was it winnable?

>>920186
If the bulk of German forces either took the Moscow-Leningrad railways or took Moscow, then yes. The problem originated with the splitting of forces attempting to complete each at once. If the entire force attacked only one object, then it would have been possible.

>>920233
That do depend heavily on.
The Soviets had been bulking up their armed forces near Moscow, so if the Germans had attacked their they may very well just have ran into a wall without making much progress. Even if they would have reached Moscow it don't mean they would have taken it, just like they didn't take Stalingrad and I am rather sure that city was in a shakier position.
Not advancing towards the Caucasus may actually have crippled the German war engine as they then would have been without the large amount of oil sources they conquered on the way,