imho the best and more efficient way to capture leningrad is the direct assault over the luga river with a PG and 2 armies.
he will get a long front which eats a lot of troops which would be placed better against moscow.
against my german opponent monty i made the same mistake once and since then i always go for a frontal assault on leningrad.
by the way:
i thought that I earn the title of "sir robinovsky" but you are even faster then me.
