(;GM[1]FF[4]SZ[19]
GN[What about this ko?]
PC[http://senseis.xmp.net/?KyuExercise173/Attempts]AP[GoWiki:2009]
DT[2011-09-10]
C[Diagram from http://senseis.xmp.net/?KyuExercise173/Attempts

What about this ko?]
PL[B]

AB[ao][bo][co][do][ep][eq][er][es]
AW[bp][cp][cr][dr][ds]

;B[bs]C[B1]MN[1]
;W[br]C[W2]MN[2]
;B[ap]C[B3]MN[3]
;W[aq]C[W4]MN[4]
;B[dq]C[B5]MN[5]
;W[cq]C[W6]MN[6]
;B[ar]C[B7]MN[7]

;
)
