(;AB[bs]AB[aq]AB[bq]AB[cr]AB[cq]AW[cs]AW[dr]AW[ds]AW[es]AB[eq]AB[dq]AB[er]AW[bp]AW[cp]AW[co]AW[cn]AW[ao]AB[dp]AB[do]AB[dn]AB[ep]AB[fp]AB[fo]AB[en]AB[em]AW[fn]AW[fm]AW[fl]AW[el]AW[dm]AW[dl]AW[fr]AW[fq]AW[fs]AW[gs]AW[gp]AB[go]AB[ho]AB[io]AW[hp]AW[ip]AW[iq]AW[jq]AB[jp]AB[kq]AW[jr]AW[kr]AB[lr]AB[ls]AB[ks]AB[lp]AW[js]AW[cl]AW[ck]AB[ap]AB[jo]AB[kp]AB[lq]C[Black to get the the best result]AP[goproblems]
(;B[hr];W[hs]
(;B[ir];W[gr];B[hq]C[CHOICE])
(;B[is];W[ir];B[gq]C[black sacrifice isn't nessesaryCHOICE])
(;B[gq];W[ir]C[nice seki and senteCHOICERIGHT])
(;B[gr];W[ir]C[CHOICE])
(;B[hq];W[ir]))
(;B[hs];W[hr]C[CHOICE])
(;B[gr];W[hr]C[CHOICE])
(;B[gq];W[hr]C[CHOICE])
(;B[hq];W[hr]C[CHOICE])
(;B[ir];W[hr]C[CHOICE])
(;B[is];W[hr]C[CHOICE]))