game stadium checker complex lively version gravitybase logicpuzzle race game special concentric stadium require marble ball begin start quadrant stadium uppermost outermost ring early version game internal step ring later version change rule subtract ring simplify slow gamea player designate particular marble move particular slot particular slot move specific marble color slide ring marble describe marble fall low slot slide completedaccorde win move game objective stadium checker market roller bowl marble center stadium match color quadrant hole select move single ring slide select direction marble fall vacant slot force gravity single marble fall slot terminate movement turn marble fall incorrectly colored hole reintroduce rim stadium player corresponding color marblethis game usually call stadium checker intrigue reduction number ring seriously affect strategic complexity game redesign reduce overall size likely mishap small plastic ball occur cause illegal movesvariant restrict ring selection contact one marble make game strategically challenging designate ringmover reintroducer incorrectly finish marble own player complicate reentry reward key ring movement

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