(;GM[1]FF[4]SZ[19]
GN[Does it work?]
PC[http://senseis.xmp.net/?KyuExercise20/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?KyuExercise20/Solution

Does it work?]
PL[W]

AB[io][bq][cq][dq][iq][cr][er][ir]
AW[bn][fo][bp][cp][dp][eq][fq][hq][fr][hr]

;W[ar]C[W1]MN[1]
;B[ds]C[B2]MN[2]
;W[aq]C[W3]MN[3]
;B[br]C[B4]MN[4]
;W[bs]C[W5]MN[5]
;B[cs]C[B6]MN[6]
;W[ap]C[W7]MN[7]

;
)
