(;AW[qq]AW[pq]AW[oq]AW[nq]AB[lr]AB[mq]AB[mp]AB[kq]AB[np]AB[pp]AB[op]AB[qp]AB[qc]AB[pc]AB[oc]AB[nc]AW[qn]AW[qk]AB[qf]AB[qi]AW[qd]AW[pd]AW[od]AW[nd]AW[md]AW[mc]AW[lb]AW[kc]AW[ok]AW[on]AB[of]C[Kill on the bottom if you can. If it is alive unconditionally then play A (p11) and defend yourself on top.]LB[oi:A]AW[qm]AB[qg]AW[so]AB[se]AB[rn]AB[rm]AW[ql]AB[qh]AW[rf]AW[rg]AB[ri]AW[rk]AP[goproblems]
(;B[oi];W[rc]
(;B[rb];W[rd]
(;B[sb];W[pa]
(;B[nb];W[na]
(;B[ma];W[oa]
(;B[mb];W[qb]
(;B[ra];W[sc]
(;B[pb];W[la];B[qa]C[Correct!RIGHT])
(;B[qa];W[sa]))
(;B[pb];W[ra]C[ko]))
(;B[qa];W[mb]))
(;B[oa];W[ma];B[pb];W[ob]C[ko])
(;B[qa];W[oa];B[ma];W[mb]))
(;B[na]C[See problem 12334.])
(;B[ob];W[oa];B[na];W[ma];B[nb];W[qb])
(;B[oa];W[na]
(;B[nb];W[ma];B[pb];W[ob]C[ko])
(;B[ob];W[qb])))
(;B[sc];W[nb]
(;B[qa];W[oa]
(;B[pa];W[pb])
(;B[ob];W[pa]))
(;B[ob];W[sb];B[sa];W[qa])
(;B[sb];W[ob])
(;B[pa];W[ob];B[pb];W[sb]))
(;B[nb];W[sb]
(;B[ra];W[na]
(;B[oa];W[pb])
(;B[pa];W[qb]
(;B[pb];W[oa])
(;B[oa];W[pb]))
(;B[ma];W[mb]
(;B[pa];W[qb]
(;B[oa];W[pb])
(;B[pb];W[oa]))
(;B[pb];W[oa])
(;B[oa];W[pb])))
(;B[pb];W[qa]
(;B[ra];W[oa]
(;B[na];W[pa])
(;B[pa];W[na]))
(;B[pa];W[ra]))))
(;B[rd]C[NOTTHIS];W[re];B[rb];W[sd];B[sb]))
(;B[rq]
(;W[rr];B[rp];W[sr]
(;B[ps];W[nr];B[ns];W[ms];B[os];W[mr];B[qr];W[rs]
(;B[ls];W[qs])
(;B[sq];W[pr]))
(;B[nr];W[ps]
(;B[os];W[or])
(;B[or];W[pr])
(;B[rs];W[qs])
(;B[qr];W[pr])
(;B[qs];W[or]))
(;B[ns];W[ps])
(;B[os];W[ps]
(;B[qs];W[ns];B[pr];W[qr];B[nr];W[or];B[ms];W[rs])
(;B[pr];W[qr];B[qs];W[or]
(;B[ns];W[rs];B[ps];W[ms])
(;B[nr];W[rs])
(;B[rs];W[ns])))
(;B[rs];W[nr]
(;B[qr];W[pr])
(;B[ps];W[qr])))
(;W[rp];B[ro];W[rr];B[sp];W[sr]))
(;B[nr];W[rp];B[ro];W[rq];B[qo];W[or])
(;B[rp];W[rq];B[nr];W[sp]
(;B[ro];W[or]
(;B[rr];W[qr])
(;B[rs];W[qr];B[ps];W[os])
(;B[qr];W[rr]
(;B[sq];W[qs])
(;B[rs];W[sq];B[ps];W[os]))
(;B[qs];W[ps]
(;B[rs];W[qr])
(;B[qr];W[rr])))
(;B[so];W[sq]
(;B[ro];W[or])
(;B[rn];W[or])
(;B[qo];W[rn];B[ro];W[or]))))