(;GM[1]FF[4]SZ[19]
GN[Black wins]
PC[https://senseis.xmp.net/?GokyoShumyoSection4Problem61/Solution]AP[GoWiki:2009]
DT[2022-12-30]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection4Problem61/Solution

Black wins]
PL[B]

AB[ba][db][ib][cc][dc][jc][lc][dd][ed][id][jd][ee][fe][ge][he][je]
AW[ca][da][ab][cb][eb][bc][ec][hc][ic][cd][fd][gd][hd][ce][ie][df][gf][hf][if]

;B[fc]C[B1]MN[1]
;W[hb]C[W2]MN[2]
;B[fb]C[B3]MN[3]
;W[ea]C[W4]MN[4]
;B[ha]C[B5]MN[5]
;W[jb]C[W6]MN[6]
;B[ia]C[B7]MN[7]
;W[ga]C[W8]MN[8]
;B[fa]C[B9]MN[9]

;
)
