(;AB[br]AB[dr]AB[dq]AB[dp]AB[cp]AB[bp]AB[ap]AW[aq]AW[cs]AW[ds]AW[er]AW[eq]AW[ep]AW[ao]AW[bo]AW[co]AW[do]AW[en]AP[goproblems]
(;B[bs]
(;W[cr]
(;B[ar]C[Solution given in the Book, but white's best response to 1 is to play 2 at 3.CHOICERIGHT]LB[bs:1]LB[cr:2]LB[ar:3])
(;B[bq];W[ar]
(;B[as];W[es]C[])
(;B[cq];W[as]))
(;B[as];W[bq]C[])
(;B[cq];W[es]
(;B[bq];W[ar]C[])
(;B[ar];W[bq]C[])))
(;W[ar];B[cr];W[bq]C[seki];B[es];W[ds];B[fs]C[There is an error in the solutions http://senseis.xmp.net/?LiChanghoJingjiangWeiqiSihuo/Errata]LB[bs:1]LB[cr:2]LB[ar:3];W[gr];B[gs];W[hs];B[cs];W[fr];B[ds];W[hr]C[This solution is much worse for white. Black has 3 points from prisoners, and white is reduced by at least 6 points.]))
(;B[cr];W[bs]
(;B[bq];W[ar];B[as];W[ar]C[])
(;B[ar];W[bq];B[as];W[cq])
(;B[as];W[ar];B[bq];W[cq]))
(;B[ar];W[bs]
(;B[cr];W[bq];B[as];W[cq])
(;B[cq];W[cr];B[bq];W[es]C[])
(;B[bq];W[cr];B[as];W[es]C[])
(;B[as];W[es]
(;B[bq];W[cr])
(;B[cr];W[bq]C[])
(;B[cq];W[cr]C[])))
(;B[bq];W[bs]
(;B[ar];W[cr]C[];B[as];W[es]C[])
(;B[cr];W[ar];B[as];W[ar]C[]))
(;B[as];W[bs];B[ar];W[cr]C[];B[bq];W[es])
(;B[cq];W[bs];B[as];W[ar]))