(;GM[1]FF[4]SZ[19]
GN[The comb formation]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem22/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem22/Solution

The comb formation]
PL[B]

AB[cq][dq][eq][br][fr][bs]
AW[dn][co][bp][dp][ep][bq][fq][gq][ar][gr]
LB[dr:b][ds:a]

;B[fs]C[B1]MN[1]

;LB[dr:b][ds:a]
)
