What is Chalk-A-Block?
Chalk-a-Block is a Big Game that pits in a challenge to find markers and solve a puzzle in the shortest amount of time.

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Teams compete to find letters which are chalked on city sidewalks. The playing field is a predetermined grid of the city where the letters make up the words of a riddle.

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The placement of the letters comprise a shape of an object which along with the riddle will lead the teams to the hidden prize.
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