(;GM[1]FF[4]SZ[19]
GN[Another common idea.]
PC[http://senseis.xmp.net/?BQM164]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BQM164

Another common idea.]
PL[B]

AB[cc][fc][dd]
AW[bd][cf][ci]

;B[dh]C[B1]MN[1]
;W[ch]C[W2]MN[2]
;B[df]C[B3]MN[3]

;
)
