Could Napoleon have won if he attacked Moscow instead of retreating?

Napoleon actually reached Moscow and indeed occupied it. However it was a Pyrrhic victory. The Russians had burnt much of the city to the ground denying the Corsican the spoils of war. However this was only part of the problem. As the cliche goes an Army marches on its stomach and the Russian scorched Earth policy had seen to it that the Grand Army’s supply lines were not sustainable. Faced with hunger, General Winter and effective Cossack hit and run strategies he had no option but to retreat. What defeated Napoleon wasn’t Russian military prowess but Mother Nature’s icy hand holding down the scale on the necessities for life.