インヴァージョン (!nversion) is a trick-taking card game from Japan. The game has five suits (Crown being added as the fifth), and plays through as normal trick-taker, with players following the lead suit if they can. However, cards are played in a line, and if successive cards total to 11, the suit inverts. The second card becomes the lead suit. For example, the 10 of Spades has been played in the line. If a 1 of Hearts is now played, Hearts becomes the lead. —user summary

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