(;GM[1]FF[4]SZ[19]
GN[How to deal with this situation?]
PC[http://senseis.xmp.net/?Butterfly]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?Butterfly

How to deal with this situation?]
PL[W]

AB[gc][dd][ge][cg]
CR[ge]
LB[ac:a][bc:b]

;W[cc]C[W1]MN[1]
;B[cd]C[B2]MN[2]
;W[dc]C[W3]MN[3]
;B[eb]C[B4]MN[4]
;W[bd]C[W5]MN[5]
;B[be]C[B6]MN[6]
;W[bb]C[W7]MN[7]
;B[ad]C[B8]MN[8]

;CR[ge]
LB[ac:a][bc:b]
)
