This is all about life & death - if Black can save both groups, the remaining endgame will be very short and simple.
(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]
RU[Japanese]SZ[7]KM[0.50]TM[]
AW[fb][bc][fc][bd][dd][ed][fd][be][ce][de][af][cf][bg]AB[ab][bb][eb][ac][cc][dc][ec][ad][ae][ee][fe][df][gf]C[No komi, no prisoners - Black to play and draw!]
(;B[fg]CR[fg]
(;W[dg]CR[dg]
;B[ef]CR[ef]
(;W[da]CR[da]
;B[ea]CR[ea]
(;W[ba]CR[ba]
;B[cb]CR[cb]
;W[ca]CR[ca]
(;B[fa]CR[fa]C[Jigo! RIGHT])
(;B[gd]CR[gd]
;W[fa]CR[fa]
;B[gc]CR[gc]
;W[gb]CR[gb]C[White wins by one point!]))
(;W[cb]CR[cb]
;B[db]CR[db]C[Black lives]))
(;W[ea]CR[ea]C[This is bad!]
;B[da]CR[da]
(;W[ca]CR[ca]
(;B[fa]CR[fa]
;W[cb]CR[cb]C[This is ok for white, but B made a mistake])
(;B[cb]CR[cb]
;W[db]CR[db]
;B[ba]CR[ba]C[Black lives!]))
(;W[fa]CR[fa]
;B[cb]CR[cb]
;W[gd]CR[gd]C[Black wins by one point!])))
(;W[ef]CR[ef]
;B[dg]CR[dg]C[This doesn't work for White]))
(;B[eg]CR[eg]
;W[fg]CR[fg]
(;B[ff]CR[ff]
;W[cg]CR[cg]C[Black is dead!])
(;B[cg]CR[cg]C[This is hopeless, White can play either f2 or e7]))
(;B[ef]CR[ef]
;W[fg]CR[fg]C[Black is dead!])
(;B[dg]CR[dg]
;W[fg]CR[fg]C[Black is dead!])
(;B[ca]CR[ca]
;W[ef]CR[ef]C[Black should have played at the bottom])
(;B[fa]CR[fa]
;W[ef]CR[ef]C[Black should have played at the bottom]))