Historical clue formulations

• Anna Karenina's lover — 2015-12-20
• Kosygin of Russia — 2014-07-02
• Kosygin of Russia — 2013-12-04
• Tolstoy's Vronsky — 2010-05-28
• Only son of Czar Nicholas II — 2008-04-29
• Cosmonaut Leonov, the first human to walk in space — 2007-10-03
• ___ Nikolaevich, last czarevitch of Russia — 2007-08-23
• Anna's lover in "Anna Karenina" — 2006-12-14
• 2002 Olympic skating gold medalist Yagudin — 2005-01-02
• Soviet leader ___ Kosygin — 2004-01-05
• Anna Karenina's husband — 2003-12-07
• Nikita's successor — 1997-11-30
• Successor of Nikita — 1997-10-17
• Mr. Kosygin — 1995-02-02