If we reverse the assumptions of Moltke and hand him the one-front war in the East instead, then I would predict a rather costly but manageable German victory. Here I assume A-H is side lined too, so you benefit from the full weight of the Russian Armies opposed opposite the full German Army. Russia has a manpower reserve greater than Germany but lacks weaponry or the ability to expand, replace or sustain losses in vital equipment, moreover Russia would be forced to import these and munitions, potentially levelling but I will assume not fast enough. If the battles are in maneuver on the open terrain of Russia the Germans are playing to their strength and should be better able to win more of these battles. If Germany is forced to extend fully into Russia and overcome fortifications, losses go up but German heavy artillery can dismantle fortifications in time. And if Russia strikes first, Germany plays to its even stronger suit, fighting on interior lines and shifting to find battles it can win in detail as Russian forces clog themselves into relatively predictable routes. I do not underestimate that Russia has some good leaders, brave and capable men, many of them, but Russia lacks depth of talent, in this attrition war within a maneuver war the Germans have the edge over time to more readily respond to the shift between defense to offensive to maneuver and back. Russian logistics are simply dismal, the system itself is just not robust or responsive enough to excel. Germany is best in a short violent war played on the other teams home ground where it can inflict higher damage and move to points that when lost unravel the enemy's will to continue, they are next best where they lure one into the pockets for enveloping counter attacks, they are weakest in a long sustained attrition war, but the later may not develop sufficiently to balance the industrial capability of Germany versus the expansive but still agricultural Russians. The Germans were respected for a reason, they were likely the best land power one versus one at the time, and economically they are the equal of any other power, even Russia was not yet developed in enough depth to beat them in such a highly artificial scenario. Thus the reason alliances became both vital and destabilizing, they contained Germany but opened the thinking to taking her on. In 1914 the locker room bravado prevailed and the Franco-Russian combine with Britain virtually assured jumped at the chance, it still took four years, mass death and all the treasure to bring the Germans to the table, leaving Europe a broken remnant of itself.