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The Tablut leaflet features a game where the king must reach an edge to win the game. The king must be surrounded on two sides to be captured, unless he is on or beside the central square, in which case four or three attackers are required to seize him. The king can take part in capturing enemies in this game.
This variant is the closest thing there is to an authentic "standard" in hnefatafl. It has been thoroughly play-tested and found to be very well-balanced, giving each side a roughly equal chance of winning. It is therefore ideal for tournament play.