I am planning on tiling my kitchen floor half of which is floorboards
(which I am covering with 1/2" ply screwed every 6") the other half is
Lino laid on top of quarry tile (still sound) laid on top of concrete.

Can I fix ply (1/2" would give me a nice level floor) over the top of
the lino/tile/concrete mix (screwed into the concrete base layer) of is
it hammer and chisel time?

Thanks for any advise