1. Victor Chernov 1917- (Socialist-Revolutionary Party)
2a. Lavr Kornilov 1918-1921 (Military Government)
2b. Lavr Kornilov 1921-1928 (National Salvation Movement)
3. Alexei I March 1928 - October 1928 (restored Romanov rule)
Note: this assumes that:
* Nikolay II abdicates in favor of Alexei (that was his initial intention)
* Romanov family is not killed,
* Alexei lives to said October 1928 (he had haemophilia)
Hint: after Alexei dies childless, you can have dispute over succession similar to OTL.
