(;GM[1]FF[4]SZ[19]
GN[(B1 can also be at __''r''__)]
PC[http://senseis.xmp.net/?XuanxuanQijingProblem339/Solution]AP[GoWiki:2009]
DT[2013-04-01]
C[Diagram from http://senseis.xmp.net/?XuanxuanQijingProblem339/Solution

(B1 can also be at __''r''__)]
PL[B]

AB[en][fn][gn][co][do][ho][cp][hp][cq][fq][hq][cr][hr][cs]
AW[fo][dp][ep][gp][dq][gq][dr][gr][ds]
LB[er:r]

;B[fp]C[B1]MN[1]
;W[fr]C[W2]MN[2]

;LB[er:r]
)
