(;GM[1]FF[4]SZ[19]
GN[2. The connection]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem33/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem33/Solution

2. The connection]
PL[B]

AB[pa][pb][oc][nd][od][pd][qd][of][pf]
AW[nb][ob][qb][lc][nc][qc][md][ne][qe][qf][ng][pg][qh]

;B[rb]C[B1]MN[1]
;W[rd]C[W2]MN[2]
;B[rc]C[B3]MN[3]
;W[re]C[W4]MN[4]

;
)
