"Lenin, worried about the double offensive at that time victorious of Kolchak in the east and Denikin in the south, had Litvinov, Deputy Commissar for Foreign Affairs, transmit March 1 1919 to US President Wilson to freeze the situation acquired by each force present: he made him a proposal for an armistice between the various fighting forces in Russia followed by a conference bringing them together. The armistice would be accompanied by the status quo: each force would keep the territory it would govern at the time of its signature, the blockade of the country would be lifted and all existing Russian governments would recognize themselves responsible for the debts of the Empire. Thus Lenin wanted to sign a real inner Brest-Litovsk, a peace that granted a huge part of the territory to Denikin and Kolchak. The latter, sure of their imminent victory, refused any discussion with the Bolsheviks, whom they considered insulting badly, and rejected a proposal in which they saw Lenin's implicit admission of the imminent defeat of the Red Army." (Jean-Jacques Marie, french troskist historian) (I some edited)
A political option not ingame, but, if historically important, it is not so interesting as it would means a game without a proper end (nobody really wins).