(;AB[rr]AB[rq]AB[qp]AB[ro]AB[po]AB[oo]AB[no]AB[mo]AB[lo]AB[lp]AB[lq]AB[lr]AB[ms]AB[ns]AB[nr]AW[os]AW[or]AW[mr]AW[mq]AW[mp]AW[np]AW[op]AW[pp]AW[qq]AW[qr]AW[qs]C[Black to play]AP[goproblems]
(;B[ls]LB[pr:a]LB[oq:b]C[Connecting at the root of Black's shape with 1 is the answer. If next White 'a', Black can hane at 'b'. RIGHT])
(;B[ps]
(;W[pr]
(;B[nq];W[oq])
(;B[ls];W[nq])
(;B[oq];W[pq]))
(;W[nq]
(;B[ls];W[pq])
(;B[pq];W[ls])))
(;B[oq];W[pq]
(;B[pr]
(;W[nq])
(;W[ps];B[ls];W[nq]))
(;B[ls];W[nq]))
(;B[pq]
(;W[pr]C[CHOICE]
(;B[oq];W[nq])
(;B[nq];W[oq]))
(;W[oq];B[ls];W[pr]))
(;B[nq];W[oq];B[ls];W[pr])
(;B[pr];W[nq];B[ls];W[pq]))