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

Prepare the way]
PL[B]

AB[qb][ec][qc][qd][rf]
AW[pb][pc][cd][pd][pe][pf]
CR[cd]

;B[de]C[B1]MN[1]
;W[ce]C[W2]MN[2]
;B[df]C[B3]MN[3]
;W[cg]C[W4]MN[4]
;B[jc]C[B5]MN[5]

;CR[cd]
)
