(;GM[1]FF[4]SZ[19]
GN[How about a ko? (9 at 1)]
PC[http://senseis.xmp.net/?XuanxuanQijingProblem20/Attempts]AP[GoWiki:2009]
DT[2013-04-01]
C[Diagram from http://senseis.xmp.net/?XuanxuanQijingProblem20/Attempts

How about a ko? (9 at 1)]
PL[B]

AB[hp][ip][fq][gq][jq][kq][lr]
AW[ep][fp][gp][eq][hq][iq][jr]

;B[hr]C[B1]MN[1]
;W[ir]C[W2]MN[2]
;B[fr]C[B3]MN[3]
;W[hs]C[W4]MN[4]
;B[gs]C[B5]MN[5]
;W[gr]C[W6]MN[6]
;B[er]C[B7]MN[7]
;W[dr]C[W8]MN[8]
;B[hr]C[B9]MN[9]

;
)
