(;
AW[io][fp][gp][hp][jp][kp][dq][fq][kq][mq][er][hr][ir][lr][gs][hs]
AB[gq][hq][iq][jq][fr][kr][fs][ks]PL[1]C[Black to play and live.
]
(;B[is];W[js]
(;B[gr];W[ls];B[jr];W[es];B[is]C[RIGHT
])
(;B[jr];W[ls]
(;B[gr];W[es];B[is]C[RIGHT
])
(;B[is];W[bq]LB[br:A]C[Please answer the white ko threat at A.]
(;B[gr]C[Black lives but white can play 2 moves in a row around her ko threat.])
(;B[br];W[js]LB[bp:A]C[If you search for a ko threat play at A.
]
(;B[bp];W[es]
C[Ignoring your ko threat white kills your group. You could have lived unconditionally.
])
(;B[gr];W[es];B[is]C[RIGHT You have got it. Ko is not necessary.
])
)
)
)
(;B[ls];W[jr])
(;B[es];W[gr])
)
(;B[gr];W[is]LB[jr:A]
C[Eventually black has to connect at A and is then left with a dead shape inside.
])
(;B[jr];W[is]LB[gr:A]
C[Eventually black has to connect at A and is left with a dead shape inside.
])
(;B[js]C[Black dies in gote.
])
)