(;GM[1]FF[4]SZ[19]
GN[sente & a perfect wall]
PC[http://senseis.xmp.net/?DontTakeAwayYourOwnLiberties]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?DontTakeAwayYourOwnLiberties

sente & a perfect wall]
PL[W]

AB[ca][ga][cb][gb][dc][ec][fc][gc]
AW[ha][bb][hb][bc][cc][hc][dd][fd][gd][id][bf]

;W[ed]C[W1]MN[1]
;B[eb]C[B2]MN[2]

;
)
