(;GM[1]FF[4]SZ[19]
GN[Perfect shape for White]
PC[http://senseis.xmp.net/?WedgeFourSpaceExtension]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?WedgeFourSpaceExtension

Perfect shape for White]
PL[W]

AB[gc][cd][pd]
AW[ic][nc]

;B[qf]C[B4]MN[4]
;W[pb]C[W5]MN[5]
;B[qc]C[B6]MN[6]
;W[ld]C[W7]MN[7]

;
)
