(;GM[1]FF[4]SZ[19]
GN[Must protect the cut or the corner gets traded for a ponnuki (see [4-4 point 3-3 invasion double-hane\])]
PC[http://senseis.xmp.net/?WuRenGo2/White]AP[GoWiki:2009]
DT[2009-11-03]
C[Diagram from http://senseis.xmp.net/?WuRenGo2/White

Must protect the cut or the corner gets traded for a ponnuki (see [4-4 point 3-3 invasion double-hane\])]
PL[B]

AB[on][po][pp][pq]
AW[qn][qp][qq]

;B[qo]C[B1]MN[1]
;W[ro]C[W2]MN[2]
;B[rn]C[B3]MN[3]
;W[rm]C[W4]MN[4]
;B[rp]C[B5]MN[5]
;W[sn]C[W6]MN[6]
;B[rq]C[B7]MN[7]

;
)
