(;GM[1]FF[4]SZ[19]
GN[Black plays for a [strong group\]]
PC[http://senseis.xmp.net/?MakeBothEndsStrong]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?MakeBothEndsStrong

Black plays for a [strong group\]]
PL[W]

AB[fc][qc][od]
AW[dd]

;W[df]C[W1]MN[1]
;B[db]C[B2]MN[2]
;W[cc]C[W3]MN[3]
;B[ic]C[B4]MN[4]

;
)
