I'll sub.
I don't know much about the candidates in this particular era other than Boris Yeltsin. I guess we'll see what happens.
Quick summary of each candidate :
Bakatin is the last leader of the KGB and runs here as a moderate communist who wants to keep the USSR alive and engage a smooth transition towards a market economy as well as a struggle against corruption while also being highly critical of Gorbachev's foreign policy;
Yeltsin is self-explanatory;
Zhirinovsky is commonly called a showman due to his extravagant ultranationalistic rhetorics (IRL he wanted to retake Alaska from the Americans and to send all nuclear waste to the Baltics) but his 1991 campaign isn't as mad yet (more of the average far right populist type, such as the defence of ethnic Russian interests, the end of economic help to other socialist countries, the proclamation of Russia as an undividable land and a ban on foreign investments);
Makashov is another picturesque character, a self-described "nationalist communist" mainly supported by neo-Stalinists whose program is a mix of nostalgia for the pre-Khrushchev years, intense militarism, pro-workers rhetorics and Doctors' Plot-era antisemitic paranoia;
Tuleyev is the only candidate to be from an ethnic minority (he has a Kazakh father and a Tatar mother) and styles himself here as a left-wing populist who promises to give more autonomy to ethnic minorities, expand mining, enact some much-needed incremental economic reforms and create a genuine welfare state;
Fyodorov isn't a politician first but a famed surgeon, a background that reflects in its projects as he wants to fully use Russia's intellectual potential in order to compete with the USA and Japan while also planning to remodel the economy on the Chinese model, de-nationalize a lot of companies and placing others in the hands of workers' cooperatives;
Yavlinsky, finally, is an economic reformist who aims to turn the current planned system into a free market one, create an economic union between all former SSRs, enact progressivist social policies and overall keep cordial relationships with the West.