(;GM[1]FF[4]SZ[5]
GN[Staunch defense]
PC[http://senseis.xmp.net/?GoneProblem3/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GoneProblem3/Solution

Staunch defense]
PL[W]

AB[aa][bc][ad][dd][be][ce]
AW[ca][ea][db][cc][ec][cd]

;B[cb]C[B2]MN[2]
;W[bd]C[W3]MN[3]
;B[ab]C[B4]MN[4]
;W[de]C[W5]MN[5]
;B[ed]C[B6]MN[6]
;W[ba]C[W7]MN[7]

;
)
