(;GM[1]FF[4]SZ[19]
GN[Double-Descent - Ko]
PC[http://senseis.xmp.net/?FourStonesOnTheThirdLineInTheCorner]AP[GoWiki:2009]
DT[2012-02-13]
C[Diagram from http://senseis.xmp.net/?FourStonesOnTheThirdLineInTheCorner

Double-Descent - Ko]
PL[B]

AB[fb][ec][ad][bd][cd][dd][ed]
AW[ea][eb][ac][bc][cc][dc]

;B[ca]C[B1]MN[1]
;W[ba]C[W2]MN[2]
;B[bb]C[B3]MN[3]
;W[cb]C[W4]MN[4]
;B[aa]C[B5]MN[5]
;W[da]C[W6]MN[6]
;B[fa]C[B7]MN[7]

;
)
