(;GM[1]FF[4]SZ[19]
GN[ko]
PC[http://senseis.xmp.net/?BeginnerExercise95/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise95/Solution

ko]
PL[B]

AB[ao][bo][co][cp][fp][dq][eq][fr][fs]
AW[ap][bp][aq][bq][cq][cr][dr][er][es]
LB[ar:c]

;B[bs]C[B1]MN[1]
;W[br]C[W2]MN[2]
;B[cs]C[B3]MN[3]
;W[as]C[W4]MN[4]

;LB[ar:c]
)
