(;GM[1]FF[4]SZ[19]
GN[(B1 can also be at __''r''__ or __''s''__)]
PC[http://senseis.xmp.net/?XuanxuanQijingProblem142/Solution]AP[GoWiki:2009]
DT[2013-04-01]
C[Diagram from http://senseis.xmp.net/?XuanxuanQijingProblem142/Solution

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

AB[cn][do][eo][go][ap][bp][cp][fp][gq][gr][ir]
AW[dp][aq][bq][cq][fq][cr][fr][cs]
LB[dq:r][ds:s]

;B[ep]C[B1]MN[1]
;W[dr]C[W2]MN[2]

;LB[dq:r][ds:s]
)
