Casual Game Hoop Stack

Hoop Stack is a sorting puzzle that uses empty posts to organize both color and ring size. Only the top hoop of a post can move. The goal is to collect matching colors while respecting the current stage's capacity and size placement rules. Two exposed hoops of one color are not automatically worth combining: uncovering one may reveal a key piece for another group, and the transfer may consume the only temporary destination. At the opening, count empty posts, visible colors, and the locations of larger hoops, then choose a color that is already close to completion. While uncovering it, assign displaced colors according to whether they can later be recovered, not simply to the first empty post. Filling every spare post with unrelated colors can bury required pieces even while a few legal moves remain. Size restrictions make destinations scarcer. Preserve a compatible top for a large hoop; a small hoop is easy to park but may cover the only post that could accept the larger one. Every fully completed color removes one mixed stack from the problem and creates clearer working space, making one finished group more useful than partial progress on three or four colors. Near the end, simulate two moves before acting: after the current top leaves, can the exposed color merge immediately, and does the temporary hoop have a return destination? When the board locks, review the first move that filled the last empty post instead of breaking apart a finished color.