Historical clue formulations

• Tricks — 2023-11-04
• They start in the corners — 2022-11-13
• Accompaniers of knights — 2021-10-21
• Corner pieces in chess — 2021-10-04
• Corner pieces, in chess — 2009-05-19
• Chisels — 2007-12-06
• Cons — 2004-04-15
• Movable castles — 2002-03-26
• Movable castles — 1999-06-18
• King protectors — 1997-09-28