(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]
RU[Japanese]SZ[19]KM[0.00]TM[]
AW[ab][hb][bc][ec][gc][hc][bd][cd][ed][de]AB[bb][eb][fb][gb][cc][dc]C[Black to live (be careful not to get a ko).]
(;B[da]CR[da]
(;W[cb]C[CHOICE]
;B[ba]LB[da:1]CR[ba]C[RIGHTBlack 1 is the vital point to get two eyes.])
(;W[ba]C[CHOICE]
;B[cb]LB[da:1]CR[cb]C[RIGHTBlack 1 is the vital point to get two eyes.]))
(;B[ca]CR[ca]
;W[ba]LB[ca:1]CR[ba]C[If Black 1, then White 2 results in a Ko.])
(;B[ba]CR[ba]
;W[da]CR[da]
(;B[db]CR[db]
;W[ca]CR[ca]
(;B[ea]CR[ea]
;W[ga]CR[ga])
(;B[fa]CR[fa]
;W[ha]CR[ha])
(;B[ga]CR[ga]
;W[ea]CR[ea]))
(;B[ea]CR[ea]
;W[ga]CR[ga]
;B[db]CR[db]
;W[ca]CR[ca]))
(;B[cb]CR[cb]
;W[da]CR[da]))