(;GM[1]FF[4]SZ[19]
GN[Black to play and connect underneath]
PC[https://senseis.xmp.net/?GokyoShumyoSection6Problem61/Solution]AP[GoWiki:2009]
DT[2023-01-23]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection6Problem61/Solution

Black to play and connect underneath]
PL[B]

AB[dc][ec][jc][kc][ed][id][ee][fe][ge][hf]
AW[cc][cd][dd][fd][gd][hd][jd][he][je][df][if][fg][ig][gh]
LB[fa:a][gf:b]

;B[gb]C[B1]MN[1]
;W[hb]C[W2]MN[2]
;B[hc]C[B3]MN[3]
;W[gc]C[W4]MN[4]
;B[ic]C[B5]MN[5]
;W[fb]C[W6]MN[6]
;B[ie]C[B7]MN[7]
;W[fc]C[W8]MN[8]
;B[ga]C[B9]MN[9]

;LB[fa:a][gf:b]
)
