(;GM[1]FF[4]SZ[9]
GN[Extend from a strong group]
PC[http://senseis.xmp.net/?TheArtOf9x9Go/GameI1]AP[GoWiki:2009]
DT[2016-10-04]
C[Diagram from http://senseis.xmp.net/?TheArtOf9x9Go/GameI1

Extend from a strong group]
PL[B]

AB[da][cb][db][cc][bd][hd][ce][fe][ge][he][ef][gf][eg][fg][dh][fh]
AW[eb][dc][ec][hc][fd][gd][de][ee][bf][df][cg][gg][hg][ch][eh]
LB[ic:b][ci:a]

;B[ea]C[B33]MN[33]

;LB[ic:b][ci:a]
)
