(;GM[1]FF[4]SZ[19]
GN[Seki]
PC[http://senseis.xmp.net/?BeginnerExercise154/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise154/Solution

Seki]
PL[B]

AB[an][bn][bo][co][cp][dp][ep][eq][ar][er][fr][fs]
AW[ao][ap][bp][bq][cq][br][dr][ds][es]

;B[bs]C[B1]MN[1]
;W[dq]C[W2]MN[2]
;B[cs]C[B3]MN[3]

;
)
