He went to work for a few hours studying the cards in an Ontario tic-tac-toe game and was able to figure out how to beat the system and win almost all the time, based only on what was visible on unscratched cards.

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Example: One interviewee used the fact that Morrill played backgammon to explain how to play poker, explaining that in backgammon all the pieces are visible to both players, while in poker, the information is hidden behind the cards.

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