Historical clue formulations

• Popular logic puzzle — 2025-01-29
• Game also called MathDoku — 2024-06-28
• Logic puzzle invented by a math teacher as a teaching tool — 2021-12-14
• Puzzle whose name comes from the Japanese for "cleverness squared" — 2021-10-14
• Numbers game — 2018-08-29
• Math puzzle — 2017-09-01
• Popular puzzle invented in Japan — 2017-03-22
• Newspaper puzzle suggested by this crossword's shaded squares — 2015-11-03
• Diversion also called MathDoku — 2011-04-29