Gomoku
Gomoku, also called "Five in a Row", is an abstract strategy board game. It is traditionally played with Go pieces (black and white stones) on a Go board, using 15×15 of the 19×19 grid intersections. Because pieces are not moved or removed from the board, Gomoku may also be played as a paper-and-pencil game. The game is known in several countries under different names.
Gossaum
Each Go is around 15m long, and consists of a large straw loop at the end of a long, thick cylinder, supported on poles. Two "tails", at the opposite end of the structure from the loop, serve to provide a rudimentary steering mechanism. During play, the two Go are lifted above head height by the teams, and the loops are brought into contact and pushed against one another. Due to the ritual nature of the contest, one team's Go is larger than the other, making the contest somewhat one-sided.