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

Staircase: connection]
PL[B]

AB[kp][gq][jq]
AW[jp][iq]
CR[iq]
LB[ip:p]

;B[kq]C[B1]MN[1]
;W[gp]C[W2]MN[2]

;CR[iq]
LB[ip:p]
)
