(;GM[1]FF[4]SZ[19]
GN[Variation (a & b) ko; black at (b) makes no difference]
PC[http://senseis.xmp.net/?XuanxuanQijingProblem285/Attempts]AP[GoWiki:2009]
DT[2013-04-01]
C[Diagram from http://senseis.xmp.net/?XuanxuanQijingProblem285/Attempts

Variation (a & b) ko; black at (b) makes no difference]
PL[B]

AB[bf][cf][dg][eh][ai][bi][bj][ej][bk][fk][gk][cl][hl][bm][cm][cn][hn][do][go][bp][cp][dp][dq][gq][cr][gr][cs]
AW[ah][bh][ch][ci][cj][ck][ek][bl][dl][fl][dm][fm][dn][en][ao][bo][co][eo][ep][eq][dr][fr][ds]
LB[am:b]

;B[al]C[B1]MN[1]
;W[bq]C[W2]MN[2]
;B[cq]C[B3]MN[3]
;W[ap]C[W4]MN[4]
;B[br]C[B5]MN[5]
;W[ar]C[W6]MN[6]

;LB[am:b]
)
