(;GM[1]FF[4]SZ[19]
GN[Black's attack]
PC[http://senseis.xmp.net/?BQM229]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BQM229

Black's attack]
PL[B]

AB[oa][mb][nb][oc][od][pd][qd][sd][re][qf]
AW[na][ob][pb][rb][pc][qc][rc][rd]

;B[qa]C[B1]MN[1]
;W[ra]C[W2]MN[2]
;B[pa]C[B3]MN[3]

;
)
