[w has just played b2. How can black live?]AP[goproblems]
(;B[cr];W[aq]
(;B[ar];W[as]
(;B[bs];W[cs];B[ds];W[ap])
(;B[cs];W[ap]
(;B[gr]C[RIGHT])
(;B[bs]C[];W[ar];B[gr]C[alive but u have lost a ko threat in b1];W[gs];B[hr];W[hs]
(;B[is];W[ir];B[fs];W[hs])
(;B[ir];W[is];B[js]))))
(;B[cs];W[gr];B[ar];W[as];B[bs]C[RIGHT])
(;B[gr];W[cs]
(;B[ar];W[as];B[ds];W[ar])
(;B[ds];W[ar]))
(;B[hr];W[gr])
(;B[bs];W[ar]
(;B[cs];W[gr])
(;B[gr];W[cs])))
(;B[aq];W[cr])
(;B[ar];W[cr])
(;B[bs];W[cr]))
