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

corner]
PL[B]

AB[dd]
AW[cj]
CR[cj]

;B[ci]C[B1]MN[1]
;W[dj]C[W2]MN[2]
;B[di]C[B3]MN[3]
;W[ei]C[W4]MN[4]

;CR[cj]
)
