Instagram source desk. Grid is login-walled. Captions live in the Coach Chad voice archive. Puzzler loop: caption → link → Lichess board. Lesson writeups stay in ZONE and surface on /daily.
- Handle @the.chesszone
- Photo credit that recurs: @11brose
- X compressed register: @TCZ_CoachChad
New Instagram-tagged lessons use child category ZONE · Instagram plus ZONE. Historical 543 stay on ZONE only.