(;GM[1] FF[4] AP[Hibiscus:2.1] SZ[19] ST[3] ;C[Warning seriously difficult problem! Black to kill.] PL[B] AB[lb][mc][me][ne][ob][oc][og][pj][qe][qh][qi][rf][rg] AW[nf][ng][oa][od][pb][pd][ph][pi][qg][rd][re] (;B[pc] MN[1] (;W[qc] ;B[rb] ;W[qb] C[Please play at A] LB[qb:5][sb:A](;B[sb] ;W[se] ;B[sc] ;W[pa] ;B[ra] ;W[pf] LB[pf:10][qf:A];B[qf] ;W[qd] LB[qd:12][of:A];B[of] ;W[pg] ;B[pe] ;W[oe] ;B[oh] ;W[oi] ;B[nh] ;W[oj] (;B[nj] ;W[pk] (;B[rk] ;W[ni] ;B[mh] ;W[rl] LB[rl:26][ri:A];B[ri] ;W[qk] ;B[rj] ;W[sg] ;B[ql] ;W[pl] ;B[qm] ;W[rm] ;B[pm] ;W[qn] ;B[ok] ;W[mi] ;B[ol] C[RIGHT] )(;B[qj] ;W[ni] ;B[mh] ;W[qk] ;B[rk] ;W[rl] (;B[sj] ;W[rh] ;B[ri] ;W[sh] ;B[si] ;W[sl] ;B[ok] ;W[mi] ;B[ql] ;W[pl] ;B[qm] ;W[sk] ;B[sg] ;W[rh] )(;B[sk] ;W[rj] ;B[ri] ;W[sg] ;B[sj] ;W[sf] ;B[rh] ;W[sh] )))(;B[mh] ;W[pk] (;B[rk] ;W[rl] (;B[ri] ;W[qk] ;B[rj] ;W[sg] ;B[rm] ;W[ql] ;B[sl] ;W[sf] ;B[rh] ;W[qn] ;B[rn] ;W[qo] ;B[ro] ;W[rp] ;B[qp] ;W[rq] ;B[qm] ;W[pm] ;B[pn] ;W[po] ;B[on] ;W[om] ;B[qq] ;W[qr] ;B[oo] ;W[pp] ;B[pq] ;W[op] ;B[pr] ;W[np] ;B[rr] ;W[sm] ;B[sn] ;W[sk] ;B[sj] ;W[sh] ;B[sq] ;W[qj] )(;B[qj] ;W[qk] ;B[sk] ;W[rj] ;B[ri] ;W[sg] ;B[rh] ;W[sf] ;B[sj] ;W[sh] ))(;B[qj] C[Please choose navigate to find out why this is wrong.] )))(;B[ra] LB[ra:6][sb:A]C[This is equivalent to Black A] ;W[se] ;B[sc] ;W[sb] ;B[pa] ;W[rc] ;B[sa] ))(;W[qd] ;B[pf] ;W[qc] ;B[rb] C[White is dead.] ))(;B[qc] ;W[qd] ;B[pc] ;W[of] ;B[oe] ;W[pe] ;B[pf] ;W[qf] ))