Where “Mittens” started

Chess.com, on Open web, Jan 1, 2023. It reached 4 platforms in 11 months.

LineageKey steps, 10 of 16. Lines follow time and platform
Chess.comFirst postGothamChessYouTubetr4dingstocks / valjean76Open webPlatform jumpPlatform jumpPressPeakOwner responsePressAfterlifePatient zero