(;GM[1]FF[4]SZ[19]
GN[Variation at 4]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem89/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem89/Solution

Variation at 4]
PL[B]

AB[rb][mc][nd][od][pd][qd][rd]
AW[pb][lc][nc][oc][ld][md][ne][re][of][qf]

;B[nb]C[B1]MN[1]
;W[mb]C[W2]MN[2]
;B[pc]C[B3]MN[3]
;W[ob]C[W4]MN[4]
;B[qb]C[B5]MN[5]

;
)
