(;GM[1]FF[4]SZ[19]
GN[solution]
PC[http://senseis.xmp.net/?GokyoShumyoSection5Problem4/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection5Problem4/Solution

solution]
PL[B]

AB[eb][cc][ec][cd][ed][ae][be][cf][bg][dg][dh]
AW[ea][cb][db][fb][bc][gc][bd][ce][de][fe][df][eg]

;B[bb]C[B1]MN[1]
;W[ab]C[W2]MN[2]
;B[ba]C[B3]MN[3]
;W[ca]C[W4]MN[4]
;B[ac]C[B5]MN[5]
;W[aa]C[W6]MN[6]

;
)
