Historical clue formulations

• "Uncle" in chess — 2022-07-20
• Words from a quitter — 2020-08-01
• Verbal concession — 2020-04-26
• Chess concession — 2020-03-20
• Declaration at the end of a chess game — 2017-11-23
• Words of concession — 2016-08-28
• Work stoppage declaration? — 2014-08-13
• Quitter's cry — 2006-11-18
• Defeatist declaration — 1998-09-25