(;GM[1]FF[4]SZ[19]
GN[Main line]
PC[http://senseis.xmp.net/?XuanxuanQijingProblem209/Solution]AP[GoWiki:2009]
DT[2013-04-01]
C[Diagram from http://senseis.xmp.net/?XuanxuanQijingProblem209/Solution

Main line]
PL[B]

AB[cp][dp][cq][dq]
AW[ar][br][bs]

;B[eo]C[B1]MN[1]
;W[er]C[W2]MN[2]
;B[ds]C[B3]MN[3]
;W[bo]C[W4]MN[4]
;B[ap]C[B5]MN[5]
;W[dr]C[W6]MN[6]
;B[cr]C[B7]MN[7]
;W[cs]C[W8]MN[8]
;B[fr]C[B9]MN[9]
;W[fq]C[W10]MN[10]

;
)
