(;GM[1]FF[4]SZ[19]
GN[]
PC[http://senseis.xmp.net/?XuanxuanQijingProblem39/Solution]AP[GoWiki:2009]
DT[2013-04-01]
C[Diagram from http://senseis.xmp.net/?XuanxuanQijingProblem39/Solution

]
PL[B]

AB[db][ob][cc][ec][gc][nc][pc][qc][ed][fd][hd][ld][nd][he][je][ke][oe][og][ph][qh][rh]
AW[eb][fb][gb][hb][pb][qb][fc][hc][kc][oc][id][jd][pd][qd][pf][qg][rg]

;B[mb]C[B1]MN[1]
;W[rc]C[W2]MN[2]
;B[ja]C[B3]MN[3]
;W[jb]C[W4]MN[4]

;
)
