20 sur 20 (1978)

In 20 sur 20, players use their five drawn number domino-like tiles to form sums of 20 on a line. Each sum of 20 scores one point. A completed sum of 20 is sealed with 20 token on the start and end of the sum and cannot be reused. However one of the number used by the sum can be reused by a crossing sum of twenty made by a player. If he can make another sum twenty with his hand the player can play again, then at the end of his turn he refills his hand to reach again the number of 5 tiles.

The game end with the use of all the tiles, the winner is a player with the most points.

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