(;GM[1]FF[4]SZ[19]
GN[variation]
PC[http://senseis.xmp.net/?GokyoShumyoSection2Problem16/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection2Problem16/Attempts

variation]
PL[B]

AB[fb][ec][fc][ad][bd][cd][dd]
AW[ea][eb][bc][cc][dc]

;B[ca]C[B1]MN[1]
;W[cb]C[W2]MN[2]
;B[ba]C[B3]MN[3]
;W[bb]C[W4]MN[4]
;B[fa]C[B5]MN[5]
;W[db]C[W6]MN[6]
;B[ac]C[B7]MN[7]

;
)
