(;GM[1]FF[4]SZ[19]
GN[Variation at 4]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem20/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem20/Solution

Variation at 4]
PL[B]

AB[bq][cq][dq][eq][ar][er][cs]
AW[co][bp][dp][ep][fq][hq][br][cr][fr]
LB[dr:a][as:b]

;W[bs]C[W4]MN[4]
;B[ds]C[B5]MN[5]

;LB[dr:a][as:b]
)
