(;GM[1]FF[4]SZ[19]
GN[Security of the two-point extension]
PC[http://senseis.xmp.net/?TwoSpaceExtensionOnTheThirdLineCannotBeCut]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?TwoSpaceExtensionOnTheThirdLineCannotBeCut

Security of the two-point extension]
PL[B]

AB[ec][cd][cg][co]
AW[ci][cl]

;B[cj]C[B1]MN[1]
;W[bj]C[W2]MN[2]
;B[bi]C[B3]MN[3]
;W[ck]C[W4]MN[4]
;B[dj]C[B5]MN[5]
;W[bh]C[W6]MN[6]

;
)
