(;FF[4]GM[1]CA[UTF-8]AP[besogo:0.0.2-alpha]SZ[19]ST[0]
AB[ab][ac][ad][bb][cb][dc][de][df][ed][ef][fb][fc][fd][fe][gf]AW[ae][bc][bd][be][cc][ce][cf][db][dd][eb][gb][gc][gd][ge][hc]LB[db:A]
C[How to answer A?]
(;B[ec]
(;W[ca]
(;B[ea]
C[good! RIGHT CHOICE])
(;B[da]
;W[ea]
;B[fa]
C[good! RIGHT])
(;B[fa]
;W[ba]
C[B is captured!]))
(;W[fa]
(;B[da]
C[good! RIGHT CHOICE])
(;B[ea]
;W[da]
(;B[ca]
C[good! RIGHT])
(;B[ga]
;W[ca]LB[ea:1]
C[B can only get ko here!]))))
(;B[da]
;W[ec]CR[db][eb]LB[ea:1]
C[B can connect but W saved the 2 stones!])
(;B[ea]
;W[ec]CR[db][eb]LB[da:1]
C[B can connect but W saved the 2 stones!])
(;B[ca]
;W[ec]CR[db][eb]LB[ea:1]
C[B can connect but W saved the 2 stones!])
(;B[fa]
;W[ca]
C[B is captured!])
(;B[cd]
;W[ca]
C[B is captured!]))