(;GM[1]FF[4]SZ[19]
GN[]
PC[http://senseis.xmp.net/?GokyoShumyoSection5Problem20/Attempts]AP[GoWiki:2009]
DT[2014-01-28]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection5Problem20/Attempts

]
PL[B]

AB[gb][jb][dc][ec][fc][gc][hc][ic][jc][ed][be][ce][de]
AW[ea][ga][ja][db][eb][fb][hb][ib][kb][cc][kc][cd][dd][jd][kd][ee][fe][he]

;W[bb]C[W2]MN[2]
;W[ba]C[W4]MN[4]
;B[bc]C[B5]MN[5]
;W[da]C[W6]MN[6]
;B[cb]C[B7]MN[7]

;
)
