(;GM[1]
FF[4]
AP[Hibiscus:2.1]
SZ[19]
ST[3]
;AB[ao][aq][ar][as][bo][br][bs][cp][dp][ep][eq][er][es][pq][pr][qq][rp][rq][sp]
AW[ap][bp][bq][cq][dq][dr][ds][op][oq][or][os][pp][qp][ro][rr][rs][so][sq][sr][ss]
LB[ps:A]PL[B]
C[If you think the left White group is alive play at A
and if you think the left White group can be killed
go ahead.]
(;B[ps]
;W[qr]
;B[qs]
;W[rr]
(;B[sr]
;W[rs]
C[RIGHT
seki]
)(;B[rs]
;W[sr]
))(;B[cr]
;W[cs]
(;B[br]
;W[ar]
LB[bs:A]C[Now if Black plays at A White will be
alive in seki.]
)(;B[ar]
;W[br]
))(;B[cs]
;W[cr]
(;B[br]
;W[bs]
C[Now if Black plays at A White will be
alive in seki.]
LB[ar:A])(;B[bs]
;W[ar]
C[Now if Black plays at A White will be
alive in seki.]
LB[br:A])(;B[ar]
;W[bs]
C[Now if Black plays at A White will be
alive in seki.]
LB[br:A])))