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

Attach and extend]
PL[B]

AB[ii]
AW[hk]
CR[ii]
LB[hj:b][jl:a]

;B[ik]C[B1]MN[1]
;W[il]C[W2]MN[2]
;B[jk]C[B3]MN[3]

;CR[ii]
LB[hj:b][jl:a]
)
