(;GM[1]FF[4]SZ[19]
GN[Approach ko]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem103/Solution]AP[GoWiki:2009]
DT[2011-07-04]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem103/Solution

Approach ko]
PL[W]

AB[fa][ab][cb][eb][fb][gb][bc][cc][dc][fc][bd][fd][gd][ce][he][cf][hf][dg][fg]
AW[ca][da][bb][db][hb][jb][ec][gc][hc][cd][dd][ed][hd][ee][fe][ge]

;W[ba]C[W11]MN[11]
;B[ac]C[B12]MN[12]
;W[be]C[W13]MN[13]
;B[ha]C[B14]MN[14]
;W[ia]C[W15]MN[15]
;B[bf]C[B16]MN[16]
;W[ga]C[W17]MN[17]

;
)
