(;GM[1]FF[4]SZ[19]
GN[ko (B4 at W1)]
PC[https://senseis.xmp.net/?GokyoShumyoSection3Problem74/Solution]AP[GoWiki:2009]
DT[2023-01-03]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection3Problem74/Solution

ko (B4 at W1)]
PL[W]

AB[ap][bp][cq][dq][eq][gq][hq][ar][br][fr][gr][hr]
AW[cl][co][cp][ep][fp][gp][fq][cr][dr][er][fs]
LB[am:a][gs:b]

;W[bq]C[W1]MN[1]
;B[aq]C[B2]MN[2]
;W[dp]C[W3]MN[3]
;B[bq]C[B4]MN[4]
;W[bs]C[W5]MN[5]
;B[bo]C[B6]MN[6]
;W[bn]C[W7]MN[7]
;B[an]C[B8]MN[8]
;W[bm]C[W9]MN[9]
;B[es]C[B10]MN[10]

;LB[am:a][gs:b]
)
