(;GM[1]FF[4]SZ[19]
GN[Attach-extend]
PC[http://senseis.xmp.net/?AttachExtend]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?AttachExtend

Attach-extend]
PL[B]

AB[hj]
AW[ji]

;B[jj]C[B1]MN[1]
;W[kj]C[W2]MN[2]
;B[jk]C[B3]MN[3]

;
)
