Historical clue formulations

• 1887 Chekhov play — 2020-03-22
• Chekhov play or its antihero — 2009-04-22
• 1887 Chekhov play — 2008-07-06
• Putin foreign minister Igor ___ — 2005-10-22
• Chekhov's first play — 2000-08-01
• Chekhov's first play — 1999-10-06