Upon the start player is presented with a “6 by 6” grid of tiles. One of the tiles hides a target that the player has to locate in order to finish the round. The tiles can be flipped over one at a time. Once flipped over the tile either reveals the target hidden under it or shows the distance to the target’s current position. If target is not located, it moves into one of the adjacent cells. Thus, the distance to the target on the flipped over tiles is shown with two numbers – the larger one indicating the distance to the target, the smaller one showing the step at which this distance was valid. The game's objective is to locate the target with the minimal number of tiles flipped. The total number of moves over all 21 rounds is the final score. Careful observation of the target positioning from round to round is advised.

More information at http://find21.blogspot.com

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