(;GM[1]FF[4]SZ[19]
GN[White doesn't win?]
PC[http://senseis.xmp.net/?GokyoShumyoSection4Problem90/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection4Problem90/Attempts

White doesn't win?]
PL[W]

AB[db][ec][fc][fd][gd][fe][he][ie][ef][eg][hg]
AW[cb][cc][dc][gc][hc][jc][hd][de][ee][ge][ff][gf]

;W[ed]C[W1]MN[1]
;B[gb]C[B2]MN[2]
;W[hb]C[W3]MN[3]
;B[hf]C[B4]MN[4]
;W[fb]C[W5]MN[5]
;B[eb]C[B6]MN[6]
;W[ga]C[W7]MN[7]
;B[gg]C[B8]MN[8]

;
)
