(;GM[1]FF[4]SZ[19]
GN[Black to play and connect underneath]
PC[https://senseis.xmp.net/?GokyoShumyoSection6Problem62/Solution]AP[GoWiki:2009]
DT[2023-01-23]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection6Problem62/Solution

Black to play and connect underneath]
PL[B]

AB[ca][db][dc][fc][gc][kc][lc][dd][id][jd]
AW[bb][cb][hc][bd][fd][gd][kd][ce][he][ie][je][ef]

;B[ib]C[B1]MN[1]
;W[hb]C[W2]MN[2]
;B[ha]C[B3]MN[3]
;W[ic]C[W4]MN[4]
;B[jc]C[B5]MN[5]
;W[jb]C[W6]MN[6]
;B[ia]C[B7]MN[7]
;W[ga]C[W8]MN[8]
;B[hd]C[B9]MN[9]
;W[ja]C[W10]MN[10]

;
)
