(;GM[1]FF[4]SZ[19]
GN[B1 and B3 are to prepare for B7 so white cannot just connect at W1 (and thus being able to play W6 elsewhere for better eye-shape.]
PC[http://senseis.xmp.net/?XuanxuanQijingProblem283/Attempts]AP[GoWiki:2009]
DT[2013-04-01]
C[Diagram from http://senseis.xmp.net/?XuanxuanQijingProblem283/Attempts

B1 and B3 are to prepare for B7 so white cannot just connect at W1 (and thus being able to play W6 elsewhere for better eye-shape.]
PL[B]

AB[co][eo][go][ho][io][bp][ep][gp][jp][cq][dq][jq][dr][kr]
AW[hp][bq][eq][hq][br][cr][er][ir][ds]

;B[cs]C[B1]MN[1]
;W[bs]C[W2]MN[2]
;B[ar]C[B3]MN[3]
;W[aq]C[W4]MN[4]
;B[fs]C[B5]MN[5]
;W[fr]C[W6]MN[6]
;B[es]C[B7]MN[7]

;
)
