(;GM[1]FF[4]SZ[19]
GN[Black wins]
PC[https://senseis.xmp.net/?GokyoShumyoSection4Problem53/Solution]AP[GoWiki:2009]
DT[2022-12-30]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection4Problem53/Solution

Black wins]
PL[B]

AB[fb][dc][ec][fc][bd][cd][be][af][bg]
AW[cb][eb][cc][dd][ce][ee][bf][cf][bh][ch]
CR[bg]

;B[bb]C[B1]MN[1]
;W[bc]C[W2]MN[2]
;B[ac]C[B3]MN[3]
;W[ba]C[W4]MN[4]
;B[ab]C[B5]MN[5]
;W[db]C[W6]MN[6]
;B[ea]C[B7]MN[7]
;W[ca]C[W8]MN[8]
;B[fa]C[B9]MN[9]

;CR[bg]
)
