(;GM[1]FF[4]SZ[19]
GN[variation]
PC[http://senseis.xmp.net/?GokyoShumyoSection4Problem21/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection4Problem21/Attempts

variation]
PL[B]

AB[eb][fb][cc][dc][gc][cd][ce]
AW[cb][db][bc][ec][dd][ed][bf][df][cg]

;B[bb]C[B1]MN[1]
;W[ab]C[W2]MN[2]
;B[ba]C[B3]MN[3]

;
)
