(;GM[1]FF[4]SZ[19]
GN[Black connects A]
PC[https://senseis.xmp.net/?GokyoShumyoSection6Problem37/Solution]AP[GoWiki:2009]
DT[2023-01-24]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection6Problem37/Solution

Black connects A]
PL[B]

AB[da][db][ib][dc][hc][kc][dd][id][ce][ke][cf]
AW[cb][eb][bc][fc][bd][hd][fe][he][df][ef][bg][cg]

;B[fd]C[B1]MN[1]
;W[gd]C[W2]MN[2]
;B[gc]C[B3]MN[3]
;W[ed]C[W4]MN[4]
;B[fb]C[B5]MN[5]

;
)
