Historical clue formulations

• Sotto ___ — 2026-01-22
• Sotto ___ (quietly) — 2024-12-17
• Viva ___ (aloud) — 2021-07-18
• Mezza ___ — 2020-12-18
• Sotto ___ (quietly) — 2016-08-07
• Viva ___ (orally) — 2015-10-06
• Sotto ___ (under one's breath) — 2013-04-01
• Viva ___ — 2012-07-29
• Viva ___ — 2011-08-21
• Viva ___ — 2010-09-20
• Mezza ___ — 2010-02-11
• Viva ___ (by word of mouth) — 2004-04-20
• Viva ___ — 2004-01-24
• Viva ___ — 1999-08-22
• Una ___ (unanimously) — 1998-08-14