(;GM[1]FF[4]SZ[19]
GN[Black to play]
PC[https://senseis.xmp.net/?IgoHatsuyoRonProblem17]AP[GoWiki:2009]
DT[2023-01-30]
C[Diagram from https://senseis.xmp.net/?IgoHatsuyoRonProblem17

Black to play]
PL[B]

AB[lb][mb][gc][ic][jc][kc][je]
AW[fb][nb][ec][lc][mc][fd][gd][id][nd][ke][gf][jf]

;B[na]C[B1]MN[1]
;W[oa]C[W2]MN[2]
;B[la]C[B3]MN[3]
;W[ob]C[W4]MN[4]
;B[hd]C[B5]MN[5]
;W[ie]C[W6]MN[6]
;B[gb]C[B7]MN[7]

;
)
