Historical clue formulations

• Capital of Azerbaijan — 2023-12-12
• Capital on the Caspian — 2023-06-17
• Capital of Azerbaijan — 2021-04-02
• Transcaucasian capital — 2009-07-11
• Azerbaijan's capital — 2009-07-04
• Asian oil capital — 2006-10-26
• Capital on the Caspian Sea — 2004-10-10
• Azerbaijan's capital — 2004-05-02
• Capital of Azerbaijan — 2004-03-26
• Azerbaijan's capital — 2003-12-22
• Capital on the Caspian — 2001-10-11
• Capital on the Caspian — 1998-04-29
• Capital of Azerbaijan — 1997-12-22
• Azerbaijan's capital — 1995-07-30
• Capital on the Caspian — 1995-05-10
• Kasparov's birthplace — 1994-08-21