(;GM[1]FF[4]SZ[19]
GN[Option "i"]
PC[http://senseis.xmp.net/?KyuExercise40/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?KyuExercise40/Attempts

Option "i"]
PL[B]

AB[ga][ha][fb][gb][ac][bc][ec][fc][cd][dd][ed]
AW[ia][cb][hb][ib][gc][hc][ad][bd][fd][gd][ae][ce][ee][bf][cf][ef]
CR[ac][bc]

;B[db]C[B1]MN[1]
;W[cc]C[W2]MN[2]
;B[ea]C[B3]MN[3]

;CR[ac][bc]
)
