TwixT is a 2-player abstract game invented by Alex Randolph. Some old US sets mention a 4-player variant, with 2 teams as in Bridge, but this probably wasn't Randolph's idea. The game was popular in the 60s and 70s as part of the 3M Bookshelf Series. Avalon Hill then acquired the series and issued the game themselves. Now Hasbro owns AH, but they haven't marketed it yet.TwixT is a 'connection-type' game, very similar to Hex. Other related games are Havannah and The Game of Y. 'Connection type' means the object is to form a path connecting something to something else. This requires very different thinking from the standard battle-type game such as chess or checkers. - BoardGameGeek