(;GM[1]FF[4]SZ[19]
GN[19x19 diagram]
PC[http://senseis.xmp.net/?ActiveDefense]AP[GoWiki:2009]
DT[2012-01-10]
C[Diagram from http://senseis.xmp.net/?ActiveDefense

19x19 diagram]
PL[W]

AB[pd][jp][pp][fq]
AW[dd][cn][dp]
LB[pk:a]

;W[qn]C[W1]MN[1]
;B[ql]C[B2]MN[2]
;W[on]C[W3]MN[3]
;B[np]C[B4]MN[4]

;LB[pk:a]
)
