Historical clue formulations

• Disk-flipping strategy game — 2026-09-27
• Strategy game with disks — 2020-05-01
• Game played on an 8x8 board — 2017-12-15
• Classic game with black-and-white discs — 2017-10-09
• Another name for 23-Across — 2017-01-10
• ... with black-and-white disks — 2014-10-13
• Strategy game with disks — 2011-03-19
• Game on an 8 x 8 board — 2007-06-28