This problem is build around the corner shown in the previous problem.
(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]
RU[Japanese]SZ[7]KM[0.00]
PW[Weiß]PB[Schwarz]AW[ca][fa][bb][cb][db][eb][fb][gb][cc][cd][ed][fd][ae][ce][ee][ef][gf][eg]AB[aa][ba][ab][ac][bc][dc][ec][fc][gc][bd][dd][be][de][af][bf][cf][df][dg]C[Black to play - will he win, lose or draw?]
(;B[ff]CR[ff]
(;W[fg]CR[fg]
;B[ge]CR[ge]
(;W[fe]CR[fe]
;B[gd]CR[gd]C[Jigo! RIGHT])
(;W[gd]CR[gd]
;B[gg]CR[gg]C[White can't play this way, he has no ko threat]))
(;W[gd]CR[gd]
;B[fg]CR[fg]C[This is a dead shape, WG4 was a mistake!]))
(;B[gd]CR[gd]
;W[ge]CR[ge]C[White wins by one point]))