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

Black can answer at 4]
PL[W]

AB[cb][cc][cd][be][ce]
AW[db][eb][dc][dd][bf][cf][df][ff][bg]
LB[ab:a]

;W[bb]C[W1]MN[1]
;B[ba]C[B2]MN[2]
;W[bc]C[W3]MN[3]
;B[ac]C[B4]MN[4]

;LB[ab:a]
)
