Jätkänshakki
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Jätkänshakki is a Finnish variant of Tic-tac-toe. It is played on a square board with either a limited size or an unlimited size. It is played in the same fashion as Tic-tac-toe excepting that the goal is to make 5 (or more) noughts or crosses in a row. It is a popular pastime in school both after and during class.