I gotta agree with Mr. Shafley . . . your description and drawing (which is quite good, by the way, very clear) is pretty much a textbook "sumo-style" deadlift . . . characterized by wide stance, toes at 10:30 and 1:30, and a somewhat narrow grip on the bar, taken between the knees.
If you're interested in seeing where an obsession with the sumo deadlift (and with very heavy, partial-range movements in general) can lead you, check out:
and follow the links to the "sumo pages" on the left side of this screen.