(;GM[1]FF[4]SZ[19]
GN[White creates a [ko\]]
PC[http://senseis.xmp.net/?BeginnerExercise17/Solution]AP[GoWiki:2009]
DT[2011-09-11]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise17/Solution

White creates a [ko\]]
PL[W]

AB[ca][bb][db][eb][cc][dc]
AW[fb][bc][ec][gc][bd][cd][dd][ed]

;W[ab]C[W1]MN[1]
;B[ea]C[B2]MN[2]
;W[ba]C[W3]MN[3]
;B[aa]C[B4]MN[4]

;
)
