Flipchain is a two-player game played on a hexagonal board of any size, initially empty. Discs are colored red on one side and blue on the other side. Mark Steere designed Flipchain in December 2025. The two players, Red and Blue, take turns placing discs onto unoccupied cells on the board, with their own color face up, one disc per turn, starting with Red. Immediately following your placement, you must flip zero or more enemy discs to your color, concluding your turn. Voluntary passing is not allowed, but if you don't have any legal placements available, you skip your turn. Flipchain uses the pie rule. Your placed disc must form at least as many adjacencies with enemy discs as with friendly discs. Player creates path, a path is a single width sequence of one or more discs (of either or both colors) with corners of at most 120 degrees A loop is a closed path. To win the game players must form a loop of their color.

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