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

Staircase]
PL[B]

AB[kp][gq]
AW[jp]
CR[jp]

;B[jq]C[B1]MN[1]
;W[iq]C[W2]MN[2]

;CR[jp]
)
