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

Staircase: descent]
PL[B]

AB[kp][gq][jq]
AW[jp][iq]
CR[iq]
LB[jo:c][hp:d][ip:b][kq:x][ir:a]

;B[jr]C[B1]MN[1]

;CR[iq]
LB[jo:c][hp:d][ip:b][kq:x][ir:a]
)
