(;GM[1]FF[4]SZ[19]
GN[If White counterattacks at 4]
PC[http://senseis.xmp.net/?DougSGoBlog/September2003]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?DougSGoBlog/September2003

If White counterattacks at 4]
PL[B]

AB[ak][bk][ck][cl][dl][am][dm][an][bn][dn][do][cp][dp][ep][fp][gp][hp][cq][hq][ar][br][hr][bs][cs][hs]
AW[al][bl][bm][cm][cn][bo][co][ap][bp][bq][dq][eq][fq][gq][cr][dr][gr][ds][fs][gs]

;B[er]C[B3]MN[3]
;W[ao]C[W4]MN[4]

;
)
