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

Countering the descent]
PL[W]

AB[qn][pq][qq][rq]
AW[ql][pp][qp][oq]

;W[op]C[W1]MN[1]
;B[rp]C[B2]MN[2]
;W[qo]C[W3]MN[3]
;B[ro]C[B4]MN[4]
;W[pn]C[W5]MN[5]

;
)
