(;GM[1]FF[4]SZ[19]
GN[]
PC[http://senseis.xmp.net/?XuanxuanQijingProblem142/Solution]AP[GoWiki:2009]
DT[2013-04-01]
C[Diagram from http://senseis.xmp.net/?XuanxuanQijingProblem142/Solution

]
PL[B]

AB[cn][do][eo][go][ap][bp][cp][fp][gq][gr][ir]
AW[dp][aq][bq][cq][fq][cr][fr][cs]

;B[er]C[B1]MN[1]
;W[eq]C[W2]MN[2]
;B[fs]C[B3]MN[3]
;W[es]C[W4]MN[4]

;
)
