(;GM[1]FF[4]SZ[19]
GN[[TimK\]: If 2 and 4, White sacrifices two stones...]
PC[http://senseis.xmp.net/?KyuExercise79/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?KyuExercise79/Attempts

[TimK\]: If 2 and 4, White sacrifices two stones...]
PL[W]

AB[ab][bb][cb][db][fb][ec]
AW[gb][hb][bc][dc][fc][bd][dd][fd][ee]

;W[ba]C[W1]MN[1]
;B[ca]C[B2]MN[2]
;W[ea]C[W3]MN[3]
;B[fa]C[B4]MN[4]
;W[eb]C[W5]MN[5]
;B[da]C[B6]MN[6]

;
)
