(;GM[1]FF[4]SZ[19]
GN[Solution]
PC[http://senseis.xmp.net/?GokyoShumyoSection4Problem28/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection4Problem28/Solution

Solution]
PL[B]

AB[ab][cb][db][dc][gc][ed][fd][gd][be][ce][de][ee][ef][bg][cg][dg][cj]
AW[bb][eb][gb][hb][cc][ec][fc][bd][cd][dd][ae][ge][he][af][bf][cf][df][eg][fg]

;W[ca]C[W4]MN[4]
;B[ad]C[B5]MN[5]
;W[ac]C[W6]MN[6]
;B[ag]C[B7]MN[7]

;
)
