(;GM[1]FF[4]SZ[19]
GN[3-3 invasion alternative]
PC[http://senseis.xmp.net/?Butterfly]AP[GoWiki:2009]
DT[2012-09-05]
C[Diagram from http://senseis.xmp.net/?Butterfly

3-3 invasion alternative]
PL[W]

AB[eb][dc][gc][dd][ce][bf][cf][cg]
AW[db][cc][cd][be][de]
LB[ca:c]

;W[bb]C[W11]MN[11]
;B[da]C[B12]MN[12]
;W[ad]C[W13]MN[13]
;B[cb]C[B14]MN[14]
;W[ba]C[W15]MN[15]

;LB[ca:c]
)
