(;C[Black to play]AB[ss]AB[rr]AB[qr]AB[qs]AB[or]AB[op]AB[po]AB[ro]AB[rn]AB[mp]AB[mo]AW[sp]AW[rp]AW[qp]AW[qq]AW[pq]AW[nr]AW[nq]AW[os]AB[lr]AP[goproblems]
(;B[oq];W[pr]
(;B[ps]
(;W[ns]C[CHOICE]
(;B[sr];W[rq]
(;B[rs];W[sq]
(;B[rs];W[rr];B[qs];W[ss]LB[sr:Ko?])
(;B[rr];W[rs];B[sr];W[qr];B[ps]C[RIGHT])
(;B[ps];W[rs]
(;B[qs];W[qr]
(;B[sr];W[ps])
(;B[ps];W[sr]))
(;B[sr];W[rr];B[qs];W[qr];B[ps]C[RIGHT]))
(;B[qs];W[rs]
(;B[rr];W[sr]LB[ss:Ko?])
(;B[ps];W[qr]
(;B[sr];W[ps])
(;B[ps];W[sr]))
(;B[qr];W[rr])))
(;B[so];W[sq];B[pp];W[rs]
(;B[ps];W[qs];B[sr];W[rr])
(;B[sr];W[rr];B[ps];W[qs])))
(;B[rs];W[sr];B[sq];W[rq])
(;B[sq];W[rq]
(;B[np];W[sr])
(;B[mq];W[sr])
(;B[mr];W[sr])
(;B[ms];W[sr])
(;B[pp];W[sr])
(;B[qo];W[sr])
(;B[so];W[sr]))
(;B[rq];W[sq])
(;B[pp];W[sr]
(;B[qo];W[rs])
(;B[so];W[rs])
(;B[rq];W[sq]))
(;B[qo];W[sr]
(;B[so];W[rs])
(;B[rq];W[sq])
(;B[sq];W[rq];B[so];W[sr])
(;B[pp];W[rs]))
(;B[so];W[sr]
(;B[sq];W[rq]
(;B[qo];W[sr])
(;B[sr];W[rs]))
(;B[qo];W[rs])
(;B[pp];W[rs])
(;B[rq];W[sq])))
(;W[sr];B[rq]
(;W[sq];B[ns];W[rs];B[os]C[RIGHT])
(;W[ns];B[sq])))
(;B[sr];W[ps];B[ms];W[ns];B[mr];W[rq];B[pp];W[sq];B[qo];W[rs]))
(;B[pr];W[oq]
(;B[sr];W[rq];B[pp];W[sq];B[so];W[ns];B[np];W[ps])
(;B[pp];W[sq];B[sr];W[rq];B[qo];W[ns];B[np];W[ps]))
(;B[ps]))
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