(;GM[1]FF[4]SZ[19]
GN[White to play and live by [oiotoshi\]. The solution is a ko.]
PC[http://senseis.xmp.net/?GokyoShumyoSection5Problem6/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection5Problem6/Attempts

White to play and live by [oiotoshi\]. The solution is a ko.]
PL[W]

AB[fa][db][eb][gb][bc][cc][hc][gd][ce][ge][cf][ef]
AW[fb][ac][dc][fc][bd][cd][dd][fd]

;W[ea]C[W1]MN[1]
;B[da]C[B2]MN[2]
;W[cb]C[W3]MN[3]
;B[bb]C[B4]MN[4]
;W[ba]C[W5]MN[5]
;B[ca]C[B6]MN[6]
;W[ab]C[W7]MN[7]
;W[ec]C[W9]MN[9]

;
)
