This shape appeared in many real games. And many players
just leave it as it is. However...
(I made mistakes in providing the solution since I was
a weak player. Thanks to Hans and Grebble for pointing out
my mistakes.)
(;AW[cq][bq][aq][dr][er][fr][fs]AB[ap][bp][cp][dq][eq][fq][gr][gs][gq][dp]C[Black needs to do something in the corner.]SZ[19]
(;B[bs]
(;W[cs]
(;B[ar];W[cr]
(;B[ds]N[Seki]C[RIGHT CHOICE])
(;B[es]C[RIGHT]))
(;B[ds];W[cr];B[ar]C[RIGHT]))
(;W[cr];B[cs];W[ds];B[ar]C[RIGHT]N[Seki]))
(;B[cs];W[bs]
(;B[br];W[cr];B[as];W[ds])
(;B[cr];W[br]))
(;B[ds];W[cs];B[bs];W[cr];B[ar]C[RIGHT]))